You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by mi...@apache.org on 2016/02/04 18:31:25 UTC
[05/23] hbase-site git commit: Published site at
2cf8af5bf1d501156cbb3b421cf75c1051ead7d9.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/32672884/testdevapidocs/org/apache/hadoop/hbase/io/hfile/package-tree.html
----------------------------------------------------------------------
diff --git a/testdevapidocs/org/apache/hadoop/hbase/io/hfile/package-tree.html b/testdevapidocs/org/apache/hadoop/hbase/io/hfile/package-tree.html
index aeec2af..149878b 100644
--- a/testdevapidocs/org/apache/hadoop/hbase/io/hfile/package-tree.html
+++ b/testdevapidocs/org/apache/hadoop/hbase/io/hfile/package-tree.html
@@ -156,9 +156,9 @@
<ul>
<li type="circle">java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang"><span class="strong">Enum</span></a><E> (implements java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a><T>, java.io.<a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>)
<ul>
+<li type="circle">org.apache.hadoop.hbase.io.hfile.<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/TagUsage.html" title="enum in org.apache.hadoop.hbase.io.hfile"><span class="strong">TagUsage</span></a></li>
<li type="circle">org.apache.hadoop.hbase.io.hfile.<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/TestHFileBlockCompatibility.Writer.State.html" title="enum in org.apache.hadoop.hbase.io.hfile"><span class="strong">TestHFileBlockCompatibility.Writer.State</span></a></li>
<li type="circle">org.apache.hadoop.hbase.io.hfile.<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/TestCacheOnWrite.CacheOnWriteType.html" title="enum in org.apache.hadoop.hbase.io.hfile"><span class="strong">TestCacheOnWrite.CacheOnWriteType</span></a></li>
-<li type="circle">org.apache.hadoop.hbase.io.hfile.<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/TagUsage.html" title="enum in org.apache.hadoop.hbase.io.hfile"><span class="strong">TagUsage</span></a></li>
</ul>
</li>
</ul>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/32672884/testdevapidocs/org/apache/hadoop/hbase/package-tree.html
----------------------------------------------------------------------
diff --git a/testdevapidocs/org/apache/hadoop/hbase/package-tree.html b/testdevapidocs/org/apache/hadoop/hbase/package-tree.html
index eb03253..294e9be 100644
--- a/testdevapidocs/org/apache/hadoop/hbase/package-tree.html
+++ b/testdevapidocs/org/apache/hadoop/hbase/package-tree.html
@@ -506,15 +506,15 @@
<ul>
<li type="circle">java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang"><span class="strong">Enum</span></a><E> (implements java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a><T>, java.io.<a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>)
<ul>
-<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/PerformanceEvaluation.Counter.html" title="enum in org.apache.hadoop.hbase"><span class="strong">PerformanceEvaluation.Counter</span></a></li>
-<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/ScanPerformanceEvaluation.ScanCounter.html" title="enum in org.apache.hadoop.hbase"><span class="strong">ScanPerformanceEvaluation.ScanCounter</span></a></li>
-<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/IntegrationTestRegionReplicaPerf.Stat.html" title="enum in org.apache.hadoop.hbase"><span class="strong">IntegrationTestRegionReplicaPerf.Stat</span></a></li>
-<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/HBaseClusterManager.CommandProvider.Operation.html" title="enum in org.apache.hadoop.hbase"><span class="strong">HBaseClusterManager.CommandProvider.Operation</span></a></li>
<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/IntegrationTestDDLMasterFailover.ACTION.html" title="enum in org.apache.hadoop.hbase"><span class="strong">IntegrationTestDDLMasterFailover.ACTION</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/RESTApiClusterManager.RoleCommand.html" title="enum in org.apache.hadoop.hbase"><span class="strong">RESTApiClusterManager.RoleCommand</span></a></li>
<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/RESTApiClusterManager.Service.html" title="enum in org.apache.hadoop.hbase"><span class="strong">RESTApiClusterManager.Service</span></a></li>
-<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/ClusterManager.ServiceType.html" title="enum in org.apache.hadoop.hbase"><span class="strong">ClusterManager.ServiceType</span></a></li>
<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/ResourceChecker.Phase.html" title="enum in org.apache.hadoop.hbase"><span class="strong">ResourceChecker.Phase</span></a></li>
-<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/RESTApiClusterManager.RoleCommand.html" title="enum in org.apache.hadoop.hbase"><span class="strong">RESTApiClusterManager.RoleCommand</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/IntegrationTestRegionReplicaPerf.Stat.html" title="enum in org.apache.hadoop.hbase"><span class="strong">IntegrationTestRegionReplicaPerf.Stat</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/ScanPerformanceEvaluation.ScanCounter.html" title="enum in org.apache.hadoop.hbase"><span class="strong">ScanPerformanceEvaluation.ScanCounter</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/HBaseClusterManager.CommandProvider.Operation.html" title="enum in org.apache.hadoop.hbase"><span class="strong">HBaseClusterManager.CommandProvider.Operation</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/PerformanceEvaluation.Counter.html" title="enum in org.apache.hadoop.hbase"><span class="strong">PerformanceEvaluation.Counter</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.<a href="../../../../org/apache/hadoop/hbase/ClusterManager.ServiceType.html" title="enum in org.apache.hadoop.hbase"><span class="strong">ClusterManager.ServiceType</span></a></li>
</ul>
</li>
</ul>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/32672884/testdevapidocs/org/apache/hadoop/hbase/procedure2/package-tree.html
----------------------------------------------------------------------
diff --git a/testdevapidocs/org/apache/hadoop/hbase/procedure2/package-tree.html b/testdevapidocs/org/apache/hadoop/hbase/procedure2/package-tree.html
index b6de721..f45510d 100644
--- a/testdevapidocs/org/apache/hadoop/hbase/procedure2/package-tree.html
