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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.layout;<a name="line.17"></a> |
| <span class="sourceLineNo">018</span><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>import java.nio.ByteBuffer;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.logging.log4j.core.appender.OutputStreamManager;<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> * ByteBufferDestination is the destination that {@link Encoder}s write binary data to. It encapsulates a<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> * {@code ByteBuffer} and a {@code drain()} method the producer can call when the {@code ByteBuffer} is full.<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * <p><a name="line.26"></a> |
| <span class="sourceLineNo">027</span> * This interface allows a producer to write arbitrary amounts of data to a destination.<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * </p><a name="line.28"></a> |
| <span class="sourceLineNo">029</span> * @since 2.6<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> */<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>public interface ByteBufferDestination {<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> /**<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * Returns the buffer to write to.<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> *<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * @return the buffer to write to<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> */<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> ByteBuffer getByteBuffer();<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> * Consumes the buffer content and returns a buffer with more {@linkplain ByteBuffer#remaining() available} space<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * (which may or may not be the same instance).<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * <p><a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * Called by the producer when buffer becomes too full to write to.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> *<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * @param buf the buffer to drain<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * @return a buffer with more available space (which may or may not be the same instance)<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> */<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> ByteBuffer drain(ByteBuffer buf);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> /**<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * Writes the given data to this ByteBufferDestination entirely. Call of this method should *not* be protected<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * with synchronized on this ByteBufferDestination instance. ByteBufferDestination implementations should<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * synchronize themselves inside this method, if needed.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> *<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * @since 2.9 (see LOG4J2-1874)<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> */<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> void writeBytes(ByteBuffer data);<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> /**<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * Writes the given data to this ByteBufferDestination. Call of this method should *not* be protected with<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * synchronized on this ByteBufferDestination instance. ByteBufferDestination implementations should<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * synchronize themselves inside this method, if needed.<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * <p><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> * This method should behave identically to {@code writeBytes(ByteBuffer.wrap(data, offset, length)}.<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * It is provided to allow callers not to generate extra garbage.<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * <p><a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * This method is called writeBytes() to avoid clashing with {@link OutputStreamManager#write(byte[], int, int)},<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * which might be overridden in user-defined subclasses as protected, hence adding it to interface and requiring<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * the method to be public breaks source compatibility.<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> *<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * @since 2.9 (see LOG4J2-1874)<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> */<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> void writeBytes(byte[] data, int offset, int length);<a name="line.73"></a> |
| <span class="sourceLineNo">074</span>}<a name="line.74"></a> |
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