二十六、JbpmFacade简单实现
public class JbpmFacadeImpl extends AbstractManager implements JbpmFacade {
private JbpmConfiguration jbpmConfiguration;
public long addProcessInstance(String processName, Document document) {
JbpmContext context = getJbpmContext();
ProcessDefinition def = context.getGraphSession().findLatestProcessDefinition(processName);
ProcessInstance instance = new ProcessInstance(def);
instance.getContextInstance().setVariable("document", document.getId());
//将公文标题也提交到流程实例变量中，以便在E-Mail中能够提示这个公文的名称
instance.getContextInstance().setVariable("docTitle", document.getTitle());
//将公文的相关属性设置进入流程实例变量
Map props = document.getProperties();
if(props != null){
Set entries = props.entrySet();
for (Iterator iterator = entries.iterator(); iterator.hasNext();) {
Map.Entry entry = (Map.Entry) iterator.next();
String propertyName = (String)entry.getKey();
Object obj = document.getProperty(propertyName);
//将变量放入流程实例变量
instance.getContextInstance().setVariable(propertyName, obj);
}
}
context.save(instance);
return instance.getId();
}
public void delProcessDefinition(String processName) {
JbpmContext context = getJbpmContext();
List defs = context.getGraphSession().findAllProcessDefinitionVersions(processName);
for (Iterator iterator = defs.iterator(); iterator.hasNext();) {
ProcessDefinition def = (ProcessDefinition) iterator.next();
context.getGraphSession().deleteProcessDefinition(def);
}
}
public void delProcessInstance(long processInstanceId) {
JbpmContext context = getJbpmContext();
context.getGraphSession().deleteProcessInstance(processInstanceId);
}
public String deployProcessDefinition(byte[] processDef) {
JbpmContext context = getJbpmContext();
ProcessDefinition def = ProcessDefinition.parseXmlInputStream(
new ByteArrayInputStream(processDef)
);
context.deployProcessDefinition(def);
return def.getName();
}
public String nextStep(long processInstanceId, String actorId,
String transitionName) {
JbpmContext context = getJbpmContext();
ProcessInstance instance = context.getProcessInstance(processInstanceId);
//当前节点
String currentNodeName = instance.getRootToken().getNode().getName();
//起点的名称
String startNodeName = instance.getProcessDefinition().getStartState().getName();
//如果是在起点
if(startNodeName.equals(currentNodeName)){
if(transitionName == null){
instance.signal();
}else{
instance.signal(transitionName);
}
}else{
List taskInstances = context.getTaskMgmtSession().findTaskInstances(actorId);
for (Iterator iterator = taskInstances.iterator(); iterator
.hasNext();) {
TaskInstance ti = (TaskInstance) iterator.next();
if(ti.getProcessInstance().getId() == processInstanceId){
if(transitionName == null){
ti.end();
}else{
ti.end(transitionName);
}
break;
}
}
//查找所属组的任务实例
List pooledTaskInstances = context.getTaskMgmtSession().findPooledTaskInstances(actorId);
for (Iterator iterator = pooledTaskInstances.iterator(); iterator
.hasNext();) {
TaskInstance ti = (TaskInstance) iterator.next();
if(ti.getProcessInstance().getId() == processInstanceId){
if(transitionName == null){
ti.end();
}else{
ti.end(transitionName);
}
break;
}
}
}
//返回转向之后的节点名称
return instance.getRootToken().getNode().getName();
}
//回退
public Object[] backStep(long processInstanceId, String actorId) {
JbpmContext context = getJbpmContext();
//根据流程实例标识查找流程实例
ProcessInstance instance = context.getProcessInstance(processInstanceId);
Object[] os = new Object[2];
//搜索用户对应的所有的任务实例
List taskInstances = context.getTaskMgmtSession().findTaskInstances(actorId);
for (Iterator iterator = taskInstances.iterator(); iterator
