/*
* Copyright 2010 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.
*/
package org.drools.process.instance.impl;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import org.drools.WorkItemHandlerNotFoundException;
import org.drools.common.InternalKnowledgeRuntime;
import org.drools.process.instance.WorkItem;
import org.drools.process.instance.WorkItemManager;
import org.drools.runtime.process.ProcessInstance;
import org.drools.runtime.process.WorkItemHandler;
public class DefaultWorkItemManager implements WorkItemManager, Externalizable {
private static final long serialVersionUID = 510l;
private long workItemCounter;
private Map<Long, WorkItem> workItems = new ConcurrentHashMap<Long, WorkItem>();
private InternalKnowledgeRuntime kruntime;
private Map<String, WorkItemHandler> workItemHandlers = new HashMap<String, WorkItemHandler>();
public DefaultWorkItemManager(InternalKnowledgeRuntime kruntime) {
this.kruntime = kruntime;
}
@SuppressWarnings("unchecked")
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
workItemCounter = in.readLong();
workItems = (Map<Long, WorkItem>) in.readObject();
kruntime = (InternalKnowledgeRuntime) in.readObject();
workItemHandlers = (Map<String, WorkItemHandler>) in.readObject();
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeLong(workItemCounter);
out.writeObject(workItems);
out.writeObject(kruntime);
out.writeObject(workItemHandlers);
}
public void internalExecuteWorkItem(WorkItem workItem) {
((WorkItemImpl) workItem).setId(++workItemCounter);
internalAddWorkItem(workItem);
WorkItemHandler handler = this.workItemHandlers.get(workItem.getName());
if (handler != null) {
handler.executeWorkItem(workItem, this);
} else throw new WorkItemHandlerNotFoundException( "Could not find work item handler for " + workItem.getName(),
workItem.getName() );
}
public void internalAddWorkItem(WorkItem workItem) {
workItems.put(new Long(workItem.getId()), workItem);
// fix to reset workItemCounter after deserialization
if (workItem.getId() > workItemCounter) {
workItemCounter = workItem.getId();
}
}
public void internalAbortWorkItem(long id) {
WorkItemImpl workItem = (WorkItemImpl) workItems.get(new Long(id));
// work item may have been aborted
if (workItem != null) {
WorkItemHandler handler = this.workItemHandlers.get(workItem.getName());
if (handler != null) {
handler.abortWorkItem(workItem, this);
} else {
workItems.remove( workItem.getId() );
throw new WorkItemHandlerNotFoundException( "Could not find work item handler for " + workItem.getName(),
workItem.getName() );
}
workItems.remove(workItem.getId());
}
}
public Set<WorkItem> getWorkItems() {
return new HashSet<WorkItem>(workItems.values());
}
public WorkItem getWorkItem(long id) {
return workItems.get(id);
}
public void completeWorkItem(long id, Map<String, Object> results) {
WorkItem workItem = workItems.get(new Long(id));
// work item may have been aborted
if (workItem != null) {
(workItem).setResults(results);
ProcessInstance processInstance = kruntime.getProcessInstance(workItem.getProcessInstanceId());
(workItem).setState(WorkItem.COMPLETED);
// process instance may have finished already
if (processInstance != null) {
processInstance.signalEvent("workItemCompleted", workItem);
}
workItems.remove(new Long(id));
}
}
public void abortWorkItem(long id) {
WorkItemImpl workItem = (WorkItemImpl) workItems.get(new Long(id));
// work item may have been aborted
if (workItem != null) {
ProcessInstance processInstance = kruntime.getProcessInstance(workItem.getProcessInstanceId());
workItem.setState(WorkItem.ABORTED);
// process instance may have finished already
if (processInstance != null) {
processInstance.signalEvent("workItemAborted", workItem);
}
workItems.remove(new Long(id));
}
}
public void registerWorkItemHandler(String workItemName, WorkItemHandler handler) {
this.workItemHandlers.put(workItemName, handler);
}
public void clear() {
this.workItems.clear();
}
}