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 2016/02/09 18:27:50 UTC
[04/51] [partial] hbase-site git commit: Published site at
7bb68b9031591cf378954a0eb8f71a8b9be01f9c.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/358717f6/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALKey.Version.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALKey.Version.html b/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALKey.Version.html
index fa2326f..26033db 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALKey.Version.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALKey.Version.html
@@ -38,641 +38,630 @@
<span class="sourceLineNo">030</span>import java.util.TreeMap;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.UUID;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.util.concurrent.CountDownLatch;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import java.util.concurrent.TimeUnit;<a name="line.33"></a>
-<span class="sourceLineNo">034</span><a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.util.ByteStringer;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import org.apache.commons.logging.Log;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.apache.commons.logging.LogFactory;<a name="line.38"></a>
+<span class="sourceLineNo">033</span><a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.apache.commons.logging.Log;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.apache.commons.logging.LogFactory;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.HBaseInterfaceAudience;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.HConstants;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.TableName;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.exceptions.TimeoutIOException;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.HBaseInterfaceAudience;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.HConstants;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.TableName;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.protobuf.generated.WALProtos.FamilyScope;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.protobuf.generated.WALProtos.ScopeType;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.regionserver.SequenceId;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.49"></a>
-<span class="sourceLineNo">050</span><a name="line.50"></a>
-<span class="sourceLineNo">051</span>import com.google.common.annotations.VisibleForTesting;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import com.google.protobuf.ByteString;<a name="line.52"></a>
-<span class="sourceLineNo">053</span><a name="line.53"></a>
-<span class="sourceLineNo">054</span>// imports for things that haven't moved from regionserver.wal yet.<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.regionserver.wal.CompressionContext;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.regionserver.wal.WALCellCodec;<a name="line.56"></a>
-<span class="sourceLineNo">057</span><a name="line.57"></a>
-<span class="sourceLineNo">058</span>/**<a name="line.58"></a>
-<span class="sourceLineNo">059</span> * A Key for an entry in the change log.<a name="line.59"></a>
-<span class="sourceLineNo">060</span> *<a name="line.60"></a>
-<span class="sourceLineNo">061</span> * The log intermingles edits to many tables and rows, so each log entry<a name="line.61"></a>
-<span class="sourceLineNo">062</span> * identifies the appropriate table and row. Within a table and row, they're<a name="line.62"></a>
-<span class="sourceLineNo">063</span> * also sorted.<a name="line.63"></a>
-<span class="sourceLineNo">064</span> *<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * <p>Some Transactional edits (START, COMMIT, ABORT) will not have an<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * associated row.<a name="line.66"></a>
-<span class="sourceLineNo">067</span> *<a name="line.67"></a>
-<span class="sourceLineNo">068</span> * Note that protected members marked @InterfaceAudience.Private are only protected<a name="line.68"></a>
-<span class="sourceLineNo">069</span> * to support the legacy HLogKey class, which is in a different package.<a name="line.69"></a>
-<span class="sourceLineNo">070</span> * <a name="line.70"></a>
-<span class="sourceLineNo">071</span> * <p><a name="line.71"></a>
-<span class="sourceLineNo">072</span> */<a name="line.72"></a>
-<span class="sourceLineNo">073</span>// TODO: Key and WALEdit are never used separately, or in one-to-many relation, for practical<a name="line.73"></a>
-<span class="sourceLineNo">074</span>// purposes. They need to be merged into WALEntry.<a name="line.74"></a>
-<span class="sourceLineNo">075</span>// TODO: Cleanup. We have logSeqNum and then WriteEntry, both are sequence id'ing. Fix.<a name="line.75"></a>