+++ b/testdevapidocs/org/apache/hadoop/hbase/procedure2/package-tree.html
@@ -145,8 +145,8 @@
<ul>
<li type="circle">java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang"><span class="strong">Enum</span></a><E> (implements java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a><T>, java.io.<a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>)
<ul>
-<li type="circle">org.apache.hadoop.hbase.procedure2.<a href="../../../../../org/apache/hadoop/hbase/procedure2/TestProcedureRecovery.TestStateMachineProcedure.State.html" title="enum in org.apache.hadoop.hbase.procedure2"><span class="strong">TestProcedureRecovery.TestStateMachineProcedure.State</span></a></li>
<li type="circle">org.apache.hadoop.hbase.procedure2.<a href="../../../../../org/apache/hadoop/hbase/procedure2/TestYieldProcedures.TestStateMachineProcedure.State.html" title="enum in org.apache.hadoop.hbase.procedure2"><span class="strong">TestYieldProcedures.TestStateMachineProcedure.State</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.procedure2.<a href="../../../../../org/apache/hadoop/hbase/procedure2/TestProcedureRecovery.TestStateMachineProcedure.State.html" title="enum in org.apache.hadoop.hbase.procedure2"><span class="strong">TestProcedureRecovery.TestStateMachineProcedure.State</span></a></li>
</ul>
</li>
</ul>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/32672884/testdevapidocs/org/apache/hadoop/hbase/regionserver/package-tree.html
----------------------------------------------------------------------
diff --git a/testdevapidocs/org/apache/hadoop/hbase/regionserver/package-tree.html b/testdevapidocs/org/apache/hadoop/hbase/regionserver/package-tree.html
index 300903a..d424d9d 100644
--- a/testdevapidocs/org/apache/hadoop/hbase/regionserver/package-tree.html
+++ b/testdevapidocs/org/apache/hadoop/hbase/regionserver/package-tree.html
@@ -545,8 +545,8 @@
<li type="circle">java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang"><span class="strong">Enum</span></a><E> (implements java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a><T>, java.io.<a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>)
<ul>
<li type="circle">org.apache.hadoop.hbase.regionserver.<a href="../../../../../org/apache/hadoop/hbase/regionserver/DataBlockEncodingTool.Manipulation.html" title="enum in org.apache.hadoop.hbase.regionserver"><span class="strong">DataBlockEncodingTool.Manipulation</span></a></li>
-<li type="circle">org.apache.hadoop.hbase.regionserver.<a href="../../../../../org/apache/hadoop/hbase/regionserver/TestAtomicOperation.TestStep.html" title="enum in org.apache.hadoop.hbase.regionserver"><span class="strong">TestAtomicOperation.TestStep</span></a></li>
<li type="circle">org.apache.hadoop.hbase.regionserver.<a href="../../../../../org/apache/hadoop/hbase/regionserver/TestCacheOnWriteInSchema.CacheOnWriteType.html" title="enum in org.apache.hadoop.hbase.regionserver"><span class="strong">TestCacheOnWriteInSchema.CacheOnWriteType</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.regionserver.<a href="../../../../../org/apache/hadoop/hbase/regionserver/TestAtomicOperation.TestStep.html" title="enum in org.apache.hadoop.hbase.regionserver"><span class="strong">TestAtomicOperation.TestStep</span></a></li>
</ul>
</li>
</ul>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/32672884/testdevapidocs/org/apache/hadoop/hbase/test/package-tree.html
----------------------------------------------------------------------
diff --git a/testdevapidocs/org/apache/hadoop/hbase/test/package-tree.html b/testdevapidocs/org/apache/hadoop/hbase/test/package-tree.html
index 52b2b91..9714a69 100644
--- a/testdevapidocs/org/apache/hadoop/hbase/test/package-tree.html
+++ b/testdevapidocs/org/apache/hadoop/hbase/test/package-tree.html
@@ -235,8 +235,8 @@
<li type="circle">java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang"><span class="strong">Enum</span></a><E> (implements java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a><T>, java.io.<a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>)
<ul>
<li type="circle">org.apache.hadoop.hbase.test.<a href="../../../../../org/apache/hadoop/hbase/test/IntegrationTestBigLinkedList.Verify.Counts.html" title="enum in org.apache.hadoop.hbase.test"><span class="strong">IntegrationTestBigLinkedList.Verify.Counts</span></a></li>
-<li type="circle">org.apache.hadoop.hbase.test.<a href="../../../../../org/apache/hadoop/hbase/test/IntegrationTestLoadAndVerify.Counters.html" title="enum in org.apache.hadoop.hbase.test"><span class="strong">IntegrationTestLoadAndVerify.Counters</span></a></li>
<li type="circle">org.apache.hadoop.hbase.test.<a href="../../../../../org/apache/hadoop/hbase/test/IntegrationTestWithCellVisibilityLoadAndVerify.Counters.html" title="enum in org.apache.hadoop.hbase.test"><span class="strong">IntegrationTestWithCellVisibilityLoadAndVerify.Counters</span></a></li>
+<li type="circle">org.apache.hadoop.hbase.test.<a href="../../../../../org/apache/hadoop/hbase/test/IntegrationTestLoadAndVerify.Counters.html" title="enum in org.apache.hadoop.hbase.test"><span class="strong">IntegrationTestLoadAndVerify.Counters</span></a></li>
</ul>
</li>
</ul>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/32672884/xref/org/apache/hadoop/hbase/io/hfile/ChecksumUtil.html
----------------------------------------------------------------------
diff --git a/xref/org/apache/hadoop/hbase/io/hfile/ChecksumUtil.html b/xref/org/apache/hadoop/hbase/io/hfile/ChecksumUtil.html
index 902ad67..2212783 100644
--- a/xref/org/apache/hadoop/hbase/io/hfile/ChecksumUtil.html
+++ b/xref/org/apache/hadoop/hbase/io/hfile/ChecksumUtil.html
@@ -35,172 +35,170 @@
<a class="jxr_linenumber" name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.apache.commons.logging.LogFactory;
<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.fs.ChecksumException;
<a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.classification.InterfaceAudience;
-<a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.fs.Path;
-<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.ChecksumType;
-<a class="jxr_linenumber" name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.util.DataChecksum;
-<a class="jxr_linenumber" name="31" href="#31">31</a>
