SlideServe
Télécharger Obtenir Pro
Menu
Accueil Pro
Préférences
ApparenceLight Aide et commentaires
© SlideServe · v2026

Spring-Batch Tutorial

teleri avatar
teleri
24 diapositives · 1.1K Views · Oct 03, 2014

Spring-Batch Tutorial. Guide for Application Developers. Agenda. “Hello world!” job Simple job – programming a Tasklet directly Common job – weaving standard components Sample jobs. “Hello World!” - tasklet. public class HelloWorldTasklet implements Tasklet {

#spring-batch tutorial #spring-batch tutorial ppt #powerpoint #presentation
Spring-Batch Tutorial - slide 1
01 / 24Spring-Batch Tutorial
1 / 17

Télécharger la présentation

Spring-Batch Tutorial
Une image / un lien ci-dessous est fourni (tel quel) pour télécharger la présentation

Politique de téléchargement : le contenu du site vous est fourni TEL QUEL pour votre information et votre usage personnel ; il ne peut être vendu, concédé sous licence ni partagé sur d’autres sites sans l’accord de son auteur.Le contenu vous est fourni TEL QUEL, pour votre information et votre usage personnel uniquement. Téléchargez la présentation en cliquant sur ce lien. Lors du téléchargement, si vous ne parvenez pas à télécharger une présentation, l’éditeur a peut-être supprimé le fichier de son serveur.Pendant le téléchargement, si vous ne parvenez pas à obtenir une présentation, le fichier a peut-être été supprimé par l’éditeur.

F I N

Plus de contenu associé

Transcription de la présentation

  1. Spring-Batch Tutorial Guide for Application Developers

  2. Agenda • “Hello world!” job • Simple job – programming a Tasklet directly • Common job – weaving standard components • Sample jobs

  3. “Hello World!” - tasklet publicclass HelloWorldTasklet implements Tasklet { public ExitStatus execute() throws Exception { System.out.println("Hello world!"); return ExitStatus.FINISHED; } }

  4. “Hello World!” - tasklet publicclass HelloWorldTasklet implements Tasklet { public ExitStatus execute() throws Exception { System.out.println("Hello world!"); return ExitStatus.FINISHED; } }

  5. “Hello World!” - configuration <bean id="jobConfiguration" parent="simpleJob"> <property name="name" value="helloWorldJob" /> <property name="steps"> <list> <bean id="step1" parent="simpleStep"> <constructor-arg> <bean class="...HelloWorldTasklet" /> </constructor-arg> </bean> </list> </property> </bean>

  6. “Hello World!” - configuration <bean id="jobConfiguration" parent="simpleJob"> <property name="name" value="helloWorldJob" /> <property name="steps"> <list> <bean id="step1" parent="simpleStep"> <constructor-arg> <bean class="...HelloWorldTasklet" /> </constructor-arg> </bean> </list> </property> </bean>

  7. Simple job - tasklet publicclass SimpleTasklet implements Tasklet { private InputSource inputSource; private OutputSource outputSource; public ExitStatus execute() throws Exception { Object data = inputSource.read(); if (data != null) { outputSource.write(data); return ExitStatus.CONTINUABLE; } return ExitStatus.FINISHED; } publicvoid setInputSource(InputSource inputSource) { this.inputSource = inputSource; } publicvoid setOutputSource(OutputSource outputSource) { this.outputSource = outputSource; } }

  8. Simple job - tasklet publicclass SimpleTasklet implements Tasklet { private InputSource inputSource; private OutputSource outputSource; public ExitStatus execute() throws Exception { Object data = inputSource.read(); if (data != null) { outputSource.write(data); return ExitStatus.CONTINUABLE; } return ExitStatus.FINISHED; } publicvoid setInputSource(InputSource inputSource) { this.inputSource = inputSource; } publicvoid setOutputSource(OutputSource outputSource) { this.outputSource = outputSource; } }

  9. Simple job - tasklet publicclass SimpleTasklet implements Tasklet { private InputSource inputSource; private OutputSource outputSource; public ExitStatus execute() throws Exception { Object data = inputSource.read(); if (data != null) { outputSource.write(data); return ExitStatus.CONTINUABLE; } return ExitStatus.FINISHED; } publicvoid setInputSource(InputSource inputSource) { this.inputSource = inputSource; } publicvoid setOutputSource(OutputSource outputSource) { this.outputSource = outputSource; } }