.hasNext();) {
TaskInstance ti = (TaskInstance) iterator.next();
if(ti.getProcessInstance().getId() == processInstanceId){
//先判断是否是要回退到起点
Set set = ti.getToken().getNode().getArrivingTransitions();
for (Iterator iterator2 = set.iterator(); iterator2.hasNext();) {
Transition t = (Transition) iterator2.next();
//如果它需要回退到起点
if(t.getFrom().equals(ti.getProcessInstance().getProcessDefinition().getStartState())){
int docId = (Integer)ti.getProcessInstance().getContextInstance().getVariable("document");
//结束当前的流程实例
ti.getProcessInstance().end();
//结束当前任务实例
ti.end();
//重新创建流程实例对象
ProcessInstance pi = new ProcessInstance(ti.getProcessInstance().getProcessDefinition());
pi.getContextInstance().setVariable("document", docId);
//将流程实例对象重新持久化到数据库
context.save(pi);
os[0] = Document.STATUS_NEW;
os[1] = pi.getId();
return os;
}
}
//如果不需要回退到起点
ti.end(CreateTransitionAction.BACK_TRANSITION);
break;
}
}
os[0] = instance.getRootToken().getNode().getName();
os[1] = processInstanceId;
return os;
}
public List searchMyTaskList(String actorId) {
JbpmContext context = getJbpmContext();
List docIds = new ArrayList();
List taskInstances = context.getTaskMgmtSession().findTaskInstances(actorId);
for (Iterator iterator = taskInstances.iterator(); iterator.hasNext();) {
TaskInstance ti = (TaskInstance) iterator.next();
Integer docId = (Integer)ti.getProcessInstance().getContextInstance().getVariable("document");
docIds.add(docId);
}
//查找所属组的任务实例
List pooledTaskInstances = context.getTaskMgmtSession().findPooledTaskInstances(actorId);
for (Iterator iterator = pooledTaskInstances.iterator(); iterator
.hasNext();) {
TaskInstance ti = (TaskInstance) iterator.next();
Integer docId = (Integer)ti.getProcessInstance().getContextInstance().getVariable("document");
docIds.add(docId);
}
return docIds;
}
public List searchNextTransitions(long processInstanceId, String actorId) {
JbpmContext context = getJbpmContext();
ProcessInstance instance = context.getProcessInstance(processInstanceId);
//当前节点
String currentNodeName = instance.getRootToken().getNode().getName();
//起点的名称
String startNodeName = instance.getProcessDefinition().getStartState().getName();
Collection transitions = null;
//如果是在起点
if(startNodeName.equals(currentNodeName)){
transitions = instance.getRootToken().getAvailableTransitions();
}else{
List taskInstances = context.getTaskMgmtSession().findTaskInstances(actorId);
for (Iterator iterator = taskInstances.iterator(); iterator
.hasNext();) {
TaskInstance ti = (TaskInstance) iterator.next();
if(ti.getProcessInstance().getId() == processInstanceId){
transitions = ti.getAvailableTransitions();
break;
}
}
//查找所属组的任务实例
List pooledTaskInstances = context.getTaskMgmtSession().findPooledTaskInstances(actorId);
for (Iterator iterator = pooledTaskInstances.iterator(); iterator
.hasNext();) {
TaskInstance ti = (TaskInstance) iterator.next();
if(ti.getProcessInstance().getId() == processInstanceId){
transitions = ti.getAvailableTransitions();
}
}
}
List transitionNames = new ArrayList();
if(transitions != null){
//为了不把Transition对象直接暴露给OA系统，需要将其转换为名称列表
for (Iterator iterator = transitions.iterator(); iterator.hasNext();) {
Transition transition = (Transition) iterator.next();
transitionNames.add(transition.getName());
}
}
return transitionNames;
}
private JbpmContext getJbpmContext(){
JbpmContext context = jbpmConfiguration.createJbpmContext();
context.setSession(getSession());
return context;
}
public void setJbpmConfiguration(JbpmConfiguration jbpmConfiguration) {
this.jbpmConfiguration = jbpmConfiguration;
}
}