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 import org.apache.oozie.workflow.WorkflowException; 021 import org.apache.oozie.ErrorCode; 022 023 import java.util.List; 024 025 //TODO javadoc 026 public abstract class ActionNodeHandler extends NodeHandler { 027 public static final String OK = "OK"; 028 public static final String ERROR = "ERROR"; 029 030 @Override 031 public final boolean enter(Context context) throws WorkflowException { 032 start(context); 033 return false; 034 } 035 036 @Override 037 public final String exit(Context context) throws WorkflowException { 038 end(context); 039 List<String> transitions = context.getNodeDef().getTransitions(); 040 String signalValue = context.getSignalValue(); 041 if (OK.equals(signalValue)) { 042 return transitions.get(0); 043 } 044 else { 045 if (ERROR.equals(signalValue)) { 046 return transitions.get(1); 047 } 048 } 049 throw new WorkflowException(ErrorCode.E0722, context.getNodeDef().getName()); 050 } 051 052 public abstract void start(Context context) throws WorkflowException; 053 054 public abstract void end(Context context) throws WorkflowException; 055 056 }