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Posted to commits@hbase.apache.org by mi...@apache.org on 2016/03/18 20:02:09 UTC
[03/23] hbase-site git commit: Published site at
3a6d683d63089c1986e68e531939df7328e58300.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/07fa263b/xref/org/apache/hadoop/hbase/client/ClientScanner.html
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@@ -32,768 +32,846 @@
<a class="jxr_linenumber" name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.apache.commons.logging.LogFactory;
<a class="jxr_linenumber" name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.conf.Configuration;
<a class="jxr_linenumber" name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.Cell;
-<a class="jxr_linenumber" name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.CellUtil;
-<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.DoNotRetryIOException;
-<a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.HBaseConfiguration;
-<a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.HConstants;
-<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.HRegionInfo;
-<a class="jxr_linenumber" name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.NotServingRegionException;
-<a class="jxr_linenumber" name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.TableName;
-<a class="jxr_linenumber" name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.UnknownScannerException;
-<a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.classification.InterfaceAudience;
-<a class="jxr_linenumber" name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;
-<a class="jxr_linenumber" name="35" href="#35">35</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.ipc.RpcControllerFactory;
-<a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.protobuf.ProtobufUtil;
-<a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.protobuf.generated.MapReduceProtos;
-<a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;
-<a class="jxr_linenumber" name="39" href="#39">39</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.Bytes;
-<a class="jxr_linenumber" name="40" href="#40">40</a>
-<a class="jxr_linenumber" name="41" href="#41">41</a> <strong class="jxr_keyword">import</strong> java.io.IOException;
-<a class="jxr_linenumber" name="42" href="#42">42</a> <strong class="jxr_keyword">import</strong> java.io.InterruptedIOException;
-<a class="jxr_linenumber" name="43" href="#43">43</a> <strong class="jxr_keyword">import</strong> java.util.ArrayList;
-<a class="jxr_linenumber" name="44" href="#44">44</a> <strong class="jxr_keyword">import</strong> java.util.Arrays;
-<a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">import</strong> java.util.LinkedList;
-<a class="jxr_linenumber" name="46" href="#46">46</a> <strong class="jxr_keyword">import</strong> java.util.List;
-<a class="jxr_linenumber" name="47" href="#47">47</a> <strong class="jxr_keyword">import</strong> java.util.Queue;
-<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutorService;
-<a class="jxr_linenumber" name="49" href="#49">49</a>
-<a class="jxr_linenumber" name="50" href="#50">50</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="51" href="#51">51</a> <em class="jxr_javadoccomment"> * Implements the scanner interface for the HBase client.</em>
-<a class="jxr_linenumber" name="52" href="#52">52</a> <em class="jxr_javadoccomment"> * If there are multiple regions in a table, this scanner will iterate</em>
-<a class="jxr_linenumber" name="53" href="#53">53</a> <em class="jxr_javadoccomment"> * through them all.</em>
-<a class="jxr_linenumber" name="54" href="#54">54</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="55" href="#55">55</a> @InterfaceAudience.Private
-<a class="jxr_linenumber" name="56" href="#56">56</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ClientScanner.html">ClientScanner</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../org/apache/hadoop/hbase/client/AbstractClientScanner.html">AbstractClientScanner</a> {
-<a class="jxr_linenumber" name="57" href="#57">57</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(ClientScanner.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="58" href="#58">58</a> <em class="jxr_comment">// A byte array in which all elements are the max byte, and it is used to</em>
-<a class="jxr_linenumber" name="59" href="#59">59</a> <em class="jxr_comment">// construct closest front row</em>
-<a class="jxr_linenumber" name="60" href="#60">60</a> <strong class="jxr_keyword">static</strong> byte[] MAX_BYTE_ARRAY = Bytes.createMaxByteArray(9);
-<a class="jxr_linenumber" name="61" href="#61">61</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html">Scan</a> scan;
-<a class="jxr_linenumber" name="62" href="#62">62</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> closed = false;
-<a class="jxr_linenumber" name="63" href="#63">63</a> <em class="jxr_comment">// Current region scanner is against. Gets cleared if current region goes</em>
-<a class="jxr_linenumber" name="64" href="#64">64</a> <em class="jxr_comment">// wonky: e.g. if it splits on us.</em>
-<a class="jxr_linenumber" name="65" href="#65">65</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/HRegionInfo.html">HRegionInfo</a> currentRegion = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a> callable = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="67" href="#67">67</a> <strong class="jxr_keyword">protected</strong> Queue<Result> cache;
-<a class="jxr_linenumber" name="68" href="#68">68</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="69" href="#69">69</a> <em class="jxr_javadoccomment"> * A list of partial results that have been returned from the server. This list should only</em>
-<a class="jxr_linenumber" name="70" href="#70">70</a> <em class="jxr_javadoccomment"> * contain results if this scanner does not have enough partial results to form the complete</em>
-<a class="jxr_linenumber" name="71" href="#71">71</a> <em class="jxr_javadoccomment"> * result.</em>
-<a class="jxr_linenumber" name="72" href="#72">72</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="73" href="#73">73</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> LinkedList<Result> partialResults = <strong class="jxr_keyword">new</strong> LinkedList<Result>();
-<a class="jxr_linenumber" name="74" href="#74">74</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="75" href="#75">75</a> <em class="jxr_javadoccomment"> * The row for which we are accumulating partial Results (i.e. the row of the Results stored</em>
-<a class="jxr_linenumber" name="76" href="#76">76</a> <em class="jxr_javadoccomment"> * inside partialResults). Changes to partialResultsRow and partialResults are kept in sync</em>
-<a class="jxr_linenumber" name="77" href="#77">77</a> <em class="jxr_javadoccomment"> * via the methods {@link #addToPartialResults(Result)} and {@link #clearPartialResults()}</em>
-<a class="jxr_linenumber" name="78" href="#78">78</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="79" href="#79">79</a> <strong class="jxr_keyword">protected</strong> byte[] partialResultsRow = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="80" href="#80">80</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> caching;
-<a class="jxr_linenumber" name="81" href="#81">81</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> lastNext;
-<a class="jxr_linenumber" name="82" href="#82">82</a> <em class="jxr_comment">// Keep lastResult returned successfully in case we have to reset scanner.</em>
-<a class="jxr_linenumber" name="83" href="#83">83</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Result.html">Result</a> lastResult = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="84" href="#84">84</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> maxScannerResultSize;
-<a class="jxr_linenumber" name="85" href="#85">85</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ClusterConnection.html">ClusterConnection</a> connection;
-<a class="jxr_linenumber" name="86" href="#86">86</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/hadoop/hbase/TableName.html">TableName</a> tableName;
-<a class="jxr_linenumber" name="87" href="#87">87</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> scannerTimeout;
-<a class="jxr_linenumber" name="88" href="#88">88</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> scanMetricsPublished = false;
-<a class="jxr_linenumber" name="89" href="#89">89</a> <strong class="jxr_keyword">protected</strong> RpcRetryingCaller<Result []> caller;
-<a class="jxr_linenumber" name="90" href="#90">90</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/ipc/RpcControllerFactory.html">RpcControllerFactory</a> rpcControllerFactory;
-<a class="jxr_linenumber" name="91" href="#91">91</a> <strong class="jxr_keyword">protected</strong> Configuration conf;
-<a class="jxr_linenumber" name="92" href="#92">92</a> <em class="jxr_comment">//The timeout on the primary. Applicable if there are multiple replicas for a region</em>
-<a class="jxr_linenumber" name="93" href="#93">93</a> <em class="jxr_comment">//In that case, we will only wait for this much timeout on the primary before going</em>
-<a class="jxr_linenumber" name="94" href="#94">94</a> <em class="jxr_comment">//to the replicas and trying the same scan. Note that the retries will still happen</em>
-<a class="jxr_linenumber" name="95" href="#95">95</a> <em class="jxr_comment">//on each replica and the first successful results will be taken. A timeout of 0 is</em>
