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Add extensions to connectivity service
Signed-off-by: David Schwilk <david.schwilk@bosch.io>
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76 changes: 76 additions & 0 deletions
76
.../src/main/java/org/eclipse/ditto/connectivity/service/CustomConnectivityRootExecutor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| /* | ||
| * Copyright (c) 2022 Contributors to the Eclipse Foundation | ||
| * | ||
| * See the NOTICE file(s) distributed with this work for additional | ||
| * information regarding copyright ownership. | ||
| * | ||
| * This program and the accompanying materials are made available under the | ||
| * terms of the Eclipse Public License 2.0 which is available at | ||
| * http://www.eclipse.org/legal/epl-2.0 | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| */ | ||
| package org.eclipse.ditto.connectivity.service; | ||
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| import java.util.List; | ||
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| import org.eclipse.ditto.base.service.DittoExtensionPoint; | ||
| import org.eclipse.ditto.connectivity.service.config.DittoConnectivityConfig; | ||
| import org.eclipse.ditto.internal.utils.akka.AkkaClassLoader; | ||
| import org.eclipse.ditto.internal.utils.config.DefaultScopedConfig; | ||
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| import akka.actor.AbstractExtensionId; | ||
| import akka.actor.ActorContext; | ||
| import akka.actor.ActorSystem; | ||
| import akka.actor.ExtendedActorSystem; | ||
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| /** | ||
| * Executor for custom code in connectivity root. Can be used i.e. to start custom actors. | ||
| * | ||
| * @since 3.0.0 | ||
| */ | ||
| public abstract class CustomConnectivityRootExecutor implements DittoExtensionPoint { | ||
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| private static final ExtensionId EXTENSION_ID = new ExtensionId(); | ||
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| protected final ActorSystem actorSystem; | ||
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| /** | ||
| * @param actorSystem the actor system in which to load the extension. | ||
| */ | ||
| protected CustomConnectivityRootExecutor(final ActorSystem actorSystem) { | ||
| this.actorSystem = actorSystem; | ||
| } | ||
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| /** | ||
| * Execute custom custom code. | ||
| * @param actorContext the context of the {@code ConnectivityRootActor}. | ||
| */ | ||
| public abstract void execute(ActorContext actorContext); | ||
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| /** | ||
| * Loads the implementation of {@code CustomConnectivityRootExecutor} which is configured for the | ||
| * {@code ActorSystem}. | ||
| * | ||
| * @param actorSystem the actorSystem in which the {@code CustomConnectivityRootExecutor} should be loaded. | ||
| * @return the {@code CustomConnectivityRootExecutor} implementation. | ||
| * @throws NullPointerException if {@code actorSystem} is {@code null}. | ||
| */ | ||
| public static CustomConnectivityRootExecutor get(final ActorSystem actorSystem) { | ||
| return EXTENSION_ID.get(actorSystem); | ||
| } | ||
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| private static final class ExtensionId extends AbstractExtensionId<CustomConnectivityRootExecutor> { | ||
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| @Override | ||
| public CustomConnectivityRootExecutor createExtension(final ExtendedActorSystem system) { | ||
| final var implementation = DittoConnectivityConfig.of(DefaultScopedConfig.dittoScoped( | ||
| system.settings().config())).getCustomRootExecutor(); | ||
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| return AkkaClassLoader.instantiate(system, CustomConnectivityRootExecutor.class, | ||
| implementation, | ||
| List.of(ActorSystem.class), | ||
| List.of(system)); | ||
| } | ||
| } | ||
| } |
34 changes: 34 additions & 0 deletions
34
...ce/src/main/java/org/eclipse/ditto/connectivity/service/NoOpConnectivityRootExecutor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| /* | ||
| * Copyright (c) 2022 Contributors to the Eclipse Foundation | ||
| * | ||
| * See the NOTICE file(s) distributed with this work for additional | ||
| * information regarding copyright ownership. | ||
| * | ||
| * This program and the accompanying materials are made available under the | ||
| * terms of the Eclipse Public License 2.0 which is available at | ||
| * http://www.eclipse.org/legal/epl-2.0 | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| */ | ||
| package org.eclipse.ditto.connectivity.service; | ||
|
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| import akka.actor.ActorContext; | ||
| import akka.actor.ActorSystem; | ||
|
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| /** | ||
| * Connectivity root executor that does purposefully nothing. | ||
| */ | ||
| public class NoOpConnectivityRootExecutor extends CustomConnectivityRootExecutor{ | ||
|
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| /** | ||
| * @param actorSystem the actor system in which to load the extension. | ||
| */ | ||
| protected NoOpConnectivityRootExecutor(final ActorSystem actorSystem) { | ||
| super(actorSystem); | ||
| } | ||
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| @Override | ||
| public void execute(final ActorContext actorContext) { | ||
| // Do nothing. | ||
| } | ||
| } |
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