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org.jbpm.bpmn2.xml.IntermediateThrowEventHandler Maven / Gradle / Ivy
/**
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* 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.
*/
package org.jbpm.bpmn2.xml;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.drools.core.xml.ExtensibleXmlParser;
import org.jbpm.bpmn2.core.Escalation;
import org.jbpm.bpmn2.core.IntermediateLink;
import org.jbpm.bpmn2.core.Message;
import org.jbpm.bpmn2.core.Signal;
import org.jbpm.compiler.xml.ProcessBuildData;
import org.jbpm.process.core.impl.DataTransformerRegistry;
import org.jbpm.ruleflow.core.RuleFlowProcess;
import org.jbpm.workflow.core.Node;
import org.jbpm.workflow.core.NodeContainer;
import org.jbpm.workflow.core.impl.DroolsConsequenceAction;
import org.jbpm.workflow.core.node.ActionNode;
import org.jbpm.workflow.core.node.CompositeNode;
import org.jbpm.workflow.core.node.ThrowLinkNode;
import org.jbpm.workflow.core.node.Transformation;
import org.kie.api.runtime.process.DataTransformer;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class IntermediateThrowEventHandler extends AbstractNodeHandler {
private DataTransformerRegistry transformerRegistry = DataTransformerRegistry.get();
public static final String LINK_NAME = "linkName";
public static final String LINK_SOURCE = "source";
public static final String LINK_TARGET = "target";
protected Node createNode(Attributes attrs) {
return new ActionNode();
}
@SuppressWarnings("unchecked")
public Class generateNodeFor() {
return Node.class;
}
public Object end(final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
final Element element = parser.endElementBuilder();
ActionNode node = (ActionNode) parser.getCurrent();
// determine type of event definition, so the correct type of node
// can be generated
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("signalEventDefinition".equals(nodeName)) {
// reuse already created ActionNode
handleSignalNode(node, element, uri, localName, parser);
break;
} else if ("messageEventDefinition".equals(nodeName)) {
// reuse already created ActionNode
handleMessageNode(node, element, uri, localName, parser);
break;
} else if ("escalationEventDefinition".equals(nodeName)) {
// reuse already created ActionNode
handleEscalationNode(node, element, uri, localName, parser);
break;
} else if ("compensateEventDefinition".equals(nodeName)) {
// reuse already created ActionNode
handleThrowCompensationEventNode(node, element, uri, localName, parser);
break;
} else if ("linkEventDefinition".equals(nodeName)) {
ThrowLinkNode linkNode = new ThrowLinkNode();
linkNode.setId(node.getId());
handleLinkNode(element, linkNode, xmlNode, parser);
NodeContainer nodeContainer = (NodeContainer) parser
.getParent();
nodeContainer.addNode(linkNode);
((ProcessBuildData) parser.getData()).addNode(node);
// we break the while and stop the execution of this method.
return linkNode;
}
xmlNode = xmlNode.getNextSibling();
}
// none event definition
if (node.getAction() == null) {
node.setAction(new DroolsConsequenceAction("mvel", ""));
node.setMetaData("NodeType", "IntermediateThrowEvent-None");
}
NodeContainer nodeContainer = (NodeContainer) parser.getParent();
nodeContainer.addNode(node);
return node;
}
protected void handleLinkNode(Element element, Node node,
org.w3c.dom.Node xmlLinkNode, ExtensibleXmlParser parser) {
node.setName(element.getAttribute("name"));
NamedNodeMap linkAttr = xmlLinkNode.getAttributes();
String name = linkAttr.getNamedItem("name").getNodeValue();
String id = element.getAttribute("id");
node.setMetaData("UniqueId", id);
node.setMetaData(LINK_NAME, name);
org.w3c.dom.Node xmlNode = xmlLinkNode.getFirstChild();
NodeContainer nodeContainer = (NodeContainer) parser.getParent();
IntermediateLink aLink = new IntermediateLink();
aLink.setName(name);
aLink.setUniqueId(id);
while (null != xmlNode) {
String nodeName = xmlNode.getNodeName();
if (LINK_TARGET.equals(nodeName)) {
String target = xmlNode.getTextContent();
node.setMetaData(LINK_TARGET, target);
}
if (LINK_SOURCE.equals(nodeName)) {
String source = xmlNode.getTextContent();
ArrayList sources = (ArrayList) node
.getMetaData().get(LINK_SOURCE);
// if there is no list, create one
if (null == sources) {
sources = new ArrayList();
}
// to connect nodes.
