001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.oozie.service; 020 021import org.apache.oozie.store.StoreException; 022import org.apache.oozie.store.SLAStore; 023import org.apache.oozie.store.Store; 024import org.apache.oozie.store.WorkflowStore; 025import org.apache.oozie.ErrorCode; 026import javax.persistence.EntityManager; 027 028/** 029 * Base service for persistency of jobs and actions. 030 */ 031public class StoreService implements Service { 032 033 /** 034 * Return instance of store. 035 * 036 * @return {@link Store}. 037 */ 038 @SuppressWarnings("unchecked") 039 public <S extends Store> S getStore(Class<S> klass) throws StoreException { 040 if (WorkflowStore.class.equals(klass)) { 041 return (S) Services.get().get(WorkflowStoreService.class).create(); 042 } 043 else if (SLAStore.class.equals(klass)) { 044 return (S) Services.get().get(SLAStoreService.class).create(); 045 } 046 // to do add checks for other stores - coordinator and SLA stores 047 throw new StoreException(ErrorCode.E0607, " can not get store StoreService.getStore(Class)", ""); 048 } 049 050 /** 051 * Return instance of store with an EntityManager pointing to an existing Store. 052 * 053 * @return {@link Store}. 054 */ 055 @SuppressWarnings("unchecked") 056 public <S extends Store, T extends Store> S getStore(Class<S> klass, T store) throws StoreException { 057 if (WorkflowStore.class.equals(klass)) { 058 return (S) Services.get().get(WorkflowStoreService.class).create(store); 059 } 060 else if (SLAStore.class.equals(klass)) { 061 return (S) Services.get().get(SLAStoreService.class).create(store); 062 } 063 throw new StoreException(ErrorCode.E0607, " StoreService.getStore(Class, store)", ""); 064 } 065 066 /** 067 * Return the public interface of the service. 068 * 069 * @return {@link StoreService}. 070 */ 071 public Class<? extends Service> getInterface() { 072 return StoreService.class; 073 } 074 075 private JPAService jpaService; 076 077 /** 078 * Initializes the {@link StoreService}. 079 * 080 * @param services services instance. 081 */ 082 public void init(Services services) throws ServiceException { 083 jpaService = Services.get().get(JPAService.class); 084 if (jpaService == null) { 085 throw new ServiceException(ErrorCode.E0610); 086 } 087 } 088 089 /** 090 * Destroy the StoreService 091 */ 092 public void destroy() { 093 } 094 095 /** 096 * Return EntityManager 097 */ 098 public EntityManager getEntityManager() { 099 return jpaService.getEntityManager(); 100 } 101}