openflowjava/openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/TcpConnectionInitializer.java

   1 /*
   2  * Copyright (c) 2015 Pantheon Technologies s.r.o. and others. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.openflowjava.protocol.impl.core;
  10
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.util.concurrent.ListenableFuture;
  13 import com.google.common.util.concurrent.SettableFuture;
  14 import io.netty.bootstrap.Bootstrap;
  15 import io.netty.channel.EventLoopGroup;
  16 import io.netty.channel.epoll.EpollSocketChannel;
  17 import io.netty.channel.socket.nio.NioSocketChannel;
  18 import org.opendaylight.openflowjava.protocol.api.connection.ThreadConfiguration;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21
  22 /**
  23  * Initializes (TCP) connection to device.
  24  *
  25  * @author martin.uhlir
  26  */
  27 public class TcpConnectionInitializer implements ServerFacade, ConnectionInitializer {
  28
  29     private static final Logger LOG = LoggerFactory.getLogger(TcpConnectionInitializer.class);
  30
  31     private final EventLoopGroup workerGroup;
  32     private final boolean isEpollEnabled;
  33     private final SettableFuture<Boolean> hasRun = SettableFuture.create();
  34
  35     private TcpChannelInitializer channelInitializer;
  36     private Bootstrap bootstrap;
  37
  38     /**
  39      * Constructor.
  40      *
  41      * @param workerGroup - shared worker group
  42      */
  43     public TcpConnectionInitializer(EventLoopGroup workerGroup, boolean isEpollEnabled) {
  44         Preconditions.checkNotNull(workerGroup, "WorkerGroup can't be null");
  45         this.workerGroup = workerGroup;
  46         this.isEpollEnabled = isEpollEnabled;
  47     }
  48
  49     @Override
  50     public void run() {
  51         bootstrap = new Bootstrap();
  52         if (isEpollEnabled) {
  53             bootstrap.group(workerGroup).channel(EpollSocketChannel.class).handler(channelInitializer);
  54         } else {
  55             bootstrap.group(workerGroup).channel(NioSocketChannel.class).handler(channelInitializer);
  56         }
  57         hasRun.set(true);
  58     }
  59
  60     @Override
  61     public ListenableFuture<Boolean> shutdown() {
  62         final SettableFuture<Boolean> result = SettableFuture.create();
  63         workerGroup.shutdownGracefully();
  64         return result;
  65     }
  66
  67     @Override
  68     public ListenableFuture<Boolean> getIsOnlineFuture() {
  69         return hasRun;
  70     }
  71
  72     @Override
  73     public void setThreadConfig(ThreadConfiguration threadConfig) {
  74         // IGNORE
  75     }
  76
  77     @Override
  78     public void initiateConnection(String host, int port) {
  79         try {
  80             bootstrap.connect(host, port).sync();
  81         } catch (InterruptedException e) {
  82             LOG.error("Unable to initiate connection", e);
  83         }
  84     }
  85
  86     public void setChannelInitializer(TcpChannelInitializer channelInitializer) {
  87         this.channelInitializer = channelInitializer;
  88     }
  89 }