很多时候，JBPM自己提供的用户系统是不够用的，这时候就要求我们自己去扩展自己的用户体系。JBPM允许外挂一个用户体系。
如果想嵌入自己的用户体系，只需如下五步：
一：创建MesUser，MesGroup，MesMembership三个类，分别实现接口User,Group。由于类MesMembership是独立的，因此没有必要继承或实现其他接口。
Jbpm4提供了实现接口
interface User
interface Group
interface GroupMember
interface IdentitySession想要集成自己的表，首先需要实现jbpm提供的接口，然后再进行配置。
MesUser.java 用户表
package com.amnet.jbpm.identify;
import java.io.Serializable;
import java.sql.Blob;
import org.jbpm.api.identity.User;
public class MesUser implements Serializable, User {
private static final long serialVersionUID = 1L;
protected long dbid; // 数据库内部自生成的ID
private String id;
private String userNo;// 员工工号
private String userName;// 员工姓名
private String userSex;// 性别
private String userPassword;// 密码
private String userType;// 类型
private String userMail;// 电子邮件
private String isValid;// 是否有效Y/N
private Blob signaturePic;// 电子签名
private String remarks;// 备注
protected int dbversion;
public int getDbversion() {
return dbversion;
}
public MesUser() {
}
public MesUser(String id, String userName, String userMail) {
this.id = id;
this.userName = userName;
this.userMail = userMail;
}
public void setDbversion(int dbversion) {
this.dbversion = dbversion;
}
public long getDbid() {
return dbid;
}
public void setDbid(long dbid) {
this.dbid = dbid;
}
public void setId(String id) {
this.id = id;
}
public String getUserNo() {
return userNo;
}
public void setUserNo(String userNo) {
this.userNo = userNo;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserSex() {
return userSex;
}
public void setUserSex(String userSex) {
this.userSex = userSex;
}
public String getUserPassword() {
return userPassword;
}
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
public String getUserType() {
return userType;
}
public void setUserType(String userType) {
this.userType = userType;
}
public String getUserMail() {
return userMail;
}
public void setUserMail(String userMail) {
this.userMail = userMail;
}
public String getIsValid() {
return isValid;
}
public void setIsValid(String isValid) {
this.isValid = isValid;
}
public Blob getSignaturePic() {
return signaturePic;
}
public void setSignaturePic(Blob signaturePic) {
this.signaturePic = signaturePic;
}
public String getRemarks() {
return remarks;
}
public void setRemarks(String remarks) {
this.remarks = remarks;
}
public String getDisplayName() {
return userName + "(" + id + ")";
}
// 实现User接口所必须实现的几个方法
public String getId() {
return this.id;
}
public String getGivenName() {
return null;
}
public String getFamilyName() {
return null;
}
public String getBusinessEmail() {
return this.userMail;
}
}
MesGroup.java 部门表
package com.amnet.jbpm.identify;
import java.io.Serializable;
import org.jbpm.api.identity.Group;
public class MesGroup implements Serializable, Group {
private static final long serialVersionUID = 1L;
private String id;
private String groupName;// 组织名称
private String groupType;// 组织类型
private MesGroup parentGroup;// 父组织
private String remarks;// 备注
protected long dbid;
protected int dbversion;
public int getDbversion() {
return dbversion;
}
public void setDbversion(int dbversion) {
this.dbversion = dbversion;
}
public long getDbid() {
return dbid;
}
public void setDbid(long dbid) {
this.dbid = dbid;
}
public String getParentGroupID() {
return parentGroup != null ? parentGroup.getId() : null;
}
public String getParentGroupName() {
return parentGroup == null ? "xxx" : parentGroup.getGroupName();
}
public void setId(String id) {
this.id = id;
}
public String getGroupName() {
return groupName;
}
public void setGroupName(String groupName) {
this.groupName = groupName;
}
public String getGroupType() {
return groupType;
}
public void setGroupType(String groupType) {
this.groupType = groupType;
}
public MesGroup getParentGroup() {
return parentGroup;
}
public void setParentGroup(MesGroup parentGroup) {
this.parentGroup = parentGroup;
}
public String getRemarks() {
return remarks;
}
public void setRemarks(String remarks) {
this.remarks = remarks;
}
// 实现Group接口必须的几个方法
public String getName() {
return this.groupName;
}
public String getType() {
return this.groupType;
}
public String getId() {
return id;
}
}MesGroupMembership.java 用户部门关系表
