package org.drools.workflow.instance.node;
/*
* Copyright 2005 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.drools.process.core.context.exception.ExceptionScope;
import org.drools.process.core.context.variable.VariableScope;
import org.drools.process.instance.ProcessInstance;
import org.drools.process.instance.context.exception.ExceptionScopeInstance;
import org.drools.process.instance.context.variable.VariableScopeInstance;
import org.drools.runtime.process.NodeInstance;
import org.drools.workflow.core.node.FaultNode;
import org.drools.workflow.instance.NodeInstanceContainer;
import org.drools.workflow.instance.impl.NodeInstanceImpl;
/**
* Runtime counterpart of a fault node.
*
* @author <a href="mailto:kris_verlaenen@hotmail.com">Kris Verlaenen</a>
*/
public class FaultNodeInstance extends NodeInstanceImpl {
private static final long serialVersionUID = 400L;
protected FaultNode getFaultNode() {
return (FaultNode) getNode();
}
public void internalTrigger(final NodeInstance from, String type) {
if (!org.drools.workflow.core.Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
throw new IllegalArgumentException(
"A FaultNode only accepts default incoming connections!");
}
String faultName = getFaultName();
ExceptionScopeInstance exceptionScopeInstance = getExceptionScopeInstance(faultName);
((NodeInstanceContainer) getNodeInstanceContainer()).removeNodeInstance(this);
if (exceptionScopeInstance != null) {
handleException(faultName, exceptionScopeInstance);
} else {
((ProcessInstance) getProcessInstance()).setState(ProcessInstance.STATE_ABORTED);
}
}
protected ExceptionScopeInstance getExceptionScopeInstance(String faultName) {
return (ExceptionScopeInstance)
resolveContextInstance(ExceptionScope.EXCEPTION_SCOPE, faultName);
}
protected String getFaultName() {
return getFaultNode().getFaultName();
}
protected Object getFaultData() {
Object value = null;
String faultVariable = getFaultNode().getFaultVariable();
if (faultVariable != null) {
VariableScopeInstance variableScopeInstance = (VariableScopeInstance)
resolveContextInstance(VariableScope.VARIABLE_SCOPE, faultVariable);
if (variableScopeInstance != null) {
value = variableScopeInstance.getVariable(faultVariable);
} else {
System.err.println("Could not find variable scope for variable " + faultVariable);
System.err.println("when trying to execute fault node " + getFaultNode().getName());
System.err.println("Continuing without setting value.");
}
}
return value;
}
protected void handleException(String faultName, ExceptionScopeInstance exceptionScopeInstance) {
exceptionScopeInstance.handleException(faultName, getFaultData());
}
}