001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017 package org.apache.logging.log4j.flume.appender; 018 019 import org.apache.flume.ChannelException; 020 import org.apache.flume.EventDrivenSource; 021 import org.apache.flume.instrumentation.SourceCounter; 022 import org.apache.flume.source.AbstractSource; 023 import org.slf4j.LoggerFactory; 024 import org.slf4j.Logger; 025 026 /** 027 * 028 */ 029 public class Log4jEventSource extends AbstractSource implements EventDrivenSource { 030 031 private SourceCounter sourceCounter = new SourceCounter("log4j"); 032 033 private static final Logger logger = LoggerFactory.getLogger(Log4jEventSource.class); 034 035 public Log4jEventSource() { 036 setName("Log4jEvent"); 037 } 038 039 @Override 040 public synchronized void start() { 041 super.start(); 042 043 logger.info("Log4j Source started"); 044 } 045 046 @Override 047 public synchronized void stop() { 048 super.stop(); 049 050 logger.info("Log4j Source stopped. Metrics {}", sourceCounter); 051 } 052 053 054 public void send(FlumeEvent event) { 055 sourceCounter.incrementAppendReceivedCount(); 056 sourceCounter.incrementEventReceivedCount(); 057 try { 058 getChannelProcessor().processEvent(event); 059 } catch (ChannelException ex) { 060 logger.warn("Unabled to process event {}" + event, ex); 061 throw ex; 062 } 063 sourceCounter.incrementAppendAcceptedCount(); 064 sourceCounter.incrementEventAcceptedCount(); 065 } 066 }