package com.amnet.jbpm.identify;
import java.io.Serializable;
public class MesGroupMembership implements Serializable {
private static final long serialVersionUID = 1L;
protected long dbid;
protected int dbversion;
private MesUser user;
private MesGroup group;
protected String role;
public int getDbversion() {
return dbversion;
}
public void setDbversion(int dbversion) {
this.dbversion = dbversion;
}
public long getDbid() {
return dbid;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public void setDbid(long dbid) {
this.dbid = dbid;
}
public MesGroup getGroup() {
return group;
}
public void setGroup(MesGroup group) {
this.group = group;
}
public String getUserNo() {
return user.getUserNo();
}
public String getUserID() {
return user.getId();
}
public String getUserName() {
return user.getUserName();
}
public MesUser getUser() {
return user;
}
public void setUser(MesUser user) {
this.user = user;
}
}
二：第一步完成了，那么就开始第二步。第二步的主要任务就是将这些类映射到数据库里。由于JBPM的持久层的操作采用的是Hibernate进行的。所以我们必须编写一个Hibernate的映射文件将实体类映射到数据库。
jbpm.customize.identify.hbm.xml
上面的代码是仿照JBPM默认的映射文件jbpm.identity.hbm.xml写的。这个文件可以在JBPM的源代码里面找到，导入jar包时，它被封装在jbpm.jar里面。映射文件配置好了之后，在applicationContext.xml注入自己的mappingResources:
com/amnet/jbpm/identify/jbpm.customize.identify.hbm.xml
三：通过以上两步，就完成了由实体类到数据库的映射，也就是说，当你启动tomcat运行JBPM的时候，数据库里就会多出三张表：JBPM4_CUSTOMIZE_USER，JBPM4_CUSTOMIZE_GROUP，JBPM4_CUSTOMIZE_MEMBERSHIP。虽然如此，但是这只是利用了hibernate的自动生成数据表的功能产生了三个表而已，JBPM凭什么知道我需要使用的是我新创建的这三张表，而不会去调用原来的那三张表呢？答案是，他不知道。所以我们要继续进行配置。找到jbpm的一个配置文件叫：spring-jbpm4.xml。在这个文件里面原来有一句话：
import resource="jbpm.identity.cfg.xml"。我们可以去查看spring-jbpm4.xml的实际内容，结果里面就一句话：
在spring-jbpm4.xml注释掉jbpm4自己的cfg.xml文件
spring-jbpm4.xml
这样就OK了。下面的任务就是去实现MesIdentitySessionImpl中的方法了。
四：实现MesIdentitySessionImpl中的方法
MesIdentitySessionImpl.java 实现类
package com.amnet.jbpm.identify;
import java.util.Arrays;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;
import org.jbpm.api.JbpmException;
import org.jbpm.api.identity.Group;
import org.jbpm.api.identity.User;
import org.jbpm.pvm.internal.env.BasicEnvironment;
import org.jbpm.pvm.internal.env.EnvironmentImpl;
import org.jbpm.pvm.internal.id.DbidGenerator;
import org.jbpm.pvm.internal.identity.spi.IdentitySession;
@SuppressWarnings("unchecked")
public class MesIdentitySessionImpl implements IdentitySession {
protected Session session;
public MesIdentitySessionImpl() {
this.session = BasicEnvironment.getFromCurrent(Session.class);
}
// public String createH() {
//
// Test t = new Test();
//
// long dbid = EnvironmentImpl.getFromCurrent(DbidGenerator.class)
//
// .getNextId();
//
// t.setDbid(dbid);
//
// t.setId("abc");
//
// return null;
//
// }
public String createUser(String id, String userName,
String businessEmail, String familName) {
MesUser user = new MesUser(id, userName, businessEmail);
long dbid = EnvironmentImpl.getFromCurrent(DbidGenerator.class)
.getNextId();
user.setDbid(dbid);
session.save(user);
return user.getId();
}
public MesUser findUserById(String userId) {
return (MesUser) session.createCriteria(MesUser.class).add(
Restrictions.eq("id", userId)).uniqueResult();
}
public List findUsersById(String... userIds) {
List users = session.createCriteria(MesUser.class).add(
Restrictions.in("id", userIds)).list();
if (userIds.length != users.size()) {
throw new JbpmException("not all users were found: "
+ Arrays.toString(userIds));
}
return users;
}
public List findUsers() {
return session.createCriteria(MesUser.class).list();
}
public void deleteUser(String userId) {
// lookup the user
MesUser user = findUserById(userId);
// cascade the deletion to the memberships
List memberships = session.createCriteria(
MesGroupMembership.class).add(Restrictions.eq("user", user)).list();
// delete the related memberships
for (MesGroupMembership membership : memberships) {
session.delete(membership);
}
// delete the user
session.delete(user);
}
public String createGroup(String groupName, String groupType,
String parentGroupId) {
MesGroup group = new MesGroup();
String groupId = groupType != null ? groupType + "." + groupName
: groupName;
group.setId(groupId);
long dbid = EnvironmentImpl.getFromCurrent(DbidGenerator.class)
