activiti5 使用自定義sql

最近在研究工做流activiti，把本身的開發過程作的驗證發表出來給你們參考，說的並不會很全，可是都是本身驗證能夠使用的。

有時候在使用activiti提供的api不知足業務的時候使用自定義sql

兩種：

1.xml配置：

<?xml version="1.0" encoding="UTF-8" ?>


<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="org.activiti.engine.impl.persistence.entity.HistoricProcessInstanceEntity">

 
  <select id="selectHistoricProcessInstanceIdsByProcessDefinitionId1" parameterType="org.activiti.engine.impl.db.ListQueryParameterObject" resultType="string">
    select ID_
    from ${prefix}ACT_HI_PROCINST 
    where PROC_DEF_ID_ = #{parameter}
  </select>
  

</mapper>

package com.newland.mango.rest.dao;

import java.io.InputStream;
import java.util.List;

import org.activiti.engine.impl.interceptor.Command;
import org.activiti.engine.impl.interceptor.CommandContext;

public class ProcessCmd  implements Command<List<String>> {

	@Override
	public List<String> execute(CommandContext commandContext) {
		List<String> processInstanceIds =commandContext.getDbSqlSession().selectList("selectHistoricProcessInstanceIdsByProcessDefinitionId1","cs:1:5004");
		// TODO Auto-generated method stub
		return processInstanceIds;
	}

}

Set customMybatisXMLMappers = new HashSet();
   customMybatisXMLMappers.add("com/newland/mango/rest/dao/HistoricProcessInstance.xml");
   processEngineConfiguration.setCustomMybatisXMLMappers(customMybatisXMLMappers);

xml的配置使用mybatis,本身複製了enginejar的配置，改了id作個實驗。

2.annotation配置：

public interface ProcessInstanceDao {
	  @Select({
	      "SELECT instance.proc_inst_id_ from act_hi_procinst instance,act_re_procdef definition ",
	      "where instance.proc_def_id_ =definition.id_"
	  })
	  List<Map<String, Object>> selectTaskWithSpecificVariable(String variableName);
}

Set<Class<?>> set = new HashSet<Class<?>>();
   set.add(ProcessInstanceDao.class);
   processEngineConfiguration.setCustomMybatisMappers(set);

List<Map<String,Object>> result = managementService.executeCustomSql(customSqlExecution);
  System.out.println("1111111111111:"+result.size());
  List processInstanceIds =managementService.executeCommand(new ProcessCmd());
  System.out.println("222222222:"+processInstanceIds.size());
  Model model = repositoryService.getModel(modelId);

兩種均可以，我更推薦第一種，其實若是是查詢，能夠使用各類service提供的本地查詢，能夠直接定義sql。