-<span class="sourceLineNo">076</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.REPLICATION)<a name="line.76"></a>
-<span class="sourceLineNo">077</span>public class WALKey implements SequenceId, Comparable<WALKey> {<a name="line.77"></a>
-<span class="sourceLineNo">078</span> private static final Log LOG = LogFactory.getLog(WALKey.class);<a name="line.78"></a>
-<span class="sourceLineNo">079</span><a name="line.79"></a>
-<span class="sourceLineNo">080</span> @InterfaceAudience.Private // For internal use only.<a name="line.80"></a>
-<span class="sourceLineNo">081</span> public MultiVersionConcurrencyControl getMvcc() {<a name="line.81"></a>
-<span class="sourceLineNo">082</span> return mvcc;<a name="line.82"></a>
-<span class="sourceLineNo">083</span> }<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span> /**<a name="line.85"></a>
-<span class="sourceLineNo">086</span> * Will block until a write entry has been assigned by they WAL subsystem.<a name="line.86"></a>
-<span class="sourceLineNo">087</span> * @return A WriteEntry gotten from local WAL subsystem. Must be completed by calling<a name="line.87"></a>
-<span class="sourceLineNo">088</span> * {@link MultiVersionConcurrencyControl#complete(MultiVersionConcurrencyControl.WriteEntry)}<a name="line.88"></a>
-<span class="sourceLineNo">089</span> * or<a name="line.89"></a>
-<span class="sourceLineNo">090</span> * {@link MultiVersionConcurrencyControl#complete(MultiVersionConcurrencyControl.WriteEntry)}<a name="line.90"></a>
-<span class="sourceLineNo">091</span> * @see #setWriteEntry(MultiVersionConcurrencyControl.WriteEntry)<a name="line.91"></a>
-<span class="sourceLineNo">092</span> */<a name="line.92"></a>
-<span class="sourceLineNo">093</span> @InterfaceAudience.Private // For internal use only.<a name="line.93"></a>
-<span class="sourceLineNo">094</span> public MultiVersionConcurrencyControl.WriteEntry getWriteEntry() throws InterruptedIOException {<a name="line.94"></a>
-<span class="sourceLineNo">095</span> try {<a name="line.95"></a>
-<span class="sourceLineNo">096</span> this.seqNumAssignedLatch.await();<a name="line.96"></a>
-<span class="sourceLineNo">097</span> } catch (InterruptedException ie) {<a name="line.97"></a>
-<span class="sourceLineNo">098</span> // If interrupted... clear out our entry else we can block up mvcc.<a name="line.98"></a>
-<span class="sourceLineNo">099</span> MultiVersionConcurrencyControl mvcc = getMvcc();<a name="line.99"></a>
-<span class="sourceLineNo">100</span> LOG.debug("mvcc=" + mvcc + ", writeEntry=" + this.writeEntry);<a name="line.100"></a>
-<span class="sourceLineNo">101</span> if (mvcc != null) {<a name="line.101"></a>
-<span class="sourceLineNo">102</span> if (this.writeEntry != null) {<a name="line.102"></a>
-<span class="sourceLineNo">103</span> mvcc.complete(this.writeEntry);<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> InterruptedIOException iie = new InterruptedIOException();<a name="line.106"></a>
-<span class="sourceLineNo">107</span> iie.initCause(ie);<a name="line.107"></a>
-<span class="sourceLineNo">108</span> throw iie;<a name="line.108"></a>
-<span class="sourceLineNo">109</span> }<a name="line.109"></a>
-<span class="sourceLineNo">110</span> return this.writeEntry;<a name="line.110"></a>
-<span class="sourceLineNo">111</span> }<a name="line.111"></a>
-<span class="sourceLineNo">112</span><a name="line.112"></a>
-<span class="sourceLineNo">113</span> @InterfaceAudience.Private // For internal use only.<a name="line.113"></a>
-<span class="sourceLineNo">114</span> public void setWriteEntry(MultiVersionConcurrencyControl.WriteEntry writeEntry) {<a name="line.114"></a>
-<span class="sourceLineNo">115</span> this.writeEntry = writeEntry;<a name="line.115"></a>
-<span class="sourceLineNo">116</span> this.seqNumAssignedLatch.countDown();<a name="line.116"></a>
-<span class="sourceLineNo">117</span> }<a name="line.117"></a>
-<span class="sourceLineNo">118</span><a name="line.118"></a>
-<span class="sourceLineNo">119</span> // should be < 0 (@see HLogKey#readFields(DataInput))<a name="line.119"></a>
-<span class="sourceLineNo">120</span> // version 2 supports WAL compression<a name="line.120"></a>
-<span class="sourceLineNo">121</span> // public members here are only public because of HLogKey<a name="line.121"></a>
-<span class="sourceLineNo">122</span> @InterfaceAudience.Private<a name="line.122"></a>
-<span class="sourceLineNo">123</span> protected enum Version {<a name="line.123"></a>
-<span class="sourceLineNo">124</span> UNVERSIONED(0),<a name="line.124"></a>
