Java tutorial
/* * 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.handler.codec.http2; import static io.netty.handler.codec.http2.Http2FrameLogger.Direction.INBOUND; import static io.netty.util.internal.ObjectUtil.checkNotNull; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelHandlerContext; import io.netty.util.internal.UnstableApi; /** * Decorator around a {@link Http2FrameReader} that logs all inbound frames before calling * back the listener. */ @UnstableApi public class Http2InboundFrameLogger implements Http2FrameReader { private final Http2FrameReader reader; private final Http2FrameLogger logger; public Http2InboundFrameLogger(Http2FrameReader reader, Http2FrameLogger logger) { this.reader = checkNotNull(reader, "reader"); this.logger = checkNotNull(logger, "logger"); } @Override public void readFrame(ChannelHandlerContext ctx, ByteBuf input, final Http2FrameListener listener) throws Http2Exception { reader.readFrame(ctx, input, new Http2FrameListener() { @Override public int onDataRead(ChannelHandlerContext ctx, int streamId, ByteBuf data, int padding, boolean endOfStream) throws Http2Exception { logger.logData(INBOUND, ctx, streamId, data, padding, endOfStream); return listener.onDataRead(ctx, streamId, data, padding, endOfStream); } @Override public void onHeadersRead(ChannelHandlerContext ctx, int streamId, Http2Headers headers, int padding, boolean endStream) throws Http2Exception { logger.logHeaders(INBOUND, ctx, streamId, headers, padding, endStream); listener.onHeadersRead(ctx, streamId, headers, padding, endStream); } @Override public void onHeadersRead(ChannelHandlerContext ctx, int streamId, Http2Headers headers, int streamDependency, short weight, boolean exclusive, int padding, boolean endStream) throws Http2Exception { logger.logHeaders(INBOUND, ctx, streamId, headers, streamDependency, weight, exclusive, padding, endStream); listener.onHeadersRead(ctx, streamId, headers, streamDependency, weight, exclusive, padding, endStream); } @Override public void onPriorityRead(ChannelHandlerContext ctx, int streamId, int streamDependency, short weight, boolean exclusive) throws Http2Exception { logger.logPriority(INBOUND, ctx, streamId, streamDependency, weight, exclusive); listener.onPriorityRead(ctx, streamId, streamDependency, weight, exclusive); } @Override public void onRstStreamRead(ChannelHandlerContext ctx, int streamId, long errorCode) throws Http2Exception { logger.logRstStream(INBOUND, ctx, streamId, errorCode); listener.onRstStreamRead(ctx, streamId, errorCode); } @Override public void onSettingsAckRead(ChannelHandlerContext ctx) throws Http2Exception { logger.logSettingsAck(INBOUND, ctx); listener.onSettingsAckRead(ctx); } @Override public void onSettingsRead(ChannelHandlerContext ctx, Http2Settings settings) throws Http2Exception { logger.logSettings(INBOUND, ctx, settings); listener.onSettingsRead(ctx, settings); } @Override public void onPingRead(ChannelHandlerContext ctx, long data) throws Http2Exception { logger.logPing(INBOUND, ctx, data); listener.onPingRead(ctx, data); } @Override public void onPingAckRead(ChannelHandlerContext ctx, long data) throws Http2Exception { logger.logPingAck(INBOUND, ctx, data); listener.onPingAckRead(ctx, data); } @Override public void onPushPromiseRead(ChannelHandlerContext ctx, int streamId, int promisedStreamId, Http2Headers headers, int padding) throws Http2Exception { logger.logPushPromise(INBOUND, ctx, streamId, promisedStreamId, headers, padding); listener.onPushPromiseRead(ctx, streamId, promisedStreamId, headers, padding); } @Override public void onGoAwayRead(ChannelHandlerContext ctx, int lastStreamId, long errorCode, ByteBuf debugData) throws Http2Exception { logger.logGoAway(INBOUND, ctx, lastStreamId, errorCode, debugData); listener.onGoAwayRead(ctx, lastStreamId, errorCode, debugData); } @Override public void onWindowUpdateRead(ChannelHandlerContext ctx, int streamId, int windowSizeIncrement) throws Http2Exception { logger.logWindowsUpdate(INBOUND, ctx, streamId, windowSizeIncrement); listener.onWindowUpdateRead(ctx, streamId, windowSizeIncrement); } @Override public void onUnknownFrame(ChannelHandlerContext ctx, byte frameType, int streamId, Http2Flags flags, ByteBuf payload) throws Http2Exception { logger.logUnknownFrame(INBOUND, ctx, frameType, streamId, flags, payload); listener.onUnknownFrame(ctx, frameType, streamId, flags, payload); } }); } @Override public void close() { reader.close(); } @Override public Configuration configuration() { return reader.configuration(); } }