/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.log4j.helpers;
import java.io.Writer;
import java.io.FilterWriter;
import java.io.IOException;
import org.apache.log4j.spi.ErrorHandler;
import org.apache.log4j.spi.ErrorCode;
/**
QuietWriter does not throw exceptions when things go
wrong. Instead, it delegates error handling to its {@link ErrorHandler}.
@author Ceki Gülcü
@since 0.7.3
*/
public class QuietWriter extends FilterWriter {
protected ErrorHandler errorHandler;
public
QuietWriter(Writer writer, ErrorHandler errorHandler) {
super(writer);
setErrorHandler(errorHandler);
}
public
void write(String string) {
try {
out.write(string);
} catch(IOException e) {
errorHandler.error("Failed to write ["+string+"].", e,
ErrorCode.WRITE_FAILURE);
}
}
public
void flush() {
try {
out.flush();
} catch(IOException e) {
errorHandler.error("Failed to flush writer,", e,
ErrorCode.FLUSH_FAILURE);
}
}
public
void setErrorHandler(ErrorHandler eh) {
if(eh == null) {
// This is a programming error on the part of the enclosing appender.
throw new IllegalArgumentException("Attempted to set null ErrorHandler.");
} else {
this.errorHandler = eh;
}
}
}
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