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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/12/27 14:53:25 UTC
[19/51] [partial] hbase-site git commit: Published site at
7820ba1dbdba58b1002cdfde08eb21aa7a0bb6da.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/09ea0d5f/devapidocs/src-html/org/apache/hadoop/hbase/client/ClientSideRegionScanner.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/client/ClientSideRegionScanner.html b/devapidocs/src-html/org/apache/hadoop/hbase/client/ClientSideRegionScanner.html
index 0ffc8e0..a960a57 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/client/ClientSideRegionScanner.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/client/ClientSideRegionScanner.html
@@ -34,99 +34,107 @@
<span class="sourceLineNo">026</span>import org.apache.hadoop.fs.FileSystem;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.Path;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.Cell;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.CellUtil;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.PrivateCellUtil;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.client.metrics.ScanMetrics;<a name="line.31"></a>
+<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.PrivateCellUtil;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.client.metrics.ScanMetrics;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.mob.MobFileCache;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.regionserver.RegionScanner;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.slf4j.Logger;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.slf4j.LoggerFactory;<a name="line.36"></a>
-<span class="sourceLineNo">037</span><a name="line.37"></a>
-<span class="sourceLineNo">038</span>/**<a name="line.38"></a>
-<span class="sourceLineNo">039</span> * A client scanner for a region opened for read-only on the client side. Assumes region data<a name="line.39"></a>
-<span class="sourceLineNo">040</span> * is not changing.<a name="line.40"></a>
-<span class="sourceLineNo">041</span> */<a name="line.41"></a>
-<span class="sourceLineNo">042</span>@InterfaceAudience.Private<a name="line.42"></a>
-<span class="sourceLineNo">043</span>public class ClientSideRegionScanner extends AbstractClientScanner {<a name="line.43"></a>
-<span class="sourceLineNo">044</span><a name="line.44"></a>
-<span class="sourceLineNo">045</span> private static final Logger LOG = LoggerFactory.getLogger(ClientSideRegionScanner.class);<a name="line.45"></a>
-<span class="sourceLineNo">046</span><a name="line.46"></a>
-<span class="sourceLineNo">047</span> private HRegion region;<a name="line.47"></a>
-<span class="sourceLineNo">048</span> RegionScanner scanner;<a name="line.48"></a>
-<span class="sourceLineNo">049</span> List<Cell> values;<a name="line.49"></a>
-<span class="sourceLineNo">050</span><a name="line.50"></a>
-<span class="sourceLineNo">051</span> public ClientSideRegionScanner(Configuration conf, FileSystem fs,<a name="line.51"></a>
-<span class="sourceLineNo">052</span> Path rootDir, TableDescriptor htd, RegionInfo hri, Scan scan, ScanMetrics scanMetrics)<a name="line.52"></a>
-<span class="sourceLineNo">053</span> throws IOException {<a name="line.53"></a>
-<span class="sourceLineNo">054</span> // region is immutable, set isolation level<a name="line.54"></a>
-<span class="sourceLineNo">055</span> scan.setIsolationLevel(IsolationLevel.READ_UNCOMMITTED);<a name="line.55"></a>
-<span class="sourceLineNo">056</span><a name="line.56"></a>
-<span class="sourceLineNo">057</span> htd = TableDescriptorBuilder.newBuilder(htd).setReadOnly(true).build();<a name="line.57"></a>
-<span class="sourceLineNo">058</span><a name="line.58"></a>
-<span class="sourceLineNo">059</span> // open region from the snapshot directory<a name="line.59"></a>
-<span class="sourceLineNo">060</span> this.region = HRegion.openHRegion(conf, fs, rootDir, hri, htd, null, null, null);<a name="line.60"></a>
-<span class="sourceLineNo">061</span><a name="line.61"></a>
-<span class="sourceLineNo">062</span> // create an internal region scanner<a name="line.62"></a>
-<span class="sourceLineNo">063</span> this.scanner = region.getScanner(scan);<a name="line.63"></a>