-<a class="jxr_linenumber" name="96" href="#96">96</a> <em class="jxr_comment">//disallowed.</em>
-<a class="jxr_linenumber" name="97" href="#97">97</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> primaryOperationTimeout;
-<a class="jxr_linenumber" name="98" href="#98">98</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> retries;
-<a class="jxr_linenumber" name="99" href="#99">99</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> ExecutorService pool;
-<a class="jxr_linenumber" name="100" href="#100">100</a>
-<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="102" href="#102">102</a> <em class="jxr_javadoccomment"> * Create a new ClientScanner for the specified table Note that the passed {@link Scan}'s start</em>
-<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_javadoccomment"> * row maybe changed changed.</em>
-<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_javadoccomment"> * @param conf The {@link Configuration} to use.</em>
-<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_javadoccomment"> * @param scan {@link Scan} to use in this scanner</em>
-<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_javadoccomment"> * @param tableName The table that we wish to scan</em>
-<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_javadoccomment"> * @param connection Connection identifying the cluster</em>
-<a class="jxr_linenumber" name="108" href="#108">108</a> <em class="jxr_javadoccomment"> * @throws IOException</em>
-<a class="jxr_linenumber" name="109" href="#109">109</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="110" href="#110">110</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ClientScanner.html">ClientScanner</a>(<strong class="jxr_keyword">final</strong> Configuration conf, <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html">Scan</a> scan, <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/hadoop/hbase/TableName.html">TableName</a> tableName,
-<a class="jxr_linenumber" name="111" href="#111">111</a> <a href="../../../../../org/apache/hadoop/hbase/client/ClusterConnection.html">ClusterConnection</a> connection, <a href="../../../../../org/apache/hadoop/hbase/client/RpcRetryingCallerFactory.html">RpcRetryingCallerFactory</a> rpcFactory,
-<a class="jxr_linenumber" name="112" href="#112">112</a> <a href="../../../../../org/apache/hadoop/hbase/ipc/RpcControllerFactory.html">RpcControllerFactory</a> controllerFactory, ExecutorService pool, <strong class="jxr_keyword">int</strong> primaryOperationTimeout)
-<a class="jxr_linenumber" name="113" href="#113">113</a> <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="114" href="#114">114</a> <strong class="jxr_keyword">if</strong> (LOG.isTraceEnabled()) {
-<a class="jxr_linenumber" name="115" href="#115">115</a> LOG.trace(<span class="jxr_string">"Scan table="</span> + tableName
-<a class="jxr_linenumber" name="116" href="#116">116</a> + <span class="jxr_string">", startRow="</span> + Bytes.toStringBinary(scan.getStartRow()));
-<a class="jxr_linenumber" name="117" href="#117">117</a> }
-<a class="jxr_linenumber" name="118" href="#118">118</a> <strong class="jxr_keyword">this</strong>.scan = scan;
-<a class="jxr_linenumber" name="119" href="#119">119</a> <strong class="jxr_keyword">this</strong>.tableName = tableName;
-<a class="jxr_linenumber" name="120" href="#120">120</a> <strong class="jxr_keyword">this</strong>.lastNext = System.currentTimeMillis();
-<a class="jxr_linenumber" name="121" href="#121">121</a> <strong class="jxr_keyword">this</strong>.connection = connection;
-<a class="jxr_linenumber" name="122" href="#122">122</a> <strong class="jxr_keyword">this</strong>.pool = pool;
-<a class="jxr_linenumber" name="123" href="#123">123</a> <strong class="jxr_keyword">this</strong>.primaryOperationTimeout = primaryOperationTimeout;
-<a class="jxr_linenumber" name="124" href="#124">124</a> <strong class="jxr_keyword">this</strong>.retries = conf.getInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER,
-<a class="jxr_linenumber" name="125" href="#125">125</a> HConstants.DEFAULT_HBASE_CLIENT_RETRIES_NUMBER);
-<a class="jxr_linenumber" name="126" href="#126">126</a> <strong class="jxr_keyword">if</strong> (scan.getMaxResultSize() > 0) {
-<a class="jxr_linenumber" name="127" href="#127">127</a> <strong class="jxr_keyword">this</strong>.maxScannerResultSize = scan.getMaxResultSize();
-<a class="jxr_linenumber" name="128" href="#128">128</a> } <strong class="jxr_keyword">else</strong> {
-<a class="jxr_linenumber" name="129" href="#129">129</a> <strong class="jxr_keyword">this</strong>.maxScannerResultSize = conf.getLong(
-<a class="jxr_linenumber" name="130" href="#130">130</a> HConstants.HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY,
-<a class="jxr_linenumber" name="131" href="#131">131</a> HConstants.DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE);
-<a class="jxr_linenumber" name="132" href="#132">132</a> }
-<a class="jxr_linenumber" name="133" href="#133">133</a> <strong class="jxr_keyword">this</strong>.scannerTimeout = HBaseConfiguration.getInt(conf,
-<a class="jxr_linenumber" name="134" href="#134">134</a> HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD,
-<a class="jxr_linenumber" name="135" href="#135">135</a> HConstants.HBASE_REGIONSERVER_LEASE_PERIOD_KEY,
-<a class="jxr_linenumber" name="136" href="#136">136</a> HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD);
-<a class="jxr_linenumber" name="137" href="#137">137</a>
-<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_comment">// check if application wants to collect scan metrics</em>
-<a class="jxr_linenumber" name="139" href="#139">139</a> initScanMetrics(scan);
-<a class="jxr_linenumber" name="140" href="#140">140</a>
-<a class="jxr_linenumber" name="141" href="#141">141</a> <em class="jxr_comment">// Use the caching from the Scan. If not set, use the default cache setting for this table.</em>
-<a class="jxr_linenumber" name="142" href="#142">142</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.scan.getCaching() > 0) {
-<a class="jxr_linenumber" name="143" href="#143">143</a> <strong class="jxr_keyword">this</strong>.caching = <strong class="jxr_keyword">this</strong>.scan.getCaching();
-<a class="jxr_linenumber" name="144" href="#144">144</a> } <strong class="jxr_keyword">else</strong> {
-<a class="jxr_linenumber" name="145" href="#145">145</a> <strong class="jxr_keyword">this</strong>.caching = conf.getInt(
-<a class="jxr_linenumber" name="146" href="#146">146</a> HConstants.HBASE_CLIENT_SCANNER_CACHING,
-<a class="jxr_linenumber" name="147" href="#147">147</a> HConstants.DEFAULT_HBASE_CLIENT_SCANNER_CACHING);
-<a class="jxr_linenumber" name="148" href="#148">148</a> }
-<a class="jxr_linenumber" name="149" href="#149">149</a>
-<a class="jxr_linenumber" name="150" href="#150">150</a> <strong class="jxr_keyword">this</strong>.caller = rpcFactory.<Result[]> newCaller();
-<a class="jxr_linenumber" name="151" href="#151">151</a> <strong class="jxr_keyword">this</strong>.rpcControllerFactory = controllerFactory;
-<a class="jxr_linenumber" name="152" href="#152">152</a>
-<a class="jxr_linenumber" name="153" href="#153">153</a> <strong class="jxr_keyword">this</strong>.conf = conf;
-<a class="jxr_linenumber" name="154" href="#154">154</a> initCache();
-<a class="jxr_linenumber" name="155" href="#155">155</a> initializeScannerInConstruction();
-<a class="jxr_linenumber" name="156" href="#156">156</a> }
+<a class="jxr_linenumber" name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.CellComparator;
+<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.CellUtil;
+<a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.DoNotRetryIOException;
+<a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.HBaseConfiguration;
+<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.HConstants;
+<a class="jxr_linenumber" name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.HRegionInfo;
+<a class="jxr_linenumber" name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.NotServingRegionException;
+<a class="jxr_linenumber" name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.TableName;
+<a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.UnknownScannerException;
+<a class="jxr_linenumber" name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.classification.InterfaceAudience;
+<a class="jxr_linenumber" name="35" href="#35">35</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;
+<a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.ipc.RpcControllerFactory;
+<a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+<a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.protobuf.generated.MapReduceProtos;
+<a class="jxr_linenumber" name="39" href="#39">39</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;
+<a class="jxr_linenumber" name="40" href="#40">40</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.Bytes;
+<a class="jxr_linenumber" name="41" href="#41">41</a>
+<a class="jxr_linenumber" name="42" href="#42">42</a> <strong class="jxr_keyword">import</strong> java.io.IOException;
+<a class="jxr_linenumber" name="43" href="#43">43</a> <strong class="jxr_keyword">import</strong> java.io.InterruptedIOException;
+<a class="jxr_linenumber" name="44" href="#44">44</a> <strong class="jxr_keyword">import</strong> java.util.ArrayList;
+<a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">import</strong> java.util.Arrays;
+<a class="jxr_linenumber" name="46" href="#46">46</a> <strong class="jxr_keyword">import</strong> java.util.LinkedList;
