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/*
* Copyright 2017 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.workflow.instance;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
import org.drools.core.common.InternalKnowledgeRuntime;
import org.jbpm.ruleflow.core.RuleFlowProcess;
import org.jbpm.ruleflow.instance.RuleFlowProcessInstance;
import org.jbpm.workflow.core.impl.NodeImpl;
import org.jbpm.workflow.instance.impl.NodeInstanceImpl;
import org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl;
import org.kie.api.definition.process.Node;
import org.kie.api.definition.process.NodeContainer;
import org.kie.api.definition.process.Process;
import org.kie.api.definition.process.WorkflowProcess;
import org.kie.api.runtime.KieRuntime;
import org.kie.api.runtime.process.NodeInstance;
public class WorkflowProcessInstanceUpgrader {
public static void upgradeProcessInstance( KieRuntime kruntime, long processInstanceId, String processId,
Map nodeMapping) {
if (nodeMapping == null) {
nodeMapping = new HashMap();
}
WorkflowProcessInstanceImpl processInstance = (WorkflowProcessInstanceImpl)
kruntime.getProcessInstance(processInstanceId);
if (processInstance == null) {
throw new IllegalArgumentException("Could not find process instance " + processInstanceId);
}
if (processId == null) {
throw new IllegalArgumentException("Null process id");
}
WorkflowProcess process = (WorkflowProcess)
kruntime.getKieBase().getProcess(processId);
if (process == null) {
throw new IllegalArgumentException("Could not find process " + processId);
}
if (processInstance.getProcessId().equals(processId)) {
return;
}
synchronized (processInstance) {
org.kie.api.definition.process.Process oldProcess = processInstance.getProcess();
processInstance.disconnect();
processInstance.setProcess(oldProcess);
updateNodeInstances(processInstance, nodeMapping);
processInstance.setKnowledgeRuntime((InternalKnowledgeRuntime) kruntime);
processInstance.setProcess(process);
processInstance.reconnect();
}
}
/**
* Do the same as upgradeProcessInstance() but user provides mapping by node names, not by node id's
* @param kruntime
* @param activeProcessId
* @param newProcessId
* @param nodeNamesMapping
*/
public static void upgradeProcessInstanceByNodeNames(
KieRuntime kruntime,
Long fromProcessId,
String toProcessId,
Map nodeNamesMapping) {
Map nodeIdMapping = new HashMap();
String fromProcessIdString = kruntime.getProcessInstance(fromProcessId).getProcessId();
Process processFrom = kruntime.getKieBase().getProcess(fromProcessIdString);
Process processTo = kruntime.getKieBase().getProcess(toProcessId);
for (Map.Entry entry : nodeNamesMapping.entrySet()) {
String from = null;
Long to = null;
if (processFrom instanceof WorkflowProcess) {
from = getNodeId(((WorkflowProcess) processFrom).getNodes(), entry.getKey(), true);
} else if (processFrom instanceof RuleFlowProcess) {
from = getNodeId(((RuleFlowProcess) processFrom).getNodes(), entry.getKey(), true);
} else if (processFrom != null) {
throw new IllegalArgumentException("Suported processes are WorkflowProcess and RuleFlowProcess, it was:" + processFrom.getClass());
} else {
throw new IllegalArgumentException("Can not find process with id: " + fromProcessIdString);
}
if (processTo instanceof WorkflowProcess) {
to = Long.valueOf(getNodeId(((WorkflowProcess) processTo).getNodes(), entry.getValue(), false));
} else if (processTo instanceof RuleFlowProcess) {
to = Long.valueOf(getNodeId(((RuleFlowProcess) processTo).getNodes(), entry.getValue(), false));
} else if (processTo != null) {
throw new IllegalArgumentException("Suported processes are WorkflowProcess and RuleFlowProcess, it was:" + processTo.getClass());
} else {
throw new IllegalArgumentException("Can not find process with id: " + toProcessId);
}
nodeIdMapping.put(from, to);
}
upgradeProcessInstance(kruntime, fromProcessId, toProcessId, nodeIdMapping);
}
private static String getNodeId(Node[] nodes, String nodeName, boolean unique) {
Stack nodeStack = new Stack();
for (Node node : nodes) {
nodeStack.push(node);
}
Node match = null;
while (!nodeStack.isEmpty()) {
Node topNode = nodeStack.pop();
if (topNode.getName().compareTo(nodeName) == 0) {
match = topNode;
break;
}
if (topNode instanceof NodeContainer) {
for (Node node : ((NodeContainer) topNode).getNodes()) {
nodeStack.push(node);
}
}
}
if (match == null) {
throw new IllegalArgumentException("No node with name " + nodeName);
}
String id = "";
if (unique) {
while (!(match.getNodeContainer() instanceof Process)) {
id = ":" + match.getId() + id;
match = (Node) match.getNodeContainer();
}
}
id = match.getId() + id;
return id;
}
private static void updateNodeInstances(NodeInstanceContainer nodeInstanceContainer, Map nodeMapping) {
for (NodeInstance nodeInstance : nodeInstanceContainer.getNodeInstances()) {
String oldNodeId = ((NodeImpl)
((org.jbpm.workflow.instance.NodeInstance) nodeInstance).getNode()).getUniqueId();
Long newNodeId = nodeMapping.get(oldNodeId);
if (newNodeId == null) {
newNodeId = nodeInstance.getNodeId();
}
// clean up iteration levels for removed (old) nodes
Map iterLevels = ((WorkflowProcessInstanceImpl) nodeInstance.getProcessInstance()).getIterationLevels();
String uniqueId = (String) ((NodeImpl) nodeInstance.getNode()).getMetaData("UniqueId");
iterLevels.remove(uniqueId);
// and now set to new node id
((NodeInstanceImpl) nodeInstance).setNodeId(newNodeId);
if (nodeInstance instanceof NodeInstanceContainer) {
updateNodeInstances((NodeInstanceContainer) nodeInstance, nodeMapping);
}
}
}
}
