Java tutorial
/* * 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 io.brooklyn.ambari.cluster; import org.apache.brooklyn.api.entity.EntityLocal; import org.apache.brooklyn.api.sensor.SensorEvent; import org.apache.brooklyn.api.sensor.SensorEventListener; import org.apache.brooklyn.core.entity.lifecycle.ServiceStateLogic; import org.apache.commons.lang3.StringUtils; import io.brooklyn.ambari.AmbariCluster; import io.brooklyn.ambari.service.ExtraServiceException; public final class ClusterStateEventListener implements SensorEventListener<String> { private final AmbariCluster entity; public ClusterStateEventListener(AmbariCluster entity) { this.entity = entity; } @Override public void onEvent(SensorEvent<String> sensorEvent) { Boolean installed = entity.getAttribute(AmbariCluster.CLUSTER_SERVICES_INSTALLED); if (StringUtils.isNotBlank(sensorEvent.getValue()) && sensorEvent.getValue().equals("COMPLETED") && !Boolean.TRUE.equals(installed)) { try { entity.postDeployCluster(); } catch (ExtraServiceException ex) { ServiceStateLogic.ServiceNotUpLogic.updateNotUpIndicator((EntityLocal) entity, "ambari.extra.service", ex.getMessage()); throw ex; } } } }