Hi, I am trying to develop my own custom mybatis queries, however I am stuck with
org.apache.ibatis.exceptions.PersistenceException:
Error querying database. Cause: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘prefix’ in ‘class org.camunda.bpm.engine.impl.db.ListQueryParameterObject’
Cause: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘prefix’ in ‘class org.camunda.bpm.engine.impl.db.ListQueryParameterObject’
I followed the tutorial camunda-7-code-examples/snippets/custom-queries at main · camunda-consulting/camunda-7-code-examples · GitHub. As I have spring boot application, I have defines the session factory as bean.
@Configuration
public class CustomQueryConfiguration {
@Autowired private ProcessEngine processEngine;
public Properties getSqlSessionFactoryProperties(ProcessEngineConfigurationImpl conf) { Properties properties = new Properties(); ProcessEngineConfigurationImpl.initSqlSessionFactoryProperties(properties, conf.getDatabaseTablePrefix(), conf.getDatabaseType()); return properties; }
@Bean public SqlSessionFactory createMyBatisSqlSessionFactory() { InputStream config = this.getClass().getResourceAsStream("/customMybatisConfiguration.xml");;
ProcessEngineConfiguration processEngineConfiguration = processEngine.getProcessEngineConfiguration(); DataSource dataSource = processEngineConfiguration.getDataSource();
// use this transaction factory if you work in a non transactional // environment // TransactionFactory transactionFactory = new JdbcTransactionFactory();
// use this transaction factory if you work in a transactional // environment (e.g. called within the engine or using JTA) TransactionFactory transactionFactory = new ManagedTransactionFactory();
Environment environment = new Environment("customTasks", transactionFactory, dataSource);
XMLConfigBuilder parser = new XMLConfigBuilder( // new InputStreamReader(config), // "", // set environment later via code getSqlSessionFactoryProperties((ProcessEngineConfigurationImpl) processEngineConfiguration)); org.apache.ibatis.session.Configuration configuration = parser.getConfiguration(); configuration.setEnvironment(environment); configuration = parser.parse();
configuration.setDefaultStatementTimeout(processEngineConfiguration.getJdbcStatementTimeout());
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(configuration); return sqlSessionFactory; }
}
Here is the implementing service.
@Service(“customTaskServiceImpl”)
public class CustomTaskServiceImpl implements CustomTaskService {
private SqlSessionFactory sqlSessionFactory;
@Autowired public CustomTaskServiceImpl(SqlSessionFactory sqlSessionFactory) { this.sqlSessionFactory = sqlSessionFactory; }
@Override public List<Task> getTrackedTasks(){ try (SqlSession sqlSession = sqlSessionFactory.openSession()){ //the region is not realy needed, its here for future, because i will be using parameters String region = "hovno"; ListQueryParameterObject queryParameterObject = new ListQueryParameterObject(); queryParameterObject.setParameter(region); List<Task> tasks = sqlSession.selectList("customTask.selectTrivialTaskByQueryCriteria",queryParameterObject); return tasks; } }}
And here is my mapping file:
<?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="customTask">
<select id="selectTrivialTaskByQueryCriteria" parameterType="org.camunda.bpm.engine.impl.db.ListQueryParameterObject" resultMap="taskResultMap">
<!-- select ${distinct} -->
select
<include refid="columnSelection"/>
from ${prefix}ACT_RU_TASK RES
</select>
<sql id="columnSelection">
RES.REV_, RES.ID_, RES.NAME_, RES.PARENT_TASK_ID_, RES.DESCRIPTION_, RES.PRIORITY_,
RES.CREATE_TIME_, RES.OWNER_, RES.ASSIGNEE_, RES.DELEGATION_, RES.EXECUTION_ID_,
RES.PROC_INST_ID_, RES.PROC_DEF_ID_, RES.CASE_EXECUTION_ID_, RES.CASE_INST_ID_,
RES.CASE_DEF_ID_, RES.TASK_DEF_KEY_, RES.DUE_DATE_, RES.FOLLOW_UP_DATE_,
RES.SUSPENSION_STATE_, RES.TENANT_ID_
</sql>
<resultMap id="taskResultMap" type="org.camunda.bpm.engine.impl.persistence.entity.TaskEntity">
<id property="id" column="ID_" jdbcType="VARCHAR"/>
<result property="revision" column="REV_" jdbcType="INTEGER"/>
<result property="nameWithoutCascade" column="NAME_" jdbcType="VARCHAR"/>
<result property="parentTaskIdWithoutCascade" column="PARENT_TASK_ID_" jdbcType="VARCHAR"/>
<result property="descriptionWithoutCascade" column="DESCRIPTION_" jdbcType="VARCHAR"/>
<result property="priorityWithoutCascade" column="PRIORITY_" jdbcType="INTEGER"/>
<result property="createTime" column="CREATE_TIME_" jdbcType="TIMESTAMP" />
<result property="ownerWithoutCascade" column="OWNER_" jdbcType="VARCHAR"/>
<result property="assigneeWithoutCascade" column="ASSIGNEE_" jdbcType="VARCHAR"/>
<result property="delegationStateString" column="DELEGATION_" jdbcType="VARCHAR"/>
<result property="executionId" column="EXECUTION_ID_" jdbcType="VARCHAR" />
<result property="processInstanceId" column="PROC_INST_ID_" jdbcType="VARCHAR" />
<result property="processDefinitionId" column="PROC_DEF_ID_" jdbcType="VARCHAR"/>
<result property="caseExecutionId" column="CASE_EXECUTION_ID_" jdbcType="VARCHAR" />
<result property="caseInstanceIdWithoutCascade" column="CASE_INST_ID_" jdbcType="VARCHAR" />
<result property="caseDefinitionId" column="CASE_DEF_ID_" jdbcType="VARCHAR"/>
<result property="taskDefinitionKeyWithoutCascade" column="TASK_DEF_KEY_" jdbcType="VARCHAR"/>
<result property="dueDateWithoutCascade" column="DUE_DATE_" jdbcType="TIMESTAMP"/>
<result property="followUpDateWithoutCascade" column="FOLLOW_UP_DATE_" jdbcType="TIMESTAMP"/>
<result property="suspensionState" column="SUSPENSION_STATE_" jdbcType="INTEGER" />
<result property="tenantId" column="TENANT_ID_" jdbcType="VARCHAR" />
<!-- note: if you add mappings here, make sure to select the columns in 'columnSelection' -->
</resultMap>
</mapper>
I guess I am missing something in the session factory creation. How can I get the ${prefix} directive working? Without using it, the execution of the select works.
