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.workflow.lite; 020 021import org.apache.oozie.workflow.WorkflowException; 022import org.apache.oozie.ErrorCode; 023 024import java.util.List; 025 026//TODO javadoc 027public abstract class ActionNodeHandler extends NodeHandler { 028 public static final String OK = "OK"; 029 public static final String ERROR = "ERROR"; 030 031 @Override 032 public final boolean enter(Context context) throws WorkflowException { 033 start(context); 034 return false; 035 } 036 037 @Override 038 public final String exit(Context context) throws WorkflowException { 039 end(context); 040 List<String> transitions = context.getNodeDef().getTransitions(); 041 String signalValue = context.getSignalValue(); 042 if (OK.equals(signalValue)) { 043 return transitions.get(0); 044 } 045 else { 046 if (ERROR.equals(signalValue)) { 047 return transitions.get(1); 048 } 049 } 050 throw new WorkflowException(ErrorCode.E0722, context.getNodeDef().getName()); 051 } 052 053 public abstract void start(Context context) throws WorkflowException; 054 055 public abstract void end(Context context) throws WorkflowException; 056 057}