opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClient.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. 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.controller.netconf.client;
  10
  11 import io.netty.util.concurrent.Future;
  12 import io.netty.util.concurrent.GlobalEventExecutor;
  13
  14 import java.io.Closeable;
  15 import java.io.IOException;
  16 import java.net.InetSocketAddress;
  17 import java.util.Set;
  18 import java.util.concurrent.CancellationException;
  19 import java.util.concurrent.ExecutionException;
  20
  21 import org.opendaylight.controller.netconf.api.NetconfMessage;
  22 import org.opendaylight.protocol.framework.NeverReconnectStrategy;
  23 import org.opendaylight.protocol.framework.ReconnectStrategy;
  24 import org.opendaylight.protocol.framework.TimedReconnectStrategy;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 import com.google.common.base.Preconditions;
  29 import com.google.common.collect.Sets;
  30
  31 public class NetconfClient implements Closeable {
  32
  33     private static final Logger logger = LoggerFactory.getLogger(NetconfClient.class);
  34
  35     public static final int DEFAULT_CONNECT_TIMEOUT = 5000;
  36     private final NetconfClientDispatcher dispatch;
  37     private final String label;
  38     private final NetconfClientSession clientSession;
  39     private final NetconfClientSessionListener sessionListener;
  40     private final long sessionId;
  41     private final InetSocketAddress address;
  42
  43     // TODO test reconnecting constructor
  44     public NetconfClient(String clientLabelForLogging, InetSocketAddress address, int connectionAttempts,
  45             int attemptMsTimeout, NetconfClientDispatcher netconfClientDispatcher) throws InterruptedException {
  46         this(clientLabelForLogging, address, getReconnectStrategy(connectionAttempts, attemptMsTimeout),
  47                 netconfClientDispatcher);
  48     }
  49
  50     private NetconfClient(String clientLabelForLogging, InetSocketAddress address, ReconnectStrategy strat, NetconfClientDispatcher netconfClientDispatcher) throws InterruptedException {
  51         this.label = clientLabelForLogging;
  52         dispatch = netconfClientDispatcher;
  53         sessionListener = new NetconfClientSessionListener();
  54         Future<NetconfClientSession> clientFuture = dispatch.createClient(address, sessionListener, strat);
  55         this.address = address;
  56         clientSession = get(clientFuture);
  57         this.sessionId = clientSession.getSessionId();
  58     }
  59
  60     private NetconfClientSession get(Future<NetconfClientSession> clientFuture) throws InterruptedException {
  61         try {
  62             return clientFuture.get();
  63         } catch (CancellationException e) {
  64             throw new RuntimeException("Netconf client interrupted", e);
  65         } catch (ExecutionException e) {
  66             throw new IllegalStateException("Unable to create netconf client", e);
  67         }
  68     }
  69
  70     public NetconfClient(String clientLabelForLogging, InetSocketAddress address, int connectTimeoutMs,
  71             NetconfClientDispatcher netconfClientDispatcher) throws InterruptedException {
  72         this(clientLabelForLogging, address,
  73                 new NeverReconnectStrategy(GlobalEventExecutor.INSTANCE, connectTimeoutMs), netconfClientDispatcher);
  74     }
  75
  76     public NetconfClient(String clientLabelForLogging, InetSocketAddress address,
  77             NetconfClientDispatcher netconfClientDispatcher) throws InterruptedException {
  78         this(clientLabelForLogging, address, new NeverReconnectStrategy(GlobalEventExecutor.INSTANCE,
  79                 DEFAULT_CONNECT_TIMEOUT), netconfClientDispatcher);
  80     }
  81
  82     public NetconfMessage sendMessage(NetconfMessage message) {
  83         return sendMessage(message, 5, 1000);
  84     }
  85
  86     public NetconfMessage sendMessage(NetconfMessage message, int attempts, int attemptMsDelay) {
  87         Preconditions.checkState(clientSession.isUp(), "Session was not up yet");
  88         clientSession.sendMessage(message);
  89         try {
  90             return sessionListener.getLastMessage(attempts, attemptMsDelay);
  91         } catch (InterruptedException e) {
  92             throw new RuntimeException(this + " Cannot read message from " + address, e);
  93         } catch (IllegalStateException e) {
  94             throw new IllegalStateException(this + " Cannot read message from " + address, e);
  95         }
  96     }
  97
  98     @Override
  99     public void close() throws IOException {
 100         clientSession.close();
 101     }
 102
 103     private static ReconnectStrategy getReconnectStrategy(int connectionAttempts, int attemptMsTimeout) {
 104         return new TimedReconnectStrategy(GlobalEventExecutor.INSTANCE, attemptMsTimeout, 1000, 1.0, null,
 105                 Long.valueOf(connectionAttempts), null);
 106     }
 107
 108     @Override
 109     public String toString() {
 110         final StringBuffer sb = new StringBuffer("NetconfClient{");
 111         sb.append("label=").append(label);
 112         sb.append(", sessionId=").append(sessionId);
 113         sb.append('}');
 114         return sb.toString();
 115     }
 116
 117     public long getSessionId() {
 118         return sessionId;
 119     }
 120
 121     public Set<String> getCapabilities() {
 122         Preconditions.checkState(clientSession != null, "Client was not initialized successfully");
 123         return Sets.newHashSet(clientSession.getServerCapabilities());
 124     }
 125
 126     public NetconfClientSession getClientSession() {
 127         return clientSession;
 128     }
 129 }