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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.wal;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.InterruptedIOException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.Map;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.concurrent.ConcurrentMap;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.ExecutionException;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.concurrent.Future;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.fs.Path;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.io.MultipleIOException;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.slf4j.Logger;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.slf4j.LoggerFactory;<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>/**<a name="line.37"></a>
<span class="sourceLineNo">038</span> * Class that manages the output streams from the log splitting process. Every region may have many<a name="line.38"></a>
<span class="sourceLineNo">039</span> * recovered edits file. But the opening writers is bounded. Bounded means the output streams will<a name="line.39"></a>
<span class="sourceLineNo">040</span> * be no more than the size of threadpool.<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>class BoundedRecoveredEditsOutputSink extends AbstractRecoveredEditsOutputSink {<a name="line.43"></a>
<span class="sourceLineNo">044</span> private static final Logger LOG = LoggerFactory.getLogger(BoundedRecoveredEditsOutputSink.class);<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span> // Since the splitting process may create multiple output files, we need a map<a name="line.46"></a>
<span class="sourceLineNo">047</span> // to track the output count of each region.<a name="line.47"></a>
<span class="sourceLineNo">048</span> private ConcurrentMap&lt;String, Long&gt; regionEditsWrittenMap = new ConcurrentHashMap&lt;&gt;();<a name="line.48"></a>
<span class="sourceLineNo">049</span> // Need a counter to track the opening writers.<a name="line.49"></a>
<span class="sourceLineNo">050</span> private final AtomicInteger openingWritersNum = new AtomicInteger(0);<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span> public BoundedRecoveredEditsOutputSink(WALSplitter walSplitter,<a name="line.52"></a>
<span class="sourceLineNo">053</span> WALSplitter.PipelineController controller, EntryBuffers entryBuffers, int numWriters) {<a name="line.53"></a>
<span class="sourceLineNo">054</span> super(walSplitter, controller, entryBuffers, numWriters);<a name="line.54"></a>
<span class="sourceLineNo">055</span> }<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span> @Override<a name="line.57"></a>
<span class="sourceLineNo">058</span> public void append(EntryBuffers.RegionEntryBuffer buffer) throws IOException {<a name="line.58"></a>
<span class="sourceLineNo">059</span> List&lt;WAL.Entry&gt; entries = buffer.entryBuffer;<a name="line.59"></a>
<span class="sourceLineNo">060</span> if (entries.isEmpty()) {<a name="line.60"></a>
<span class="sourceLineNo">061</span> LOG.warn("got an empty buffer, skipping");<a name="line.61"></a>
<span class="sourceLineNo">062</span> return;<a name="line.62"></a>
<span class="sourceLineNo">063</span> }<a name="line.63"></a>
<span class="sourceLineNo">064</span> // The key point is create a new writer, write edits then close writer.<a name="line.64"></a>
<span class="sourceLineNo">065</span> RecoveredEditsWriter writer = createRecoveredEditsWriter(buffer.tableName,<a name="line.65"></a>
<span class="sourceLineNo">066</span> buffer.encodedRegionName, entries.get(0).getKey().getSequenceId());<a name="line.66"></a>
<span class="sourceLineNo">067</span> if (writer != null) {<a name="line.67"></a>
<span class="sourceLineNo">068</span> openingWritersNum.incrementAndGet();<a name="line.68"></a>
<span class="sourceLineNo">069</span> writer.writeRegionEntries(entries);<a name="line.69"></a>
<span class="sourceLineNo">070</span> regionEditsWrittenMap.compute(Bytes.toString(buffer.encodedRegionName),<a name="line.70"></a>
<span class="sourceLineNo">071</span> (k, v) -&gt; v == null ? writer.editsWritten : v + writer.editsWritten);<a name="line.71"></a>
<span class="sourceLineNo">072</span> List&lt;IOException&gt; thrown = new ArrayList&lt;&gt;();<a name="line.72"></a>
<span class="sourceLineNo">073</span> Path dst = closeRecoveredEditsWriter(writer, thrown);<a name="line.73"></a>