-<a class="jxr_linenumber" name="32" href="#32">32</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * Utility methods to compute and validate checksums.</em>
-<a class="jxr_linenumber" name="34" href="#34">34</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="35" href="#35">35</a> @InterfaceAudience.Private
-<a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/ChecksumUtil.html">ChecksumUtil</a> {
-<a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(ChecksumUtil.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="38" href="#38">38</a>
-<a class="jxr_linenumber" name="39" href="#39">39</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> This is used to reserve space in a byte buffer */</em>
-<a class="jxr_linenumber" name="40" href="#40">40</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> byte[] DUMMY_VALUE = <strong class="jxr_keyword">new</strong> byte[128 * HFileBlock.CHECKSUM_SIZE];
-<a class="jxr_linenumber" name="41" href="#41">41</a>
-<a class="jxr_linenumber" name="42" href="#42">42</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> </em>
-<a class="jxr_linenumber" name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * This is used by unit tests to make checksum failures throw an </em>
-<a class="jxr_linenumber" name="44" href="#44">44</a> <em class="jxr_javadoccomment"> * exception instead of returning null. Returning a null value from </em>
-<a class="jxr_linenumber" name="45" href="#45">45</a> <em class="jxr_javadoccomment"> * checksum validation will cause the higher layer to retry that </em>
-<a class="jxr_linenumber" name="46" href="#46">46</a> <em class="jxr_javadoccomment"> * read with hdfs-level checksums. Instead, we would like checksum </em>
-<a class="jxr_linenumber" name="47" href="#47">47</a> <em class="jxr_javadoccomment"> * failures to cause the entire unit test to fail.</em>
-<a class="jxr_linenumber" name="48" href="#48">48</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="49" href="#49">49</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> generateExceptions = false;
-<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"> * Generates a checksum for all the data in indata. The checksum is</em>
-<a class="jxr_linenumber" name="53" href="#53">53</a> <em class="jxr_javadoccomment"> * written to outdata.</em>
-<a class="jxr_linenumber" name="54" href="#54">54</a> <em class="jxr_javadoccomment"> * @param indata input data stream</em>
-<a class="jxr_linenumber" name="55" href="#55">55</a> <em class="jxr_javadoccomment"> * @param startOffset starting offset in the indata stream from where to</em>
-<a class="jxr_linenumber" name="56" href="#56">56</a> <em class="jxr_javadoccomment"> * compute checkums from</em>
-<a class="jxr_linenumber" name="57" href="#57">57</a> <em class="jxr_javadoccomment"> * @param endOffset ending offset in the indata stream upto</em>
-<a class="jxr_linenumber" name="58" href="#58">58</a> <em class="jxr_javadoccomment"> * which checksums needs to be computed</em>
-<a class="jxr_linenumber" name="59" href="#59">59</a> <em class="jxr_javadoccomment"> * @param outdata the output buffer where checksum values are written</em>
-<a class="jxr_linenumber" name="60" href="#60">60</a> <em class="jxr_javadoccomment"> * @param outOffset the starting offset in the outdata where the</em>
-<a class="jxr_linenumber" name="61" href="#61">61</a> <em class="jxr_javadoccomment"> * checksum values are written</em>
-<a class="jxr_linenumber" name="62" href="#62">62</a> <em class="jxr_javadoccomment"> * @param checksumType type of checksum</em>
-<a class="jxr_linenumber" name="63" href="#63">63</a> <em class="jxr_javadoccomment"> * @param bytesPerChecksum number of bytes per checksum value</em>
-<a class="jxr_linenumber" name="64" href="#64">64</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="65" href="#65">65</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> generateChecksums(byte[] indata, <strong class="jxr_keyword">int</strong> startOffset, <strong class="jxr_keyword">int</strong> endOffset,
-<a class="jxr_linenumber" name="66" href="#66">66</a> byte[] outdata, <strong class="jxr_keyword">int</strong> outOffset, <a href="../../../../../../org/apache/hadoop/hbase/util/ChecksumType.html">ChecksumType</a> checksumType,
-<a class="jxr_linenumber" name="67" href="#67">67</a> <strong class="jxr_keyword">int</strong> bytesPerChecksum) <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="68" href="#68">68</a>
-<a class="jxr_linenumber" name="69" href="#69">69</a> <strong class="jxr_keyword">if</strong> (checksumType == ChecksumType.NULL) {
-<a class="jxr_linenumber" name="70" href="#70">70</a> <strong class="jxr_keyword">return</strong>; <em class="jxr_comment">// No checksum for this block.</em>
-<a class="jxr_linenumber" name="71" href="#71">71</a> }
-<a class="jxr_linenumber" name="72" href="#72">72</a>
-<a class="jxr_linenumber" name="73" href="#73">73</a> DataChecksum checksum = DataChecksum.newDataChecksum(
-<a class="jxr_linenumber" name="74" href="#74">74</a> checksumType.getDataChecksumType(), bytesPerChecksum);
-<a class="jxr_linenumber" name="75" href="#75">75</a>
-<a class="jxr_linenumber" name="76" href="#76">76</a> checksum.calculateChunkedSums(
-<a class="jxr_linenumber" name="77" href="#77">77</a> ByteBuffer.wrap(indata, startOffset, endOffset - startOffset),
-<a class="jxr_linenumber" name="78" href="#78">78</a> ByteBuffer.wrap(outdata, outOffset, outdata.length - outOffset));
-<a class="jxr_linenumber" name="79" href="#79">79</a> }
-<a class="jxr_linenumber" name="80" href="#80">80</a>
-<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"> * Validates that the data in the specified HFileBlock matches the</em>
-<a class="jxr_linenumber" name="83" href="#83">83</a> <em class="jxr_javadoccomment"> * checksum. Generates the checksum for the data and</em>
-<a class="jxr_linenumber" name="84" href="#84">84</a> <em class="jxr_javadoccomment"> * then validate that it matches the value stored in the header.</em>
-<a class="jxr_linenumber" name="85" href="#85">85</a> <em class="jxr_javadoccomment"> * If there is a checksum mismatch, then return false. Otherwise</em>
-<a class="jxr_linenumber" name="86" href="#86">86</a> <em class="jxr_javadoccomment"> * return true.</em>