+<a class="jxr_linenumber" name="47" href="#47">47</a> <strong class="jxr_keyword">import</strong> java.util.List;
+<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">import</strong> java.util.Queue;
+<a class="jxr_linenumber" name="49" href="#49">49</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutorService;
+<a class="jxr_linenumber" name="50" href="#50">50</a>
+<a class="jxr_linenumber" name="51" href="#51">51</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="52" href="#52">52</a> <em class="jxr_javadoccomment"> * Implements the scanner interface for the HBase client.</em>
+<a class="jxr_linenumber" name="53" href="#53">53</a> <em class="jxr_javadoccomment"> * If there are multiple regions in a table, this scanner will iterate</em>
+<a class="jxr_linenumber" name="54" href="#54">54</a> <em class="jxr_javadoccomment"> * through them all.</em>
+<a class="jxr_linenumber" name="55" href="#55">55</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="56" href="#56">56</a> @InterfaceAudience.Private
+<a class="jxr_linenumber" name="57" href="#57">57</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ClientScanner.html">ClientScanner</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../org/apache/hadoop/hbase/client/AbstractClientScanner.html">AbstractClientScanner</a> {
+<a class="jxr_linenumber" name="58" href="#58">58</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(ClientScanner.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="59" href="#59">59</a> <em class="jxr_comment">// A byte array in which all elements are the max byte, and it is used to</em>
+<a class="jxr_linenumber" name="60" href="#60">60</a> <em class="jxr_comment">// construct closest front row</em>
+<a class="jxr_linenumber" name="61" href="#61">61</a> <strong class="jxr_keyword">static</strong> byte[] MAX_BYTE_ARRAY = Bytes.createMaxByteArray(9);
+<a class="jxr_linenumber" name="62" href="#62">62</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html">Scan</a> scan;
+<a class="jxr_linenumber" name="63" href="#63">63</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> closed = false;
+<a class="jxr_linenumber" name="64" href="#64">64</a> <em class="jxr_comment">// Current region scanner is against. Gets cleared if current region goes</em>
+<a class="jxr_linenumber" name="65" href="#65">65</a> <em class="jxr_comment">// wonky: e.g. if it splits on us.</em>
+<a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/HRegionInfo.html">HRegionInfo</a> currentRegion = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="67" href="#67">67</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a> callable = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="68" href="#68">68</a> <strong class="jxr_keyword">protected</strong> Queue<Result> cache;
+<a class="jxr_linenumber" name="69" href="#69">69</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="70" href="#70">70</a> <em class="jxr_javadoccomment"> * A list of partial results that have been returned from the server. This list should only</em>
+<a class="jxr_linenumber" name="71" href="#71">71</a> <em class="jxr_javadoccomment"> * contain results if this scanner does not have enough partial results to form the complete</em>
+<a class="jxr_linenumber" name="72" href="#72">72</a> <em class="jxr_javadoccomment"> * result.</em>
+<a class="jxr_linenumber" name="73" href="#73">73</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="74" href="#74">74</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> LinkedList<Result> partialResults = <strong class="jxr_keyword">new</strong> LinkedList<Result>();
+<a class="jxr_linenumber" name="75" href="#75">75</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="76" href="#76">76</a> <em class="jxr_javadoccomment"> * The row for which we are accumulating partial Results (i.e. the row of the Results stored</em>
+<a class="jxr_linenumber" name="77" href="#77">77</a> <em class="jxr_javadoccomment"> * inside partialResults). Changes to partialResultsRow and partialResults are kept in sync</em>
+<a class="jxr_linenumber" name="78" href="#78">78</a> <em class="jxr_javadoccomment"> * via the methods {@link #addToPartialResults(Result)} and {@link #clearPartialResults()}</em>
+<a class="jxr_linenumber" name="79" href="#79">79</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="80" href="#80">80</a> <strong class="jxr_keyword">protected</strong> byte[] partialResultsRow = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="81" href="#81">81</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="82" href="#82">82</a> <em class="jxr_javadoccomment"> * The last cell from a not full Row which is added to cache</em>
+<a class="jxr_linenumber" name="83" href="#83">83</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="84" href="#84">84</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/Cell.html">Cell</a> lastCellLoadedToCache = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="85" href="#85">85</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> caching;
+<a class="jxr_linenumber" name="86" href="#86">86</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> lastNext;
+<a class="jxr_linenumber" name="87" href="#87">87</a> <em class="jxr_comment">// Keep lastResult returned successfully in case we have to reset scanner.</em>
+<a class="jxr_linenumber" name="88" href="#88">88</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Result.html">Result</a> lastResult = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="89" href="#89">89</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> maxScannerResultSize;
+<a class="jxr_linenumber" name="90" href="#90">90</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ClusterConnection.html">ClusterConnection</a> connection;
+<a class="jxr_linenumber" name="91" href="#91">91</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/hadoop/hbase/TableName.html">TableName</a> tableName;
+<a class="jxr_linenumber" name="92" href="#92">92</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> scannerTimeout;
+<a class="jxr_linenumber" name="93" href="#93">93</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> scanMetricsPublished = false;
+<a class="jxr_linenumber" name="94" href="#94">94</a> <strong class="jxr_keyword">protected</strong> RpcRetryingCaller<Result []> caller;
+<a class="jxr_linenumber" name="95" href="#95">95</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/ipc/RpcControllerFactory.html">RpcControllerFactory</a> rpcControllerFactory;
+<a class="jxr_linenumber" name="96" href="#96">96</a> <strong class="jxr_keyword">protected</strong> Configuration conf;
+<a class="jxr_linenumber" name="97" href="#97">97</a> <em class="jxr_comment">//The timeout on the primary. Applicable if there are multiple replicas for a region</em>
+<a class="jxr_linenumber" name="98" href="#98">98</a> <em class="jxr_comment">//In that case, we will only wait for this much timeout on the primary before going</em>
+<a class="jxr_linenumber" name="99" href="#99">99</a> <em class="jxr_comment">//to the replicas and trying the same scan. Note that the retries will still happen</em>
+<a class="jxr_linenumber" name="100" href="#100">100</a> <em class="jxr_comment">//on each replica and the first successful results will be taken. A timeout of 0 is</em>
+<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_comment">//disallowed.</em>
+<a class="jxr_linenumber" name="102" href="#102">102</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> primaryOperationTimeout;
+<a class="jxr_linenumber" name="103" href="#103">103</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> retries;
+<a class="jxr_linenumber" name="104" href="#104">104</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> ExecutorService pool;
+<a class="jxr_linenumber" name="105" href="#105">105</a>
+<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_javadoccomment"> * Create a new ClientScanner for the specified table Note that the passed {@link Scan}'s start</em>
+<a class="jxr_linenumber" name="108" href="#108">108</a> <em class="jxr_javadoccomment"> * row maybe changed changed.</em>
+<a class="jxr_linenumber" name="109" href="#109">109</a> <em class="jxr_javadoccomment"> * @param conf The {@link Configuration} to use.</em>
+<a class="jxr_linenumber" name="110" href="#110">110</a> <em class="jxr_javadoccomment"> * @param scan {@link Scan} to use in this scanner</em>
+<a class="jxr_linenumber" name="111" href="#111">111</a> <em class="jxr_javadoccomment"> * @param tableName The table that we wish to scan</em>
+<a class="jxr_linenumber" name="112" href="#112">112</a> <em class="jxr_javadoccomment"> * @param connection Connection identifying the cluster</em>
+<a class="jxr_linenumber" name="113" href="#113">113</a> <em class="jxr_javadoccomment"> * @throws IOException</em>
+<a class="jxr_linenumber" name="114" href="#114">114</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="115" href="#115">115</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ClientScanner.html">ClientScanner</a>(<strong class="jxr_keyword">final</strong> Configuration conf, <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html">Scan</a> scan, <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/hadoop/hbase/TableName.html">TableName</a> tableName,
