com.linecorp.armeria.internal.TrafficLoggingHandler.java Source code

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Here is the source code for com.linecorp.armeria.internal.TrafficLoggingHandler.java

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/*
 * Copyright 2016 LINE Corporation
 *
 * LINE Corporation 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:
 *
 *   https://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 com.linecorp.armeria.internal;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;

/**
 * A Netty handler that logs the I/O traffic of a connection.
 */
public final class TrafficLoggingHandler extends LoggingHandler {

    public static final TrafficLoggingHandler SERVER = new TrafficLoggingHandler(true);
    public static final TrafficLoggingHandler CLIENT = new TrafficLoggingHandler(false);

    private TrafficLoggingHandler(boolean server) {
        super("com.linecorp.armeria.logging.traffic." + (server ? "server" : "client"), LogLevel.TRACE);
    }

    @Override
    public void channelRegistered(ChannelHandlerContext ctx) throws Exception {
        ctx.fireChannelRegistered();
    }

    @Override
    public void channelUnregistered(ChannelHandlerContext ctx) throws Exception {
        ctx.fireChannelUnregistered();
    }

    @Override
    public void flush(ChannelHandlerContext ctx) throws Exception {
        ctx.flush();
    }

    @Override
    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        if (msg instanceof ByteBuf && !((ByteBuf) msg).isReadable()) {
            ctx.write(msg, promise);
        } else {
            super.write(ctx, msg, promise);
        }
    }
}