Pass DiscoveryNode to initiateChannel (elastic#32958)

This is related to elastic#32517. This commit passes the DiscoveryNode to the
initiateChannel method for different Transport implementation. This
will allow additional attributes (besides just the socket address) to be
used when opening channels.

Author: Tim-Brooks

modules/transport-netty4/src/main/java/org/elasticsearch/transport/netty4/Netty4Transport.java

@@ -40,6 +40,7 @@
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.common.SuppressForbidden;
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -228,7 +229,8 @@ protected final void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
     }
 
     @Override
-    protected NettyTcpChannel initiateChannel(InetSocketAddress address, ActionListener<Void> listener) throws IOException {
+    protected NettyTcpChannel initiateChannel(DiscoveryNode node, ActionListener<Void> listener) throws IOException {
+        InetSocketAddress address = node.getAddress().address();
         ChannelFuture channelFuture = bootstrap.connect(address);
         Channel channel = channelFuture.channel();
         if (channel == null) {

server/src/main/java/org/elasticsearch/transport/TcpTransport.java

@@ -439,7 +439,7 @@ public NodeChannels openConnection(DiscoveryNode node, ConnectionProfile connect
                     try {
                         PlainActionFuture<Void> connectFuture = PlainActionFuture.newFuture();
                         connectionFutures.add(connectFuture);
-                        TcpChannel channel = initiateChannel(node.getAddress().address(), connectFuture);
+                        TcpChannel channel = initiateChannel(node, connectFuture);
                         logger.trace(() -> new ParameterizedMessage("Tcp transport client channel opened: {}", channel));
                         channels.add(channel);
                     } catch (Exception e) {
@@ -825,12 +825,12 @@ protected void serverAcceptedChannel(TcpChannel channel) {
     /**
      * Initiate a single tcp socket channel.
      *
-     * @param address address for the initiated connection
+     * @param node for the initiated connection
      * @param connectListener listener to be called when connection complete
      * @return the pending connection
      * @throws IOException if an I/O exception occurs while opening the channel
      */
-    protected abstract TcpChannel initiateChannel(InetSocketAddress address, ActionListener<Void> connectListener) throws IOException;
+    protected abstract TcpChannel initiateChannel(DiscoveryNode node, ActionListener<Void> connectListener) throws IOException;
 
     /**
      * Called to tear down internal resources

server/src/test/java/org/elasticsearch/transport/TcpTransportTests.java

@@ -185,7 +185,7 @@ protected FakeChannel bind(String name, InetSocketAddress address) throws IOExce
                 }
 
                 @Override
-                protected FakeChannel initiateChannel(InetSocketAddress address, ActionListener<Void> connectListener) throws IOException {
+                protected FakeChannel initiateChannel(DiscoveryNode node, ActionListener<Void> connectListener) throws IOException {
                     return new FakeChannel(messageCaptor);
                 }
 

test/framework/src/main/java/org/elasticsearch/transport/MockTcpTransport.java

@@ -19,6 +19,7 @@
 package org.elasticsearch.transport;
 
 import org.elasticsearch.cli.SuppressForbidden;
+import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.core.internal.io.IOUtils;
 import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionListener;
@@ -169,7 +170,8 @@ private void readMessage(MockChannel mockChannel, StreamInput input) throws IOEx
 
     @Override
     @SuppressForbidden(reason = "real socket for mocking remote connections")
-    protected MockChannel initiateChannel(InetSocketAddress address, ActionListener<Void> connectListener) throws IOException {
+    protected MockChannel initiateChannel(DiscoveryNode node, ActionListener<Void> connectListener) throws IOException {
+        InetSocketAddress address = node.getAddress().address();
         final MockSocket socket = new MockSocket();
         final MockChannel channel = new MockChannel(socket, address, "none");
 

test/framework/src/main/java/org/elasticsearch/transport/nio/NioTransport.java

@@ -22,6 +22,7 @@
 import org.apache.logging.log4j.Logger;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.network.NetworkService;
 import org.elasticsearch.common.recycler.Recycler;
@@ -85,8 +86,8 @@ protected TcpNioServerSocketChannel bind(String name, InetSocketAddress address)
     }
 
     @Override
-    protected TcpNioSocketChannel initiateChannel(InetSocketAddress address, ActionListener<Void> connectListener)
-        throws IOException {
+    protected TcpNioSocketChannel initiateChannel(DiscoveryNode node, ActionListener<Void> connectListener) throws IOException {
+        InetSocketAddress address = node.getAddress().address();
         TcpNioSocketChannel channel = nioGroup.openChannel(address, clientChannelFactory);
         channel.addConnectListener(connectListener);
         return channel;