-<span class="sourceLineNo">125</span> // Initial number we put on WALKey when we introduced versioning.<a name="line.125"></a>
-<span class="sourceLineNo">126</span> INITIAL(-1),<a name="line.126"></a>
-<span class="sourceLineNo">127</span> // Version -2 introduced a dictionary compression facility. Only this<a name="line.127"></a>
-<span class="sourceLineNo">128</span> // dictionary-based compression is available in version -2.<a name="line.128"></a>
-<span class="sourceLineNo">129</span> COMPRESSED(-2);<a name="line.129"></a>
-<span class="sourceLineNo">130</span><a name="line.130"></a>
-<span class="sourceLineNo">131</span> public final int code;<a name="line.131"></a>
-<span class="sourceLineNo">132</span> static final Version[] byCode;<a name="line.132"></a>
-<span class="sourceLineNo">133</span> static {<a name="line.133"></a>
-<span class="sourceLineNo">134</span> byCode = Version.values();<a name="line.134"></a>
-<span class="sourceLineNo">135</span> for (int i = 0; i < byCode.length; i++) {<a name="line.135"></a>
-<span class="sourceLineNo">136</span> if (byCode[i].code != -1 * i) {<a name="line.136"></a>
-<span class="sourceLineNo">137</span> throw new AssertionError("Values in this enum should be descending by one");<a name="line.137"></a>
-<span class="sourceLineNo">138</span> }<a name="line.138"></a>
-<span class="sourceLineNo">139</span> }<a name="line.139"></a>
-<span class="sourceLineNo">140</span> }<a name="line.140"></a>
-<span class="sourceLineNo">141</span><a name="line.141"></a>
-<span class="sourceLineNo">142</span> Version(int code) {<a name="line.142"></a>
-<span class="sourceLineNo">143</span> this.code = code;<a name="line.143"></a>
-<span class="sourceLineNo">144</span> }<a name="line.144"></a>
-<span class="sourceLineNo">145</span><a name="line.145"></a>
-<span class="sourceLineNo">146</span> public boolean atLeast(Version other) {<a name="line.146"></a>
-<span class="sourceLineNo">147</span> return code <= other.code;<a name="line.147"></a>
-<span class="sourceLineNo">148</span> }<a name="line.148"></a>
-<span class="sourceLineNo">149</span><a name="line.149"></a>
-<span class="sourceLineNo">150</span> public static Version fromCode(int code) {<a name="line.150"></a>
-<span class="sourceLineNo">151</span> return byCode[code * -1];<a name="line.151"></a>
-<span class="sourceLineNo">152</span> }<a name="line.152"></a>
-<span class="sourceLineNo">153</span> }<a name="line.153"></a>
-<span class="sourceLineNo">154</span><a name="line.154"></a>
-<span class="sourceLineNo">155</span> /*<a name="line.155"></a>
-<span class="sourceLineNo">156</span> * This is used for reading the log entries created by the previous releases<a name="line.156"></a>
-<span class="sourceLineNo">157</span> * (0.94.11) which write the clusters information to the scopes of WALEdit.<a name="line.157"></a>
-<span class="sourceLineNo">158</span> */<a name="line.158"></a>
-<span class="sourceLineNo">159</span> private static final String PREFIX_CLUSTER_KEY = ".";<a name="line.159"></a>
-<span class="sourceLineNo">160</span><a name="line.160"></a>
-<span class="sourceLineNo">161</span><a name="line.161"></a>
-<span class="sourceLineNo">162</span> // visible for deprecated HLogKey<a name="line.162"></a>
-<span class="sourceLineNo">163</span> @InterfaceAudience.Private<a name="line.163"></a>
-<span class="sourceLineNo">164</span> protected static final Version VERSION = Version.COMPRESSED;<a name="line.164"></a>
-<span class="sourceLineNo">165</span><a name="line.165"></a>
-<span class="sourceLineNo">166</span> /** Used to represent when a particular wal key doesn't know/care about the sequence ordering. */<a name="line.166"></a>
-<span class="sourceLineNo">167</span> public static final long NO_SEQUENCE_ID = -1;<a name="line.167"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.protobuf.generated.WALProtos.FamilyScope;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.protobuf.generated.WALProtos.ScopeType;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.regionserver.SequenceId;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>// imports for things that haven't moved from regionserver.wal yet.<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.regionserver.wal.CompressionContext;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.regionserver.wal.WALCellCodec;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.ByteStringer;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span>import com.google.common.annotations.VisibleForTesting;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import com.google.protobuf.ByteString;<a name="line.53"></a>
+<span class="sourceLineNo">054</span><a name="line.54"></a>
