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give vessels their own forwarding event manager
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51 changes: 51 additions & 0 deletions
51
core/src/main/java/uk/ac/ox/poseidon/core/events/ForwardingEventManager.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * POSEIDON: an agent-based model of fisheries | ||
| * Copyright (c) 2024 CoHESyS Lab [email protected] | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
|
|
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| package uk.ac.ox.poseidon.core.events; | ||
|
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| import lombok.RequiredArgsConstructor; | ||
|
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| @RequiredArgsConstructor | ||
| public class ForwardingEventManager implements EventManager { | ||
|
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| private final EventManager primaryEventManager = new SimpleEventManager(); | ||
| private final EventManager secondaryEventManager; | ||
|
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| @Override | ||
| public <E> void addListener( | ||
| final Class<E> eventClass, | ||
| final Listener<E> listener | ||
| ) { | ||
| primaryEventManager.addListener(eventClass, listener); | ||
| } | ||
|
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||
| @Override | ||
| public <E> void removeListener( | ||
| final Class<E> eventClass, | ||
| final Listener<E> listener | ||
| ) { | ||
| primaryEventManager.removeListener(eventClass, listener); | ||
| } | ||
|
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| @Override | ||
| public <E> void broadcast(final E event) { | ||
| primaryEventManager.broadcast(event); | ||
| secondaryEventManager.broadcast(event); | ||
| } | ||
| } |
96 changes: 96 additions & 0 deletions
96
core/src/main/java/uk/ac/ox/poseidon/core/events/SimpleEventManager.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * POSEIDON: an agent-based model of fisheries | ||
| * Copyright (c) 2024 CoHESyS Lab [email protected] | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
|
|
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| package uk.ac.ox.poseidon.core.events; | ||
|
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| import com.google.common.collect.Multimap; | ||
| import com.google.common.collect.MultimapBuilder; | ||
|
|
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| import java.util.HashSet; | ||
| import java.util.Set; | ||
|
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| public class SimpleEventManager implements EventManager { | ||
|
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| private final Multimap<Class<?>, Listener<?>> listeners = | ||
| MultimapBuilder.hashKeys().arrayListValues().build(); | ||
|
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| @Override | ||
| public <E> void addListener( | ||
| final Class<E> eventClass, | ||
| final Listener<E> listener | ||
| ) { | ||
| listeners.put(eventClass, listener); | ||
| } | ||
|
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||
| @Override | ||
| public <E> void removeListener( | ||
| final Class<E> eventClass, | ||
| final Listener<E> listener | ||
| ) { | ||
| listeners.get(eventClass).removeIf(l -> l == listener); | ||
| } | ||
|
|
||
| @Override | ||
| public <E> void broadcast(final E event) { | ||
| if (event != null) { | ||
| Class<?> eventClass = event.getClass(); | ||
| final Set<Class<?>> visitedClasses = new HashSet<>(); | ||
| // Traverse class hierarchy, including interfaces and their superinterfaces | ||
| while (eventClass != null) { | ||
| if (visitedClasses.add(eventClass)) { // Only process if not visited | ||
| notifyListenersForClass(eventClass, event); | ||
| traverseInterfaces(eventClass, event, visitedClasses); | ||
| } | ||
| eventClass = eventClass.getSuperclass(); | ||
| } | ||
| } | ||
| } | ||
|
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| // Helper method to recursively traverse and notify listeners for interfaces and their | ||
| // superinterfaces | ||
| private <E> void traverseInterfaces( | ||
| final Class<?> clazz, | ||
| final E event, | ||
| final Set<Class<?>> visitedClasses | ||
| ) { | ||
| for (final Class<?> interfaceClass : clazz.getInterfaces()) { | ||
| if (visitedClasses.add(interfaceClass)) { // Only process if not visited | ||
| notifyListenersForClass(interfaceClass, event); | ||
| traverseInterfaces( | ||
| interfaceClass, | ||
| event, | ||
| visitedClasses | ||
| ); | ||
| } | ||
| } | ||
| } | ||
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| @SuppressWarnings("unchecked") | ||
| private <E> void notifyListenersForClass( | ||
| final Class<?> eventClass, | ||
| final E event | ||
| ) { | ||
| listeners | ||
| .get(eventClass) | ||
| .forEach(listener -> | ||
| ((Listener<E>) listener).receive(event) | ||
| ); | ||
| } | ||
|
|
||
| } |
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