+<a class="jxr_linenumber" name="116" href="#116">116</a> <a href="../../../../../org/apache/hadoop/hbase/client/ClusterConnection.html">ClusterConnection</a> connection, <a href="../../../../../org/apache/hadoop/hbase/client/RpcRetryingCallerFactory.html">RpcRetryingCallerFactory</a> rpcFactory,
+<a class="jxr_linenumber" name="117" href="#117">117</a> <a href="../../../../../org/apache/hadoop/hbase/ipc/RpcControllerFactory.html">RpcControllerFactory</a> controllerFactory, ExecutorService pool, <strong class="jxr_keyword">int</strong> primaryOperationTimeout)
+<a class="jxr_linenumber" name="118" href="#118">118</a> <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="119" href="#119">119</a> <strong class="jxr_keyword">if</strong> (LOG.isTraceEnabled()) {
+<a class="jxr_linenumber" name="120" href="#120">120</a> LOG.trace(<span class="jxr_string">"Scan table="</span> + tableName
+<a class="jxr_linenumber" name="121" href="#121">121</a> + <span class="jxr_string">", startRow="</span> + Bytes.toStringBinary(scan.getStartRow()));
+<a class="jxr_linenumber" name="122" href="#122">122</a> }
+<a class="jxr_linenumber" name="123" href="#123">123</a> <strong class="jxr_keyword">this</strong>.scan = scan;
+<a class="jxr_linenumber" name="124" href="#124">124</a> <strong class="jxr_keyword">this</strong>.tableName = tableName;
+<a class="jxr_linenumber" name="125" href="#125">125</a> <strong class="jxr_keyword">this</strong>.lastNext = System.currentTimeMillis();
+<a class="jxr_linenumber" name="126" href="#126">126</a> <strong class="jxr_keyword">this</strong>.connection = connection;
+<a class="jxr_linenumber" name="127" href="#127">127</a> <strong class="jxr_keyword">this</strong>.pool = pool;
+<a class="jxr_linenumber" name="128" href="#128">128</a> <strong class="jxr_keyword">this</strong>.primaryOperationTimeout = primaryOperationTimeout;
+<a class="jxr_linenumber" name="129" href="#129">129</a> <strong class="jxr_keyword">this</strong>.retries = conf.getInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER,
+<a class="jxr_linenumber" name="130" href="#130">130</a> HConstants.DEFAULT_HBASE_CLIENT_RETRIES_NUMBER);
+<a class="jxr_linenumber" name="131" href="#131">131</a> <strong class="jxr_keyword">if</strong> (scan.getMaxResultSize() > 0) {
+<a class="jxr_linenumber" name="132" href="#132">132</a> <strong class="jxr_keyword">this</strong>.maxScannerResultSize = scan.getMaxResultSize();
+<a class="jxr_linenumber" name="133" href="#133">133</a> } <strong class="jxr_keyword">else</strong> {
+<a class="jxr_linenumber" name="134" href="#134">134</a> <strong class="jxr_keyword">this</strong>.maxScannerResultSize = conf.getLong(
+<a class="jxr_linenumber" name="135" href="#135">135</a> HConstants.HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY,
+<a class="jxr_linenumber" name="136" href="#136">136</a> HConstants.DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE);
+<a class="jxr_linenumber" name="137" href="#137">137</a> }
+<a class="jxr_linenumber" name="138" href="#138">138</a> <strong class="jxr_keyword">this</strong>.scannerTimeout = HBaseConfiguration.getInt(conf,
+<a class="jxr_linenumber" name="139" href="#139">139</a> HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD,
+<a class="jxr_linenumber" name="140" href="#140">140</a> HConstants.HBASE_REGIONSERVER_LEASE_PERIOD_KEY,
+<a class="jxr_linenumber" name="141" href="#141">141</a> HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD);
+<a class="jxr_linenumber" name="142" href="#142">142</a>
+<a class="jxr_linenumber" name="143" href="#143">143</a> <em class="jxr_comment">// check if application wants to collect scan metrics</em>
+<a class="jxr_linenumber" name="144" href="#144">144</a> initScanMetrics(scan);
+<a class="jxr_linenumber" name="145" href="#145">145</a>
+<a class="jxr_linenumber" name="146" href="#146">146</a> <em class="jxr_comment">// Use the caching from the Scan. If not set, use the default cache setting for this table.</em>
+<a class="jxr_linenumber" name="147" href="#147">147</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.scan.getCaching() > 0) {
+<a class="jxr_linenumber" name="148" href="#148">148</a> <strong class="jxr_keyword">this</strong>.caching = <strong class="jxr_keyword">this</strong>.scan.getCaching();
+<a class="jxr_linenumber" name="149" href="#149">149</a> } <strong class="jxr_keyword">else</strong> {
+<a class="jxr_linenumber" name="150" href="#150">150</a> <strong class="jxr_keyword">this</strong>.caching = conf.getInt(
+<a class="jxr_linenumber" name="151" href="#151">151</a> HConstants.HBASE_CLIENT_SCANNER_CACHING,
+<a class="jxr_linenumber" name="152" href="#152">152</a> HConstants.DEFAULT_HBASE_CLIENT_SCANNER_CACHING);
+<a class="jxr_linenumber" name="153" href="#153">153</a> }
+<a class="jxr_linenumber" name="154" href="#154">154</a>
+<a class="jxr_linenumber" name="155" href="#155">155</a> <strong class="jxr_keyword">this</strong>.caller = rpcFactory.<Result[]> newCaller();
+<a class="jxr_linenumber" name="156" href="#156">156</a> <strong class="jxr_keyword">this</strong>.rpcControllerFactory = controllerFactory;
<a class="jxr_linenumber" name="157" href="#157">157</a>
-<a class="jxr_linenumber" name="158" href="#158">158</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">void</strong> initCache();
-<a class="jxr_linenumber" name="159" href="#159">159</a>
-<a class="jxr_linenumber" name="160" href="#160">160</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> initializeScannerInConstruction() <strong class="jxr_keyword">throws</strong> IOException{
-<a class="jxr_linenumber" name="161" href="#161">161</a> <em class="jxr_comment">// initialize the scanner</em>
-<a class="jxr_linenumber" name="162" href="#162">162</a> nextScanner(<strong class="jxr_keyword">this</strong>.caching, false);
-<a class="jxr_linenumber" name="163" href="#163">163</a> }
+<a class="jxr_linenumber" name="158" href="#158">158</a> <strong class="jxr_keyword">this</strong>.conf = conf;
+<a class="jxr_linenumber" name="159" href="#159">159</a> initCache();
+<a class="jxr_linenumber" name="160" href="#160">160</a> initializeScannerInConstruction();
+<a class="jxr_linenumber" name="161" href="#161">161</a> }
+<a class="jxr_linenumber" name="162" href="#162">162</a>
+<a class="jxr_linenumber" name="163" href="#163">163</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">void</strong> initCache();
<a class="jxr_linenumber" name="164" href="#164">164</a>
-<a class="jxr_linenumber" name="165" href="#165">165</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ClusterConnection.html">ClusterConnection</a> getConnection() {
-<a class="jxr_linenumber" name="166" href="#166">166</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.connection;
-<a class="jxr_linenumber" name="167" href="#167">167</a> }
-<a class="jxr_linenumber" name="168" href="#168">168</a>
-<a class="jxr_linenumber" name="169" href="#169">169</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/TableName.html">TableName</a> getTable() {
-<a class="jxr_linenumber" name="170" href="#170">170</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.tableName;
-<a class="jxr_linenumber" name="171" href="#171">171</a> }
-<a class="jxr_linenumber" name="172" href="#172">172</a>
-<a class="jxr_linenumber" name="173" href="#173">173</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> getRetries() {
-<a class="jxr_linenumber" name="174" href="#174">174</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.retries;
-<a class="jxr_linenumber" name="175" href="#175">175</a> }
-<a class="jxr_linenumber" name="176" href="#176">176</a>
-<a class="jxr_linenumber" name="177" href="#177">177</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> getScannerTimeout() {
-<a class="jxr_linenumber" name="178" href="#178">178</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.scannerTimeout;
-<a class="jxr_linenumber" name="179" href="#179">179</a> }
-<a class="jxr_linenumber" name="180" href="#180">180</a>
-<a class="jxr_linenumber" name="181" href="#181">181</a> <strong class="jxr_keyword">protected</strong> Configuration getConf() {
-<a class="jxr_linenumber" name="182" href="#182">182</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.conf;
-<a class="jxr_linenumber" name="183" href="#183">183</a> }
-<a class="jxr_linenumber" name="184" href="#184">184</a>
-<a class="jxr_linenumber" name="185" href="#185">185</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html">Scan</a> getScan() {
-<a class="jxr_linenumber" name="186" href="#186">186</a> <strong class="jxr_keyword">return</strong> scan;
-<a class="jxr_linenumber" name="187" href="#187">187</a> }
-<a class="jxr_linenumber" name="188" href="#188">188</a>
-<a class="jxr_linenumber" name="189" href="#189">189</a> <strong class="jxr_keyword">protected</strong> ExecutorService getPool() {
-<a class="jxr_linenumber" name="190" href="#190">190</a> <strong class="jxr_keyword">return</strong> pool;
-<a class="jxr_linenumber" name="191" href="#191">191</a> }
-<a class="jxr_linenumber" name="192" href="#192">192</a>
-<a class="jxr_linenumber" name="193" href="#193">193</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> getPrimaryOperationTimeout() {
-<a class="jxr_linenumber" name="194" href="#194">194</a> <strong class="jxr_keyword">return</strong> primaryOperationTimeout;
-<a class="jxr_linenumber" name="195" href="#195">195</a> }
-<a class="jxr_linenumber" name="196" href="#196">196</a>
-<a class="jxr_linenumber" name="197" href="#197">197</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> getCaching() {
