ActorContext.getParent for Java API #22413

2017-03-16 09:30:00 +01:00 · 2017-03-16 09:30:00 +01:00 · 2eb226ed32
commit 2eb226ed32
parent 5ff44194a3
213 changed files with 1319 additions and 1523 deletions
--- a/akka-docs/rst/java/code/jdocs/io/JavaUdpMulticast.java
+++ b/akka-docs/rst/java/code/jdocs/io/JavaUdpMulticast.java
@ -0,0 +1,128 @@
+/**
+ * Copyright (C) 2009-2017 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package jdocs.io;
+
+//#imports
+import akka.actor.ActorRef;
+import akka.actor.AbstractActor;
+import akka.event.Logging;
+import akka.event.LoggingAdapter;
+import akka.io.Inet;
+import akka.io.Udp;
+import akka.io.UdpMessage;
+import akka.util.ByteString;
+
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.NetworkInterface;
+import java.net.StandardProtocolFamily;
+import java.net.DatagramSocket;
+import java.nio.channels.DatagramChannel;
+import java.util.ArrayList;
+import java.util.List;
+//#imports
+
+public class JavaUdpMulticast {
+    //#inet6-protocol-family
+    public static class Inet6ProtocolFamily extends Inet.DatagramChannelCreator {
+        @Override
+        public DatagramChannel create() throws Exception {
+            return DatagramChannel.open(StandardProtocolFamily.INET6);
+        }
+    }
+    //#inet6-protocol-family
+
+    //#multicast-group
+    public static class MulticastGroup extends Inet.AbstractSocketOptionV2 {
+        private String address;
+        private String interf;
+
+        public MulticastGroup(String address, String interf) {
+            this.address = address;
+            this.interf = interf;
+        }
+
+        @Override
+        public void afterBind(DatagramSocket s) {
+            try {
+                InetAddress group = InetAddress.getByName(address);
+                NetworkInterface networkInterface = NetworkInterface.getByName(interf);
+                s.getChannel().join(group, networkInterface);
+            } catch (Exception ex) {
+                System.out.println("Unable to join multicast group.");
+            }
+        }
+    }
+    //#multicast-group
+
+    public static class Listener extends AbstractActor {
+        LoggingAdapter log = Logging.getLogger(getContext().getSystem(), this);
+
+        ActorRef sink;
+
+        public Listener(String iface, String group, Integer port, ActorRef sink) {
+            this.sink = sink;
+
+            //#bind
+            List<Inet.SocketOption> options = new ArrayList<>();
+            options.add(new Inet6ProtocolFamily());
+            options.add(new MulticastGroup(group, iface));
+
+            final ActorRef mgr = Udp.get(getContext().getSystem()).getManager();
+            // listen for datagrams on this address
+            InetSocketAddress endpoint = new InetSocketAddress(port);
+            mgr.tell(UdpMessage.bind(self(), endpoint, options), getSelf());
+            //#bind
+        }
+
+        @Override
+        public Receive createReceive() {
+            return receiveBuilder()
+                .match(Udp.Bound.class, bound -> {
+                  log.info("Bound to {}", bound.localAddress());
+                  sink.tell(bound, getSelf());
+                })
+                .match(Udp.Received.class, received -> {
+                  final String txt = received.data().decodeString("utf-8");
+                  log.info("Received '{}' from {}", txt, received.sender());
+                  sink.tell(txt, getSelf());
+                })
+                .build();
+        }
+    }
+
+    public static class Sender extends AbstractActor {
+        LoggingAdapter log = Logging.getLogger(getContext().getSystem(), this);
+
+        String iface;
+        String group;
+        Integer port;
+        String message;
+
+        public Sender(String iface, String group, Integer port, String msg) {
+            this.iface = iface;
+            this.group = group;
+            this.port = port;
+            this.message = msg;
+
+            List<Inet.SocketOption> options = new ArrayList<>();
+            options.add(new Inet6ProtocolFamily());
+
+            final ActorRef mgr = Udp.get(getContext().getSystem()).getManager();
+            mgr.tell(UdpMessage.simpleSender(options), getSelf());
+        }
+
+        @Override
+        public Receive createReceive() {
+            return receiveBuilder()
+                .match(Udp.SimpleSenderReady.class, x -> {
+                    InetSocketAddress remote = new InetSocketAddress(group + "%" + iface, port);
+                    log.info("Sending message to " + remote);
+                    getSender().tell(UdpMessage.send(ByteString.fromString(message), remote), getSelf());
+                })
+                .build();
+        }
+    }
+}