2.13.0/log4j-1.2-api/apidocs/src-html/org/apache/log4j/helpers/QuietWriter.html - logging-log4j-site - Git at Google

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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><a name="line.17"></a>
 <span class="sourceLineNo">018</span>package org.apache.log4j.helpers;<a name="line.18"></a>
 <span class="sourceLineNo">019</span><a name="line.19"></a>
 <span class="sourceLineNo">020</span>import org.apache.log4j.spi.ErrorCode;<a name="line.20"></a>
 <span class="sourceLineNo">021</span>import org.apache.log4j.spi.ErrorHandler;<a name="line.21"></a>
 <span class="sourceLineNo">022</span><a name="line.22"></a>
 <span class="sourceLineNo">023</span>import java.io.FilterWriter;<a name="line.23"></a>
 <span class="sourceLineNo">024</span>import java.io.Writer;<a name="line.24"></a>
 <span class="sourceLineNo">025</span><a name="line.25"></a>
 <span class="sourceLineNo">026</span><a name="line.26"></a>
 <span class="sourceLineNo">027</span>/**<a name="line.27"></a>
 <span class="sourceLineNo">028</span> * QuietWriter does not throw exceptions when things go<a name="line.28"></a>
 <span class="sourceLineNo">029</span> * wrong. Instead, it delegates error handling to its {@link ErrorHandler}.<a name="line.29"></a>
 <span class="sourceLineNo">030</span> */<a name="line.30"></a>
 <span class="sourceLineNo">031</span>public class QuietWriter extends FilterWriter {<a name="line.31"></a>
 <span class="sourceLineNo">032</span><a name="line.32"></a>
 <span class="sourceLineNo">033</span>    protected ErrorHandler errorHandler;<a name="line.33"></a>
 <span class="sourceLineNo">034</span><a name="line.34"></a>
 <span class="sourceLineNo">035</span>    public QuietWriter(Writer writer, ErrorHandler errorHandler) {<a name="line.35"></a>
 <span class="sourceLineNo">036</span>        super(writer);<a name="line.36"></a>
 <span class="sourceLineNo">037</span>        setErrorHandler(errorHandler);<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>    public void write(String string) {<a name="line.40"></a>
 <span class="sourceLineNo">041</span>        if (string != null) {<a name="line.41"></a>
 <span class="sourceLineNo">042</span>            try {<a name="line.42"></a>
 <span class="sourceLineNo">043</span>                out.write(string);<a name="line.43"></a>
 <span class="sourceLineNo">044</span>            } catch (Exception e) {<a name="line.44"></a>
 <span class="sourceLineNo">045</span>                errorHandler.error("Failed to write [" + string + "].", e,<a name="line.45"></a>
 <span class="sourceLineNo">046</span>                        ErrorCode.WRITE_FAILURE);<a name="line.46"></a>
 <span class="sourceLineNo">047</span>            }<a name="line.47"></a>
 <span class="sourceLineNo">048</span>        }<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>    public void flush() {<a name="line.51"></a>
 <span class="sourceLineNo">052</span>        try {<a name="line.52"></a>
 <span class="sourceLineNo">053</span>            out.flush();<a name="line.53"></a>
 <span class="sourceLineNo">054</span>        } catch (Exception e) {<a name="line.54"></a>
 <span class="sourceLineNo">055</span>            errorHandler.error("Failed to flush writer,", e,<a name="line.55"></a>
 <span class="sourceLineNo">056</span>                    ErrorCode.FLUSH_FAILURE);<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 name="line.59"></a>
 <span class="sourceLineNo">060</span><a name="line.60"></a>
 <span class="sourceLineNo">061</span>    public void setErrorHandler(ErrorHandler eh) {<a name="line.61"></a>
 <span class="sourceLineNo">062</span>        if (eh == null) {<a name="line.62"></a>
 <span class="sourceLineNo">063</span>            // This is a programming error on the part of the enclosing appender.<a name="line.63"></a>
 <span class="sourceLineNo">064</span>            throw new IllegalArgumentException("Attempted to set null ErrorHandler.");<a name="line.64"></a>
 <span class="sourceLineNo">065</span>        } else {<a name="line.65"></a>
 <span class="sourceLineNo">066</span>            this.errorHandler = eh;<a name="line.66"></a>
 <span class="sourceLineNo">067</span>        }<a name="line.67"></a>
 <span class="sourceLineNo">068</span>    }<a name="line.68"></a>
 <span class="sourceLineNo">069</span>}<a name="line.69"></a>