-<a class="jxr_linenumber" name="87" href="#87">87</a> <em class="jxr_javadoccomment"> * The header is extracted from the specified HFileBlock while the</em>
-<a class="jxr_linenumber" name="88" href="#88">88</a> <em class="jxr_javadoccomment"> * data-to-be-verified is extracted from 'data'.</em>
-<a class="jxr_linenumber" name="89" href="#89">89</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="90" href="#90">90</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> validateBlockChecksum(Path path, <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/HFileBlock.html">HFileBlock</a> block,
-<a class="jxr_linenumber" name="91" href="#91">91</a> byte[] data, <strong class="jxr_keyword">int</strong> hdrSize) <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="92" href="#92">92</a>
-<a class="jxr_linenumber" name="93" href="#93">93</a> <em class="jxr_comment">// If this is an older version of the block that does not have</em>
-<a class="jxr_linenumber" name="94" href="#94">94</a> <em class="jxr_comment">// checksums, then return false indicating that checksum verification</em>
-<a class="jxr_linenumber" name="95" href="#95">95</a> <em class="jxr_comment">// did not succeed. Actually, this methiod should never be called</em>
-<a class="jxr_linenumber" name="96" href="#96">96</a> <em class="jxr_comment">// when the minorVersion is 0, thus this is a defensive check for a</em>
-<a class="jxr_linenumber" name="97" href="#97">97</a> <em class="jxr_comment">// cannot-happen case. Since this is a cannot-happen case, it is</em>
-<a class="jxr_linenumber" name="98" href="#98">98</a> <em class="jxr_comment">// better to return false to indicate a checksum validation failure.</em>
-<a class="jxr_linenumber" name="99" href="#99">99</a> <strong class="jxr_keyword">if</strong> (!block.getHFileContext().isUseHBaseChecksum()) {
-<a class="jxr_linenumber" name="100" href="#100">100</a> <strong class="jxr_keyword">return</strong> false;
-<a class="jxr_linenumber" name="101" href="#101">101</a> }
-<a class="jxr_linenumber" name="102" href="#102">102</a>
-<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_comment">// Get a checksum object based on the type of checksum that is</em>
-<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_comment">// set in the HFileBlock header. A ChecksumType.NULL indicates that </em>
-<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_comment">// the caller is not interested in validating checksums, so we</em>
-<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_comment">// always return true.</em>
-<a class="jxr_linenumber" name="107" href="#107">107</a> <a href="../../../../../../org/apache/hadoop/hbase/util/ChecksumType.html">ChecksumType</a> cktype = ChecksumType.codeToType(block.getChecksumType());
-<a class="jxr_linenumber" name="108" href="#108">108</a> <strong class="jxr_keyword">if</strong> (cktype == ChecksumType.NULL) {
-<a class="jxr_linenumber" name="109" href="#109">109</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>; <em class="jxr_comment">// No checksum validations needed for this block.</em>
-<a class="jxr_linenumber" name="110" href="#110">110</a> }
-<a class="jxr_linenumber" name="111" href="#111">111</a>
-<a class="jxr_linenumber" name="112" href="#112">112</a> <em class="jxr_comment">// read in the stored value of the checksum size from the header.</em>
-<a class="jxr_linenumber" name="113" href="#113">113</a> <strong class="jxr_keyword">int</strong> bytesPerChecksum = block.getBytesPerChecksum();
-<a class="jxr_linenumber" name="114" href="#114">114</a>
-<a class="jxr_linenumber" name="115" href="#115">115</a> DataChecksum dataChecksum = DataChecksum.newDataChecksum(
-<a class="jxr_linenumber" name="116" href="#116">116</a> cktype.getDataChecksumType(), bytesPerChecksum);
-<a class="jxr_linenumber" name="117" href="#117">117</a> assert dataChecksum != <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="118" href="#118">118</a> <strong class="jxr_keyword">int</strong> sizeWithHeader = block.getOnDiskDataSizeWithHeader();
-<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.info(<span class="jxr_string">"length of data = "</span> + data.length
-<a class="jxr_linenumber" name="121" href="#121">121</a> + <span class="jxr_string">" OnDiskDataSizeWithHeader = "</span> + sizeWithHeader
-<a class="jxr_linenumber" name="122" href="#122">122</a> + <span class="jxr_string">" checksum type = "</span> + cktype.getName()
-<a class="jxr_linenumber" name="123" href="#123">123</a> + <span class="jxr_string">" file ="</span> + path.toString()
-<a class="jxr_linenumber" name="124" href="#124">124</a> + <span class="jxr_string">" header size = "</span> + hdrSize
-<a class="jxr_linenumber" name="125" href="#125">125</a> + <span class="jxr_string">" bytesPerChecksum = "</span> + bytesPerChecksum);
-<a class="jxr_linenumber" name="126" href="#126">126</a> }
-<a class="jxr_linenumber" name="127" href="#127">127</a> <strong class="jxr_keyword">try</strong> {
-<a class="jxr_linenumber" name="128" href="#128">128</a> dataChecksum.verifyChunkedSums(ByteBuffer.wrap(data, 0, sizeWithHeader),
-<a class="jxr_linenumber" name="129" href="#129">129</a> ByteBuffer.wrap(data, sizeWithHeader, data.length - sizeWithHeader),
-<a class="jxr_linenumber" name="130" href="#130">130</a> path.toString(), 0);
-<a class="jxr_linenumber" name="131" href="#131">131</a> } <strong class="jxr_keyword">catch</strong> (ChecksumException e) {
-<a class="jxr_linenumber" name="132" href="#132">132</a> <strong class="jxr_keyword">return</strong> false;
-<a class="jxr_linenumber" name="133" href="#133">133</a> }
-<a class="jxr_linenumber" name="134" href="#134">134</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>; <em class="jxr_comment">// checksum is valid</em>
-<a class="jxr_linenumber" name="135" href="#135">135</a> }
-<a class="jxr_linenumber" name="136" href="#136">136</a>
-<a class="jxr_linenumber" name="137" href="#137">137</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_javadoccomment"> * Returns the number of bytes needed to store the checksums for</em>
-<a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_javadoccomment"> * a specified data size</em>
