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 java.util.ArrayList; 022import java.util.List; 023 024/** 025 * Node definition for FORK control node. 026 */ 027public class ForkNodeDef extends ControlNodeDef { 028 029 ForkNodeDef() { 030 } 031 032 public ForkNodeDef(String name, Class<? extends ControlNodeHandler> klass, 033 List<String> transitions) { 034 super(name, "", klass, transitions); 035 } 036 037 public static class ForkNodeHandler extends NodeHandler { 038 039 public boolean enter(Context context) { 040 return true; 041 } 042 043 // the return list contains (parentExecutionPath/transition#transition)+ 044 public List<String> multiExit(Context context) { 045 List<String> transitions = context.getNodeDef().getTransitions(); 046 context.setVar(ControlNodeHandler.FORK_COUNT_PREFIX + context.getExecutionPath(), "" + transitions.size()); 047 048 List<String> fullTransitions = new ArrayList<String>(transitions.size()); 049 050 for (String transition : transitions) { 051 String childExecutionPath = context.createExecutionPath(transition); 052 String fullTransition = context.createFullTransition(childExecutionPath, transition); 053 fullTransitions.add(fullTransition); 054 } 055 return fullTransitions; 056 } 057 058 public String exit(Context context) { 059 throw new UnsupportedOperationException(); 060 } 061 062 public void kill(Context context) { 063 } 064 065 public void fail(Context context) { 066 } 067 068 } 069 070}