aLink.addSource(source);
// to do the xml dump
sources.add(source);
node.setMetaData(LINK_SOURCE, sources);
}
xmlNode = xmlNode.getNextSibling();
}
aLink.configureThrow();
if (nodeContainer instanceof RuleFlowProcess) {
RuleFlowProcess process = (RuleFlowProcess) nodeContainer;
List links = (List) process
.getMetaData().get(ProcessHandler.LINKS);
if (null == links) {
links = new ArrayList();
}
links.add(aLink);
process.setMetaData(ProcessHandler.LINKS, links);
} else if (nodeContainer instanceof CompositeNode) {
CompositeNode subprocess = (CompositeNode) nodeContainer;
List links = (List) subprocess
.getMetaData().get(ProcessHandler.LINKS);
if (null == links) {
links = new ArrayList();
}
links.add(aLink);
subprocess.setMetaData(ProcessHandler.LINKS, links);
}
}
public void handleSignalNode(final Node node, final Element element,
final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
ActionNode actionNode = (ActionNode) node;
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("dataInput".equals(nodeName)) {
String id = ((Element) xmlNode).getAttribute("id");
String inputName = ((Element) xmlNode).getAttribute("name");
dataInputs.put(id, inputName);
} else if ("dataInputAssociation".equals(nodeName)) {
readDataInputAssociation(xmlNode, actionNode);
} else if ("signalEventDefinition".equals(nodeName)) {
String signalName = ((Element) xmlNode).getAttribute("signalRef");
String variable = (String) actionNode.getMetaData("MappingVariable");
Map signals = (Map) ((ProcessBuildData) parser.getData()).getMetaData("Signals");
if (signals != null && signals.containsKey(signalName)) {
Signal signal = signals.get(signalName);
signalName = signal.getName();
if (signalName == null) {
throw new IllegalArgumentException("Signal definition must have a name attribute");
}
}
actionNode.setMetaData("EventType", "signal");
actionNode.setMetaData("Ref", signalName);
actionNode.setMetaData("Variable", variable);
// check if signal should be send async
if (dataInputs.containsValue("async")) {
signalName = "ASYNC-" + signalName;
}
String signalExpression = getSignalExpression(actionNode, signalName, "tVariable");
actionNode
.setAction(new DroolsConsequenceAction(
"java",
" Object tVariable = "+ (variable == null ? "null" : variable)+";"
+ "org.jbpm.workflow.core.node.Transformation transformation = (org.jbpm.workflow.core.node.Transformation)kcontext.getNodeInstance().getNode().getMetaData().get(\"Transformation\");"
+ "if (transformation != null) {"
+ " tVariable = new org.jbpm.process.core.event.EventTransformerImpl(transformation)"
+ " .transformEvent("+(variable == null ? "null" : variable)+");"
+ "}"+
signalExpression));
}
xmlNode = xmlNode.getNextSibling();
}
}
@SuppressWarnings("unchecked")
public void handleMessageNode(final Node node, final Element element,
final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
ActionNode actionNode = (ActionNode) node;
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("dataInput".equals(nodeName)) {
String id = ((Element) xmlNode).getAttribute("id");
String inputName = ((Element) xmlNode).getAttribute("name");
dataInputs.put(id, inputName);
} else if ("dataInputAssociation".equals(nodeName)) {
readDataInputAssociation(xmlNode, actionNode);
} else if ("messageEventDefinition".equals(nodeName)) {
String messageRef = ((Element) xmlNode)
.getAttribute("messageRef");
Map messages = (Map) ((ProcessBuildData) parser
.getData()).getMetaData("Messages");
if (messages == null) {
throw new IllegalArgumentException("No messages found");
}
Message message = messages.get(messageRef);
if (message == null) {
throw new IllegalArgumentException(
"Could not find message " + messageRef);
}
String variable = (String) actionNode
.getMetaData("MappingVariable");
actionNode.setMetaData("MessageType", message.getType());
actionNode
.setAction(new DroolsConsequenceAction(
"java",
" Object tVariable = "+ (variable == null ? "null" : variable)+";"
+ "org.jbpm.workflow.core.node.Transformation transformation = (org.jbpm.workflow.core.node.Transformation)kcontext.getNodeInstance().getNode().getMetaData().get(\"Transformation\");"
+ "if (transformation != null) {"
+ " tVariable = new org.jbpm.process.core.event.EventTransformerImpl(transformation)"
+ " .transformEvent("+(variable == null ? "null" : variable)+");"
+ "}"
