org.hibernate.HibernateException: The database returned no natively generated identity value - Spring Batch for MultiReaderHibernateWriter - spring-batch

Question

I am developing 'Multiresource ItemReader & HibernateItemWritter' from link: http://websystique.com/springbatch/spring-batch-multiresourceitemreader-hibernateitemwriter-example/. When I was running the Main program, I faced the below error:
Jul 27, 2016 12:27:36 AM org.springframework.batch.core.launch.support.SimpleJobLauncher afterPropertiesSet
INFO: No TaskExecutor has been set, defaulting to synchronous executor.
Jul 27, 2016 12:27:37 AM org.springframework.batch.core.launch.support.SimpleJobLauncher run
INFO: Job: [FlowJob: [name=examResultJob]] launched with the following parameters: [{}]
---------------------------------
ExamResult Job starts at :2016-07-27T00:27:37.294+05:30
Jul 27, 2016 12:27:37 AM org.springframework.batch.core.job.SimpleStepHandler handleStep
INFO: Executing step: [step1]
Processing result :ExamResult [id=0, studentName=Brian Burlet, dob=1985-02-01, percentage=76.0]
Processing result :ExamResult [id=0, studentName=Jimmy Snuka, dob=1983-02-01, percentage=39.0]
Processing result :ExamResult [id=0, studentName=Renard konig, dob=1970-02-01, percentage=61.0]
Processing result :ExamResult [id=0, studentName=Kevin Richard, dob=2002-02-01, percentage=59.0]
Processing result :ExamResult [id=0, studentName=Sam Disilva, dob=1992-05-01, percentage=76.0]
Processing result :ExamResult [id=0, studentName=Bob corbet, dob=1990-07-10, percentage=29.0]
Processing result :ExamResult [id=0, studentName=Rick Ricky, dob=1973-02-01, percentage=54.0]
Processing result :ExamResult [id=0, studentName=Igor Watson, dob=1986-02-01, percentage=34.0]
Processing result :ExamResult [id=0, studentName=Peet Sampras, dob=1978-02-01, percentage=97.0]
Processing result :ExamResult [id=0, studentName=Rita Paul, dob=1993-02-01, percentage=92.0]
Hibernate: insert into EXAM_RESULT (DOB, PERCENTAGE, STUDENT_NAME) values (?, ?, ?)
Jul 27, 2016 12:18:09 AM
org.springframework.batch.core.step.AbstractStep execute
SEVERE: Encountered an error executing step step1 in job examResultJob
org.hibernate.HibernateException: The database returned no natively generated identity value
at org.hibernate.id.IdentifierGeneratorHelper.getGeneratedIdentity(IdentifierGeneratorHelper.java:91)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:100)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3032)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3558)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:98)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:490)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:195)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:179)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:214)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:324)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:288)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:194)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:125)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:114)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
at org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:684)
at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:676)
at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:671)
at org.springframework.batch.item.database.HibernateItemWriter.doWrite(HibernateItemWriter.java:140)
at org.springframework.batch.item.database.HibernateItemWriter.write(HibernateItemWriter.java:113)
at org.springframework.batch.core.step.item.SimpleChunkProcessor.writeItems(SimpleChunkProcessor.java:175)
at org.springframework.batch.core.step.item.SimpleChunkProcessor.doWrite(SimpleChunkProcessor.java:151)
at org.springframework.batch.core.step.item.SimpleChunkProcessor.write(SimpleChunkProcessor.java:274)
at org.springframework.batch.core.step.item.SimpleChunkProcessor.process(SimpleChunkProcessor.java:199)
at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:75)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:406)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:330)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:271)
at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:81)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:374)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:257)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:200)
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148)
at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64)
at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:67)
at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:169)
at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:144)