-<a class="jxr_linenumber" name="198" href="#198">198</a> <strong class="jxr_keyword">return</strong> caching;
-<a class="jxr_linenumber" name="199" href="#199">199</a> }
-<a class="jxr_linenumber" name="200" href="#200">200</a>
-<a class="jxr_linenumber" name="201" href="#201">201</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> getTimestamp() {
-<a class="jxr_linenumber" name="202" href="#202">202</a> <strong class="jxr_keyword">return</strong> lastNext;
-<a class="jxr_linenumber" name="203" href="#203">203</a> }
-<a class="jxr_linenumber" name="204" href="#204">204</a>
-<a class="jxr_linenumber" name="205" href="#205">205</a> @VisibleForTesting
-<a class="jxr_linenumber" name="206" href="#206">206</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> getMaxResultSize() {
-<a class="jxr_linenumber" name="207" href="#207">207</a> <strong class="jxr_keyword">return</strong> maxScannerResultSize;
+<a class="jxr_linenumber" name="165" href="#165">165</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> initializeScannerInConstruction() <strong class="jxr_keyword">throws</strong> IOException{
+<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_comment">// initialize the scanner</em>
+<a class="jxr_linenumber" name="167" href="#167">167</a> nextScanner(<strong class="jxr_keyword">this</strong>.caching, false);
+<a class="jxr_linenumber" name="168" href="#168">168</a> }
+<a class="jxr_linenumber" name="169" href="#169">169</a>
+<a class="jxr_linenumber" name="170" href="#170">170</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ClusterConnection.html">ClusterConnection</a> getConnection() {
+<a class="jxr_linenumber" name="171" href="#171">171</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.connection;
+<a class="jxr_linenumber" name="172" href="#172">172</a> }
+<a class="jxr_linenumber" name="173" href="#173">173</a>
+<a class="jxr_linenumber" name="174" href="#174">174</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/TableName.html">TableName</a> getTable() {
+<a class="jxr_linenumber" name="175" href="#175">175</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.tableName;
+<a class="jxr_linenumber" name="176" href="#176">176</a> }
+<a class="jxr_linenumber" name="177" href="#177">177</a>
+<a class="jxr_linenumber" name="178" href="#178">178</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> getRetries() {
+<a class="jxr_linenumber" name="179" href="#179">179</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.retries;
+<a class="jxr_linenumber" name="180" href="#180">180</a> }
+<a class="jxr_linenumber" name="181" href="#181">181</a>
+<a class="jxr_linenumber" name="182" href="#182">182</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> getScannerTimeout() {
+<a class="jxr_linenumber" name="183" href="#183">183</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.scannerTimeout;
+<a class="jxr_linenumber" name="184" href="#184">184</a> }
+<a class="jxr_linenumber" name="185" href="#185">185</a>
+<a class="jxr_linenumber" name="186" href="#186">186</a> <strong class="jxr_keyword">protected</strong> Configuration getConf() {
+<a class="jxr_linenumber" name="187" href="#187">187</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.conf;
+<a class="jxr_linenumber" name="188" href="#188">188</a> }
+<a class="jxr_linenumber" name="189" href="#189">189</a>
+<a class="jxr_linenumber" name="190" href="#190">190</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html">Scan</a> getScan() {
+<a class="jxr_linenumber" name="191" href="#191">191</a> <strong class="jxr_keyword">return</strong> scan;
+<a class="jxr_linenumber" name="192" href="#192">192</a> }
+<a class="jxr_linenumber" name="193" href="#193">193</a>
+<a class="jxr_linenumber" name="194" href="#194">194</a> <strong class="jxr_keyword">protected</strong> ExecutorService getPool() {
+<a class="jxr_linenumber" name="195" href="#195">195</a> <strong class="jxr_keyword">return</strong> pool;
+<a class="jxr_linenumber" name="196" href="#196">196</a> }
+<a class="jxr_linenumber" name="197" href="#197">197</a>
+<a class="jxr_linenumber" name="198" href="#198">198</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> getPrimaryOperationTimeout() {
+<a class="jxr_linenumber" name="199" href="#199">199</a> <strong class="jxr_keyword">return</strong> primaryOperationTimeout;
+<a class="jxr_linenumber" name="200" href="#200">200</a> }
+<a class="jxr_linenumber" name="201" href="#201">201</a>
+<a class="jxr_linenumber" name="202" href="#202">202</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> getCaching() {
+<a class="jxr_linenumber" name="203" href="#203">203</a> <strong class="jxr_keyword">return</strong> caching;
+<a class="jxr_linenumber" name="204" href="#204">204</a> }
+<a class="jxr_linenumber" name="205" href="#205">205</a>
+<a class="jxr_linenumber" name="206" href="#206">206</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> getTimestamp() {
+<a class="jxr_linenumber" name="207" href="#207">207</a> <strong class="jxr_keyword">return</strong> lastNext;
<a class="jxr_linenumber" name="208" href="#208">208</a> }
<a class="jxr_linenumber" name="209" href="#209">209</a>
-<a class="jxr_linenumber" name="210" href="#210">210</a> <em class="jxr_comment">// returns true if the passed region endKey</em>
-<a class="jxr_linenumber" name="211" href="#211">211</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> checkScanStopRow(<strong class="jxr_keyword">final</strong> byte [] endKey) {
-<a class="jxr_linenumber" name="212" href="#212">212</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.scan.getStopRow().length > 0) {
-<a class="jxr_linenumber" name="213" href="#213">213</a> <em class="jxr_comment">// there is a stop row, check to see if we are past it.</em>
-<a class="jxr_linenumber" name="214" href="#214">214</a> byte [] stopRow = scan.getStopRow();
-<a class="jxr_linenumber" name="215" href="#215">215</a> <strong class="jxr_keyword">int</strong> cmp = Bytes.compareTo(stopRow, 0, stopRow.length,
-<a class="jxr_linenumber" name="216" href="#216">216</a> endKey, 0, endKey.length);
-<a class="jxr_linenumber" name="217" href="#217">217</a> <strong class="jxr_keyword">if</strong> (cmp <= 0) {
-<a class="jxr_linenumber" name="218" href="#218">218</a> <em class="jxr_comment">// stopRow <= endKey (endKey is equals to or larger than stopRow)</em>
-<a class="jxr_linenumber" name="219" href="#219">219</a> <em class="jxr_comment">// This is a stop.</em>
-<a class="jxr_linenumber" name="220" href="#220">220</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="221" href="#221">221</a> }
-<a class="jxr_linenumber" name="222" href="#222">222</a> }
-<a class="jxr_linenumber" name="223" href="#223">223</a> <strong class="jxr_keyword">return</strong> false; <em class="jxr_comment">//unlikely.</em>
-<a class="jxr_linenumber" name="224" href="#224">224</a> }
-<a class="jxr_linenumber" name="225" href="#225">225</a>
-<a class="jxr_linenumber" name="226" href="#226">226</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> possiblyNextScanner(<strong class="jxr_keyword">int</strong> nbRows, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> done) <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="227" href="#227">227</a> <em class="jxr_comment">// If we have just switched replica, don't go to the next scanner yet. Rather, try</em>
-<a class="jxr_linenumber" name="228" href="#228">228</a> <em class="jxr_comment">// the scanner operations on the new replica, from the right point in the scan</em>
-<a class="jxr_linenumber" name="229" href="#229">229</a> <em class="jxr_comment">// Note that when we switched to a different replica we left it at a point</em>
-<a class="jxr_linenumber" name="230" href="#230">230</a> <em class="jxr_comment">// where we just did the "openScanner" with the appropriate startrow</em>
-<a class="jxr_linenumber" name="231" href="#231">231</a> <strong class="jxr_keyword">if</strong> (callable != <strong class="jxr_keyword">null</strong> && callable.switchedToADifferentReplica()) <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="232" href="#232">232</a> <strong class="jxr_keyword">return</strong> nextScanner(nbRows, done);
-<a class="jxr_linenumber" name="233" href="#233">233</a> }
-<a class="jxr_linenumber" name="234" href="#234">234</a>
-<a class="jxr_linenumber" name="235" href="#235">235</a> <em class="jxr_comment">/*</em>
-<a class="jxr_linenumber" name="236" href="#236">236</a> <em class="jxr_comment"> * Gets a scanner for the next region. If this.currentRegion != null, then</em>
-<a class="jxr_linenumber" name="237" href="#237">237</a> <em class="jxr_comment"> * we will move to the endrow of this.currentRegion. Else we will get</em>
-<a class="jxr_linenumber" name="238" href="#238">238</a> <em class="jxr_comment"> * scanner at the scan.getStartRow(). We will go no further, just tidy</em>
-<a class="jxr_linenumber" name="239" href="#239">239</a> <em class="jxr_comment"> * up outstanding scanners, if <code>currentRegion != null</code> and</em>
-<a class="jxr_linenumber" name="240" href="#240">240</a> <em class="jxr_comment"> * <code>done</code> is true.</em>
-<a class="jxr_linenumber" name="241" href="#241">241</a> <em class="jxr_comment"> * @param nbRows</em>
-<a class="jxr_linenumber" name="242" href="#242">242</a> <em class="jxr_comment"> * @param done Server-side says we're done scanning.</em>
-<a class="jxr_linenumber" name="243" href="#243">243</a> <em class="jxr_comment"> */</em>