+ "org.drools.core.process.instance.impl.WorkItemImpl workItem = new org.drools.core.process.instance.impl.WorkItemImpl();"
+ EOL
+ "workItem.setName(\"Send Task\");"
+ EOL
+ "workItem.setProcessInstanceId(kcontext.getProcessInstance().getId());"
+ EOL
+ "workItem.setParameter(\"MessageType\", \""
+ message.getType()
+ "\");"
+ EOL
+ "workItem.setNodeInstanceId(kcontext.getNodeInstance().getId());"
+ EOL
+ "workItem.setNodeId(kcontext.getNodeInstance().getNodeId());"
+ EOL
+ "workItem.setDeploymentId((String) kcontext.getKnowledgeRuntime().getEnvironment().get(\"deploymentId\"));"
+ EOL
+ (variable == null ? ""
: "workItem.setParameter(\"Message\", tVariable);" + EOL)
+ "((org.drools.core.process.instance.WorkItemManager) kcontext.getKnowledgeRuntime().getWorkItemManager()).internalExecuteWorkItem(workItem);"));
}
xmlNode = xmlNode.getNextSibling();
}
}
@SuppressWarnings("unchecked")
public void handleEscalationNode(final Node node, final Element element,
final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
ActionNode actionNode = (ActionNode) node;
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("dataInputAssociation".equals(nodeName)) {
readDataInputAssociation(xmlNode, actionNode);
} else if ("escalationEventDefinition".equals(nodeName)) {
String escalationRef = ((Element) xmlNode)
.getAttribute("escalationRef");
if (escalationRef != null && escalationRef.trim().length() > 0) {
Map escalations = (Map) ((ProcessBuildData) parser
.getData()).getMetaData(ProcessHandler.ESCALATIONS);
if (escalations == null) {
throw new IllegalArgumentException(
"No escalations found");
}
Escalation escalation = escalations.get(escalationRef);
if (escalation == null) {
throw new IllegalArgumentException(
"Could not find escalation " + escalationRef);
}
String faultName = escalation.getEscalationCode();
String variable = (String) actionNode.getMetaData("MappingVariable");
actionNode
.setAction(new DroolsConsequenceAction(
"java",
"org.jbpm.process.instance.context.exception.ExceptionScopeInstance scopeInstance = (org.jbpm.process.instance.context.exception.ExceptionScopeInstance) ((org.jbpm.workflow.instance.NodeInstance) kcontext.getNodeInstance()).resolveContextInstance(org.jbpm.process.core.context.exception.ExceptionScope.EXCEPTION_SCOPE, \""
+ faultName
+ "\");"
+ EOL
+ "if (scopeInstance != null) {"
+ EOL
+ " Object tVariable = "+ (variable == null ? "null" : variable)+";"
+ "org.jbpm.workflow.core.node.Transformation transformation = (org.jbpm.workflow.core.node.Transformation)kcontext.getNodeInstance().getNode().getMetaData().get(\"Transformation\");"
+ "if (transformation != null) {"
+ " tVariable = new org.jbpm.process.core.event.EventTransformerImpl(transformation)"
+ " .transformEvent("+(variable == null ? "null" : variable)+");"
+ "}"
+ " scopeInstance.handleException(\""
+ faultName
+ "\", tVariable);"
+ EOL
+ "} else {"
+ EOL
+ " ((org.jbpm.process.instance.ProcessInstance) kcontext.getProcessInstance()).setState(org.jbpm.process.instance.ProcessInstance.STATE_ABORTED);"
+ EOL + "}"));
} else {
throw new IllegalArgumentException("General escalation is not yet supported");
}
}
xmlNode = xmlNode.getNextSibling();
}
}
protected void readDataInputAssociation(org.w3c.dom.Node xmlNode,
ActionNode actionNode) {
// sourceRef
org.w3c.dom.Node subNode = xmlNode.getFirstChild();
String eventVariable = subNode.getTextContent();
// targetRef
subNode = subNode.getNextSibling();
String target = subNode.getTextContent();
// transformation
Transformation transformation = null;
subNode = subNode.getNextSibling();
if (subNode != null && "transformation".equals(subNode.getNodeName())) {
String lang = subNode.getAttributes().getNamedItem("language").getNodeValue();
String expression = subNode.getTextContent();
DataTransformer transformer = transformerRegistry.find(lang);
if (transformer == null) {
throw new IllegalArgumentException("No transformer registered for language " + lang);
}
transformation = new Transformation(lang, expression, dataInputs.get(target));
actionNode.setMetaData("Transformation", transformation);
}
if (eventVariable != null && eventVariable.trim().length() > 0) {
actionNode.setMetaData("MappingVariable", eventVariable);
}
}
public void writeNode(Node node, StringBuilder xmlDump, int metaDataType) {
throw new IllegalArgumentException(
"Writing out should be handled by action node handler");
}
}
