Spring batch_configuring a Step for Restart

Spring batch_configuring a Step for Restart

Spring Official Document: Http://docs.spring.io/spring-batch/trunk/reference/html/configureStep.html#stepRestart

When an ordinary job is in the state of complete, it cannot be restart. Let's see how to make a job restart.

Restartable= "true"

<job id= "Footballjob" restartable= "false" > ...</job>

The job should be configured to restartable= "true" first.

Then see how the step is configured:

Allow-start-if-complete= "true"

This is set when the step is complete, it can also be restarted. This default value is False.

start-limit= "3"

This is the number of times the setting can be restarted, and the default value is Integer.max_value.

Here is a demo from the official Spring document:

<job id= "Footballjob" restartable= "true" ><step id= "Playerload" next= "Gameload" ><tasklet>< Chunk reader= "Playerfileitemreader" writer= "Playerwriter" commit-interval= "/></tasklet></step>" <step id= "Gameload" next= "playersummarization" ><tasklet allow-start-if-complete= "true" ><chunk Reader= "Gamefileitemreader" writer= "Gamewriter" commit-interval= "ten"/></tasklet></step><step ID = "Playersummarization" ><tasklet start-limit= "3" ><chunk reader= "Playersummarizationsource" writer= " Summarywriter "Commit-interval="/></tasklet></step></job>

Here is my configuration for restart:

Spring-batch-restart.xml

<beans xmlns= "Http://www.springframework.org/schema/beans" xmlns:xsi= "http://www.w3.org/2001/ Xmlschema-instance " xmlns:batch=" Http://www.springframework.org/schema/batch "xmlns:context="/HTTP/ Www.springframework.org/schema/context "xsi:schemalocation=" http://www.springframework.org/schema/beans  Http://www.springframework.org/schema/beans/spring-beans-4.0.xsdhttp://www.springframework.org/schema/batch  http://www.springframework.org/schema/batch/spring-batch.xsdhttp://www.springframework.org/schema/ Context http://www.springframework.org/schema/context/spring-context.xsd "><!--  Pack Scan  -- ><context:component-scan base-package= "Com.lyx.batch"  /><bean id= "ExceptionHandler"  class= "Com.lyx.batch.ExceptionListener"  /><batch:step id= "Abstractstep"  abstract= " True "><batch:listeners><batch:listener ref=" Exceptionhandler " /></batch:listeners ></batch:step><bean id= "ABstractcursorreader " abstract=" true "class=" Org.springframework.batch.item.database.JdbcCursorItemReader " ><property name= "DataSource"  ref= "DataSource"  /></bean><!-- add  People desc job begin  --><batch:job id= "AddPeopleDescJob"   Restartable= "true" ><batch:step id= "Adddescstep"  parent= "Abstractstep" ><batch:tasklet  allow-start-if-complete= "true" start-limit= "2" ><batch:chunk reader= "Peopleadddescreader"   Processor= "Adddescprocessor" writer= "Adddescpeoplewriter"  commit-interval= "2"  /></batch:tasklet ></batch:step></batch:job><!-- add people desc job end  - -><bean id= "Peopleadddescreader"  parent= "Abstractcursorreader" scope= "Step" ><property  name= "SQL" ><value><! [Cdata[select first_name ,last_name from people where first_name like&NBSP;?&NBSP;OR&NBSP;LAST_NAME&NBSP;LIKE&NBSP;]] ></value></property><property name= "RowMapper"  ref= "PeopleRowMapper"  /> <property name= "PreparedStatementSetter"  ref= "PreparedStatementSetter"  /><property  name= "Fetchsize"  value= " /></bean><bean id=" Peoplerowmapper " class=" Com.lyx.batch.PeopleRowMapper " /><bean id=" PreparedStatementSetter " class=" Com.lyx.batch.PeoplePreparedStatementSetter " /><bean id=" Adddescprocessor " class=" Com.lyx.batch.AddPeopleDescProcessor " /><bean id=" Adddescpeoplewriter " class=" Com.lyx.batch.AddDescPeopleWriter " /><!--tomcat jdbc pool Data Source Configuration  --><bean  Id= "DataSource"  class= "Org.apache.tomcat.jdbc.pool.DataSource" destroy-method= "Close" ><property  name= "Poolproperties" ><bean class= "Org.apache.tomcat.jdbc.pool.PoolProperties" >< property Name= "Driverclassname"  value= "com.mysql.jdbc.Driver"  /><property name= "url"  value= " Jdbc:mysql://localhost:3306/test " /><property name=" username " value=" root " />< Property name= "Password"  value= "034039"  /></bean></property></bean><!--  spring batch  configuration jobrepository --><batch:job-repository id= "Jobrepository" Data-source= "DataSource"  transaction-manager= "TransactionManager" isolation-level-for-create= "REPEATABLE_ READ " table-prefix=" Batch_ "max-varchar-length="  /><!-- spring transaction manager  -->< Bean id= "TransactionManager" class= "Org.springframework.jdbc.datasource.DataSourceTransactionManager" > <property name= "DataSource"  ref= "DataSource"  /></bean><!-- batch  Luncher --><bean id= "Joblauncher" class= " Org.springframework.batch.core.launch.support.SimpleJobLauncher "><propertY name= "Jobrepository"  ref= "Jobrepository"  /></bean></beans> 

