/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.isis.core.runtime.services.eventbus.adapter;
import com.google.common.eventbus.SubscriberExceptionContext;
import com.google.common.eventbus.SubscriberExceptionHandler;
import org.apache.isis.core.runtime.services.eventbus.EventBusImplementationAbstract;
/**
* A wrapper for a Guava {@link com.google.common.eventbus.EventBus},
* allowing arbitrary events to be posted and subscribed to.
*/
public class EventBusImplementationForGuava extends EventBusImplementationAbstract {
private final com.google.common.eventbus.EventBus eventBus = new com.google.common.eventbus.EventBus(newEventBusSubscriberExceptionHandler());
protected SubscriberExceptionHandler newEventBusSubscriberExceptionHandler() {
return new SubscriberExceptionHandler() {
@Override
public void handleException(final Throwable exception,
final SubscriberExceptionContext context) {
final Object event = context.getEvent();
processException(exception, event);
}
};
}
@Override
public void register(final Object domainService) {
eventBus.register(domainService);
}
@Override
public void unregister(final Object domainService) {
// Intentionally no-op.
// this.eventBus.unregister(domainService);
}
@Override
public void post(final Object event) {
eventBus.post(event);
}
}