-<a class="jxr_linenumber" name="244" href="#244">244</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> nextScanner(<strong class="jxr_keyword">int</strong> nbRows, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> done)
-<a class="jxr_linenumber" name="245" href="#245">245</a> <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="246" href="#246">246</a> <em class="jxr_comment">// Close the previous scanner if it's open</em>
-<a class="jxr_linenumber" name="247" href="#247">247</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.callable != <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="248" href="#248">248</a> <strong class="jxr_keyword">this</strong>.callable.setClose();
-<a class="jxr_linenumber" name="249" href="#249">249</a> call(callable, caller, scannerTimeout);
-<a class="jxr_linenumber" name="250" href="#250">250</a> <strong class="jxr_keyword">this</strong>.callable = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="251" href="#251">251</a> }
-<a class="jxr_linenumber" name="252" href="#252">252</a>
-<a class="jxr_linenumber" name="253" href="#253">253</a> <em class="jxr_comment">// Where to start the next scanner</em>
-<a class="jxr_linenumber" name="254" href="#254">254</a> byte [] localStartKey;
-<a class="jxr_linenumber" name="255" href="#255">255</a>
-<a class="jxr_linenumber" name="256" href="#256">256</a> <em class="jxr_comment">// if we're at end of table, close and return false to stop iterating</em>
-<a class="jxr_linenumber" name="257" href="#257">257</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.currentRegion != <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="258" href="#258">258</a> byte [] endKey = <strong class="jxr_keyword">this</strong>.currentRegion.getEndKey();
-<a class="jxr_linenumber" name="259" href="#259">259</a> <strong class="jxr_keyword">if</strong> (endKey == <strong class="jxr_keyword">null</strong> ||
-<a class="jxr_linenumber" name="260" href="#260">260</a> Bytes.equals(endKey, HConstants.EMPTY_BYTE_ARRAY) ||
-<a class="jxr_linenumber" name="261" href="#261">261</a> checkScanStopRow(endKey) ||
-<a class="jxr_linenumber" name="262" href="#262">262</a> done) {
-<a class="jxr_linenumber" name="263" href="#263">263</a> close();
-<a class="jxr_linenumber" name="264" href="#264">264</a> <strong class="jxr_keyword">if</strong> (LOG.isTraceEnabled()) {
-<a class="jxr_linenumber" name="265" href="#265">265</a> LOG.trace(<span class="jxr_string">"Finished "</span> + <strong class="jxr_keyword">this</strong>.currentRegion);
-<a class="jxr_linenumber" name="266" href="#266">266</a> }
-<a class="jxr_linenumber" name="267" href="#267">267</a> <strong class="jxr_keyword">return</strong> false;
-<a class="jxr_linenumber" name="268" href="#268">268</a> }
-<a class="jxr_linenumber" name="269" href="#269">269</a> localStartKey = endKey;
-<a class="jxr_linenumber" name="270" href="#270">270</a> <strong class="jxr_keyword">if</strong> (LOG.isTraceEnabled()) {
-<a class="jxr_linenumber" name="271" href="#271">271</a> LOG.trace(<span class="jxr_string">"Finished "</span> + <strong class="jxr_keyword">this</strong>.currentRegion);
-<a class="jxr_linenumber" name="272" href="#272">272</a> }
-<a class="jxr_linenumber" name="273" href="#273">273</a> } <strong class="jxr_keyword">else</strong> {
-<a class="jxr_linenumber" name="274" href="#274">274</a> localStartKey = <strong class="jxr_keyword">this</strong>.scan.getStartRow();
-<a class="jxr_linenumber" name="275" href="#275">275</a> }
-<a class="jxr_linenumber" name="276" href="#276">276</a>
-<a class="jxr_linenumber" name="277" href="#277">277</a> <strong class="jxr_keyword">if</strong> (LOG.isDebugEnabled() && <strong class="jxr_keyword">this</strong>.currentRegion != <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="278" href="#278">278</a> <em class="jxr_comment">// Only worth logging if NOT first region in scan.</em>
-<a class="jxr_linenumber" name="279" href="#279">279</a> LOG.debug(<span class="jxr_string">"Advancing internal scanner to startKey at '"</span> +
-<a class="jxr_linenumber" name="280" href="#280">280</a> Bytes.toStringBinary(localStartKey) + <span class="jxr_string">"'"</span>);
-<a class="jxr_linenumber" name="281" href="#281">281</a> }
-<a class="jxr_linenumber" name="282" href="#282">282</a> <strong class="jxr_keyword">try</strong> {
-<a class="jxr_linenumber" name="283" href="#283">283</a> callable = getScannerCallable(localStartKey, nbRows);
-<a class="jxr_linenumber" name="284" href="#284">284</a> <em class="jxr_comment">// Open a scanner on the region server starting at the</em>
-<a class="jxr_linenumber" name="285" href="#285">285</a> <em class="jxr_comment">// beginning of the region</em>
-<a class="jxr_linenumber" name="286" href="#286">286</a> call(callable, caller, scannerTimeout);
-<a class="jxr_linenumber" name="287" href="#287">287</a> <strong class="jxr_keyword">this</strong>.currentRegion = callable.getHRegionInfo();
-<a class="jxr_linenumber" name="288" href="#288">288</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.scanMetrics != <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="289" href="#289">289</a> <strong class="jxr_keyword">this</strong>.scanMetrics.countOfRegions.incrementAndGet();
-<a class="jxr_linenumber" name="290" href="#290">290</a> }
-<a class="jxr_linenumber" name="291" href="#291">291</a> } <strong class="jxr_keyword">catch</strong> (IOException e) {
-<a class="jxr_linenumber" name="292" href="#292">292</a> close();
-<a class="jxr_linenumber" name="293" href="#293">293</a> <strong class="jxr_keyword">throw</strong> e;
-<a class="jxr_linenumber" name="294" href="#294">294</a> }
-<a class="jxr_linenumber" name="295" href="#295">295</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="296" href="#296">296</a> }
-<a class="jxr_linenumber" name="297" href="#297">297</a>
-<a class="jxr_linenumber" name="298" href="#298">298</a> @VisibleForTesting
-<a class="jxr_linenumber" name="299" href="#299">299</a> <strong class="jxr_keyword">boolean</strong> isAnyRPCcancelled() {
-<a class="jxr_linenumber" name="300" href="#300">300</a> <strong class="jxr_keyword">return</strong> callable.isAnyRPCcancelled();
-<a class="jxr_linenumber" name="301" href="#301">301</a> }
+<a class="jxr_linenumber" name="210" href="#210">210</a> @VisibleForTesting
+<a class="jxr_linenumber" name="211" href="#211">211</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> getMaxResultSize() {
+<a class="jxr_linenumber" name="212" href="#212">212</a> <strong class="jxr_keyword">return</strong> maxScannerResultSize;
+<a class="jxr_linenumber" name="213" href="#213">213</a> }
+<a class="jxr_linenumber" name="214" href="#214">214</a>
+<a class="jxr_linenumber" name="215" href="#215">215</a> <em class="jxr_comment">// returns true if the passed region endKey</em>
+<a class="jxr_linenumber" name="216" href="#216">216</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> checkScanStopRow(<strong class="jxr_keyword">final</strong> byte [] endKey) {
+<a class="jxr_linenumber" name="217" href="#217">217</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.scan.getStopRow().length > 0) {
+<a class="jxr_linenumber" name="218" href="#218">218</a> <em class="jxr_comment">// there is a stop row, check to see if we are past it.</em>
+<a class="jxr_linenumber" name="219" href="#219">219</a> byte [] stopRow = scan.getStopRow();
+<a class="jxr_linenumber" name="220" href="#220">220</a> <strong class="jxr_keyword">int</strong> cmp = Bytes.compareTo(stopRow, 0, stopRow.length,
+<a class="jxr_linenumber" name="221" href="#221">221</a> endKey, 0, endKey.length);
+<a class="jxr_linenumber" name="222" href="#222">222</a> <strong class="jxr_keyword">if</strong> (cmp <= 0) {
+<a class="jxr_linenumber" name="223" href="#223">223</a> <em class="jxr_comment">// stopRow <= endKey (endKey is equals to or larger than stopRow)</em>
+<a class="jxr_linenumber" name="224" href="#224">224</a> <em class="jxr_comment">// This is a stop.</em>
+<a class="jxr_linenumber" name="225" href="#225">225</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="226" href="#226">226</a> }
+<a class="jxr_linenumber" name="227" href="#227">227</a> }
+<a class="jxr_linenumber" name="228" href="#228">228</a> <strong class="jxr_keyword">return</strong> false; <em class="jxr_comment">//unlikely.</em>
+<a class="jxr_linenumber" name="229" href="#229">229</a> }
+<a class="jxr_linenumber" name="230" href="#230">230</a>
+<a class="jxr_linenumber" name="231" href="#231">231</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> possiblyNextScanner(<strong class="jxr_keyword">int</strong> nbRows, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> done) <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="232" href="#232">232</a> <em class="jxr_comment">// If we have just switched replica, don't go to the next scanner yet. Rather, try</em>
+<a class="jxr_linenumber" name="233" href="#233">233</a> <em class="jxr_comment">// the scanner operations on the new replica, from the right point in the scan</em>
+<a class="jxr_linenumber" name="234" href="#234">234</a> <em class="jxr_comment">// Note that when we switched to a different replica we left it at a point</em>
+<a class="jxr_linenumber" name="235" href="#235">235</a> <em class="jxr_comment">// where we just did the "openScanner" with the appropriate startrow</em>
+<a class="jxr_linenumber" name="236" href="#236">236</a> <strong class="jxr_keyword">if</strong> (callable != <strong class="jxr_keyword">null</strong> && callable.switchedToADifferentReplica()) <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="237" href="#237">237</a> <strong class="jxr_keyword">return</strong> nextScanner(nbRows, done);
