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GH24992 Admin Logger: Temporary HK2 event service
Until the HK2 extras OSGi manifest is fixed
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100 changes: 100 additions & 0 deletions
100
...ommon/common-util/src/main/java/org/glassfish/hk2util/SimpleTopicDistributionService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Copyright (c) 2024 Contributors to the Eclipse Foundation. | ||
| * | ||
| * This program and the accompanying materials are made available under the | ||
| * terms of the Eclipse Public License v. 2.0, which is available at | ||
| * http://www.eclipse.org/legal/epl-2.0. | ||
| * | ||
| * This Source Code may also be made available under the following Secondary | ||
| * Licenses when the conditions for such availability set forth in the | ||
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, | ||
| * version 2 with the GNU Classpath Exception, which is available at | ||
| * https://www.gnu.org/software/classpath/license.html. | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 | ||
| */package org.glassfish.hk2util; | ||
|
|
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| import static java.lang.System.Logger.Level.WARNING; | ||
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|
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| import jakarta.inject.Inject; | ||
| import jakarta.inject.Named; | ||
| import jakarta.inject.Singleton; | ||
| import java.lang.annotation.Annotation; | ||
| import java.lang.reflect.Method; | ||
| import java.lang.reflect.Parameter; | ||
| import java.util.Arrays; | ||
| import org.glassfish.hk2.api.IterableProvider; | ||
| import org.glassfish.hk2.api.ServiceLocator; | ||
| import org.glassfish.hk2.api.TypeLiteral; | ||
| import org.glassfish.hk2.api.messaging.MessageReceiver; | ||
| import org.glassfish.hk2.api.messaging.SubscribeTo; | ||
| import org.glassfish.hk2.api.messaging.Topic; | ||
| import org.glassfish.hk2.api.messaging.TopicDistributionService; | ||
| import org.glassfish.hk2.utilities.ServiceLocatorUtilities; | ||
| import org.jvnet.hk2.annotations.ContractsProvided; | ||
|
|
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| /** | ||
| * | ||
| * @author Ondro Mihalyi | ||
| */ | ||
| @Singleton | ||
| @Named(SimpleTopicDistributionService.NAME) | ||
| @ContractsProvided({TopicDistributionService.class}) | ||
| public class SimpleTopicDistributionService implements TopicDistributionService { | ||
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| public static final String NAME = "SimpleTopicDistributionService"; | ||
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| @Inject | ||
| private IterableProvider<Object> receivers; | ||
|
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| public static void enable(ServiceLocator locator) { | ||
| if (locator == null) { | ||
| throw new IllegalArgumentException(); | ||
| } | ||
|
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| if (locator.getService(SimpleTopicDistributionService.class, SimpleTopicDistributionService.NAME) != null) { | ||
| // Will not add it a second time | ||
| return; | ||
| } | ||
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| ServiceLocatorUtilities.addClasses(locator, true, SimpleTopicDistributionService.class); | ||
| } | ||
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| @Override | ||
| public void distributeMessage(Topic<?> topic, Object message) { | ||
| receivers.ofType(new TypeLiteral<MessageReceiver>() { | ||
| }.getType()) | ||
| .forEach(receiver -> { | ||
| Arrays.stream(receiver.getClass().getMethods()) | ||
| .filter(method -> { | ||
| final Parameter[] parameters = method.getParameters(); | ||
| return methodReturnsVoid(method) | ||
| && parameters.length == 1 | ||
| && method.getParameterTypes()[0].isInstance(message) | ||
| && containsSubscribeToAnnotation(parameters[0].getAnnotations()); | ||
| }) | ||
| .forEach(method -> { | ||
| try { | ||
| method.invoke(receiver, message); | ||
| } catch (Exception ex) { | ||
| System.getLogger(SimpleTopicDistributionService.class.getName()) | ||
| .log(WARNING, ex.getMessage(), ex); | ||
| } | ||
| }); | ||
| }); | ||
| } | ||
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| private static boolean methodReturnsVoid(Method method) { | ||
| return method.getReturnType().equals(Void.TYPE); | ||
| } | ||
|
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| private boolean containsSubscribeToAnnotation(Annotation[] annotations) { | ||
| for (Annotation annotation : annotations) { | ||
| if (SubscribeTo.class.isInstance(annotation)) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| } |
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