| /** |
| * 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.ambari.server.metadata; |
| |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.ambari.server.controller.RootServiceResponseFactory.Components; |
| import org.apache.ambari.server.controller.RootServiceResponseFactory.Services; |
| import org.apache.ambari.server.state.alert.AlertDefinition; |
| import org.apache.ambari.server.state.alert.AlertDefinitionFactory; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| |
| /** |
| * The {@link AmbariServiceAlertDefinitions} class is used to represent the |
| * alerts defined in {@code alerts.json} which are for |
| * {@link Components#AMBARI_AGENT} and {@link Components#AMBARI_SERVER}. These |
| * alerts are bound to the host and are not part of a cluster or hadoop service. |
| */ |
| @Singleton |
| public class AmbariServiceAlertDefinitions { |
| |
| /** |
| * Logger. |
| */ |
| private final static Logger LOG = LoggerFactory.getLogger(AmbariServiceAlertDefinitions.class); |
| |
| /** |
| * The agent host definitions. |
| */ |
| private List<AlertDefinition> m_agentDefinitions = null; |
| |
| /** |
| * The server definitions. |
| */ |
| private List<AlertDefinition> m_serverDefinitions = null; |
| |
| /** |
| * The factory that will load the definitions from the alerts.json file. |
| */ |
| @Inject |
| private AlertDefinitionFactory m_factory; |
| |
| /** |
| * Gets all of the {@link AlertDefinition}s that exist on the path for all |
| * agent hosts. |
| * |
| * @return the alerts with {@link Components#AMBARI_AGENT} as the component |
| * and {@code AMBARI} as the service. |
| */ |
| public List<AlertDefinition> getAgentDefinitions() { |
| if (null != m_agentDefinitions) { |
| return m_agentDefinitions; |
| } |
| |
| m_agentDefinitions = getDefinitions(Components.AMBARI_AGENT); |
| return m_agentDefinitions; |
| } |
| |
| /** |
| * Gets all of the {@link AlertDefinition}s that exist on the path for |
| * {@link Components#AMBARI_SERVER}. |
| * |
| * @return the alerts with {@link Components#AMBARI_SERVER} as the component |
| * and {@code AMBARI} as the service. |
| */ |
| public List<AlertDefinition> getServerDefinitions() { |
| if (null != m_serverDefinitions) { |
| return m_serverDefinitions; |
| } |
| |
| m_serverDefinitions = getDefinitions(Components.AMBARI_SERVER); |
| return m_serverDefinitions; |
| } |
| |
| /** |
| * Loads the definitions for the {@code AMBARI} service for the specified |
| * component. |
| * |
| * @param component |
| * the component (not {@code null}). |
| * @return the alert definitions for {@code AMBARI} service for the given |
| * component. |
| */ |
| private List<AlertDefinition> getDefinitions(Components component) { |
| List<AlertDefinition> definitions = new ArrayList<AlertDefinition>(); |
| |
| InputStream inputStream = ClassLoader.getSystemResourceAsStream("alerts.json"); |
| InputStreamReader reader = new InputStreamReader(inputStream); |
| |
| try { |
| Set<AlertDefinition> allDefinitions = m_factory.getAlertDefinitions( |
| reader, Services.AMBARI.name()); |
| |
| String componentName = component.name(); |
| |
| for (AlertDefinition definition : allDefinitions) { |
| if (componentName.equals(definition.getComponentName())) { |
| definitions.add(definition); |
| } |
| } |
| |
| } catch (Exception exception) { |
| LOG.error("Unable to load the Ambari alerts JSON file", exception); |
| } |
| |
| return definitions; |
| } |
| } |