+<a class="jxr_linenumber" name="238" href="#238">238</a> }
+<a class="jxr_linenumber" name="239" href="#239">239</a>
+<a class="jxr_linenumber" name="240" href="#240">240</a> <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="241" href="#241">241</a> <em class="jxr_comment"> * Gets a scanner for the next region. If this.currentRegion != null, then</em>
+<a class="jxr_linenumber" name="242" href="#242">242</a> <em class="jxr_comment"> * we will move to the endrow of this.currentRegion. Else we will get</em>
+<a class="jxr_linenumber" name="243" href="#243">243</a> <em class="jxr_comment"> * scanner at the scan.getStartRow(). We will go no further, just tidy</em>
+<a class="jxr_linenumber" name="244" href="#244">244</a> <em class="jxr_comment"> * up outstanding scanners, if <code>currentRegion != null</code> and</em>
+<a class="jxr_linenumber" name="245" href="#245">245</a> <em class="jxr_comment"> * <code>done</code> is true.</em>
+<a class="jxr_linenumber" name="246" href="#246">246</a> <em class="jxr_comment"> * @param nbRows</em>
+<a class="jxr_linenumber" name="247" href="#247">247</a> <em class="jxr_comment"> * @param done Server-side says we're done scanning.</em>
+<a class="jxr_linenumber" name="248" href="#248">248</a> <em class="jxr_comment"> */</em>
+<a class="jxr_linenumber" name="249" href="#249">249</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> nextScanner(<strong class="jxr_keyword">int</strong> nbRows, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> done)
+<a class="jxr_linenumber" name="250" href="#250">250</a> <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="251" href="#251">251</a> <em class="jxr_comment">// Close the previous scanner if it's open</em>
+<a class="jxr_linenumber" name="252" href="#252">252</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.callable != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="253" href="#253">253</a> <strong class="jxr_keyword">this</strong>.callable.setClose();
+<a class="jxr_linenumber" name="254" href="#254">254</a> call(callable, caller, scannerTimeout);
+<a class="jxr_linenumber" name="255" href="#255">255</a> <strong class="jxr_keyword">this</strong>.callable = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="256" href="#256">256</a> }
+<a class="jxr_linenumber" name="257" href="#257">257</a>
+<a class="jxr_linenumber" name="258" href="#258">258</a> <em class="jxr_comment">// Where to start the next scanner</em>
+<a class="jxr_linenumber" name="259" href="#259">259</a> byte [] localStartKey;
+<a class="jxr_linenumber" name="260" href="#260">260</a>
+<a class="jxr_linenumber" name="261" href="#261">261</a> <em class="jxr_comment">// if we're at end of table, close and return false to stop iterating</em>
+<a class="jxr_linenumber" name="262" href="#262">262</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.currentRegion != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="263" href="#263">263</a> byte [] endKey = <strong class="jxr_keyword">this</strong>.currentRegion.getEndKey();
+<a class="jxr_linenumber" name="264" href="#264">264</a> <strong class="jxr_keyword">if</strong> (endKey == <strong class="jxr_keyword">null</strong> ||
+<a class="jxr_linenumber" name="265" href="#265">265</a> Bytes.equals(endKey, HConstants.EMPTY_BYTE_ARRAY) ||
+<a class="jxr_linenumber" name="266" href="#266">266</a> checkScanStopRow(endKey) ||
+<a class="jxr_linenumber" name="267" href="#267">267</a> done) {
+<a class="jxr_linenumber" name="268" href="#268">268</a> close();
+<a class="jxr_linenumber" name="269" href="#269">269</a> <strong class="jxr_keyword">if</strong> (LOG.isTraceEnabled()) {
+<a class="jxr_linenumber" name="270" href="#270">270</a> LOG.trace(<span class="jxr_string">"Finished "</span> + <strong class="jxr_keyword">this</strong>.currentRegion);
+<a class="jxr_linenumber" name="271" href="#271">271</a> }
+<a class="jxr_linenumber" name="272" href="#272">272</a> <strong class="jxr_keyword">return</strong> false;
+<a class="jxr_linenumber" name="273" href="#273">273</a> }
+<a class="jxr_linenumber" name="274" href="#274">274</a> localStartKey = endKey;
+<a class="jxr_linenumber" name="275" href="#275">275</a> <strong class="jxr_keyword">if</strong> (LOG.isTraceEnabled()) {
+<a class="jxr_linenumber" name="276" href="#276">276</a> LOG.trace(<span class="jxr_string">"Finished "</span> + <strong class="jxr_keyword">this</strong>.currentRegion);
+<a class="jxr_linenumber" name="277" href="#277">277</a> }
+<a class="jxr_linenumber" name="278" href="#278">278</a> } <strong class="jxr_keyword">else</strong> {
+<a class="jxr_linenumber" name="279" href="#279">279</a> localStartKey = <strong class="jxr_keyword">this</strong>.scan.getStartRow();
+<a class="jxr_linenumber" name="280" href="#280">280</a> }
+<a class="jxr_linenumber" name="281" href="#281">281</a>
+<a class="jxr_linenumber" name="282" href="#282">282</a> <strong class="jxr_keyword">if</strong> (LOG.isDebugEnabled() && <strong class="jxr_keyword">this</strong>.currentRegion != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="283" href="#283">283</a> <em class="jxr_comment">// Only worth logging if NOT first region in scan.</em>
+<a class="jxr_linenumber" name="284" href="#284">284</a> LOG.debug(<span class="jxr_string">"Advancing internal scanner to startKey at '"</span> +
+<a class="jxr_linenumber" name="285" href="#285">285</a> Bytes.toStringBinary(localStartKey) + <span class="jxr_string">"'"</span>);
+<a class="jxr_linenumber" name="286" href="#286">286</a> }
+<a class="jxr_linenumber" name="287" href="#287">287</a> <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="288" href="#288">288</a> callable = getScannerCallable(localStartKey, nbRows);
+<a class="jxr_linenumber" name="289" href="#289">289</a> <em class="jxr_comment">// Open a scanner on the region server starting at the</em>
+<a class="jxr_linenumber" name="290" href="#290">290</a> <em class="jxr_comment">// beginning of the region</em>
+<a class="jxr_linenumber" name="291" href="#291">291</a> call(callable, caller, scannerTimeout);
+<a class="jxr_linenumber" name="292" href="#292">292</a> <strong class="jxr_keyword">this</strong>.currentRegion = callable.getHRegionInfo();
+<a class="jxr_linenumber" name="293" href="#293">293</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.scanMetrics != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="294" href="#294">294</a> <strong class="jxr_keyword">this</strong>.scanMetrics.countOfRegions.incrementAndGet();
+<a class="jxr_linenumber" name="295" href="#295">295</a> }
+<a class="jxr_linenumber" name="296" href="#296">296</a> } <strong class="jxr_keyword">catch</strong> (IOException e) {
+<a class="jxr_linenumber" name="297" href="#297">297</a> close();
+<a class="jxr_linenumber" name="298" href="#298">298</a> <strong class="jxr_keyword">throw</strong> e;
+<a class="jxr_linenumber" name="299" href="#299">299</a> }
+<a class="jxr_linenumber" name="300" href="#300">300</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="301" href="#301">301</a> }
<a class="jxr_linenumber" name="302" href="#302">302</a>
-<a class="jxr_linenumber" name="303" href="#303">303</a> <a href="../../../../../org/apache/hadoop/hbase/client/Result.html">Result</a>[] call(<a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a> callable,
-<a class="jxr_linenumber" name="304" href="#304">304</a> RpcRetryingCaller<Result[]> caller, <strong class="jxr_keyword">int</strong> scannerTimeout)
-<a class="jxr_linenumber" name="305" href="#305">305</a> <strong class="jxr_keyword">throws</strong> IOException, RuntimeException {
-<a class="jxr_linenumber" name="306" href="#306">306</a> <strong class="jxr_keyword">if</strong> (Thread.interrupted()) {
-<a class="jxr_linenumber" name="307" href="#307">307</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> InterruptedIOException();
-<a class="jxr_linenumber" name="308" href="#308">308</a> }
-<a class="jxr_linenumber" name="309" href="#309">309</a> <em class="jxr_comment">// callWithoutRetries is at this layer. Within the ScannerCallableWithReplicas,</em>
-<a class="jxr_linenumber" name="310" href="#310">310</a> <em class="jxr_comment">// we do a callWithRetries</em>
-<a class="jxr_linenumber" name="311" href="#311">311</a> <strong class="jxr_keyword">return</strong> caller.callWithoutRetries(callable, scannerTimeout);
-<a class="jxr_linenumber" name="312" href="#312">312</a> }
-<a class="jxr_linenumber" name="313" href="#313">313</a>
-<a class="jxr_linenumber" name="314" href="#314">314</a> @InterfaceAudience.Private
-<a class="jxr_linenumber" name="315" href="#315">315</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a> getScannerCallable(byte [] localStartKey,
-<a class="jxr_linenumber" name="316" href="#316">316</a> <strong class="jxr_keyword">int</strong> nbRows) {
-<a class="jxr_linenumber" name="317" href="#317">317</a> scan.setStartRow(localStartKey);
-<a class="jxr_linenumber" name="318" href="#318">318</a> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallable.html">ScannerCallable</a> s =
-<a class="jxr_linenumber" name="319" href="#319">319</a> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallable.html">ScannerCallable</a>(getConnection(), getTable(), scan, <strong class="jxr_keyword">this</strong>.scanMetrics,