at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:134)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:306)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128)
at com.websystique.springbatch.Main.main(Main.java:22)
Any pointers to solve the issue?
ExamResult.java
#Entity
#Table(name = "EXAM_RESULT")
public class ExamResult {
#Id
//#GeneratedValue(strategy = GenerationType.IDENTITY)
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
#Column(name = "STUDENT_NAME", nullable = false)
private String studentName;
#Column(name = "DOB", nullable = false)
#Type(type="org.jadira.usertype.dateandtime.joda.PersistentLocalDate")
private LocalDate dob;
#Column(name = "PERCENTAGE", nullable = false)
private double percentage;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public LocalDate getDob() {
return dob;
}
public void setDob(LocalDate dob) {
this.dob = dob;
}
public double getPercentage() {
return percentage;
}
public void setPercentage(double percentage) {
this.percentage = percentage;
}
#Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (int) (id ^ (id >>> 32));
return result;
}
#Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (!(obj instanceof ExamResult))
return false;
ExamResult other = (ExamResult) obj;
if (id != other.id)
return false;
return true;
}
#Override
public String toString() {
return "ExamResult [id=" + id + ", studentName=" + studentName
+ ", dob=" + dob + ", percentage=" + percentage + "]";
}
}
spring-batch-context.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:batch="http://www.springframework.org/schema/batch" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/batch
http://www.springframework.org/schema/batch/spring-batch.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="classpath:context-model.xml"/>
<!-- JobRepository and JobLauncher are configuration/setup classes -->
<bean id="jobRepository" class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean" />
<bean id="jobLauncher" class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
</bean>
<!-- ============= Multi Resource Item Reader ================== -->
<bean id="multiResourceItemReader" class="org.springframework.batch.item.file.MultiResourceItemReader">
<property name="resources" value="classpath:csv/ExamResult*.txt" />
<property name="delegate" ref="flatFileItemReader" />
</bean>
<!-- =========== ItemReader reads a complete line one by one from input file ============-->
<bean id="flatFileItemReader" class="org.springframework.batch.item.file.FlatFileItemReader" scope="step">
<property name="lineMapper">
<bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
<property name="fieldSetMapper">
<!-- Mapper which maps each individual items in a record to properties in POJO -->
<bean class="com.websystique.springbatch.ExamResultFieldSetMapper" />
</property>
<property name="lineTokenizer">
<!-- A tokenizer class to be used when items in input record are separated by specific characters -->
<bean class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
<property name="delimiter" value="|" />
</bean>
</property>
</bean>
</property>
</bean>
<!-- ItemWriter which writes data to database -->
<bean id="databaseItemWriter" class="org.springframework.batch.item.database.HibernateItemWriter">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!-- Optional ItemProcessor to perform business logic/filtering on the input records -->
<bean id="itemProcessor" class="com.websystique.springbatch.ExamResultItemProcessor" />
<!-- Optional JobExecutionListener to perform business logic before and after the job -->
<bean id="jobListener" class="com.websystique.springbatch.ExamResultJobListener" />
<!-- =========== Actual Job =========== -->
<batch:job id="examResultJob">
<batch:step id="step1">
<batch:tasklet transaction-manager="transactionManager">
<batch:chunk reader="multiResourceItemReader" writer="databaseItemWriter"
processor="itemProcessor" commit-interval="10" />
</batch:tasklet>
</batch:step>
<batch:listeners>
<batch:listener ref="jobListener" />
</batch:listeners>
</batch:job>
</beans>
context-model.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"
default-autowire="byName" default-init-method="init">
<import resource="classpath:context-datasource.xml"/>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" >
<property name="dataSource" ref="dataSource"/>
<property name="packagesToScan">
<list>
<value>com.websystique.springbatch.model</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<!-- <prop key="hibernate.format_sql">true</prop> -->
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager" />
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

Answer 1

Simply create exam_result like below:
CREATE TABLE `websystique`.`exam_result` (
`ID` INT NOT NULL AUTO_INCREMENT,
`STUDENT_NAME` VARCHAR(500) NULL,
`DOB` DATE NULL,
`PERCENTAGE` VARCHAR(500) NULL,
PRIMARY KEY (`ID`));