2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.protocol.pcep.impl;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.Preconditions;
13 import io.netty.bootstrap.Bootstrap;
14 import io.netty.channel.ChannelFuture;
15 import io.netty.channel.ChannelFutureListener;
16 import io.netty.channel.ChannelOption;
17 import io.netty.channel.EventLoop;
18 import io.netty.util.concurrent.DefaultPromise;
19 import io.netty.util.concurrent.EventExecutor;
20 import io.netty.util.concurrent.Future;
21 import io.netty.util.concurrent.Promise;
22 import java.net.InetSocketAddress;
23 import java.util.concurrent.TimeUnit;
24 import org.checkerframework.checker.lock.qual.GuardedBy;
25 import org.opendaylight.protocol.pcep.PCEPSession;
26 import org.slf4j.Logger;
27 import org.slf4j.LoggerFactory;
29 // This class is thread-safe
30 public final class PCEPProtocolSessionPromise<S extends PCEPSession> extends DefaultPromise<S> {
31 private static final Logger LOG = LoggerFactory.getLogger(PCEPProtocolSessionPromise.class);
32 private InetSocketAddress address;
33 private final int retryTimer;
34 private final int connectTimeout;
35 private final Bootstrap bootstrap;
37 private Future<?> pending;
39 PCEPProtocolSessionPromise(final EventExecutor executor, final InetSocketAddress address,
40 final int retryTimer, final int connectTimeout, final Bootstrap bootstrap) {
42 this.address = requireNonNull(address);
43 this.retryTimer = retryTimer;
44 this.connectTimeout = connectTimeout;
45 this.bootstrap = requireNonNull(bootstrap);
48 synchronized void connect() {
49 final PCEPProtocolSessionPromise<?> lock = this;
52 LOG.debug("Promise {} attempting connect for {}ms", lock, this.connectTimeout);
53 if (this.address.isUnresolved()) {
54 this.address = new InetSocketAddress(this.address.getHostName(), this.address.getPort());
57 this.bootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, this.connectTimeout);
58 this.bootstrap.remoteAddress(this.address);
59 final ChannelFuture connectFuture = this.bootstrap.connect();
60 connectFuture.addListener(new BootstrapConnectListener());
61 this.pending = connectFuture;
62 } catch (Exception e) {
63 LOG.info("Failed to connect to {}", this.address, e);
69 public synchronized boolean cancel(final boolean mayInterruptIfRunning) {
70 if (super.cancel(mayInterruptIfRunning)) {
71 this.pending.cancel(mayInterruptIfRunning);
79 public synchronized Promise<S> setSuccess(final S result) {
80 LOG.debug("Promise {} completed", this);
81 return super.setSuccess(result);
84 private class BootstrapConnectListener implements ChannelFutureListener {
86 public void operationComplete(final ChannelFuture cf) {
87 synchronized (PCEPProtocolSessionPromise.this) {
88 PCEPProtocolSessionPromise.LOG.debug("Promise {} connection resolved",
89 PCEPProtocolSessionPromise.this);
90 Preconditions.checkState(PCEPProtocolSessionPromise.this.pending.equals(cf));
91 if (PCEPProtocolSessionPromise.this.isCancelled()) {
93 PCEPProtocolSessionPromise.LOG.debug("Closing channel for cancelled promise {}",
94 PCEPProtocolSessionPromise.this);
97 } else if (cf.isSuccess()) {
98 PCEPProtocolSessionPromise.LOG.debug("Promise {} connection successful",
99 PCEPProtocolSessionPromise.this);
101 PCEPProtocolSessionPromise.LOG.debug("Attempt to connect to {} failed",
102 PCEPProtocolSessionPromise.this.address, cf.cause());
104 if (PCEPProtocolSessionPromise.this.retryTimer == 0) {
105 PCEPProtocolSessionPromise.LOG
106 .debug("Retry timer value is 0. Reconnection will not be attempted");
107 PCEPProtocolSessionPromise.this.setFailure(cf.cause());
111 final EventLoop loop = cf.channel().eventLoop();
112 loop.schedule(() -> {
113 synchronized (PCEPProtocolSessionPromise.this) {
114 PCEPProtocolSessionPromise.LOG.debug("Attempting to connect to {}",
115 PCEPProtocolSessionPromise.this.address);
116 final Future<Void> reconnectFuture = PCEPProtocolSessionPromise.this.bootstrap.connect();
117 reconnectFuture.addListener(BootstrapConnectListener.this);
118 PCEPProtocolSessionPromise.this.pending = reconnectFuture;
120 }, PCEPProtocolSessionPromise.this.retryTimer, TimeUnit.SECONDS);
121 PCEPProtocolSessionPromise.LOG.debug("Next reconnection attempt in {}s",
122 PCEPProtocolSessionPromise.this.retryTimer);