+<span class="sourceLineNo">055</span>/**<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * A Key for an entry in the WAL.<a name="line.56"></a>
+<span class="sourceLineNo">057</span> *<a name="line.57"></a>
+<span class="sourceLineNo">058</span> * The log intermingles edits to many tables and rows, so each log entry<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * identifies the appropriate table and row. Within a table and row, they're<a name="line.59"></a>
+<span class="sourceLineNo">060</span> * also sorted.<a name="line.60"></a>
+<span class="sourceLineNo">061</span> *<a name="line.61"></a>
+<span class="sourceLineNo">062</span> * <p>Some Transactional edits (START, COMMIT, ABORT) will not have an associated row.<a name="line.62"></a>
+<span class="sourceLineNo">063</span> *<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * Note that protected members marked @InterfaceAudience.Private are only protected<a name="line.64"></a>
+<span class="sourceLineNo">065</span> * to support the legacy HLogKey class, which is in a different package.<a name="line.65"></a>
+<span class="sourceLineNo">066</span> */<a name="line.66"></a>
+<span class="sourceLineNo">067</span>// TODO: Key and WALEdit are never used separately, or in one-to-many relation, for practical<a name="line.67"></a>
+<span class="sourceLineNo">068</span>// purposes. They need to be merged into WALEntry.<a name="line.68"></a>
+<span class="sourceLineNo">069</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.REPLICATION)<a name="line.69"></a>
+<span class="sourceLineNo">070</span>public class WALKey implements SequenceId, Comparable<WALKey> {<a name="line.70"></a>
+<span class="sourceLineNo">071</span> private static final Log LOG = LogFactory.getLog(WALKey.class);<a name="line.71"></a>
+<span class="sourceLineNo">072</span> private final CountDownLatch sequenceIdAssignedLatch = new CountDownLatch(1);<a name="line.72"></a>
+<span class="sourceLineNo">073</span> /**<a name="line.73"></a>
+<span class="sourceLineNo">074</span> * Used to represent when a particular wal key doesn't know/care about the sequence ordering.<a name="line.74"></a>
+<span class="sourceLineNo">075</span> */<a name="line.75"></a>
+<span class="sourceLineNo">076</span> public static final long NO_SEQUENCE_ID = -1;<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> @InterfaceAudience.Private // For internal use only.<a name="line.78"></a>
+<span class="sourceLineNo">079</span> public MultiVersionConcurrencyControl getMvcc() {<a name="line.79"></a>
+<span class="sourceLineNo">080</span> return mvcc;<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> /**<a name="line.83"></a>
+<span class="sourceLineNo">084</span> * Use it to complete mvcc transaction. This WALKey was part of<a name="line.84"></a>
+<span class="sourceLineNo">085</span> * (the transaction is started when you call append; see the comment on FSHLog#append). To<a name="line.85"></a>
+<span class="sourceLineNo">086</span> * complete call<a name="line.86"></a>
+<span class="sourceLineNo">087</span> * {@link MultiVersionConcurrencyControl#complete(MultiVersionConcurrencyControl.WriteEntry)}<a name="line.87"></a>
+<span class="sourceLineNo">088</span> * or {@link MultiVersionConcurrencyControl#complete(MultiVersionConcurrencyControl.WriteEntry)}<a name="line.88"></a>
+<span class="sourceLineNo">089</span> * @return A WriteEntry gotten from local WAL subsystem.<a name="line.89"></a>
+<span class="sourceLineNo">090</span> * @see #setWriteEntry(MultiVersionConcurrencyControl.WriteEntry)<a name="line.90"></a>
+<span class="sourceLineNo">091</span> */<a name="line.91"></a>
+<span class="sourceLineNo">092</span> @InterfaceAudience.Private // For internal use only.<a name="line.92"></a>
+<span class="sourceLineNo">093</span> public MultiVersionConcurrencyControl.WriteEntry getWriteEntry() throws InterruptedIOException {<a name="line.93"></a>
+<span class="sourceLineNo">094</span> try {<a name="line.94"></a>
+<span class="sourceLineNo">095</span> this.sequenceIdAssignedLatch.await();<a name="line.95"></a>
+<span class="sourceLineNo">096</span> } catch (InterruptedException ie) {<a name="line.96"></a>
+<span class="sourceLineNo">097</span> MultiVersionConcurrencyControl mvcc = getMvcc();<a name="line.97"></a>
+<span class="sourceLineNo">098</span> if (LOG.isDebugEnabled()) {<a name="line.98"></a>
+<span class="sourceLineNo">099</span> LOG.debug("mvcc=" + mvcc + ", writeEntry=" + this.writeEntry);<a name="line.99"></a>
+<span class="sourceLineNo">100</span> }<a name="line.100"></a>
+<span class="sourceLineNo">101</span> InterruptedIOException iie = new InterruptedIOException();<a name="line.101"></a>
+<span class="sourceLineNo">102</span> iie.initCause(ie);<a name="line.102"></a>
