SpdySessionHandler.java — netty Source File

Source Code

/*
 * Copyright 2013 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:
 *
 *   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 io.netty.handler.codec.spdy;

import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.util.internal.ObjectUtil;

import java.util.concurrent.atomic.AtomicInteger;

import static io.netty.handler.codec.spdy.SpdyCodecUtil.SPDY_SESSION_STREAM_ID;
import static io.netty.handler.codec.spdy.SpdyCodecUtil.isServerId;
import static io.netty.util.internal.ObjectUtil.checkPositiveOrZero;

/**
 * Manages streams within a SPDY session.
 */
public class SpdySessionHandler extends ChannelDuplexHandler {

    private static final SpdyProtocolException PROTOCOL_EXCEPTION =
            SpdyProtocolException.newStatic(null, SpdySessionHandler.class, "handleOutboundMessage(...)");
    private static final SpdyProtocolException STREAM_CLOSED =
            SpdyProtocolException.newStatic("Stream closed", SpdySessionHandler.class, "removeStream(...)");

    private static final int DEFAULT_WINDOW_SIZE = 64 * 1024; // 64 KB default initial window size
    private int initialSendWindowSize    = DEFAULT_WINDOW_SIZE;
    private int initialReceiveWindowSize = DEFAULT_WINDOW_SIZE;
    private volatile int initialSessionReceiveWindowSize = DEFAULT_WINDOW_SIZE;

    private final SpdySession spdySession = new SpdySession(initialSendWindowSize, initialReceiveWindowSize);
    private int lastGoodStreamId;

    private static final int DEFAULT_MAX_CONCURRENT_STREAMS = Integer.MAX_VALUE;
    private int remoteConcurrentStreams = DEFAULT_MAX_CONCURRENT_STREAMS;
    private int localConcurrentStreams  = DEFAULT_MAX_CONCURRENT_STREAMS;

    private final AtomicInteger pings = new AtomicInteger();

    private boolean sentGoAwayFrame;
    private boolean receivedGoAwayFrame;

    private ChannelFutureListener closeSessionFutureListener;

    private final boolean server;
// ... (782 more lines)