001 /** 002 * Copyright (c) 2010 Yahoo! Inc. All rights reserved. 003 * Licensed under the Apache License, Version 2.0 (the "License"); 004 * you may not use this file except in compliance with the License. 005 * You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software 010 * distributed under the License is distributed on an "AS IS" BASIS, 011 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 * See the License for the specific language governing permissions and 013 * limitations under the License. See accompanying LICENSE file. 014 */ 015 package org.apache.oozie.workflow.lite; 016 017 import java.util.ArrayList; 018 import java.util.List; 019 020 //TODO javadoc 021 public class ForkNodeDef extends NodeDef { 022 023 public static final String FORK_COUNT_PREFIX = "workflow.fork."; 024 025 ForkNodeDef() { 026 } 027 028 public ForkNodeDef(String name, List<String> transitions) { 029 super(name, null, ForkNodeHandler.class, transitions); 030 } 031 032 public static class ForkNodeHandler extends NodeHandler { 033 034 public boolean enter(Context context) { 035 return true; 036 } 037 038 // the return list contains (parentExecutionPath/transition#transition)+ 039 public List<String> multiExit(Context context) { 040 List<String> transitions = context.getNodeDef().getTransitions(); 041 context.setVar(FORK_COUNT_PREFIX + context.getExecutionPath(), "" + transitions.size()); 042 043 List<String> fullTransitions = new ArrayList<String>(transitions.size()); 044 045 for (String transition : transitions) { 046 String childExecutionPath = context.createExecutionPath(transition); 047 String fullTransition = context.createFullTransition(childExecutionPath, transition); 048 fullTransitions.add(fullTransition); 049 } 050 return fullTransitions; 051 } 052 053 public String exit(Context context) { 054 throw new UnsupportedOperationException(); 055 } 056 057 public void kill(Context context) { 058 } 059 060 public void fail(Context context) { 061 } 062 063 } 064 065 }