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