| // 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.cloudstack.network.contrail.management; |
| |
| import java.lang.reflect.Method; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.log4j.Logger; |
| import org.springframework.beans.factory.NoSuchBeanDefinitionException; |
| import org.springframework.stereotype.Component; |
| |
| import org.apache.cloudstack.context.CallContext; |
| import org.apache.cloudstack.framework.events.EventBus; |
| import org.apache.cloudstack.framework.events.EventBusException; |
| import org.aopalliance.intercept.MethodInterceptor; |
| import org.aopalliance.intercept.MethodInvocation; |
| |
| import com.cloud.event.ActionEvent; |
| import com.cloud.event.ActionEvents; |
| import com.cloud.event.Event; |
| import com.cloud.event.EventCategory; |
| import com.cloud.event.EventTypes; |
| import com.cloud.server.ManagementService; |
| import com.cloud.utils.component.ComponentContext; |
| import com.cloud.utils.component.ComponentMethodInterceptor; |
| |
| @Component |
| public class EventUtils { |
| private static final Logger s_logger = Logger.getLogger(EventUtils.class); |
| |
| protected static EventBus s_eventBus = null; |
| |
| public EventUtils() { |
| } |
| |
| private static void publishOnMessageBus(String eventCategory, String eventType, String details, Event.State state) { |
| |
| if (state != com.cloud.event.Event.State.Completed) { |
| return; |
| } |
| |
| try { |
| s_eventBus = ComponentContext.getComponent(EventBus.class); |
| } catch (NoSuchBeanDefinitionException nbe) { |
| return; // no provider is configured to provide events bus, so just return |
| } |
| |
| org.apache.cloudstack.framework.events.Event event = |
| new org.apache.cloudstack.framework.events.Event(ManagementService.Name, eventCategory, eventType, EventTypes.getEntityForEvent(eventType), null); |
| |
| Map<String, String> eventDescription = new HashMap<String, String>(); |
| eventDescription.put("event", eventType); |
| eventDescription.put("status", state.toString()); |
| eventDescription.put("details", details); |
| event.setDescription(eventDescription); |
| try { |
| s_eventBus.publish(event); |
| } catch (EventBusException evx) { |
| String errMsg = "Failed to publish contrail event."; |
| s_logger.warn(errMsg, evx); |
| } |
| |
| } |
| |
| public static class EventInterceptor implements ComponentMethodInterceptor, MethodInterceptor { |
| |
| private static final Logger s_logger = Logger.getLogger(EventInterceptor.class); |
| |
| public EventInterceptor() { |
| |
| } |
| |
| @Override |
| public Object invoke(MethodInvocation invocation) throws Throwable { |
| Method m = invocation.getMethod(); |
| Object target = invocation.getThis(); |
| |
| if ( getActionEvents(m).size() == 0 ) { |
| /* Look for annotation on impl class */ |
| m = target.getClass().getMethod(m.getName(), m.getParameterTypes()); |
| } |
| |
| Object interceptorData = null; |
| |
| boolean success = true; |
| try { |
| interceptorData = interceptStart(m, target); |
| |
| Object result = invocation.proceed(); |
| success = true; |
| |
| return result; |
| } finally { |
| if ( success ) { |
| interceptComplete(m, target, interceptorData); |
| } else { |
| interceptException(m, target, interceptorData); |
| } |
| } |
| } |
| |
| protected List<ActionEvent> getActionEvents(Method m) { |
| List<ActionEvent> result = new ArrayList<ActionEvent>(); |
| |
| ActionEvents events = m.getAnnotation(ActionEvents.class); |
| |
| if ( events != null ) { |
| for ( ActionEvent e : events.value() ) { |
| result.add(e); |
| } |
| } |
| |
| ActionEvent e = m.getAnnotation(ActionEvent.class); |
| |
| if ( e != null ) { |
| result.add(e); |
| } |
| |
| return result; |
| } |
| |
| @Override |
| public Object interceptStart(Method method, Object target) { |
| return null; |
| } |
| |
| @Override |
| public void interceptComplete(Method method, Object target, Object event) { |
| ActionEvent actionEvent = method.getAnnotation(ActionEvent.class); |
| if (actionEvent != null) { |
| CallContext ctx = CallContext.current(); |
| if (!actionEvent.create()) { |
| publishOnMessageBus(EventCategory.ACTION_EVENT.getName(), actionEvent.eventType(), ctx.getEventDetails(), com.cloud.event.Event.State.Completed); |
| } |
| } |
| } |
| |
| @Override |
| public void interceptException(Method method, Object target, Object event) { |
| s_logger.debug("interceptException"); |
| } |
| |
| @Override |
| public boolean needToIntercept(Method method) { |
| ActionEvent actionEvent = method.getAnnotation(ActionEvent.class); |
| if (actionEvent != null) { |
| return true; |
| } |
| |
| return false; |
| } |
| } |
| } |