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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><a name="line.17"></a>
	<span class="sourceLineNo">018</span>package org.apache.log4j.helpers;<a name="line.18"></a>
	<span class="sourceLineNo">019</span><a name="line.19"></a>
	<span class="sourceLineNo">020</span>import org.apache.log4j.spi.ErrorCode;<a name="line.20"></a>
	<span class="sourceLineNo">021</span>import org.apache.log4j.spi.ErrorHandler;<a name="line.21"></a>
	<span class="sourceLineNo">022</span><a name="line.22"></a>
	<span class="sourceLineNo">023</span>import java.io.FilterWriter;<a name="line.23"></a>
	<span class="sourceLineNo">024</span>import java.io.Writer;<a name="line.24"></a>
	<span class="sourceLineNo">025</span><a name="line.25"></a>
	<span class="sourceLineNo">026</span><a name="line.26"></a>
	<span class="sourceLineNo">027</span>/**<a name="line.27"></a>
	<span class="sourceLineNo">028</span> * QuietWriter does not throw exceptions when things go<a name="line.28"></a>
	<span class="sourceLineNo">029</span> * wrong. Instead, it delegates error handling to its {@link ErrorHandler}.<a name="line.29"></a>
	<span class="sourceLineNo">030</span> */<a name="line.30"></a>
	<span class="sourceLineNo">031</span>public class QuietWriter extends FilterWriter {<a name="line.31"></a>
	<span class="sourceLineNo">032</span><a name="line.32"></a>
	<span class="sourceLineNo">033</span> protected ErrorHandler errorHandler;<a name="line.33"></a>
	<span class="sourceLineNo">034</span><a name="line.34"></a>
	<span class="sourceLineNo">035</span> public QuietWriter(Writer writer, ErrorHandler errorHandler) {<a name="line.35"></a>
	<span class="sourceLineNo">036</span> super(writer);<a name="line.36"></a>
	<span class="sourceLineNo">037</span> setErrorHandler(errorHandler);<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> public void write(String string) {<a name="line.40"></a>
	<span class="sourceLineNo">041</span> if (string != null) {<a name="line.41"></a>
	<span class="sourceLineNo">042</span> try {<a name="line.42"></a>
	<span class="sourceLineNo">043</span> out.write(string);<a name="line.43"></a>
	<span class="sourceLineNo">044</span> } catch (Exception e) {<a name="line.44"></a>
	<span class="sourceLineNo">045</span> errorHandler.error("Failed to write [" + string + "].", e,<a name="line.45"></a>
	<span class="sourceLineNo">046</span> ErrorCode.WRITE_FAILURE);<a name="line.46"></a>
	<span class="sourceLineNo">047</span> }<a name="line.47"></a>
	<span class="sourceLineNo">048</span> }<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> public void flush() {<a name="line.51"></a>
	<span class="sourceLineNo">052</span> try {<a name="line.52"></a>
	<span class="sourceLineNo">053</span> out.flush();<a name="line.53"></a>
	<span class="sourceLineNo">054</span> } catch (Exception e) {<a name="line.54"></a>
	<span class="sourceLineNo">055</span> errorHandler.error("Failed to flush writer,", e,<a name="line.55"></a>
	<span class="sourceLineNo">056</span> ErrorCode.FLUSH_FAILURE);<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 name="line.59"></a>
	<span class="sourceLineNo">060</span><a name="line.60"></a>
	<span class="sourceLineNo">061</span> public void setErrorHandler(ErrorHandler eh) {<a name="line.61"></a>
	<span class="sourceLineNo">062</span> if (eh == null) {<a name="line.62"></a>
	<span class="sourceLineNo">063</span> // This is a programming error on the part of the enclosing appender.<a name="line.63"></a>
	<span class="sourceLineNo">064</span> throw new IllegalArgumentException("Attempted to set null ErrorHandler.");<a name="line.64"></a>
	<span class="sourceLineNo">065</span> } else {<a name="line.65"></a>
	<span class="sourceLineNo">066</span> this.errorHandler = eh;<a name="line.66"></a>
	<span class="sourceLineNo">067</span> }<a name="line.67"></a>
	<span class="sourceLineNo">068</span> }<a name="line.68"></a>
	<span class="sourceLineNo">069</span>}<a name="line.69"></a>




























































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