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 */
018package org.apache.oozie.workflow.lite;
019
020
021import org.apache.oozie.workflow.WorkflowApp;
022import org.apache.oozie.workflow.WorkflowException;
023import org.apache.oozie.workflow.WorkflowInstance;
024import org.apache.oozie.workflow.WorkflowLib;
025import org.apache.oozie.service.Services;
026import org.apache.oozie.service.UUIDService;
027import org.apache.oozie.service.UUIDService.ApplicationType;
028import org.apache.oozie.util.ParamChecker;
029import org.apache.hadoop.conf.Configuration;
030
031import javax.xml.validation.Schema;
032import java.io.StringReader;
033
034//TODO javadoc
035public abstract class LiteWorkflowLib implements WorkflowLib {
036    private Schema schema;
037    private Class<? extends ControlNodeHandler> controlHandlerClass;
038    private Class<? extends DecisionNodeHandler> decisionHandlerClass;
039    private Class<? extends ActionNodeHandler> actionHandlerClass;
040
041    public LiteWorkflowLib(Schema schema,
042                           Class<? extends ControlNodeHandler> controlNodeHandler,
043                           Class<? extends DecisionNodeHandler> decisionHandlerClass,
044                           Class<? extends ActionNodeHandler> actionHandlerClass) {
045        this.schema = schema;
046        this.controlHandlerClass = controlNodeHandler;
047        this.decisionHandlerClass = decisionHandlerClass;
048        this.actionHandlerClass = actionHandlerClass;
049    }
050
051    @Override
052    public WorkflowApp parseDef(String appXml, Configuration jobConf) throws WorkflowException {
053        ParamChecker.notEmpty(appXml, "appXml");
054        return new LiteWorkflowAppParser(schema, controlHandlerClass, decisionHandlerClass, actionHandlerClass)
055                .validateAndParse(new StringReader(appXml), jobConf);
056    }
057
058    @Override
059    public WorkflowInstance createInstance(WorkflowApp app, Configuration conf) throws WorkflowException {
060        ParamChecker.notNull(app, "app");
061        String jobId = Services.get().get(UUIDService.class).generateId(ApplicationType.WORKFLOW);
062        return new LiteWorkflowInstance((LiteWorkflowApp) app, conf, jobId);
063    }
064
065    @Override
066    public WorkflowInstance createInstance(WorkflowApp app, Configuration conf, String wfId) throws WorkflowException {
067        ParamChecker.notNull(app, "app");
068        ParamChecker.notNull(wfId, "wfId");
069        return new LiteWorkflowInstance((LiteWorkflowApp) app, conf, wfId);
070    }
071}