-<a class="jxr_linenumber" name="320" href="#320">320</a> <strong class="jxr_keyword">this</strong>.rpcControllerFactory);
-<a class="jxr_linenumber" name="321" href="#321">321</a> s.setCaching(nbRows);
-<a class="jxr_linenumber" name="322" href="#322">322</a> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a> sr = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a>(tableName, getConnection(),
-<a class="jxr_linenumber" name="323" href="#323">323</a> s, pool, primaryOperationTimeout, scan,
-<a class="jxr_linenumber" name="324" href="#324">324</a> retries, scannerTimeout, caching, conf, caller);
-<a class="jxr_linenumber" name="325" href="#325">325</a> <strong class="jxr_keyword">return</strong> sr;
-<a class="jxr_linenumber" name="326" href="#326">326</a> }
-<a class="jxr_linenumber" name="327" href="#327">327</a>
-<a class="jxr_linenumber" name="328" href="#328">328</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="329" href="#329">329</a> <em class="jxr_javadoccomment"> * Publish the scan metrics. For now, we use scan.setAttribute to pass the metrics back to the</em>
-<a class="jxr_linenumber" name="330" href="#330">330</a> <em class="jxr_javadoccomment"> * application or TableInputFormat.Later, we could push it to other systems. We don't use</em>
-<a class="jxr_linenumber" name="331" href="#331">331</a> <em class="jxr_javadoccomment"> * metrics framework because it doesn't support multi-instances of the same metrics on the same</em>
-<a class="jxr_linenumber" name="332" href="#332">332</a> <em class="jxr_javadoccomment"> * machine; for scan/map reduce scenarios, we will have multiple scans running at the same time.</em>
-<a class="jxr_linenumber" name="333" href="#333">333</a> <em class="jxr_javadoccomment"> *</em>
-<a class="jxr_linenumber" name="334" href="#334">334</a> <em class="jxr_javadoccomment"> * By default, scan metrics are disabled; if the application wants to collect them, this</em>
-<a class="jxr_linenumber" name="335" href="#335">335</a> <em class="jxr_javadoccomment"> * behavior can be turned on by calling calling {@link Scan#setScanMetricsEnabled(boolean)}</em>
-<a class="jxr_linenumber" name="336" href="#336">336</a> <em class="jxr_javadoccomment"> *</em>
-<a class="jxr_linenumber" name="337" href="#337">337</a> <em class="jxr_javadoccomment"> * <p>This invocation clears the scan metrics. Metrics are aggregated in the Scan instance.</em>
-<a class="jxr_linenumber" name="338" href="#338">338</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="339" href="#339">339</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> writeScanMetrics() {
-<a class="jxr_linenumber" name="340" href="#340">340</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.scanMetrics == <strong class="jxr_keyword">null</strong> || scanMetricsPublished) {
-<a class="jxr_linenumber" name="341" href="#341">341</a> <strong class="jxr_keyword">return</strong>;
-<a class="jxr_linenumber" name="342" href="#342">342</a> }
-<a class="jxr_linenumber" name="343" href="#343">343</a> MapReduceProtos.ScanMetrics pScanMetrics = ProtobufUtil.toScanMetrics(scanMetrics);
-<a class="jxr_linenumber" name="344" href="#344">344</a> scan.setAttribute(Scan.SCAN_ATTRIBUTES_METRICS_DATA, pScanMetrics.toByteArray());
-<a class="jxr_linenumber" name="345" href="#345">345</a> scanMetricsPublished = <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="346" href="#346">346</a> }
-<a class="jxr_linenumber" name="347" href="#347">347</a>
-<a class="jxr_linenumber" name="348" href="#348">348</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> initSyncCache() {
-<a class="jxr_linenumber" name="349" href="#349">349</a> cache = <strong class="jxr_keyword">new</strong> LinkedList<Result>();
-<a class="jxr_linenumber" name="350" href="#350">350</a> }
-<a class="jxr_linenumber" name="351" href="#351">351</a>
-<a class="jxr_linenumber" name="352" href="#352">352</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/Result.html">Result</a> nextWithSyncCache() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="353" href="#353">353</a> <em class="jxr_comment">// If the scanner is closed and there's nothing left in the cache, next is a no-op.</em>
-<a class="jxr_linenumber" name="354" href="#354">354</a> <strong class="jxr_keyword">if</strong> (cache.size() == 0 && <strong class="jxr_keyword">this</strong>.closed) {
-<a class="jxr_linenumber" name="355" href="#355">355</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="356" href="#356">356</a> }
-<a class="jxr_linenumber" name="357" href="#357">357</a> <strong class="jxr_keyword">if</strong> (cache.size() == 0) {
-<a class="jxr_linenumber" name="358" href="#358">358</a> loadCache();
-<a class="jxr_linenumber" name="359" href="#359">359</a> }
-<a class="jxr_linenumber" name="360" href="#360">360</a>
-<a class="jxr_linenumber" name="361" href="#361">361</a> <strong class="jxr_keyword">if</strong> (cache.size() > 0) {
-<a class="jxr_linenumber" name="362" href="#362">362</a> <strong class="jxr_keyword">return</strong> cache.poll();
-<a class="jxr_linenumber" name="363" href="#363">363</a> }
-<a class="jxr_linenumber" name="364" href="#364">364</a>
-<a class="jxr_linenumber" name="365" href="#365">365</a> <em class="jxr_comment">// if we exhausted this scanner before calling close, write out the scan metrics</em>
-<a class="jxr_linenumber" name="366" href="#366">366</a> writeScanMetrics();
-<a class="jxr_linenumber" name="367" href="#367">367</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="368" href="#368">368</a> }
+<a class="jxr_linenumber" name="303" href="#303">303</a> @VisibleForTesting
+<a class="jxr_linenumber" name="304" href="#304">304</a> <strong class="jxr_keyword">boolean</strong> isAnyRPCcancelled() {
+<a class="jxr_linenumber" name="305" href="#305">305</a> <strong class="jxr_keyword">return</strong> callable.isAnyRPCcancelled();
+<a class="jxr_linenumber" name="306" href="#306">306</a> }
+<a class="jxr_linenumber" name="307" href="#307">307</a>
+<a class="jxr_linenumber" name="308" href="#308">308</a> <a href="../../../../../org/apache/hadoop/hbase/client/Result.html">Result</a>[] call(<a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a> callable,
+<a class="jxr_linenumber" name="309" href="#309">309</a> RpcRetryingCaller<Result[]> caller, <strong class="jxr_keyword">int</strong> scannerTimeout)
+<a class="jxr_linenumber" name="310" href="#310">310</a> <strong class="jxr_keyword">throws</strong> IOException, RuntimeException {
+<a class="jxr_linenumber" name="311" href="#311">311</a> <strong class="jxr_keyword">if</strong> (Thread.interrupted()) {
+<a class="jxr_linenumber" name="312" href="#312">312</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> InterruptedIOException();
+<a class="jxr_linenumber" name="313" href="#313">313</a> }
+<a class="jxr_linenumber" name="314" href="#314">314</a> <em class="jxr_comment">// callWithoutRetries is at this layer. Within the ScannerCallableWithReplicas,</em>
+<a class="jxr_linenumber" name="315" href="#315">315</a> <em class="jxr_comment">// we do a callWithRetries</em>
+<a class="jxr_linenumber" name="316" href="#316">316</a> <strong class="jxr_keyword">return</strong> caller.callWithoutRetries(callable, scannerTimeout);
+<a class="jxr_linenumber" name="317" href="#317">317</a> }
+<a class="jxr_linenumber" name="318" href="#318">318</a>
+<a class="jxr_linenumber" name="319" href="#319">319</a> @InterfaceAudience.Private
+<a class="jxr_linenumber" name="320" href="#320">320</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a> getScannerCallable(byte [] localStartKey,
+<a class="jxr_linenumber" name="321" href="#321">321</a> <strong class="jxr_keyword">int</strong> nbRows) {
+<a class="jxr_linenumber" name="322" href="#322">322</a> scan.setStartRow(localStartKey);
+<a class="jxr_linenumber" name="323" href="#323">323</a> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallable.html">ScannerCallable</a> s =
+<a class="jxr_linenumber" name="324" href="#324">324</a> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallable.html">ScannerCallable</a>(getConnection(), getTable(), scan, <strong class="jxr_keyword">this</strong>.scanMetrics,
+<a class="jxr_linenumber" name="325" href="#325">325</a> <strong class="jxr_keyword">this</strong>.rpcControllerFactory);
+<a class="jxr_linenumber" name="326" href="#326">326</a> s.setCaching(nbRows);
+<a class="jxr_linenumber" name="327" href="#327">327</a> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a> sr = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.html">ScannerCallableWithReplicas</a>(tableName, getConnection(),
+<a class="jxr_linenumber" name="328" href="#328">328</a> s, pool, primaryOperationTimeout, scan,
+<a class="jxr_linenumber" name="329" href="#329">329</a> retries, scannerTimeout, caching, conf, caller);
+<a class="jxr_linenumber" name="330" href="#330">330</a> <strong class="jxr_keyword">return</strong> sr;
+<a class="jxr_linenumber" name="331" href="#331">331</a> }
+<a class="jxr_linenumber" name="332" href="#332">332</a>
+<a class="jxr_linenumber" name="333" href="#333">333</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="334" href="#334">334</a> <em class="jxr_javadoccomment"> * Publish the scan metrics. For now, we use scan.setAttribute to pass the metrics back to the</em>
+<a class="jxr_linenumber" name="335" href="#335">335</a> <em class="jxr_javadoccomment"> * application or TableInputFormat.Later, we could push it to other systems. We don't use</em>
+<a
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