-<span class="sourceLineNo">064</span> values = new ArrayList<>();<a name="line.64"></a>
-<span class="sourceLineNo">065</span><a name="line.65"></a>
-<span class="sourceLineNo">066</span> if (scanMetrics == null) {<a name="line.66"></a>
-<span class="sourceLineNo">067</span> initScanMetrics(scan);<a name="line.67"></a>
-<span class="sourceLineNo">068</span> } else {<a name="line.68"></a>
-<span class="sourceLineNo">069</span> this.scanMetrics = scanMetrics;<a name="line.69"></a>
-<span class="sourceLineNo">070</span> }<a name="line.70"></a>
-<span class="sourceLineNo">071</span> region.startRegionOperation();<a name="line.71"></a>
-<span class="sourceLineNo">072</span> }<a name="line.72"></a>
+<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.slf4j.Logger;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.slf4j.LoggerFactory;<a name="line.37"></a>
+<span class="sourceLineNo">038</span><a name="line.38"></a>
+<span class="sourceLineNo">039</span>/**<a name="line.39"></a>
+<span class="sourceLineNo">040</span> * A client scanner for a region opened for read-only on the client side. Assumes region data<a name="line.40"></a>
+<span class="sourceLineNo">041</span> * is not changing.<a name="line.41"></a>
+<span class="sourceLineNo">042</span> */<a name="line.42"></a>
+<span class="sourceLineNo">043</span>@InterfaceAudience.Private<a name="line.43"></a>
+<span class="sourceLineNo">044</span>public class ClientSideRegionScanner extends AbstractClientScanner {<a name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span> private static final Logger LOG = LoggerFactory.getLogger(ClientSideRegionScanner.class);<a name="line.46"></a>
+<span class="sourceLineNo">047</span><a name="line.47"></a>
+<span class="sourceLineNo">048</span> private HRegion region;<a name="line.48"></a>
+<span class="sourceLineNo">049</span> RegionScanner scanner;<a name="line.49"></a>
+<span class="sourceLineNo">050</span> List<Cell> values;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span> public ClientSideRegionScanner(Configuration conf, FileSystem fs,<a name="line.52"></a>
+<span class="sourceLineNo">053</span> Path rootDir, TableDescriptor htd, RegionInfo hri, Scan scan, ScanMetrics scanMetrics)<a name="line.53"></a>
+<span class="sourceLineNo">054</span> throws IOException {<a name="line.54"></a>
+<span class="sourceLineNo">055</span> // region is immutable, set isolation level<a name="line.55"></a>
+<span class="sourceLineNo">056</span> scan.setIsolationLevel(IsolationLevel.READ_UNCOMMITTED);<a name="line.56"></a>
+<span class="sourceLineNo">057</span><a name="line.57"></a>
+<span class="sourceLineNo">058</span> htd = TableDescriptorBuilder.newBuilder(htd).setReadOnly(true).build();<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
+<span class="sourceLineNo">060</span> // open region from the snapshot directory<a name="line.60"></a>
+<span class="sourceLineNo">061</span> region = HRegion.newHRegion(FSUtils.getTableDir(rootDir, htd.getTableName()), null, fs, conf,<a name="line.61"></a>
+<span class="sourceLineNo">062</span> hri, htd, null);<a name="line.62"></a>
+<span class="sourceLineNo">063</span> // we won't initialize the MobFileCache when not running in RS process. so provided an<a name="line.63"></a>
+<span class="sourceLineNo">064</span> // initialized cache. Consider the case: an CF was set from an mob to non-mob. if we only<a name="line.64"></a>
+<span class="sourceLineNo">065</span> // initialize cache for MOB region, NPE from HMobStore will still happen. So Initialize the<a name="line.65"></a>
+<span class="sourceLineNo">066</span> // cache for every region although it may hasn't any mob CF, BTW the cache is very light-weight.<a name="line.66"></a>
+<span class="sourceLineNo">067</span> region.setMobFileCache(new MobFileCache(conf));<a name="line.67"></a>
+<span class="sourceLineNo">068</span> region.initialize();<a name="line.68"></a>
+<span class="sourceLineNo">069</span><a name="line.69"></a>
+<span class="sourceLineNo">070</span> // create an internal region scanner<a name="line.70"></a>
