在jbpm3中实现会签时,好像大部分的方案都是通过 动态创建任务来实现的。
那么 在 jbpm4.0 中如何实现对应的功能呢?
其实在 jbpm4 中要实现这个功能 可能要比 在 jbpm3 中实现要来的简单。
在jbpm4 的 taskService 中提供了 newTask(String parentTaskId) 和 saveTask(Task task) 两个接口,通过这两个接口基本可以满足 会签的需要。
在subtask的创建上,刚搜到 小开ye 兄已经提供了一个思路, 就是在 提交到会签后,获取到会签的task,然后针对这个task创建 subtask
重新参考了jbpm4的文档,终于借助于 custome 类型 activity 来 模拟 task 的行为 来实现会签。
下面从头开始描述。
public interface CountersignInfo extends Serializable{ /** * 获取会签人员列表 * * @return */ public String[] getUsers(); /** * 获取会签接收人 * * @return */ public String getReceiver(); /** * 获取会签会议结论 * * @return */ public Conclusion getConclusion(); /** * 是否全部人员都已签完 * * @return */ public boolean isAllSign(); /** * 获取特定用户的会签结论 * @param userId * @return */ public Conclusion getUserConclusion(String userId); /** * 获取所有用户的会签结论 * @return */ public Map<String, Conclusion> getConclusions(); /** * 设置会签综合结论计算方式 * @param model */ public void setConclusionCalculator(CountersignCalculator model); /** * 获取会签结论计算方式 * @return */ public CountersignCalculator getConclusionCalculator(); /** * 会议结论定义 * * @author phoenix */ public enum Conclusion implements Serializable { // 通过 AGREE, // 否决 DENED, // 弃权 ABSTAIN } }
这里定义为接口是为了以后扩展方便。 这里包含了 会签人员、会签结论计算方式、会签接收人(汇总人),如果如要还可以设置会议组织者等信息。
2.在各种会签模式上(一票否决、半数通过、按比例通过等)的描述上,通过定义会签结论计算器 接口及起不同的实现来处理。
先看接口:
public interface CountersignCalculator extends Serializable { /** * * @param info * @return */ public Conclusion calculate(CountersignInfo info); }
一票否决的实现:
public class AllAgreeSign implements CountersignCalculator { /** * */ private static final long serialVersionUID = 1L; private static final Logger LOG = LoggerFactory.getLogger(AllAgreeSign.class); @Override public Conclusion calculate(CountersignInfo info) { // Map<String, Conclusion> conclusions = info.getConclusions(); for (Map.Entry<String, Conclusion> entry : info.getConclusions().entrySet()) { if (entry.getValue() != Conclusion.AGREE) { LOG.debug("用户 [{}] 否决,会签未通过", entry.getKey()); return Conclusion.DENED; } } return Conclusion.AGREE; } }
按比例通过的实现:
public class PercentAgreeSign implements CountersignCalculator { private static final Logger LOG = LoggerFactory.getLogger(PercentAgreeSign.class); public PercentAgreeSign() { } public PercentAgreeSign(int minAgreeSize) { this.minAgreeSize = minAgreeSize; } /** * */ private static final long serialVersionUID = 1L; public int minAgreeSize = 0; /** * @return the minAgreeSize */ public int getMinAgreeSize() { return minAgreeSize; } /** * @param minAgreeSize * the minAgreeSize to set */ public void setMinAgreeSize(int minAgreeSize) { this.minAgreeSize = minAgreeSize; } @Override public Conclusion calculate(CountersignInfo info) { Map<String, Conclusion> conclusions = info.getConclusions(); int agreeSize = 0; for (Conclusion conclusion : conclusions.values()) { if (conclusion == Conclusion.AGREE) { agreeSize++; } } LOG.debug("同意人数为 [{}] 最少同意人数[{}] 总意见数[{}]", new Object[] { agreeSize, minAgreeSize, conclusions.size() }); return (agreeSize >= minAgreeSize) ? Conclusion.AGREE : Conclusion.DENED; } }
半数通过只是比例的一种,因此不再提供额外的实现,只需要将总人数和最小通过人数设置好就可以了(会签发起前,参会人员应该都已经确定).