  10. Simple job - configuration <bean id="jobConfiguration" parent="simpleJob"> <property name="name" value="simpleTaskletJob" /> <property name="steps"> <list> <bean id="step1" parent="simpleStep"> <constructor-arg> <bean class="...SimpleTasklet"> <property name="inputSource" ref="inputSource" /> <property name="outputSource" ref="outputSource" /> </bean> </constructor-arg> </bean> </list> </property> </bean>

  11. Simple job – input source <bean id=“inputSource"class="...SqlCursorInputSource“ scope="step" > <aop:scoped-proxy /> <property name="dataSource" ref="dataSource" /> <property name="sql" value="SELECT id, quantity, price, customer from TRADE" /> <property name="mapper"> <bean class="...TradeRowMapper" /> </property> </bean>

  12. Simple job – input source <bean id=“inputSource"class="...SqlCursorInputSource“ scope="step" > <aop:scoped-proxy /> <constructor-arg> <ref bean="dataSource" /> </constructor-arg> <property name="sql" value="SELECT id, quantity, price, customer from TRADE" /> <property name="mapper"> <bean class="...TradeRowMapper" /> </property> </bean>

  13. Simple job – output source <bean id="outputSource" class="...FlatFileOutputSource“ scope="step" > <aop:scoped-proxy /> <property name="resource" value="file:out.txt" /> </bean>

  14. Common job - configuration <bean id="jobConfiguration" parent="simpleJob"> <property name="name" value="commonJob" /> <property name="steps"> <bean id="step1" parent="simpleStep"> <constructor-arg> <beanclass="...tasklet.RestartableItemProviderTasklet"> <property name="itemProvider"> <beanclass="...tasklet.support.InputSourceItemProvider"> <property name="source" ref="sqlInputSource" /> </bean> </property> <property name="itemProcessor"> <bean class="...tasklet.support.OutputSourceItemProcessor"> <property name="source" ref="xmlOutputSource" /> </bean> </property> </bean> </constructor-arg> </bean> </property> </bean>

  15. Common job – tasklet <beanclass="...tasklet.RestartableItemProviderTasklet"> <property name="itemProvider"> <beanclass="...tasklet.support.InputSourceItemProvider"> <property name="source" ref="sqlInputSource" /> </bean> </property> <property name="itemProcessor"> <bean class="...tasklet.support.OutputSourceItemProcessor"> <property name="source" ref="xmlOutputSource" /> </bean> </property> </bean>

  16. Common job – tasklet <beanclass="...tasklet.RestartableItemProviderTasklet"> <property name="itemProvider"> <beanclass="...tasklet.support.InputSourceItemProvider"> <property name="source" ref="sqlInputSource" /> </bean> </property> <property name="itemProcessor"> <bean class="...tasklet.support.OutputSourceItemProcessor"> <property name="source" ref="xmlOutputSource" /> </bean> </property> </bean>

  17. Common job – tasklet <beanclass="...tasklet.RestartableItemProviderTasklet"> <property name="itemProvider"> <beanclass="...tasklet.support.InputSourceItemProvider"> <property name="source" ref="sqlInputSource" /> </bean> </property> <property name="itemProcessor"> <bean class="...tasklet.support.OutputSourceItemProcessor"> <property name="source" ref="xmlOutputSource" /> </bean> </property> </bean>

  18. Samples overview • Samples project contains simple batch jobs illustrating various capabilities of the Spring-Batch framework • See the folder src/main/resources/jobs for job configuration files • See src/test/java, package org.springframework.batch.sample for tests which launch the jobs and check the expected results

  19. simpleTaskletJob.xml • Straightforwardly implemented Tasklet, similar to the “Simple Job” example • All-in-one solution to help understand tasklet’s execution logic • Standard solutions are more modular, which makes them more flexible and reusable, but also less straightforward to understand

  20. fixedLengthImportJob.xml • Clean separation of reading input and processing data (standard from now on) • Typical scenario of importing data from a fixed-length file to database • Custom DAO used for output

  21. multilineOrderJob.xml • Handling of complex file format, both reading input and writing output • Single record spans multiple lines and has nested records • Custom ItemProvider and ItemProcessor implementations handling non-standard file format

  22. tradeJob.xml • shows a reasonably complex scenario, that would resemble the real-life usage of the framework • 3 steps: • trade records are imported from file to database • customer account balance is adjusted • report about customers is exported to a file

  23. compositeProcessorSample.xml • Parallel writing to multiple outputs • Example usage of composite ItemProcessor with an injected list of ItemProcessors

  24. restartSample.xml • Simulates restart scenario, where the job crashes on first run and succeeds after being restarted • Uses ‘hacked’ tasklet that throws exception after reading a given number of records