+<span class="sourceLineNo">071</span> this.scanner = region.getScanner(scan);<a name="line.71"></a>
+<span class="sourceLineNo">072</span> values = new ArrayList<>();<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
-<span class="sourceLineNo">074</span> @Override<a name="line.74"></a>
-<span class="sourceLineNo">075</span> public Result next() throws IOException {<a name="line.75"></a>
-<span class="sourceLineNo">076</span> values.clear();<a name="line.76"></a>
-<span class="sourceLineNo">077</span> scanner.nextRaw(values);<a name="line.77"></a>
-<span class="sourceLineNo">078</span> if (values.isEmpty()) {<a name="line.78"></a>
-<span class="sourceLineNo">079</span> //we are done<a name="line.79"></a>
-<span class="sourceLineNo">080</span> return null;<a name="line.80"></a>
-<span class="sourceLineNo">081</span> }<a name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span> Result result = Result.create(values);<a name="line.83"></a>
-<span class="sourceLineNo">084</span> if (this.scanMetrics != null) {<a name="line.84"></a>
-<span class="sourceLineNo">085</span> long resultSize = 0;<a name="line.85"></a>
-<span class="sourceLineNo">086</span> for (Cell cell : values) {<a name="line.86"></a>
-<span class="sourceLineNo">087</span> resultSize += PrivateCellUtil.estimatedSerializedSizeOf(cell);<a name="line.87"></a>
-<span class="sourceLineNo">088</span> }<a name="line.88"></a>
-<span class="sourceLineNo">089</span> this.scanMetrics.countOfBytesInResults.addAndGet(resultSize);<a name="line.89"></a>
-<span class="sourceLineNo">090</span> this.scanMetrics.countOfRowsScanned.incrementAndGet();<a name="line.90"></a>
-<span class="sourceLineNo">091</span> }<a name="line.91"></a>
-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span> return result;<a name="line.93"></a>
-<span class="sourceLineNo">094</span> }<a name="line.94"></a>
-<span class="sourceLineNo">095</span><a name="line.95"></a>
-<span class="sourceLineNo">096</span> @Override<a name="line.96"></a>
-<span class="sourceLineNo">097</span> public void close() {<a name="line.97"></a>
-<span class="sourceLineNo">098</span> if (this.scanner != null) {<a name="line.98"></a>
-<span class="sourceLineNo">099</span> try {<a name="line.99"></a>
-<span class="sourceLineNo">100</span> this.scanner.close();<a name="line.100"></a>
-<span class="sourceLineNo">101</span> this.scanner = null;<a name="line.101"></a>
-<span class="sourceLineNo">102</span> } catch (IOException ex) {<a name="line.102"></a>
-<span class="sourceLineNo">103</span> LOG.warn("Exception while closing scanner", ex);<a name="line.103"></a>
-<span class="sourceLineNo">104</span> }<a name="line.104"></a>
-<span class="sourceLineNo">105</span> }<a name="line.105"></a>
-<span class="sourceLineNo">106</span> if (this.region != null) {<a name="line.106"></a>
+<span class="sourceLineNo">074</span> if (scanMetrics == null) {<a name="line.74"></a>
+<span class="sourceLineNo">075</span> initScanMetrics(scan);<a name="line.75"></a>
+<span class="sourceLineNo">076</span> } else {<a name="line.76"></a>
+<span class="sourceLineNo">077</span> this.scanMetrics = scanMetrics;<a name="line.77"></a>
+<span class="sourceLineNo">078</span> }<a name="line.78"></a>
+<span class="sourceLineNo">079</span> region.startRegionOperation();<a name="line.79"></a>
+<span class="sourceLineNo">080</span> }<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span> @Override<a name="line.82"></a>
+<span class="sourceLineNo">083</span> public Result next() throws IOException {<a name="line.83"></a>
+<span class="sourceLineNo">084</span> values.clear();<a name="line.84"></a>
+<span class="sourceLineNo">085</span> scanner.nextRaw(values);<a name="line.85"></a>
+<span class="sourceLineNo">086</span> if (values.isEmpty()) {<a name="line.86"></a>
+<span class="sourceLineNo">087</span> //we are done<a name="line.87"></a>
+<span class="sourceLineNo">088</span> return null;<a name="line.88"></a>
+<span class="sourceLineNo">089</span> }<a name="line.89"></a>
+<span class="sourceLineNo">090</span><a name="line.90"></a>
+<span class="sourceLineNo">091</span> Result result = Result.create(values);<a name="line.91"></a>