+<span class="sourceLineNo">103</span> throw iie;<a name="line.103"></a>
+<span class="sourceLineNo">104</span> }<a name="line.104"></a>
+<span class="sourceLineNo">105</span> return this.writeEntry;<a name="line.105"></a>
+<span class="sourceLineNo">106</span> }<a name="line.106"></a>
+<span class="sourceLineNo">107</span><a name="line.107"></a>
+<span class="sourceLineNo">108</span> @InterfaceAudience.Private // For internal use only.<a name="line.108"></a>
+<span class="sourceLineNo">109</span> public void setWriteEntry(MultiVersionConcurrencyControl.WriteEntry writeEntry) {<a name="line.109"></a>
+<span class="sourceLineNo">110</span> if (this.writeEntry != null) {<a name="line.110"></a>
+<span class="sourceLineNo">111</span> throw new RuntimeException("Non-null!!!");<a name="line.111"></a>
+<span class="sourceLineNo">112</span> }<a name="line.112"></a>
+<span class="sourceLineNo">113</span> this.writeEntry = writeEntry;<a name="line.113"></a>
+<span class="sourceLineNo">114</span> // Set our sequenceid now using WriteEntry.<a name="line.114"></a>
+<span class="sourceLineNo">115</span> if (this.writeEntry != null) {<a name="line.115"></a>
+<span class="sourceLineNo">116</span> this.sequenceId = this.writeEntry.getWriteNumber();<a name="line.116"></a>
+<span class="sourceLineNo">117</span> }<a name="line.117"></a>
+<span class="sourceLineNo">118</span> this.sequenceIdAssignedLatch.countDown();<a name="line.118"></a>
+<span class="sourceLineNo">119</span> }<a name="line.119"></a>
+<span class="sourceLineNo">120</span><a name="line.120"></a>
+<span class="sourceLineNo">121</span> // REMOVE!!!! No more Writables!!!!<a name="line.121"></a>
+<span class="sourceLineNo">122</span> // Should be < 0 (@see HLogKey#readFields(DataInput))<a name="line.122"></a>
+<span class="sourceLineNo">123</span> // version 2 supports WAL compression<a name="line.123"></a>
+<span class="sourceLineNo">124</span> // public members here are only public because of HLogKey<a name="line.124"></a>
+<span class="sourceLineNo">125</span> @InterfaceAudience.Private<a name="line.125"></a>
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+<span class="sourceLineNo">131</span> // dictionary-based compression is available in version -2.<a name="line.131"></a>
+<span class="sourceLineNo">132</span> COMPRESSED(-2);<a name="line.132"></a>
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+<span class="sourceLineNo">142</span> }<a name="line.142"></a>
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+<span class="sourceLineNo">144</span><a name="line.144"></a>
+<span class="sourceLineNo">145</span> Version(int code) {<a name="line.145"></a>
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+<span class="sourceLineNo">148</span><a name="line.148"></a>
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+<span class="sourceLineNo">152</span><a name="line.152"></a>
+<span class="sourceLineNo">153</span> public static Version fromCode(int code) {<a name="line.153"></a>
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+<span class="sourceLineNo">155</span> }<a name="line.155"></a>
+<span class="sourceLineNo">156</span> }<a name="line.156"></a>
+<span class="sourceLineNo">157</span><a name="line.157"></a>
+<span class="sourceLineNo">158</span> /*<a name="line.158"></a>
+<span class="sourceLineNo">159</span> * This is used for reading the log entries created by the previous releases<a name="line.159"></a>
+<span class="sourceLineNo">160</span> * (0.94.11) which write the clusters information to the scopes of WALEdit.<a name="line.160"></a>
+<span class="sourceLineNo">161</span> */<a name="line.161"></a>
+<span class="sourceLineNo">162</span> private static final String PREFIX_CLUSTER_KEY = ".";<a name="line.162"></a>
+<span class="sourceLineNo">163</span><a name="line.163"></a>
+<span class="sourceLineNo">164</span><a name="line.164"></a>
+<span class="sourceLineNo">165</span> // visible for deprecated HLogKey<a name="line.165"></a>
+<span class="sourceLineNo">166</span> @InterfaceAudience.Private<a name="line.166"></a>
+<span class="sourceLineNo">167</span> protected static final Version VERSION = Version.COMPRESSED;<a name="line.167"></a>
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-<span class="sourceLineNo">171</span> @InterfaceAudience.Private<a name="line.171"></a>
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-<span class="sourceLineNo">174</span> @InterfaceAudience.Private<a name="line.174"></a>
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-<span class="sourceLineNo">177</span> @InterfaceAudience.Private<a name="line.177"></a>
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-<span class="sourceLineNo">182</span> // visible for deprecated HLogKey<a name="line.182"></a>