Appmain8.java

package com.lyx.batch;import org.springframework.batch.core.exitstatus;import  org.springframework.batch.core.job;import org.springframework.batch.core.jobexecution;import  org.springframework.batch.core.jobparametersbuilder;import  org.springframework.batch.core.jobparametersinvalidexception;import  org.springframework.batch.core.launch.joblauncher;import  org.springframework.batch.core.repository.jobexecutionalreadyrunningexception;import  org.springframework.batch.core.repository.jobinstancealreadycompleteexception;import  org.springframework.batch.core.repository.jobrestartexception;import  org.springframework.context.applicationcontext;import  org.springframework.context.support.classpathxmlapplicationcontext;/** *  Test restart *   *  @author  Lenovo * */public class AppMain8 {public static  Void main (String[] args) throws jobexecutionalreadyrunningexception, jobrestartexception,jobinstancealreadycompleteexception, jobparametersinvalidexception { Long starttime = system.currenttimemillis (); //  Get start time @suppresswarnings ("resource") Applicationcontext context = new classpathxmlapplicationcontext (new String[] {   "Classpath:spring-batch-restart.xml"  }); Jobparametersbuilder jobparametersbuilder = new jobparametersbuilder (); job job =  (Job)  context.getbean ("Addpeopledescjob"); joblauncher launcher =  (Joblauncher)  context.getbean ("Joblauncher"); Jobexecution result = launcher.run (Job,jobparametersbuilder.tojobparameters ()); Exitstatus es = result.getexitstatus ();if  (Es.getexitcode (). Equals ( ExitStatus.COMPLETED.getExitCode ()))  {system.out.println ("task completed");}  else {system.out.println ("Task failed, exitcode="  + es.getexitcode ());} Long endtime = system. Currenttimemillis (); //  Get end Time System.out.println ("program run Time: "  +  (endtime -  StartTime)  +  "MS");}}

When I first run successfully:

SELECT * from Batch_job_instance;

job_instance_id VERSION job_name job_key-------------------------------------- --------------------------------1 0 addpeopledescjob d41d8cd98f00b204e9800998ecf8427e

When I run the second time successfully, query the related table:

SELECT * from Batch_job_execution; you will find two job_execution, all of which belong to a job instance.

job_instance_id VERSION job_name job_key-------------------------------------- --------------------------------1 0 addpeopledescjob d41d8cd98f00b204e9800998ecf8427e

job_execution_id job_instance_id create_time--------------------------------------------------1 1 2014-11-14 12:33:12 2 1 2014-11-14 12:33:48

To view step run information:

Select step_execution_id, Step_name, job_execution_id from Batch_step_execution;

step_execution_id step_name job_execution_id--------------------------------------------1 Add Descstep 1 2 adddescstep 2

The corresponding database will also be one more times the data.

When the job is run for the third time, the following exception information is reported:

caused by:org.springframework.batch.core.StartLimitExceededException:Maximum start limit exceeded for step: Adddescstepstartmax:2

It is obvious that the number of reboots is exhausted ...

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Spring batch_configuring a Step for Restart