+<span class="sourceLineNo">092</span> if (this.scanMetrics != null) {<a name="line.92"></a>
+<span class="sourceLineNo">093</span> long resultSize = 0;<a name="line.93"></a>
+<span class="sourceLineNo">094</span> for (Cell cell : values) {<a name="line.94"></a>
+<span class="sourceLineNo">095</span> resultSize += PrivateCellUtil.estimatedSerializedSizeOf(cell);<a name="line.95"></a>
+<span class="sourceLineNo">096</span> }<a name="line.96"></a>
+<span class="sourceLineNo">097</span> this.scanMetrics.countOfBytesInResults.addAndGet(resultSize);<a name="line.97"></a>
+<span class="sourceLineNo">098</span> this.scanMetrics.countOfRowsScanned.incrementAndGet();<a name="line.98"></a>
+<span class="sourceLineNo">099</span> }<a name="line.99"></a>
+<span class="sourceLineNo">100</span><a name="line.100"></a>
+<span class="sourceLineNo">101</span> return result;<a name="line.101"></a>
+<span class="sourceLineNo">102</span> }<a name="line.102"></a>
+<span class="sourceLineNo">103</span><a name="line.103"></a>
+<span class="sourceLineNo">104</span> @Override<a name="line.104"></a>
+<span class="sourceLineNo">105</span> public void close() {<a name="line.105"></a>
+<span class="sourceLineNo">106</span> if (this.scanner != null) {<a name="line.106"></a>
<span class="sourceLineNo">107</span> try {<a name="line.107"></a>
-<span class="sourceLineNo">108</span> this.region.closeRegionOperation();<a name="line.108"></a>
-<span class="sourceLineNo">109</span> this.region.close(true);<a name="line.109"></a>
-<span class="sourceLineNo">110</span> this.region = null;<a name="line.110"></a>
-<span class="sourceLineNo">111</span> } catch (IOException ex) {<a name="line.111"></a>
-<span class="sourceLineNo">112</span> LOG.warn("Exception while closing region", ex);<a name="line.112"></a>
-<span class="sourceLineNo">113</span> }<a name="line.113"></a>
-<span class="sourceLineNo">114</span> }<a name="line.114"></a>
-<span class="sourceLineNo">115</span> }<a name="line.115"></a>
-<span class="sourceLineNo">116</span><a name="line.116"></a>
-<span class="sourceLineNo">117</span> @Override<a name="line.117"></a>
-<span class="sourceLineNo">118</span> public boolean renewLease() {<a name="line.118"></a>
-<span class="sourceLineNo">119</span> throw new UnsupportedOperationException();<a name="line.119"></a>
-<span class="sourceLineNo">120</span> }<a name="line.120"></a>
-<span class="sourceLineNo">121</span>}<a name="line.121"></a>
+<span class="sourceLineNo">108</span> this.scanner.close();<a name="line.108"></a>
+<span class="sourceLineNo">109</span> this.scanner = null;<a name="line.109"></a>
+<span class="sourceLineNo">110</span> } catch (IOException ex) {<a name="line.110"></a>
+<span class="sourceLineNo">111</span> LOG.warn("Exception while closing scanner", ex);<a name="line.111"></a>
+<span class="sourceLineNo">112</span> }<a name="line.112"></a>
+<span class="sourceLineNo">113</span> }<a name="line.113"></a>
+<span class="sourceLineNo">114</span> if (this.region != null) {<a name="line.114"></a>
+<span class="sourceLineNo">115</span> try {<a name="line.115"></a>
+<span class="sourceLineNo">116</span> this.region.closeRegionOperation();<a name="line.116"></a>
+<span class="sourceLineNo">117</span> this.region.close(true);<a name="line.117"></a>
+<span class="sourceLineNo">118</span> this.region = null;<a name="line.118"></a>
+<span class="sourceLineNo">119</span> } catch (IOException ex) {<a name="line.119"></a>
+<span class="sourceLineNo">120</span> LOG.warn("Exception while closing region", ex);<a name="line.120"></a>
+<span class="sourceLineNo">121</span> }<a name="line.121"></a>
+<span class="sourceLineNo">122</span> }<a name="line.122"></a>
+<span class="sourceLineNo">123</span> }<a name="line.123"></a>
+<span class="sourceLineNo">124</span><a name="line.124"></a>
+<span class="sourceLineNo">125</span> @Override<a name="line.125"></a>
+<span class="sourceLineNo">126</span> public boolean renewLease() {<a name="line.126"></a>
+<span class="sourceLineNo">127</span> throw new UnsupportedOperationException();<a name="line.127"></a>
+<span class="sourceLineNo">128</span> }<a name="line.128"></a>
+<span class="sourceLineNo">129</span>}<a name="line.129"></a>