-<a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_javadoccomment"> * @param datasize number of bytes of data</em>
-<a class="jxr_linenumber" name="141" href="#141">141</a> <em class="jxr_javadoccomment"> * @param bytesPerChecksum number of bytes in a checksum chunk</em>
-<a class="jxr_linenumber" name="142" href="#142">142</a> <em class="jxr_javadoccomment"> * @return The number of bytes needed to store the checksum values</em>
-<a class="jxr_linenumber" name="143" href="#143">143</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="144" href="#144">144</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">long</strong> numBytes(<strong class="jxr_keyword">long</strong> datasize, <strong class="jxr_keyword">int</strong> bytesPerChecksum) {
-<a class="jxr_linenumber" name="145" href="#145">145</a> <strong class="jxr_keyword">return</strong> numChunks(datasize, bytesPerChecksum) *
-<a class="jxr_linenumber" name="146" href="#146">146</a> HFileBlock.CHECKSUM_SIZE;
-<a class="jxr_linenumber" name="147" href="#147">147</a> }
-<a class="jxr_linenumber" name="148" href="#148">148</a>
-<a class="jxr_linenumber" name="149" href="#149">149</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="150" href="#150">150</a> <em class="jxr_javadoccomment"> * Returns the number of checksum chunks needed to store the checksums for</em>
-<a class="jxr_linenumber" name="151" href="#151">151</a> <em class="jxr_javadoccomment"> * a specified data size</em>
-<a class="jxr_linenumber" name="152" href="#152">152</a> <em class="jxr_javadoccomment"> * @param datasize number of bytes of data</em>
-<a class="jxr_linenumber" name="153" href="#153">153</a> <em class="jxr_javadoccomment"> * @param bytesPerChecksum number of bytes in a checksum chunk</em>
-<a class="jxr_linenumber" name="154" href="#154">154</a> <em class="jxr_javadoccomment"> * @return The number of checksum chunks</em>
-<a class="jxr_linenumber" name="155" href="#155">155</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="156" href="#156">156</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">long</strong> numChunks(<strong class="jxr_keyword">long</strong> datasize, <strong class="jxr_keyword">int</strong> bytesPerChecksum) {
-<a class="jxr_linenumber" name="157" href="#157">157</a> <strong class="jxr_keyword">long</strong> numChunks = datasize/bytesPerChecksum;
-<a class="jxr_linenumber" name="158" href="#158">158</a> <strong class="jxr_keyword">if</strong> (datasize % bytesPerChecksum != 0) {
-<a class="jxr_linenumber" name="159" href="#159">159</a> numChunks++;
-<a class="jxr_linenumber" name="160" href="#160">160</a> }
-<a class="jxr_linenumber" name="161" href="#161">161</a> <strong class="jxr_keyword">return</strong> numChunks;
-<a class="jxr_linenumber" name="162" href="#162">162</a> }
-<a class="jxr_linenumber" name="163" href="#163">163</a>
-<a class="jxr_linenumber" name="164" href="#164">164</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment"> * Write dummy checksums to the end of the specified bytes array</em>
-<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment"> * to reserve space for writing checksums later</em>
-<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment"> * @param baos OutputStream to write dummy checkum values</em>
-<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment"> * @param numBytes Number of bytes of data for which dummy checksums</em>
-<a class="jxr_linenumber" name="169" href="#169">169</a> <em class="jxr_javadoccomment"> * need to be generated</em>
-<a class="jxr_linenumber" name="170" href="#170">170</a> <em class="jxr_javadoccomment"> * @param bytesPerChecksum Number of bytes per checksum value</em>
-<a class="jxr_linenumber" name="171" href="#171">171</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="172" href="#172">172</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> reserveSpaceForChecksums(ByteArrayOutputStream baos,
-<a class="jxr_linenumber" name="173" href="#173">173</a> <strong class="jxr_keyword">int</strong> numBytes, <strong class="jxr_keyword">int</strong> bytesPerChecksum) <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="174" href="#174">174</a> <strong class="jxr_keyword">long</strong> numChunks = numChunks(numBytes, bytesPerChecksum);
-<a class="jxr_linenumber" name="175" href="#175">175</a> <strong class="jxr_keyword">long</strong> bytesLeft = numChunks * HFileBlock.CHECKSUM_SIZE;
-<a class="jxr_linenumber" name="176" href="#176">176</a> <strong class="jxr_keyword">while</strong> (bytesLeft > 0) {
-<a class="jxr_linenumber" name="177" href="#177">177</a> <strong class="jxr_keyword">long</strong> count = Math.min(bytesLeft, DUMMY_VALUE.length);
-<a class="jxr_linenumber" name="178" href="#178">178</a> baos.write(DUMMY_VALUE, 0, (<strong class="jxr_keyword">int</strong>)count);
-<a class="jxr_linenumber" name="179" href="#179">179</a> bytesLeft -= count;
-<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>
-<a class="jxr_linenumber" name="183" href="#183">183</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="184" href="#184">184</a> <em class="jxr_javadoccomment"> * Mechanism to throw an exception in case of hbase checksum</em>
-<a class="jxr_linenumber" name="185" href="#185">185</a> <em class="jxr_javadoccomment"> * failure. This is used by unit tests only.</em>
-<a class="jxr_linenumber" name="186" href="#186">186</a> <em class="jxr_javadoccomment"> * @param value Setting this to true will cause hbase checksum</em>
-<a class="jxr_linenumber" name="187" href="#187">187</a> <em class="jxr_javadoccomment"> * verification failures to generate exceptions.</em>
-<a class="jxr_linenumber" name="188" href="#188">188</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="189" href="#189">189</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> generateExceptionForChecksumFailureForTest(<strong class="jxr_keyword">boolean</strong> value) {
-<a class="jxr_linenumber" name="190" href="#190">190</a> generateExceptions = value;
-<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>
+<a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.ChecksumType;
+<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.util.DataChecksum;
+<a class="jxr_linenumber" name="30" href="#30">30</a>