-<span class="sourceLineNo">183</span> @InterfaceAudience.Private<a name="line.183"></a>
-<span class="sourceLineNo">184</span> protected long writeTime;<a name="line.184"></a>
+<span class="sourceLineNo">169</span> // visible for deprecated HLogKey<a name="line.169"></a>
+<span class="sourceLineNo">170</span> @InterfaceAudience.Private<a name="line.170"></a>
+<span class="sourceLineNo">171</span> protected byte [] encodedRegionName;<a name="line.171"></a>
+<span class="sourceLineNo">172</span> // visible for deprecated HLogKey<a name="line.172"></a>
+<span class="sourceLineNo">173</span> @InterfaceAudience.Private<a name="line.173"></a>
+<span class="sourceLineNo">174</span> protected TableName tablename;<a name="line.174"></a>
+<span class="sourceLineNo">175</span> /**<a name="line.175"></a>
+<span class="sourceLineNo">176</span> * SequenceId for this edit. Set post-construction at write-to-WAL time. Until then it is<a name="line.176"></a>
+<span class="sourceLineNo">177</span> * NO_SEQUENCE_ID. Change it so multiple threads can read it -- e.g. access is synchronized.<a name="line.177"></a>
+<span class="sourceLineNo">178</span> */<a name="line.178"></a>
+<span class="sourceLineNo">179</span> private long sequenceId;<a name="line.179"></a>
+<span class="sourceLineNo">180</span><a name="line.180"></a>
+<span class="sourceLineNo">181</span> /**<a name="line.181"></a>
+<span class="sourceLineNo">182</span> * Used during WAL replay; the sequenceId of the edit when it came into the system.<a name="line.182"></a>
+<span class="sourceLineNo">183</span> */<a name="line.183"></a>
+<span class="sourceLineNo">184</span> private long origLogSeqNum = 0;<a name="line.184"></a>
<span class="sourceLineNo">185</span><a name="line.185"></a>
-<span class="sourceLineNo">186</span> // The first element in the list is the cluster id on which the change has originated<a name="line.186"></a>
+<span class="sourceLineNo">186</span> // Time at which this edit was written.<a name="line.186"></a>
<span class="sourceLineNo">187</span> // visible for deprecated HLogKey<a name="line.187"></a>
<span class="sourceLineNo">188</span> @InterfaceAudience.Private<a name="line.188"></a>
-<span class="sourceLineNo">189</span> protected List<UUID> clusterIds;<a name="line.189"></a>
+<span class="sourceLineNo">189</span> protected long writeTime;<a name="line.189"></a>
<span class="sourceLineNo">190</span><a name="line.190"></a>
-<span class="sourceLineNo">191</span> private NavigableMap<byte[], Integer> scopes;<a name="line.191"></a>
-<span class="sourceLineNo">192</span><a name="line.192"></a>
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-<span class="sourceLineNo">194</span> private long nonce = HConstants.NO_NONCE;<a name="line.194"></a>
-<span class="sourceLineNo">195</span> private MultiVersionConcurrencyControl mvcc;<a name="line.195"></a>
-<span class="sourceLineNo">196</span> private MultiVersionConcurrencyControl.WriteEntry writeEntry;<a name="line.196"></a>
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-<span class="sourceLineNo">198</span><a name="line.198"></a>
-<span class="sourceLineNo">199</span> // visible for deprecated HLogKey<a name="line.199"></a>
-<span class="sourceLineNo">200</span> @InterfaceAudience.Private<a name="line.200"></a>
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-<span class="sourceLineNo">202</span><a name="line.202"></a>
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-<span class="sourceLineNo">205</span> new ArrayList<UUID>(), HConstants.NO_NONCE, HConstants.NO_NONCE, null);<a name="line.205"></a>
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-<span class="sourceLineNo">207</span><a name="line.207"></a>
-<span class="sourceLineNo">208</span> @VisibleForTesting<a name="line.208"></a>
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-<span class="sourceLineNo">210</span> long logSeqNum,<a name="line.210"></a>
-<span class="sourceLineNo">211</span> final long now, UUID clusterId) {<a name="line.211"></a>
-<span class="sourceLineNo">212</span> List<UUID> clusterIds = new ArrayList<UUID>();<a name="line.212"></a>
-<span class="sourceLineNo">213</span> clusterIds.add(clusterId);<a name="line.213"></a>
-<span class="sourceLineNo">214</span> init(encodedRegionName, tablename, logSeqNum, now, clusterIds,<a name="line.214"></a>
-<span class="sourceLineNo">215</span> HConstants.NO_NONCE, HConstants.NO_NONCE, null);<a name="line.215"></a>
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-<span class="sourceLineNo">217</span><a name="line.217"></a>