<span class="sourceLineNo">074</span> splits.add(dst);<a name="line.74"></a>
<span class="sourceLineNo">075</span> openingWritersNum.decrementAndGet();<a name="line.75"></a>
<span class="sourceLineNo">076</span> if (!thrown.isEmpty()) {<a name="line.76"></a>
<span class="sourceLineNo">077</span> throw MultipleIOException.createIOException(thrown);<a name="line.77"></a>
<span class="sourceLineNo">078</span> }<a name="line.78"></a>
<span class="sourceLineNo">079</span> }<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 List&lt;Path&gt; close() throws IOException {<a name="line.83"></a>
<span class="sourceLineNo">084</span> boolean isSuccessful = true;<a name="line.84"></a>
<span class="sourceLineNo">085</span> try {<a name="line.85"></a>
<span class="sourceLineNo">086</span> isSuccessful = finishWriterThreads();<a name="line.86"></a>
<span class="sourceLineNo">087</span> } finally {<a name="line.87"></a>
<span class="sourceLineNo">088</span> isSuccessful &amp;= writeRemainingEntryBuffers();<a name="line.88"></a>
<span class="sourceLineNo">089</span> }<a name="line.89"></a>
<span class="sourceLineNo">090</span> return isSuccessful ? splits : null;<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> /**<a name="line.93"></a>
<span class="sourceLineNo">094</span> * Write out the remaining RegionEntryBuffers and close the writers.<a name="line.94"></a>
<span class="sourceLineNo">095</span> * @return true when there is no error.<a name="line.95"></a>
<span class="sourceLineNo">096</span> */<a name="line.96"></a>
<span class="sourceLineNo">097</span> private boolean writeRemainingEntryBuffers() throws IOException {<a name="line.97"></a>
<span class="sourceLineNo">098</span> for (EntryBuffers.RegionEntryBuffer buffer : entryBuffers.buffers.values()) {<a name="line.98"></a>
<span class="sourceLineNo">099</span> closeCompletionService.submit(() -&gt; {<a name="line.99"></a>
<span class="sourceLineNo">100</span> append(buffer);<a name="line.100"></a>
<span class="sourceLineNo">101</span> return null;<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> boolean progressFailed = false;<a name="line.104"></a>
<span class="sourceLineNo">105</span> try {<a name="line.105"></a>
<span class="sourceLineNo">106</span> for (int i = 0, n = entryBuffers.buffers.size(); i &lt; n; i++) {<a name="line.106"></a>
<span class="sourceLineNo">107</span> Future&lt;Void&gt; future = closeCompletionService.take();<a name="line.107"></a>
<span class="sourceLineNo">108</span> future.get();<a name="line.108"></a>
<span class="sourceLineNo">109</span> if (!progressFailed &amp;&amp; reporter != null &amp;&amp; !reporter.progress()) {<a name="line.109"></a>
<span class="sourceLineNo">110</span> progressFailed = true;<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> } catch (InterruptedException e) {<a name="line.113"></a>
<span class="sourceLineNo">114</span> IOException iie = new InterruptedIOException();<a name="line.114"></a>
<span class="sourceLineNo">115</span> iie.initCause(e);<a name="line.115"></a>
<span class="sourceLineNo">116</span> throw iie;<a name="line.116"></a>
<span class="sourceLineNo">117</span> } catch (ExecutionException e) {<a name="line.117"></a>
<span class="sourceLineNo">118</span> throw new IOException(e.getCause());<a name="line.118"></a>
<span class="sourceLineNo">119</span> } finally {<a name="line.119"></a>
<span class="sourceLineNo">120</span> closeThreadPool.shutdownNow();<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span> return !progressFailed;<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 Map&lt;String, Long&gt; getOutputCounts() {<a name="line.126"></a>
<span class="sourceLineNo">127</span> return regionEditsWrittenMap;<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>
<span class="sourceLineNo">130</span> @Override<a name="line.130"></a>
<span class="sourceLineNo">131</span> public int getNumberOfRecoveredRegions() {<a name="line.131"></a>
<span class="sourceLineNo">132</span> return regionEditsWrittenMap.size();<a name="line.132"></a>
<span class="sourceLineNo">133</span> }<a name="line.133"></a>
<span class="sourceLineNo">134</span><a name="line.134"></a>
<span class="sourceLineNo">135</span> @Override<a name="line.135"></a>
<span class="sourceLineNo">136</span> int getNumOpenWriters() {<a name="line.136"></a>
<span class="sourceLineNo">137</span> return openingWritersNum.get();<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>
</pre>
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