org.springframework.boot.rsocket.netty.NettyRSocketServer.java Source code

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Here is the source code for org.springframework.boot.rsocket.netty.NettyRSocketServer.java

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/*
 * Copyright 2012-2019 the original author or authors.
 *
 * 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
 *
 *      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 org.springframework.boot.rsocket.netty;

import java.net.InetSocketAddress;
import java.time.Duration;

import io.rsocket.transport.netty.server.CloseableChannel;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import reactor.core.publisher.Mono;

import org.springframework.boot.rsocket.server.RSocketServer;
import org.springframework.boot.rsocket.server.RSocketServerException;
import org.springframework.util.Assert;

/**
 * {@link RSocketServer} that is based on a Reactor Netty server. Usually this class
 * should be created using the {@link NettyRSocketServerFactory} and not directly.
 *
 * @author Brian Clozel
 * @since 2.2.0
 */
public class NettyRSocketServer implements RSocketServer {

    private static final Log logger = LogFactory.getLog(NettyRSocketServer.class);

    private final Mono<CloseableChannel> starter;

    private final Duration lifecycleTimeout;

    private CloseableChannel channel;

    public NettyRSocketServer(Mono<CloseableChannel> starter, Duration lifecycleTimeout) {
        Assert.notNull(starter, "starter must not be null");
        this.starter = starter;
        this.lifecycleTimeout = lifecycleTimeout;
    }

    @Override
    public InetSocketAddress address() {
        if (this.channel != null) {
            return this.channel.address();
        }
        return null;
    }

    @Override
    public void start() throws RSocketServerException {
        if (this.lifecycleTimeout != null) {
            this.channel = this.starter.block(this.lifecycleTimeout);
        } else {
            this.channel = this.starter.block();
        }
        logger.info("Netty RSocket started on port(s): " + address().getPort());
        startDaemonAwaitThread(this.channel);
    }

    private void startDaemonAwaitThread(CloseableChannel channel) {
        Thread awaitThread = new Thread("rsocket") {

            @Override
            public void run() {
                channel.onClose().block();
            }

        };
        awaitThread.setContextClassLoader(getClass().getClassLoader());
        awaitThread.setDaemon(false);
        awaitThread.start();
    }

    @Override
    public void stop() throws RSocketServerException {
        if (this.channel != null) {
            this.channel.dispose();
            this.channel = null;
        }
    }

}