io.netty.example.spdy.client.SpdyFrameLogger Maven / Gradle / Ivy
/*
* Copyright 2014 The Netty Project
*
* The Netty Project 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 io.netty.example.spdy.client;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.spdy.SpdyFrame;
import io.netty.util.internal.logging.InternalLogLevel;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
/**
* Logs SPDY frames for debugging purposes.
*/
public class SpdyFrameLogger extends ChannelDuplexHandler {
private enum Direction {
INBOUND, OUTBOUND
}
protected final InternalLogger logger;
private final InternalLogLevel level;
public SpdyFrameLogger(InternalLogLevel level) {
if (level == null) {
throw new NullPointerException("level");
}
logger = InternalLoggerFactory.getInstance(getClass());
this.level = level;
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
if (acceptMessage(msg)) {
log((SpdyFrame) msg, Direction.INBOUND);
}
ctx.fireChannelRead(msg);
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) {
if (acceptMessage(msg)) {
log((SpdyFrame) msg, Direction.OUTBOUND);
}
ctx.write(msg, promise);
}
private static boolean acceptMessage(Object msg) {
return msg instanceof SpdyFrame;
}
private void log(SpdyFrame msg, Direction d) {
if (logger.isEnabled(level)) {
StringBuilder b = new StringBuilder(200)
.append("\n----------------")
.append(d.name())
.append("--------------------\n")
.append(msg)
.append("\n------------------------------------");
logger.log(level, b.toString());
}
}
}