/**
* Copyright 2005 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.process.instance.impl;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.drools.core.common.InternalKnowledgeRuntime;
import org.drools.core.util.MVELSafeHelper;
import org.jbpm.process.core.Context;
import org.jbpm.process.core.ContextContainer;
import org.jbpm.process.core.impl.XmlProcessDumper;
import org.jbpm.process.core.impl.XmlProcessDumperFactory;
import org.jbpm.process.instance.ContextInstance;
import org.jbpm.process.instance.InternalProcessRuntime;
import org.jbpm.process.instance.ProcessInstance;
import org.jbpm.workflow.instance.WorkflowProcessInstance;
import org.jbpm.workflow.instance.impl.ProcessInstanceResolverFactory;
import org.kie.api.definition.process.Process;
import org.kie.api.runtime.rule.Agenda;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Default implementation of a process instance.
*
*/
public abstract class ProcessInstanceImpl implements ProcessInstance, Serializable {
protected static final Pattern PARAMETER_MATCHER = Pattern.compile("#\\{([\\S&&[^\\}]]+)\\}", Pattern.DOTALL);
private static final Logger logger = LoggerFactory.getLogger(ProcessInstanceImpl.class);
private static final long serialVersionUID = 510l;
private long id;
private String processId;
private transient Process process;
private String processXml;
private int state = STATE_PENDING;
private Map<String, ContextInstance> contextInstances = new HashMap<String, ContextInstance>();
private Map<String, List<ContextInstance>> subContextInstances = new HashMap<String, List<ContextInstance>>();
private transient InternalKnowledgeRuntime kruntime;
private Map<String, Object> metaData = new HashMap<String, Object>();
private String outcome;
private long parentProcessInstanceId;
private String description;
public void setId(final long id) {
this.id = id;
}
public long getId() {
return this.id;
}
public void setProcess(final Process process) {
this.processId = process.getId();
this.process = ( Process ) process;
}
public void updateProcess(final Process process) {
setProcess(process);
XmlProcessDumper dumper = XmlProcessDumperFactory.newXmlProcessDumperFactory();
this.processXml = dumper.dumpProcess(process);
}
public String getProcessXml() {
return processXml;
}
public void setProcessXml(String processXml) {
if (processXml != null && processXml.trim().length() > 0) {
this.processXml = processXml;
}
}
public Process getProcess() {
if (this.process == null) {
if (processXml == null) {
if (kruntime == null) {
throw new IllegalStateException("Process instance " + id + "[" + processId + "] is disconnected.");
}
this.process = kruntime.getKieBase().getProcess(processId);
} else {
XmlProcessDumper dumper = XmlProcessDumperFactory.newXmlProcessDumperFactory();
this.process = dumper.readProcess(processXml);
}
}
return this.process;
}
public void setProcessId(String processId) {
this.processId = processId;
}
public String getProcessId() {
return processId;
}
public String getProcessName() {
return getProcess().getName();
}
public void setState(final int state) {
internalSetState(state);
}
public void setState(final int state, String outcome) {
this.outcome = outcome;
internalSetState(state);
}
public void internalSetState(final int state) {
this.state = state;
}
public int getState() {
return this.state;
}
public void setKnowledgeRuntime(final InternalKnowledgeRuntime kruntime) {
if ( this.kruntime != null ) {
throw new IllegalArgumentException( "Runtime can only be set once." );
}
this.kruntime = kruntime;
}
public InternalKnowledgeRuntime getKnowledgeRuntime() {
return this.kruntime;
}
public Agenda getAgenda() {
if (getKnowledgeRuntime() == null) {
return null;
}
return getKnowledgeRuntime().getAgenda();
}
public ContextContainer getContextContainer() {
return ( ContextContainer ) getProcess();
}
public void setContextInstance(String contextId, ContextInstance contextInstance) {
this.contextInstances.put(contextId, contextInstance);
}
public ContextInstance getContextInstance(String contextId) {
ContextInstance contextInstance = this.contextInstances.get(contextId);
if (contextInstance != null) {
return contextInstance;
}
Context context = ((ContextContainer)getProcess()).getDefaultContext(contextId);
if (context != null) {
