Liferay7 BPM门户开发之46: 集成Activiti用户、用户组、成员关系同步

在实际的BPM集成开发过程中，Liferay和Activiti这两个异构的系统之间，用户、组的同步需求非常重要，用来实现签收组的概念，比如指定签收组、会签、抢签都需要用到。

Activiti可以通过自定义实现SessionFactory，实现customUserManager和customRoleManager的方式集成第三方的用户关系。

这里我介绍一个方法，可以借助Liferay的实体监听器来做用户、组、用户-组成员关系的三种同步。

其实实现原理非常简单

用户组的同步，就是实现 BaseModelListener 泛型接口

package com.lifiti.hooks;

import org.osgi.service.component.annotations.Component;
import com.liferay.portal.kernel.exception.ModelListenerException;
import com.liferay.portal.kernel.model.BaseModelListener;
import com.liferay.portal.kernel.model.ModelListener;
import com.liferay.portal.kernel.model.UserGroup;
import com.lifiti.util.IdentifyHelper;

@Component(immediate = true, service = ModelListener.class)
public class UserGroupListener extends BaseModelListener<UserGroup>{
    
    @Override
    public void onAfterCreate(UserGroup ug) throws ModelListenerException{
        System.out.println(ug.getUuid()+ug.getName() + " Added.");
        IdentifyHelper.saveGroup(ug.getUuid(), ug.getName(), 1);
    }
    
    @Override
    public void onAfterRemove(UserGroup ug) throws ModelListenerException {
        System.out.println(ug.getName() + " Deleted.");
        IdentifyHelper.delGroup(ug.getUuid());
    }

    @Override
    public void onAfterUpdate(UserGroup ug) throws ModelListenerException {
        System.out.println(ug.getName() + " Modified.");
        IdentifyHelper.delGroup(ug.getUuid());
        IdentifyHelper.saveGroup(ug.getUuid(), ug.getName(), 1);
    }


}

用户，成员关系的同步

其中onAfterAddAssociation 就是监听成员关系，可以在liferay的users_usergroups表和activiti的act_id_membership查看

实际上就是一个关联中间表

package com.lifiti.hooks;

import org.osgi.service.component.annotations.Component;
import com.liferay.portal.kernel.exception.ModelListenerException;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.model.BaseModelListener;
import com.liferay.portal.kernel.model.ModelListener;
import com.liferay.portal.kernel.model.User;
import com.liferay.portal.kernel.service.UserGroupLocalServiceUtil;
import com.liferay.portal.kernel.service.UserLocalServiceUtil;
import com.lifiti.util.IdentifyHelper;

@Component(immediate = true, service = ModelListener.class)
public class UserListener extends BaseModelListener<User> {

    @Override
    public void onAfterCreate(User u) throws ModelListenerException {
        System.out.println(u.getScreenName() + " Added.");
        IdentifyHelper.saveUser(u.getScreenName(), u.getLastName() + u.getFirstName(), u.getEmailAddress());
    }

    @Override
    public void onAfterRemove(User u) throws ModelListenerException {
        System.out.println(u.getUserId() + " Deleted.");
        IdentifyHelper.delUser(u.getScreenName());
    }

    @Override
    public void onAfterUpdate(User u) throws ModelListenerException {
        System.out.println(u.getUserId() + " Modified.");
        IdentifyHelper.delUser(u.getScreenName());
        IdentifyHelper.saveUser(u.getScreenName(), u.getLastName() + u.getFirstName(), u.getEmailAddress());
    }

    @Override
    public void onAfterAddAssociation(Object classPK, String associationClassName, Object associationClassPK)
            throws ModelListenerException {
        try {
            //对关系类型进行过滤,比如com.liferay.portal.kernel.model.UserRole先不处理
            if ("com.liferay.portal.kernel.model.UserGroup".equals(associationClassName)) {
                IdentifyHelper.createMembership(
                        UserLocalServiceUtil.getUser(Long.parseLong(classPK.toString())).getScreenName(),
                        UserGroupLocalServiceUtil.getUserGroup(Long.parseLong(associationClassPK.toString()))
                                .getUuid());
                System.out.println(classPK.toString() + "#" + associationClassName + "#" + associationClassPK.toString()
                        + " associationClassName Modified.");
            }
        } catch (NumberFormatException e) {
            e.printStackTrace();
        } catch (PortalException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onAfterRemoveAssociation(Object classPK, String associationClassName, Object associationClassPK)
            throws ModelListenerException {    
        try {
            if ("com.liferay.portal.kernel.model.UserGroup".equals(associationClassName)) {
                IdentifyHelper.deleteMembership(
                        UserLocalServiceUtil.getUser(Long.parseLong(classPK.toString())).getScreenName(),
                        UserGroupLocalServiceUtil.getUserGroup(Long.parseLong(associationClassPK.toString()))
                                .getUuid());
                System.out.println(classPK.toString() + "#" + associationClassName + "#" + associationClassPK.toString()
                        + " associationClassName Removed.");
            }
        } catch (NumberFormatException e) {
            e.printStackTrace();
        } catch (PortalException e) {
            e.printStackTrace();
        }
    }

}