protocol/netconf-client/src/main/java/org/opendaylight/netconf/client/ClientTransportChannelListener.java

   1 /*
   2  * Copyright (c) 2024 PANTHEON.tech, 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 package org.opendaylight.netconf.client;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.util.concurrent.FutureCallback;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import com.google.common.util.concurrent.SettableFuture;
  15 import io.netty.util.concurrent.Future;
  16 import io.netty.util.concurrent.FutureListener;
  17 import org.eclipse.jdt.annotation.NonNull;
  18 import org.opendaylight.netconf.transport.api.TransportChannel;
  19 import org.opendaylight.netconf.transport.api.TransportChannelListener;
  20 import org.opendaylight.netconf.transport.api.TransportStack;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 final class ClientTransportChannelListener implements TransportChannelListener, FutureListener<NetconfClientSession>,
  25         FutureCallback<TransportStack> {
  26     private static final Logger LOG = LoggerFactory.getLogger(ClientTransportChannelListener.class);
  27
  28     private final @NonNull SettableFuture<NetconfClientSession> sessionFuture = SettableFuture.create();
  29     private final ClientChannelInitializer initializer;
  30
  31     ClientTransportChannelListener(final ClientChannelInitializer initializer) {
  32         this.initializer = requireNonNull(initializer);
  33     }
  34
  35     @NonNull ListenableFuture<NetconfClientSession> sessionFuture() {
  36         return sessionFuture;
  37     }
  38
  39     @Override
  40     public void onTransportChannelEstablished(final TransportChannel channel) {
  41         LOG.debug("Initializing established transport {}", channel);
  42         final var nettyChannel = channel.channel();
  43         final var promise = nettyChannel.eventLoop().<NetconfClientSession>newPromise();
  44         initializer.initialize(nettyChannel, promise);
  45         promise.addListener(this);
  46     }
  47
  48     @Override
  49     public void onTransportChannelFailed(final Throwable cause) {
  50         sessionFuture.setException(cause);
  51     }
  52
  53     @Override
  54     public void operationComplete(final Future<NetconfClientSession> future) throws Exception {
  55         final var cause = future.cause();
  56         if (cause != null) {
  57             sessionFuture.setException(cause);
  58         } else {
  59             sessionFuture.set(future.getNow());
  60         }
  61     }
  62
  63     @Override
  64     public void onSuccess(final TransportStack result) {
  65         // No-op
  66     }
  67
  68     @Override
  69     public void onFailure(final Throwable cause) {
  70         onTransportChannelFailed(cause);
  71     }
  72 }