+<a class="jxr_linenumber" name="31" href="#31">31</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="32" href="#32">32</a> <em class="jxr_javadoccomment"> * Utility methods to compute and validate checksums.</em>
+<a class="jxr_linenumber" name="33" href="#33">33</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="34" href="#34">34</a> @InterfaceAudience.Private
+<a class="jxr_linenumber" name="35" href="#35">35</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/ChecksumUtil.html">ChecksumUtil</a> {
+<a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(ChecksumUtil.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="37" href="#37">37</a>
+<a class="jxr_linenumber" name="38" href="#38">38</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> This is used to reserve space in a byte buffer */</em>
+<a class="jxr_linenumber" name="39" href="#39">39</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> byte[] DUMMY_VALUE = <strong class="jxr_keyword">new</strong> byte[128 * HFileBlock.CHECKSUM_SIZE];
+<a class="jxr_linenumber" name="40" href="#40">40</a>
+<a class="jxr_linenumber" name="41" href="#41">41</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> </em>
+<a class="jxr_linenumber" name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * This is used by unit tests to make checksum failures throw an </em>
+<a class="jxr_linenumber" name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * exception instead of returning null. Returning a null value from </em>
+<a class="jxr_linenumber" name="44" href="#44">44</a> <em class="jxr_javadoccomment"> * checksum validation will cause the higher layer to retry that </em>
+<a class="jxr_linenumber" name="45" href="#45">45</a> <em class="jxr_javadoccomment"> * read with hdfs-level checksums. Instead, we would like checksum </em>
+<a class="jxr_linenumber" name="46" href="#46">46</a> <em class="jxr_javadoccomment"> * failures to cause the entire unit test to fail.</em>
+<a class="jxr_linenumber" name="47" href="#47">47</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> generateExceptions = false;
+<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"> * Generates a checksum for all the data in indata. The checksum is</em>
+<a class="jxr_linenumber" name="52" href="#52">52</a> <em class="jxr_javadoccomment"> * written to outdata.</em>
+<a class="jxr_linenumber" name="53" href="#53">53</a> <em class="jxr_javadoccomment"> * @param indata input data stream</em>
+<a class="jxr_linenumber" name="54" href="#54">54</a> <em class="jxr_javadoccomment"> * @param startOffset starting offset in the indata stream from where to</em>
+<a class="jxr_linenumber" name="55" href="#55">55</a> <em class="jxr_javadoccomment"> * compute checkums from</em>
+<a class="jxr_linenumber" name="56" href="#56">56</a> <em class="jxr_javadoccomment"> * @param endOffset ending offset in the indata stream upto</em>
+<a class="jxr_linenumber" name="57" href="#57">57</a> <em class="jxr_javadoccomment"> * which checksums needs to be computed</em>
+<a class="jxr_linenumber" name="58" href="#58">58</a> <em class="jxr_javadoccomment"> * @param outdata the output buffer where checksum values are written</em>
+<a class="jxr_linenumber" name="59" href="#59">59</a> <em class="jxr_javadoccomment"> * @param outOffset the starting offset in the outdata where the</em>
+<a class="jxr_linenumber" name="60" href="#60">60</a> <em class="jxr_javadoccomment"> * checksum values are written</em>
+<a class="jxr_linenumber" name="61" href="#61">61</a> <em class="jxr_javadoccomment"> * @param checksumType type of checksum</em>
+<a class="jxr_linenumber" name="62" href="#62">62</a> <em class="jxr_javadoccomment"> * @param bytesPerChecksum number of bytes per checksum value</em>
+<a class="jxr_linenumber" name="63" href="#63">63</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="64" href="#64">64</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> generateChecksums(byte[] indata, <strong class="jxr_keyword">int</strong> startOffset, <strong class="jxr_keyword">int</strong> endOffset,
+<a class="jxr_linenumber" name="65" href="#65">65</a> byte[] outdata, <strong class="jxr_keyword">int</strong> outOffset, <a href="../../../../../../org/apache/hadoop/hbase/util/ChecksumType.html">ChecksumType</a> checksumType,
+<a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">int</strong> bytesPerChecksum) <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="67" href="#67">67</a>
+<a class="jxr_linenumber" name="68" href="#68">68</a> <strong class="jxr_keyword">if</strong> (checksumType == ChecksumType.NULL) {
+<a class="jxr_linenumber" name="69" href="#69">69</a> <strong class="jxr_keyword">return</strong>; <em class="jxr_comment">// No checksum for this block.</em>
+<a class="jxr_linenumber" name="70" href="#70">70</a> }
+<a class="jxr_linenumber" name="71" href="#71">71</a>
+<a class="jxr_linenumber" name="72" href="#72">72</a> DataChecksum checksum = DataChecksum.newDataChecksum(
+<a class="jxr_linenumber" name="73" href="#73">73</a> checksumType.getDataChecksumType(), bytesPerChecksum);
+<a class="jxr_linenumber" name="74" href="#74">74</a>
+<a class="jxr_linenumber" name="75" href="#75">75</a> checksum.calculateChunkedSums(
+<a class="jxr_linenumber" name="76" href="#76">76</a> ByteBuffer.wrap(indata, startOffset, endOffset - startOffset),
+<a class="jxr_linenumber" name="77" href="#77">77</a> ByteBuffer.wrap(outdata, outOffset, outdata.length - outOffset));
+<a class="jxr_linenumber" name="78" href="#78">78</a> }
+<a class="jxr_linenumber" name="79" href="#79">79</a>
+<a class="jxr_linenumber" name="80" href="#80">80</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="81" href="#81">81</a> <em class="jxr_javadoccomment"> * Validates that the data in the specified HFileBlock matches the</em>
+<a class="jxr_linenumber" name="82" href="#82">82</a> <em class="jxr_javadoccomment"> * checksum. Generates the checksum for the data and</em>
+<a class="jxr_linenumber" name="83" href="#83">83</a> <em class="jxr_javadoccomment"> * then validate that it matches the value stored in the header.</em>
+<a class="jxr_linenumber" name="84" href="#84">84</a> <em class="jxr_javadoccomment"> * If there is a checksum mismatch, then return false. Otherwise</em>
+<a class="jxr_linenumber" name="85" href="#85">85</a> <em class="jxr_javadoccomment"> * return true.</em>
