com.avanza.astrix.netty.client.NettyRemotingClient.java Source code

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Here is the source code for com.avanza.astrix.netty.client.NettyRemotingClient.java

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/*
 * Copyright 2014 Avanza Bank AB
 *
 * 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 com.avanza.astrix.netty.client;

import java.util.concurrent.TimeUnit;

import com.avanza.astrix.remoting.client.AstrixServiceInvocationRequest;
import com.avanza.astrix.remoting.client.AstrixServiceInvocationResponse;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.serialization.ClassResolvers;
import io.netty.handler.codec.serialization.ObjectDecoder;
import io.netty.handler.codec.serialization.ObjectEncoder;
import rx.Observable;

public final class NettyRemotingClient {

    private final EventLoopGroup group = new NioEventLoopGroup();
    private final NettyRemotingClientHandler nettyRemotingClientHandler = new NettyRemotingClientHandler();

    public void connect(String host, int port) {
        Bootstrap b = new Bootstrap();
        b.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {
            @Override
            public void initChannel(SocketChannel ch) throws Exception {
                ChannelPipeline p = ch.pipeline();
                p.addLast(new ObjectEncoder(), new ObjectDecoder(ClassResolvers.cacheDisabled(null)),
                        nettyRemotingClientHandler);
            }
        });

        // Start the connection attempt.
        ChannelFuture channel = b.connect(host, port);
        try {
            if (channel.await(1, TimeUnit.SECONDS)) {
                if (channel.isSuccess()) {
                    return;
                }
            }
        } catch (InterruptedException e) {
        }
        destroy();
        throw new IllegalArgumentException(
                String.format("Failed to connect to remoting server: %s:%d", host, port));
    }

    public Observable<AstrixServiceInvocationResponse> invokeService(AstrixServiceInvocationRequest request) {
        return nettyRemotingClientHandler.sendInvocationRequest(request);
    }

    public void destroy() {
        group.shutdownGracefully();
    }

}