io.reactivex.netty.protocol.http.websocket.WebSocketServerPipelineConfigurator Maven / Gradle / Ivy

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rx-netty developed by Netflix

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/*
 * Copyright 2014 Netflix, Inc.
 *
 * Licensed 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.reactivex.netty.protocol.http.websocket;

import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerHandshakerFactory;
import io.reactivex.netty.metrics.MetricEventsSubject;
import io.reactivex.netty.pipeline.PipelineConfigurator;
import io.reactivex.netty.server.ServerMetricsEvent;

/**
 * Initial channel setup contains HTTP handlers together with {@link WebSocketServerHandler}
 * for WebSocket handshake orchestration. Once handshake is done, the channel is dynamically reconfigured.
 *
 * @author Tomasz Bak
 */
public class WebSocketServerPipelineConfigurator implements PipelineConfigurator {
    private final String webSocketURI;
    private final String subprotocols;
    private final boolean allowExtensions;
    private final int maxFramePayloadLength;
    private final boolean messageAggregator;
    private MetricEventsSubject> eventsSubject;

    public WebSocketServerPipelineConfigurator(String webSocketURI, String subprotocols,
                                               boolean allowExtensions, int maxFramePayloadLength,
                                               boolean messageAggregator) {
        this.webSocketURI = webSocketURI;
        this.subprotocols = subprotocols;
        this.allowExtensions = allowExtensions;
        this.maxFramePayloadLength = maxFramePayloadLength;
        this.messageAggregator = messageAggregator;
    }

    @Override
    public void configureNewPipeline(ChannelPipeline pipeline) {
        WebSocketServerHandshakerFactory handshakeHandlerFactory = new WebSocketServerHandshakerFactory(
                webSocketURI, subprotocols, allowExtensions, maxFramePayloadLength);

        pipeline.addLast(new HttpServerCodec());
        pipeline.addLast(new HttpObjectAggregator(65536));
        pipeline.addLast(new WebSocketServerHandler(
                handshakeHandlerFactory, maxFramePayloadLength, messageAggregator, eventsSubject));
    }

    void useMetricEventsSubject(MetricEventsSubject> eventsSubject) {
        this.eventsSubject = eventsSubject;
    }
}