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-<span class="sourceLineNo">219</span> this(encodedRegionName, tablename, System.currentTimeMillis());<a name="line.219"></a>
-<span class="sourceLineNo">220</span> }<a name="line.220"></a>
-<span class="sourceLineNo">221</span><a name="line.221"></a>
-<span class="sourceLineNo">222</span> public WALKey(final byte[] encodedRegionName, final TableName tablename, final long now) {<a name="line.222"></a>
-<span class="sourceLineNo">223</span> init(encodedRegionName,<a name="line.223"></a>
-<span class="sourceLineNo">224</span> tablename,<a name="line.224"></a>
-<span class="sourceLineNo">225</span> NO_SEQUENCE_ID,<a name="line.225"></a>
-<span class="sourceLineNo">226</span> now,<a name="line.226"></a>
-<span class="sourceLineNo">227</span> EMPTY_UUIDS,<a name="line.227"></a>
-<span class="sourceLineNo">228</span> HConstants.NO_NONCE,<a name="line.228"></a>
-<span class="sourceLineNo">229</span> HConstants.NO_NONCE,<a name="line.229"></a>
-<span class="sourceLineNo">230</span> null);<a name="line.230"></a>
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-<span class="sourceLineNo">232</span><a name="line.232"></a>
-<span class="sourceLineNo">233</span> public WALKey(final byte[] encodedRegionName,<a name="line.233"></a>
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-<span class="sourceLineNo">235</span> final long now,<a name="line.235"></a>
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-<span class="sourceLineNo">237</span> init(encodedRegionName,<a name="line.237"></a>
-<span class="sourceLineNo">238</span> tablename,<a name="line.238"></a>
-<span class="sourceLineNo">239</span> NO_SEQUENCE_ID,<a name="line.239"></a>
-<span class="sourceLineNo">240</span> now,<a name="line.240"></a>
-<span class="sourceLineNo">241</span> EMPTY_UUIDS,<a name="line.241"></a>
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+<span class="sourceLineNo">192</span> // visible for deprecated HLogKey<a name="line.192"></a>
+<span class="sourceLineNo">193</span> @InterfaceAudience.Private<a name="line.193"></a>
+<span class="sourceLineNo">194</span> protected List<UUID> clusterIds;<a name="line.194"></a>
+<span class="sourceLineNo">195</span><a name="line.195"></a>
+<span class="sourceLineNo">196</span> private NavigableMap<byte[], Integer> scopes;<a name="line.196"></a>
+<span class="sourceLineNo">197</span><a name="line.197"></a>
+<span class="sourceLineNo">198</span> private long nonceGroup = HConstants.NO_NONCE;<a name="line.198"></a>
+<span class="sourceLineNo">199</span> private long nonce = HConstants.NO_NONCE;<a name="line.199"></a>
+<span class="sourceLineNo">200</span> private MultiVersionConcurrencyControl mvcc;<a name="line.200"></a>
+<span class="sourceLineNo">201</span> /**<a name="line.201"></a>
+<span class="sourceLineNo">202</span> * Set in a way visible to multiple threads; e.g. synchronized getter/setters.<a name="line.202"></a>
+<span class="sourceLineNo">203</span> */<a name="line.203"></a>
+<span class="sourceLineNo">204</span> private MultiVersionConcurrencyControl.WriteEntry writeEntry;<a name="line.204"></a>
+<span class="sourceLineNo">205</span> public static final List<UUID> EMPTY_UUIDS = Collections.unmodifiableList(new ArrayList<UUID>());<a name="line.205"></a>
+<span class="sourceLineNo">206</span><a name="line.206"></a>
+<span class="sourceLineNo">207</span> // visible for deprecated HLogKey<a name="line.207"></a>
+<span class="sourceLineNo">208</span> @InterfaceAudience.Private<a name="line.208"></a>
+<span class="sourceLineNo">209</span> protected CompressionContext compressionContext;<a name="line.209"></a>
+<span class="sourceLineNo">210</span><a name="line.210"></a>
+<span class="sourceLineNo">211</span> public WALKey() {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> init(null, null, 0L, HConstants.LATEST_TIMESTAMP,<a name="line.212"></a>
+<span class="sourceLineNo">213</span> new ArrayList<UUID>(), HConstants.NO_NONCE, HConstants.NO_NONCE, null);<a name="line.213"></a>
+<span class="sourceLineNo">214</span> }<a name="line.214"></a>
+<span class="sourceLineNo">215</span><a name="line.215"></a>
+<span class="sourceLineNo">216</span> @VisibleForTesting<a name="line.216"></a>
+<span class="sourceLineNo">217</span> public WALKey(final byte[] encodedRegionName, final TableName tablename,<a name="line.217"></a>
+<span class="sourceLineNo">218</span> long logSeqNum,<a name="line.218"></a>
+<span class="sourceLineNo">219</span> final long now, UUID clusterId) {<a name="line.219"></a>
+<span class="sourceLineNo">220</span> List<UUID> clusterIds = new ArrayList<UUID>();<a name="line.220"></a>
+<span class="sourceLineNo">221</span> clusterIds.add(clusterId);<a name="line.221"></a>