.getNextId();
group.setDbid(dbid);
group.setGroupName(groupName);
group.setGroupType(groupType);
if (parentGroupId != null) {
MesGroup parentGroup = findGroupById(parentGroupId);
group.setParentGroup(parentGroup);
}
session.save(group);
return group.getId();
}
public List findUsersByGroup(String groupId) {
return session.createCriteria(MesGroupMembership.class).createAlias(
"group", "g").add(Restrictions.eq("g.id", groupId))
.setProjection(Projections.property("user")).list();
}
public MesGroup findGroupById(String groupId) {
return (MesGroup) session.createCriteria(MesGroup.class).add(
Restrictions.eq("id", groupId)).uniqueResult();
}
public List findGroupsByUserAndGroupType(String userId,
String groupType) {
return session.createQuery(
"select distinct m.group" + " from "
+ MesGroupMembership.class.getName()
+ " as m where m.user.id = :userId"
+ " and m.group.type = :groupType").setString("userId",
userId).setString("groupType", groupType).list();
}
public List findGroupsByUser(String userId) {
List gList = session.createQuery(
"select distinct m.group" + " from "
+ MesGroupMembership.class.getName()
+ " as m where m.user.id = :userId").setString(
"userId", userId).list();
return gList;
}
public List findGroups() {
return session.createCriteria(MesGroup.class).list();
}
public void deleteGroup(String groupId) {
// look up the group
MesGroup group = findGroupById(groupId);
// cascade the deletion to the memberships
List memberships = session.createCriteria(
MesGroupMembership.class).add(Restrictions.eq("group", group))
.list();
// delete the related memberships
for (MesGroupMembership membership : memberships) {
session.delete(membership);
}
// delete the group
session.delete(group);
}
public void createMembership(String userId, String groupId, String role) {
MesUser user = findUserById(userId);
if (user == null) {
throw new JbpmException("user " + userId + " doesn't exist");
}
MesGroup group = findGroupById(groupId);
if (group == null) {
throw new JbpmException("group " + groupId + " doesn't exist");
}
MesGroupMembership membership = new MesGroupMembership();
membership.setUser(user);
membership.setGroup(group);
membership.setRole(role);
long dbid = EnvironmentImpl.getFromCurrent(DbidGenerator.class)
.getNextId();
membership.setDbid(dbid);
session.save(membership);
}
public void deleteMembership(String userId, String groupId, String role) {
MesGroupMembership membership = (MesGroupMembership) session
.createCriteria(
MesGroupMembership.class).createAlias("user", "u").createAlias(
"group", "g").add(Restrictions.eq("u.id", userId)).add(
Restrictions.eq("g.id", groupId)).uniqueResult();
session.delete(membership);
}
}
五：测试类
集成自己的表就完成了。当你调用 identityService.createUser()方法时，就往你自定义的user表里插入了一条记录。
TestMesIdentitySession.java 新建用户和组
package com.amnet.action;
import org.jbpm.api.IdentityService;
import org.jbpm.api.ProcessEngine;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestMesIdentitySession {
/**
* @param args
*/
public static void main(String[] args) {
ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
"applicationContext.xml");
applicationContext.start();
ProcessEngine processEngine = (ProcessEngine) applicationContext
.getBean("processEngine");
// ExecutionService executionService = processEngine.getExecutionService();
//
// TaskService taskService = processEngine.getTaskService();
IdentityService identityService = processEngine.getIdentityService();
identityService.createGroup("user_dept"); // 部门
identityService.createUser("user1", "test1", "test1"); // 新建用户1
identityService.createUser("user2", "test2", "test2"); // 新建用户2
identityService.createMembership("user1", "user_dept"); // 绑定用户和部门的关系
identityService.createMembership("user2", "user_dept");
}
}
发布流程
ProcessEngine processEngine = Configuration.getProcessEngine();
RepositoryService repositoryService = processEngine
.getRepositoryService();
String deployId = repositoryService.createDeployment().addResourceFromClasspath("com/contract/contract.jpdl.xml").deploy();删除流程
repositoryService.deleteDeploymentCascade(deployId));开始流程实例
executionService.startProcessInstanceById(request.getParameter("id"));