会签结论以枚举的形式定义在了会签信息接口中
3.定义custom类型activity节点的处理类。
先把代码贴上再予以说明
public class CountersignActivity extends JpdlExternalActivity { private static final Logger LOG = LoggerFactory.getLogger(CountersignActivity.class); /** * 默认的会签信息在上下文中的名字 */ public static final String DEFAULT_COUNTERSIGN_VAR_NAME = "COUNTERSIGN"; /** * */ private String counterignVarName = DEFAULT_COUNTERSIGN_VAR_NAME; /** * Task的名字,可以不设置,不设置时将采用Activity的名字 */ private String name; /** * @return the name */ public String getName() { return name; } /** * @param name * the name to set */ public void setName(String name) { this.name = name; } /** * */ private static final long serialVersionUID = 5125499454447181794L; /** * (non-Javadoc) * * @see org.jbpm.jpdl.internal.activity.TaskActivity#execute(org.jbpm.api.activity.ActivityExecution) */ @Override public void execute(ActivityExecution activityExecution) { ExecutionImpl execution = (ExecutionImpl) activityExecution; String taskName = StringUtils.isEmpty(name) ? execution.getActivityName() : name; // LOG.debug("执行 execution[{}]", execution); // LOG.debug("是否是 ActivityBehaviour 的实例 [{}]" + (this instanceof ActivityBehaviour)); // LOG.debug("name 为 [{}]", taskName); // LOG.debug("从 execution 中取到的 Activity [{}] 的名字为 [{}]", execution.getActivity(), execution.getActivity() // .getName()); CountersignInfo countersignInfo = getCountersignInfo(execution); // 创建主任务 DbSession dbSession = Environment.getFromCurrent(DbSession.class); TaskImpl task = (TaskImpl) dbSession.createTask(); task.setExecution(execution); task.setProcessInstance((ExecutionImpl) execution.getProcessInstance()); task.setSignalling(true); task.setName(taskName); dbSession.save(task); HistoryEvent.fire(new TaskActivityStart(task), (ExecutionImpl) execution); // 创建子任务 for (String countersigner : countersignInfo.getUsers()) { TaskImpl subtask = (TaskImpl) dbSession.createTask(); LOG.debug("父任务ID为[{}]", task.getDbid()); // subTask.setSuperTaskDbid(task.getDbid()); task.addSubTask(subtask); subtask.setAssignee(countersigner); subtask.setName(taskName + "." + countersigner); subtask.setProcessInstance((ExecutionImpl) execution.getProcessInstance()); // 这里一定设置为false,设置为true时,completeTask 会触发 signal // 参见 TaskImpl.complete() 方法 // subTask.setSignalling(false); dbSession.save(subtask); // 触发事件 HistoryEvent.fire(new TaskActivityStart(subtask), (ExecutionImpl) execution); } execution.waitForSignal(); } /** * (non-Javadoc) * * @see org.jbpm.jpdl.internal.activity.TaskActivity#signal(org.jbpm.api.activity.ActivityExecution, * java.lang.String, java.util.Map) */ @Override public void signal(ActivityExecution activityExecution, String signalName, Map<String, ?> parameters) throws Exception { ExecutionImpl execution = (ExecutionImpl) activityExecution; // LOG.debug("根据会签结论进行跳转"); CountersignInfo countersignInfo = getCountersignInfo(execution); LOG.debug("会签结论为 [{}] 接收人为 [{}]", countersignInfo.getConclusion(), countersignInfo.getReceiver()); if (parameters != null) { execution.setVariables(parameters); } Activity activity = execution.getActivity(); execution.fire(signalName, activity); Transition transition = null; LOG.debug("signalName [{}], outGoingSize [{}]", signalName, activity.getOutgoingTransitions().size()); if ((signalName == null) || ((Task.STATE_COMPLETED.equals(signalName)) && (activity.getOutgoingTransitions() != null) && (activity .getOutgoingTransitions().size() == 1))) { LOG.debug("use default transaction for[{}] execution[{}]", activityExecution.getActivityName(), execution); transition = activity.getOutgoingTransitions().get(0); } else { transition = activity.findOutgoingTransition(signalName); } LOG.debug("执行跳转 [{}]", transition); if (transition != null) { execution.historyActivityEnd(signalName); execution.take(transition); } else { LOG.error("transition 为null,execution[{}] 继续等待", execution); execution.waitForSignal(); } } /** * * @param execution * @return */ protected CountersignInfo getCountersignInfo(ActivityExecution execution) { return (CountersignInfo) execution.getVariable(counterignVarName); } }
明天补充代码说明及如何使用
(待续)