contextInstance = getContextInstance(context);
return contextInstance;
}
return null;
}
public List<ContextInstance> getContextInstances(String contextId) {
return this.subContextInstances.get(contextId);
}
public void addContextInstance(String contextId, ContextInstance contextInstance) {
List<ContextInstance> list = this.subContextInstances.get(contextId);
if (list == null) {
list = new ArrayList<ContextInstance>();
this.subContextInstances.put(contextId, list);
}
list.add(contextInstance);
}
public void removeContextInstance(String contextId, ContextInstance contextInstance) {
List<ContextInstance> list = this.subContextInstances.get(contextId);
if (list != null) {
list.remove(contextInstance);
}
}
public ContextInstance getContextInstance(String contextId, long id) {
List<ContextInstance> contextInstances = subContextInstances.get(contextId);
if (contextInstances != null) {
for (ContextInstance contextInstance: contextInstances) {
if (contextInstance.getContextId() == id) {
return contextInstance;
}
}
}
return null;
}
public ContextInstance getContextInstance(final Context context) {
ContextInstanceFactory conf = ContextInstanceFactoryRegistry.INSTANCE.getContextInstanceFactory(context);
if (conf == null) {
throw new IllegalArgumentException("Illegal context type (registry not found): " + context.getClass());
}
ContextInstance contextInstance = (ContextInstance) conf.getContextInstance(context, this, this);
if (contextInstance == null) {
throw new IllegalArgumentException("Illegal context type (instance not found): " + context.getClass());
}
return contextInstance;
}
public void signalEvent(String type, Object event) {
}
public void start() {
start(null);
}
public void start(String trigger) {
synchronized (this) {
if ( getState() != ProcessInstanceImpl.STATE_PENDING ) {
throw new IllegalArgumentException( "A process instance can only be started once" );
}
setState( ProcessInstanceImpl.STATE_ACTIVE );
internalStart(trigger);
}
}
protected abstract void internalStart(String trigger);
public void disconnect() {
((InternalProcessRuntime) kruntime.getProcessRuntime()).getProcessInstanceManager().internalRemoveProcessInstance(this);
process = null;
kruntime = null;
}
public void reconnect() {
((InternalProcessRuntime) kruntime.getProcessRuntime()).getProcessInstanceManager().internalAddProcessInstance(this);
}
public String[] getEventTypes() {
return null;
}
public String toString() {
final StringBuilder b = new StringBuilder( "ProcessInstance " );
b.append( getId() );
b.append( " [processId=" );
b.append( this.process.getId() );
b.append( ",state=" );
b.append( this.state );
b.append( "]" );
return b.toString();
}
public Map<String, Object> getMetaData() {
return this.metaData;
}
public void setMetaData(String name, Object data) {
this.metaData.put(name, data);
}
public void setOutcome(String outcome) {
this.outcome = outcome;
}
public String getOutcome() {
return outcome;
}
public long getParentProcessInstanceId() {
return parentProcessInstanceId;
}
public void setParentProcessInstanceId(long parentProcessInstanceId) {
this.parentProcessInstanceId = parentProcessInstanceId;
}
public String getDescription() {
if (description == null) {
description = process.getName();
if (process != null) {
Object metaData = process.getMetaData().get("customDescription");
if (metaData instanceof String) {
String customDescription = (String) metaData;
Map<String, String> replacements = new HashMap<String, String>();
Matcher matcher = PARAMETER_MATCHER.matcher(customDescription);
while (matcher.find()) {
String paramName = matcher.group(1);
if (replacements.get(paramName) == null) {
try {
String value = (String) MVELSafeHelper.getEvaluator()
.eval(paramName,new ProcessInstanceResolverFactory(((WorkflowProcessInstance) this)));
replacements.put(paramName, value);
} catch (Throwable t) {
logger.error("Could not resolve customDescription, parameter " + paramName, t);
logger.error("Continuing without setting description.");
}
}
}
for (Map.Entry<String, String> replacement : replacements.entrySet()) {
customDescription = customDescription.replace("#{" + replacement.getKey() + "}", replacement.getValue());
}
description = customDescription;
}
}
}
return description;
}
public void setDescription(String description) {
this.description = description;
}
}