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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 or more<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache license, Version 2.0<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * the License. You may obtain a copy of the License at<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> *<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * See the license for the specific language governing permissions and<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * limitations under the license.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> */<a name="line.16"></a> |
| <span class="sourceLineNo">017</span>package org.apache.logging.log4j.core.async;<a name="line.17"></a> |
| <span class="sourceLineNo">018</span><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>import com.lmax.disruptor.LifecycleAware;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import com.lmax.disruptor.Sequence;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import com.lmax.disruptor.SequenceReportingEventHandler;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>/**<a name="line.23"></a> |
| <span class="sourceLineNo">024</span> * This event handler gets passed messages from the RingBuffer as they become<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> * available. Processing of these messages is done in a separate thread,<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * controlled by the {@code Executor} passed to the {@code Disruptor}<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> * constructor.<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> */<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>public class RingBufferLogEventHandler implements<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> SequenceReportingEventHandler<RingBufferLogEvent>, LifecycleAware {<a name="line.30"></a> |
| <span class="sourceLineNo">031</span><a name="line.31"></a> |
| <span class="sourceLineNo">032</span> private static final int NOTIFY_PROGRESS_THRESHOLD = 50;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> private Sequence sequenceCallback;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> private int counter;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> private long threadId = -1;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> @Override<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> public void setSequenceCallback(final Sequence sequenceCallback) {<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> this.sequenceCallback = sequenceCallback;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> }<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> @Override<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> public void onEvent(final RingBufferLogEvent event, final long sequence,<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> final boolean endOfBatch) throws Exception {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> try {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> event.execute(endOfBatch);<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> }<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> finally {<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> event.clear();<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> // notify the BatchEventProcessor that the sequence has progressed.<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> // Without this callback the sequence would not be progressed<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> // until the batch has completely finished.<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> notifyCallback(sequence);<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 name="line.56"></a> |
| <span class="sourceLineNo">057</span> private void notifyCallback(long sequence) {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> if (++counter > NOTIFY_PROGRESS_THRESHOLD) {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> sequenceCallback.set(sequence);<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> counter = 0;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> }<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> }<a name="line.62"></a> |
| <span class="sourceLineNo">063</span><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> /**<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * Returns the thread ID of the background consumer thread, or {@code -1} if the background thread has not started<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * yet.<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * @return the thread ID of the background consumer thread, or {@code -1}<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> */<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> public long getThreadId() {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> return threadId;<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> }<a name="line.71"></a> |
| <span class="sourceLineNo">072</span><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> @Override<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> public void onStart() {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> threadId = Thread.currentThread().getId();<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> }<a name="line.76"></a> |
| <span class="sourceLineNo">077</span><a name="line.77"></a> |
| <span class="sourceLineNo">078</span> @Override<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> public void onShutdown() {<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> |
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