spark NettyLogger 源码
spark NettyLogger 代码
文件路径：/common/network-common/src/main/java/org/apache/spark/network/util/NettyLogger.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.network.util;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufHolder;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.logging.LogLevel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class NettyLogger {
private static final Logger logger = LoggerFactory.getLogger(NettyLogger.class);
/** A Netty LoggingHandler which does not dump the message contents. */
private static class NoContentLoggingHandler extends LoggingHandler {
NoContentLoggingHandler(Class<?> clazz, LogLevel level) {
super(clazz, level);
}
@Override
protected String format(ChannelHandlerContext ctx, String eventName, Object arg) {
if (arg instanceof ByteBuf) {
return format(ctx, eventName) + " " + ((ByteBuf) arg).readableBytes() + "B";
} else if (arg instanceof ByteBufHolder) {
return format(ctx, eventName) + " " +
((ByteBufHolder) arg).content().readableBytes() + "B";
} else {
return super.format(ctx, eventName, arg);
}
}
}
private final LoggingHandler loggingHandler;
public NettyLogger() {
if (logger.isTraceEnabled()) {
loggingHandler = new LoggingHandler(NettyLogger.class, LogLevel.TRACE);
} else if (logger.isDebugEnabled()) {
loggingHandler = new NoContentLoggingHandler(NettyLogger.class, LogLevel.DEBUG);
} else {
loggingHandler = null;
}
}
public LoggingHandler getLoggingHandler() {
return loggingHandler;
}
}
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