+<a class="jxr_linenumber" name="86" href="#86">86</a> <em class="jxr_javadoccomment"> * The header is extracted from the specified HFileBlock while the</em>
+<a class="jxr_linenumber" name="87" href="#87">87</a> <em class="jxr_javadoccomment"> * data-to-be-verified is extracted from 'data'.</em>
+<a class="jxr_linenumber" name="88" href="#88">88</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="89" href="#89">89</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> validateBlockChecksum(String pathName, <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/HFileBlock.html">HFileBlock</a> block,
+<a class="jxr_linenumber" name="90" href="#90">90</a> byte[] data, <strong class="jxr_keyword">int</strong> hdrSize) <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="91" href="#91">91</a>
+<a class="jxr_linenumber" name="92" href="#92">92</a> <em class="jxr_comment">// If this is an older version of the block that does not have</em>
+<a class="jxr_linenumber" name="93" href="#93">93</a> <em class="jxr_comment">// checksums, then return false indicating that checksum verification</em>
+<a class="jxr_linenumber" name="94" href="#94">94</a> <em class="jxr_comment">// did not succeed. Actually, this methiod should never be called</em>
+<a class="jxr_linenumber" name="95" href="#95">95</a> <em class="jxr_comment">// when the minorVersion is 0, thus this is a defensive check for a</em>
+<a class="jxr_linenumber" name="96" href="#96">96</a> <em class="jxr_comment">// cannot-happen case. Since this is a cannot-happen case, it is</em>
+<a class="jxr_linenumber" name="97" href="#97">97</a> <em class="jxr_comment">// better to return false to indicate a checksum validation failure.</em>
+<a class="jxr_linenumber" name="98" href="#98">98</a> <strong class="jxr_keyword">if</strong> (!block.getHFileContext().isUseHBaseChecksum()) {
+<a class="jxr_linenumber" name="99" href="#99">99</a> <strong class="jxr_keyword">return</strong> false;
+<a class="jxr_linenumber" name="100" href="#100">100</a> }
+<a class="jxr_linenumber" name="101" href="#101">101</a>
+<a class="jxr_linenumber" name="102" href="#102">102</a> <em class="jxr_comment">// Get a checksum object based on the type of checksum that is</em>
+<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_comment">// set in the HFileBlock header. A ChecksumType.NULL indicates that </em>
+<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_comment">// the caller is not interested in validating checksums, so we</em>
+<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_comment">// always return true.</em>
+<a class="jxr_linenumber" name="106" href="#106">106</a> <a href="../../../../../../org/apache/hadoop/hbase/util/ChecksumType.html">ChecksumType</a> cktype = ChecksumType.codeToType(block.getChecksumType());
+<a class="jxr_linenumber" name="107" href="#107">107</a> <strong class="jxr_keyword">if</strong> (cktype == ChecksumType.NULL) {
+<a class="jxr_linenumber" name="108" href="#108">108</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>; <em class="jxr_comment">// No checksum validations needed for this block.</em>
+<a class="jxr_linenumber" name="109" href="#109">109</a> }
+<a class="jxr_linenumber" name="110" href="#110">110</a>
+<a class="jxr_linenumber" name="111" href="#111">111</a> <em class="jxr_comment">// read in the stored value of the checksum size from the header.</em>
+<a class="jxr_linenumber" name="112" href="#112">112</a> <strong class="jxr_keyword">int</strong> bytesPerChecksum = block.getBytesPerChecksum();
+<a class="jxr_linenumber" name="113" href="#113">113</a>
+<a class="jxr_linenumber" name="114" href="#114">114</a> DataChecksum dataChecksum = DataChecksum.newDataChecksum(
+<a class="jxr_linenumber" name="115" href="#115">115</a> cktype.getDataChecksumType(), bytesPerChecksum);
+<a class="jxr_linenumber" name="116" href="#116">116</a> assert dataChecksum != <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="117" href="#117">117</a> <strong class="jxr_keyword">int</strong> sizeWithHeader = block.getOnDiskDataSizeWithHeader();
+<a class="jxr_linenumber" name="118" href="#118">118</a> <strong class="jxr_keyword">if</strong> (LOG.isTraceEnabled()) {
+<a class="jxr_linenumber" name="119" href="#119">119</a> LOG.info(<span class="jxr_string">"length of data = "</span> + data.length
+<a class="jxr_linenumber" name="120" href="#120">120</a> + <span class="jxr_string">" OnDiskDataSizeWithHeader = "</span> + sizeWithHeader
+<a class="jxr_linenumber" name="121" href="#121">121</a> + <span class="jxr_string">" checksum type = "</span> + cktype.getName()
+<a class="jxr_linenumber" name="122" href="#122">122</a> + <span class="jxr_string">" file ="</span> + pathName
+<a class="jxr_linenumber" name="123" href="#123">123</a> + <span class="jxr_string">" header size = "</span> + hdrSize
+<a class="jxr_linenumber" name="124" href="#124">124</a> + <span class="jxr_string">" bytesPerChecksum = "</span> + bytesPerChecksum);
+<a class="jxr_linenumber" name="125" href="#125">125</a> }
+<a class="jxr_linenumber" name="126" href="#126">126</a> <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="127" href="#127">127</a> dataChecksum.verifyChunkedSums(ByteBuffer.wrap(data, 0, sizeWithHeader),
+<a class="jxr_linenumber" name="128" href="#128">128</a> ByteBuffer.wrap(data, sizeWithHeader, data.length - sizeWithHeader), pathName, 0);
+<a class="jxr_linenumber" name="129" href="#129">129</a> } <strong class="jxr_keyword">catch</strong> (ChecksumException e) {
+<a class="jxr_linenumber" name="130" href="#130">130</a> <strong class="jxr_keyword">return</strong> false;
+<a class="jxr_linenumber" name="131" href="#131">131</a> }
+<a class="jxr_linenumber" name="132" href="#132">132</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>; <em class="jxr_comment">// checksum is valid</em>
+<a class="jxr_linenumber" name="133" href="#133">133</a> }
+<a class="jxr_linenumber" name="134" href="#134">134</a>
+<a class="jxr_linenumber" name="135" href="#135">135</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="136" href="#136">136</a> <em class="jxr_javadoccomment"> * Returns the number of bytes needed to store the checksums for</em>
