| /** |
| * 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.oozie.service; |
| |
| import org.apache.oozie.WorkflowActionBean; |
| import org.apache.oozie.store.StoreException; |
| import org.apache.oozie.store.WorkflowStore; |
| import org.apache.oozie.workflow.WorkflowInstance; |
| import org.apache.oozie.workflow.WorkflowLib; |
| import org.apache.oozie.service.Service; |
| import org.apache.oozie.store.Store; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * Base service for persistency of jobs and actions. |
| */ |
| public abstract class WorkflowStoreService implements Service { |
| |
| public final static String TRANSIENT_VAR_PREFIX = "oozie.workflow."; |
| public static final String WORKFLOW_BEAN = TRANSIENT_VAR_PREFIX + "workflow.bean"; |
| final static String ACTION_ID = "action.id"; |
| final static String ACTIONS_TO_KILL = TRANSIENT_VAR_PREFIX + "actions.to.kill"; |
| final static String ACTIONS_TO_FAIL = TRANSIENT_VAR_PREFIX + "actions.to.fail"; |
| final static String ACTIONS_TO_START = TRANSIENT_VAR_PREFIX + "actions.to.start"; |
| |
| /** |
| * Return the public interface of the service. |
| * |
| * @return {@link WorkflowStoreService}. |
| */ |
| public Class<? extends Service> getInterface() { |
| return WorkflowStoreService.class; |
| } |
| |
| /** |
| * Return a workkflow lib, giving access to the parser functionality. |
| * |
| * @return a workflow lib to use the parser. |
| */ |
| public abstract WorkflowLib getWorkflowLibWithNoDB(); |
| |
| /** |
| * Return a workflow store instance with a fresh transaction. <p> The workflow store has to be committed and then |
| * closed to commit changes, if only close it rolls back. |
| * |
| * @return a workflow store. |
| * @throws StoreException thrown if the workflow store could not be created. |
| */ |
| public abstract WorkflowStore create() throws StoreException; |
| |
| /** |
| * Return a workflow store instance with an existing transaction. <p> The workflow store has to be committed and |
| * then closed to commit changes, if only close it rolls back. |
| * |
| * @param <S> child type of Store |
| * @param store store instance |
| * @return a workflow store. |
| * @throws StoreException thrown if the workflow store could not be created. |
| */ |
| //to do this method can be abstract or should be overridden |
| public <S extends Store> WorkflowStore create(S store) throws StoreException { |
| return null; |
| } |
| |
| /** |
| * Return the list of actions started by a signal in an instance. |
| * |
| * @param instance workflow instance that has been signaled. |
| * @return the list of actions started by the signaling. |
| */ |
| @SuppressWarnings("unchecked") |
| public static List<WorkflowActionBean> getActionsToStart(WorkflowInstance instance) { |
| List<WorkflowActionBean> list = (List<WorkflowActionBean>) instance.getTransientVar(ACTIONS_TO_START); |
| instance.setTransientVar(ACTIONS_TO_START, null); |
| return (list != null) ? list : Collections.EMPTY_LIST; |
| } |
| |
| /** |
| * Return the list of action IDs to kill. |
| * |
| * @param instance workflow instance |
| * @return the list of action IDs to kill. |
| */ |
| @SuppressWarnings("unchecked") |
| public static List<String> getActionsToKill(WorkflowInstance instance) { |
| List<String> list = (List<String>) instance.getTransientVar(ACTIONS_TO_KILL); |
| instance.setTransientVar(ACTIONS_TO_KILL, null); |
| return (list != null) ? list : Collections.EMPTY_LIST; |
| } |
| |
| /** |
| * Return the list of action IDs to fail. |
| * |
| * @param instance workflow instance |
| * @return the list of action IDs to fail. |
| */ |
| @SuppressWarnings("unchecked") |
| public static List<String> getActionsToFail(WorkflowInstance instance) { |
| List<String> list = (List<String>) instance.getTransientVar(ACTIONS_TO_FAIL); |
| instance.setTransientVar(ACTIONS_TO_FAIL, null); |
| return (list != null) ? list : Collections.EMPTY_LIST; |
| } |
| } |