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amar.kumar |
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/*
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* Copyright 2005 stat4j.org
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.sourceforge.stat4j.log4j;
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import net.sourceforge.stat4j.filter.LogInterceptor;
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import net.sourceforge.stat4j.filter.MetricCollector;
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import net.sourceforge.stat4j.util.Util;
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import org.apache.log4j.AppenderSkeleton;
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import org.apache.log4j.spi.LoggingEvent;
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/**
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* Name: Stat4JAppender.java
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* Date: Sep 1, 2004
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* Description:
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*
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* This log4j Appender is responsible for forwarding on all
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* log messages to the stat4j regexp statstic engine.
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*
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* Logs from stat4j classes will be ignored.
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*
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* @author Lara D'Abreo
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*/
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public class Stat4jAppender extends AppenderSkeleton {
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protected static String c;
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public Stat4jAppender() {
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c = Util.getCategory();
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}
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protected void append(LoggingEvent logEvent) {
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// dont scrap our own logs
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if (logEvent.categoryName.equals(c))
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return;
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if(LogInterceptor.shouldProcessLog(logEvent.getRenderedMessage())) {
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// direct log to metric capture mechanism
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Throwable cause = (logEvent.getThrowableInformation() == null)? null : logEvent.getThrowableInformation().getThrowable();
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MetricCollector.getInstance().applyLog(logEvent.getRenderedMessage(), cause);
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}
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}
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public boolean requiresLayout() {
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return false;
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}
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public void close() {
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MetricCollector.getInstance().close();
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}
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}
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