5507147073
Now the paradox documentation is no longer functional until we update akka-docs to generate from paradox instead of sphinx
80 lines
2.2 KiB
Java
80 lines
2.2 KiB
Java
/**
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* Copyright (C) 2009-2017 Lightbend Inc. <http://www.lightbend.com>
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*/
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package jdocs.tutorial_4;
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import akka.actor.AbstractActor;
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import akka.actor.ActorRef;
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import akka.actor.Props;
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import akka.actor.Terminated;
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import akka.event.Logging;
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import akka.event.LoggingAdapter;
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import java.util.HashMap;
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import java.util.Map;
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public class DeviceManager extends AbstractActor {
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private final LoggingAdapter log = Logging.getLogger(getContext().getSystem(), this);
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public static Props props() {
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return Props.create(DeviceManager.class);
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}
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public static final class RequestTrackDevice {
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public final String groupId;
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public final String deviceId;
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public RequestTrackDevice(String groupId, String deviceId) {
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this.groupId = groupId;
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this.deviceId = deviceId;
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}
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}
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public static final class DeviceRegistered {
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}
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final Map<String, ActorRef> groupIdToActor = new HashMap<>();
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final Map<ActorRef, String> actorToGroupId = new HashMap<>();
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@Override
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public void preStart() {
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log.info("DeviceManager started");
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}
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@Override
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public void postStop() {
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log.info("DeviceManager stopped");
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}
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private void onTrackDevice(RequestTrackDevice trackMsg) {
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String groupId = trackMsg.groupId;
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ActorRef ref = groupIdToActor.get(groupId);
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if (ref != null) {
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ref.forward(trackMsg, getContext());
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} else {
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log.info("Creating device group actor for {}", groupId);
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ActorRef groupActor = getContext().actorOf(DeviceGroup.props(groupId), "group-" + groupId);
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getContext().watch(groupActor);
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groupActor.forward(trackMsg, getContext());
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groupIdToActor.put(groupId, groupActor);
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actorToGroupId.put(groupActor, groupId);
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}
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}
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private void onTerminated(Terminated t) {
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ActorRef groupActor = t.getActor();
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String groupId = actorToGroupId.get(groupActor);
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log.info("Device group actor for {} has been terminated", groupId);
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actorToGroupId.remove(groupActor);
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groupIdToActor.remove(groupId);
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}
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public Receive createReceive() {
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return receiveBuilder()
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.match(RequestTrackDevice.class, this::onTrackDevice)
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.match(Terminated.class, this::onTerminated)
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.build();
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}
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}
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