+<a class="jxr_linenumber" name="137" href="#137">137</a> <em class="jxr_javadoccomment"> * a specified data size</em>
+<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_javadoccomment"> * @param datasize number of bytes of data</em>
+<a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_javadoccomment"> * @param bytesPerChecksum number of bytes in a checksum chunk</em>
+<a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_javadoccomment"> * @return The number of bytes needed to store the checksum values</em>
+<a class="jxr_linenumber" name="141" href="#141">141</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="142" href="#142">142</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">long</strong> numBytes(<strong class="jxr_keyword">long</strong> datasize, <strong class="jxr_keyword">int</strong> bytesPerChecksum) {
+<a class="jxr_linenumber" name="143" href="#143">143</a> <strong class="jxr_keyword">return</strong> numChunks(datasize, bytesPerChecksum) *
+<a class="jxr_linenumber" name="144" href="#144">144</a> HFileBlock.CHECKSUM_SIZE;
+<a class="jxr_linenumber" name="145" href="#145">145</a> }
+<a class="jxr_linenumber" name="146" href="#146">146</a>
+<a class="jxr_linenumber" name="147" href="#147">147</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="148" href="#148">148</a> <em class="jxr_javadoccomment"> * Returns the number of checksum chunks needed to store the checksums for</em>
+<a class="jxr_linenumber" name="149" href="#149">149</a> <em class="jxr_javadoccomment"> * a specified data size</em>
+<a class="jxr_linenumber" name="150" href="#150">150</a> <em class="jxr_javadoccomment"> * @param datasize number of bytes of data</em>
+<a class="jxr_linenumber" name="151" href="#151">151</a> <em class="jxr_javadoccomment"> * @param bytesPerChecksum number of bytes in a checksum chunk</em>
+<a class="jxr_linenumber" name="152" href="#152">152</a> <em class="jxr_javadoccomment"> * @return The number of checksum chunks</em>
+<a class="jxr_linenumber" name="153" href="#153">153</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="154" href="#154">154</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">long</strong> numChunks(<strong class="jxr_keyword">long</strong> datasize, <strong class="jxr_keyword">int</strong> bytesPerChecksum) {
+<a class="jxr_linenumber" name="155" href="#155">155</a> <strong class="jxr_keyword">long</strong> numChunks = datasize/bytesPerChecksum;
+<a class="jxr_linenumber" name="156" href="#156">156</a> <strong class="jxr_keyword">if</strong> (datasize % bytesPerChecksum != 0) {
+<a class="jxr_linenumber" name="157" href="#157">157</a> numChunks++;
+<a class="jxr_linenumber" name="158" href="#158">158</a> }
+<a class="jxr_linenumber" name="159" href="#159">159</a> <strong class="jxr_keyword">return</strong> numChunks;
+<a class="jxr_linenumber" name="160" href="#160">160</a> }
+<a class="jxr_linenumber" name="161" href="#161">161</a>
+<a class="jxr_linenumber" name="162" href="#162">162</a> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_javadoccomment"> * Write dummy checksums to the end of the specified bytes array</em>
+<a class="jxr_linenumber" name="164" href="#164">164</a> <em class="jxr_javadoccomment"> * to reserve space for writing checksums later</em>
+<a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment"> * @param baos OutputStream to write dummy checkum values</em>
+<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment"> * @param numBytes Number of bytes of data for which dummy checksums</em>
+<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment"> * need to be generated</em>
+<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment"> * @param bytesPerChecksum Number of bytes per checksum value</em>
+<a class="jxr_linenumber" name="169" href="#169">169</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="170" href="#170">170</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> reserveSpaceForChecksums(ByteArrayOutputStream baos,
+<a class="jxr_linenumber" name="171" href="#171">171</a> <strong class="jxr_keyword">int</strong> numBytes, <strong class="jxr_keyword">int</strong> bytesPerChecksum) <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="172" href="#172">172</a> <strong class="jxr_keyword">long</strong> numChunks = numChunks(numBytes, bytesPerChecksum);
+<a class="jxr_linenumber" name="173" href="#173">173</a> <strong class="jxr_keyword">long</strong> bytesLeft = numChunks * HFileBlock.CHECKSUM_SIZE;
+<a class="jxr_linenumber" name="174" href="#174">174</a> <strong class="jxr_keyword">while</strong> (bytesLeft > 0) {
+<a class="jxr_linenumber" name="175" href="#175">175</a> <strong class="jxr_keyword">long</strong> count = Math.min(bytesLeft, DUMMY_VALUE.length);
+<a class="jxr_linenumber" name="176" href="#176">176</a> baos.write(DUMMY_VALUE, 0, (<strong class="jxr_keyword">int</strong>)count);
+<a class="jxr_linenumber" name="177" href="#177">177</a> bytesLeft -= count;
+<a class="jxr_linenumber" name="178" href="#178">178</a> }
+<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> <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="182" href="#182">182</a> <em class="jxr_javadoccomment"> * Mechanism to throw an exception in case of hbase checksum</em>
+<a class="jxr_linenumber" name="183" href="#183">183</a> <em class="jxr_javadoccomment"> * failure. This is used by unit tests only.</em>
+<a class="jxr_linenumber" name="184" href="#184">184</a> <em class="jxr_javadoccomment"> * @param value Setting this to true will cause hbase checksum</em>
+<a class="jxr_linenumber" name="185" href="#185">185</a> <em class="jxr_javadoccomment"> * verification failures to generate exceptions.</em>
+<a class="jxr_linenumber" name="186" href="#186">186</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="187" href="#187">187</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> generateExceptionForChecksumFailureForTest(<strong class="jxr_keyword">boolean</strong> value) {
+<a class="jxr_linenumber" name="188" href="#188">188</a> generateExceptions = value;
+<a class="jxr_linenumber" name="189" href="#189">189</a> }
+<a class="jxr_linenumber" name="190" href="#190">190</a> }
+<a class="jxr_linenumber" name="191" href="#191">191</a>
</pre>
<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
</html>