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+<span class="sourceLineNo">223</span> HConstants.NO_NONCE, HConstants.NO_NONCE, null);<a name="line.223"></a>
+<span class="sourceLineNo">224</span> }<a name="line.224"></a>
+<span class="sourceLineNo">225</span><a name="line.225"></a>
+<span class="sourceLineNo">226</span> /**<a name="line.226"></a>
+<span class="sourceLineNo">227</span> * @deprecated Remove. Useless.<a name="line.227"></a>
+<span class="sourceLineNo">228</span> */<a name="line.228"></a>
+<span class="sourceLineNo">229</span> @Deprecated // REMOVE<a name="line.229"></a>
+<span class="sourceLineNo">230</span> public WALKey(final byte[] encodedRegionName, final TableName tablename) {<a name="line.230"></a>
+<span class="sourceLineNo">231</span> this(encodedRegionName, tablename, System.currentTimeMillis());<a name="line.231"></a>
+<span class="sourceLineNo">232</span> }<a name="line.232"></a>
+<span class="sourceLineNo">233</span><a name="line.233"></a>
+<span class="sourceLineNo">234</span> // TODO: Fix being able to pass in sequenceid.<a name="line.234"></a>
+<span class="sourceLineNo">235</span> public WALKey(final byte[] encodedRegionName, final TableName tablename, final long now) {<a name="line.235"></a>
+<span class="sourceLineNo">236</span> init(encodedRegionName,<a name="line.236"></a>
+<span class="sourceLineNo">237</span> tablename,<a name="line.237"></a>
+<span class="sourceLineNo">238</span> NO_SEQUENCE_ID,<a name="line.238"></a>
+<span class="sourceLineNo">239</span> now,<a name="line.239"></a>
+<span class="sourceLineNo">240</span> EMPTY_UUIDS,<a name="line.240"></a>
+<span class="sourceLineNo">241</span> HConstants.NO_NONCE,<a name="line.241"></a>
<span class="sourceLineNo">242</span> HConstants.NO_NONCE,<a name="line.242"></a>
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-<span class="sourceLineNo">244</span> mvcc);<a name="line.244"></a>
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-<span class="sourceLineNo">246</span><a name="line.246"></a>
-<span class="sourceLineNo">247</span> /**<a name="line.247"></a>
-<span class="sourceLineNo">248</span> * Create the log key for writing to somewhere.<a name="line.248"></a>
-<span class="sourceLineNo">249</span> * We maintain the tablename mainly for debugging purposes.<a name="line.249"></a>
-<span class="sourceLineNo">250</span> * A regionName is always a sub-table object.<a name="line.250"></a>
-<span class="sourceLineNo">251</span> * <p>Used by log splitting and snapshots.<a name="line.251"></a>
-<span class="sourceLineNo">252</span> *<a name="line.252"></a>
-<span class="sourceLineNo">253</span> * @param encodedRegionName Encoded name of the region as returned by<a name="line.253"></a>
-<span class="sourceLineNo">254</span> * <code>HRegionInfo#getEncodedNameAsBytes()</code>.<a name="line.254"></a>
-<span class="sourceLineNo">255</span> * @param tablename - name of table<a name="line.255"></a>
-<span class="sourceLineNo">256</span> * @param logSeqNum - log sequence number<a name="line.256"></a>
-<span class="sourceLineNo">257</span> * @param now Time at which this edit was written.<a name="line.257"></a>
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-<span class="sourceLineNo">266</span> long nonce,<a name="line.266"></a>
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-<span class="sourceLineNo">270</span><a name="line.270"></a>
-<span class="sourceLineNo">271</span> /**<a name="line.271"></a>
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-<span class="sourceLineNo">275</span> *<a name="line.275"></a>
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-<span class="sourceLineNo">279</span> * @param now Time at which this edit was written.<a name="line.279"></a>
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-<span class="sourceLineNo">282</span> * @param nonce<a name="line.282"></a>
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-<span class="sourceLineNo">290</span><a name="line.290"></a>
-<span class="sourceLineNo">291</span> /**<a name="line.291"></a>
-<span class="sourceLineNo">292</span> * Create the log key for writing to somewhere.<a name="line.292"></a>
-<span class="sourceLineNo">293</span> * We maintain the tablename mainly for debugging purposes.<a name="line.293"></a>
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-<span class="sourceLineNo">295</span> *<a name="line.295"></a>
-<span class="sourceLineNo">296</span> * @param encodedRegionName Encoded name of the region as returned by<a name="line.296"></a>
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-<span class="sourceLineNo">299</span> * @param logSeqNum<a name="line.299"></a>
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