persistencesession.java

一个java工作流引擎

package org.jbpm.persistence;

import java.util.*;
import java.util.Collection;
import java.util.List;
import org.jbpm.model.definition.impl.*;

/**
 * is a session with a persistent object data store.
 */
public interface PersistenceSession {

  // object methods
  Object load(Class clazz, Long id);

  // finders...
  /**
   * @return the latest process definition or null if no such definition is present.
   */
  DefinitionImpl findLatestDefinition(String name);

  /**
   * retrieves the latest version of every process.
   */
  List findAllDefinitions();

  /**
   * retrieves the tasklist
   */
  Collection findTokensByActor(String actorId);

  /**
   * retrieves the undoable invocation logs for the given process definition
   * after (or at) the given date sorted by date (descending).
   */
  List findUndoableInvocationLogs(Long processInstanceId, Date date);

  /**
   * searches for all jobs that are past their dueDate.
   */
  Iterator findJobsToDo();

  /**
   * searches for all jobs by reference.
   */
  List findJobsByReference(String reference);
  
  /**
   * retrieves a file for the given definition.
   * used by the database file manager.
   */
  FileImpl findFile(Long definitionId, String fileName);

  /**
   * closes this session.
   */
  void close();

}