Question

使用Spring Batch 2.1.9时遇到问题：当我使用 jobExplorer.getJobExecution（jobExecutionId）时，我发现DAO必须反序列化字符串时出现问题：

{"map":[{"entry":{"string":"parsedComparingDate","date":"2014-03-08 23:00:00.0 UTC"}}]}

使用方法JdbcJobExecutionDao.getJobExecution()从 BATCH_JOB_EXECUTION_CONTEXT 表

。

我知道春季批次使用xstream 1.3，但在我的Pom中，我有：

春季批次2.1.9 ;
xstream 1.4.1 （继承自smooks）;
jettison 1.3.3 （继承自cxf）;

另外，我读到xstream 1.3在使用jettison 1.3.3时不能正常工作，但使用xstream 1.3（不包括pom的xstream 1.4.1）工作正常，而使用xstream 1.4.1或major，我发现以下例外：

Caused by: java.lang.InstantiationError: java.util.Map$Entry
        at sun.reflect.GeneratedSerializationConstructorAccessor1.newInstance(Unknown Source) [:1.6.0_23]
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513) [rt.jar:1.6.0_23]
        at com.thoughtworks.xstream.converters.reflection.Sun14ReflectionProvider.newInstance(Sun14ReflectionProvider.java:75) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.instantiateNewInstance(AbstractReflectionConverter.java:424) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:229) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:71) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.converters.collections.MapConverter.putCurrentEntryIntoMap(MapConverter.java:85) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.converters.collections.MapConverter.populateMap(MapConverter.java:77) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.converters.collections.MapConverter.populateMap(MapConverter.java:71) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.converters.collections.MapConverter.unmarshal(MapConverter.java:66) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1035) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1019) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.XStream.fromXML(XStream.java:895) [xstream-1.4.1.jar:]
        at com.thoughtworks.xstream.XStream.fromXML(XStream.java:886) [xstream-1.4.1.jar:]
        at org.springframework.batch.core.repository.dao.XStreamExecutionContextStringSerializer.deserialize(XStreamExecutionContextStringSerializer.java:48) [spring-batch-core-2.1.9.RELEASE.jar:]
        at org.springframework.batch.core.repository.dao.JdbcExecutionContextDao$ExecutionContextRowMapper.mapRow(JdbcExecutionContextDao.java:222) [spring-batch-core-2.1.9.RELEASE.jar:]
        at org.springframework.batch.core.repository.dao.JdbcExecutionContextDao$ExecutionContextRowMapper.mapRow(JdbcExecutionContextDao.java:215) [spring-batch-core-2.1.9.RELEASE.jar:]
        at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:92) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:60) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:649) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:587) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:637) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:666) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:674) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:714) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.simple.SimpleJdbcTemplate.query(SimpleJdbcTemplate.java:202) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.jdbc.core.simple.SimpleJdbcTemplate.query(SimpleJdbcTemplate.java:209) [org.springframework.jdbc-3.2.1.RELEASE.jar:3.2.1.RELEASE]
        at org.springframework.batch.core.repository.dao.JdbcExecutionContextDao.getExecutionContext(JdbcExecutionContextDao.java:106) [spring-batch-core-2.1.9.RELEASE.jar:]

1）我已经看过代码，我可以配置 XStreamExecutionContextStringSerializer 以设置 reflectionProvider = null （这样，它不会使用Provider）？

2）还有其他解决方案可以解决我的问题吗？

感谢

Answer 1

我不可能更改xstream版本和jettison版本，因为它们是由其他组件（如smooks）导入的。

一种可能的解决方案可能是创建两个不同的 JBoss模块并使用它们来实现。

所以，我找到另一个解决方案：使用 spring-batch 2.2.0.RELEASE ，并使用org.springframework.batch.core.repository.dao.DefaultExecutionContextSerializer作为序列化程序而不是 XStream 。

配置下方：

<bean id="batchDefaultSerializer" class="org.springframework.batch.core.repository.dao.DefaultExecutionContextSerializer" />

<bean id="jobRepository" class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="transactionManager" ref="batchTransactionManager" />
    <property name="lobHandler" ref="defaultLobHandler" />
    <property name="serializer" ref="batchDefaultSerializer" />
</bean>       

<bean id="jobExplorer"      
      class="org.springframework.batch.core.explore.support.JobExplorerFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="serializer" ref="batchDefaultSerializer" />
</bean>

我测试了它并且工作正常，所以，我认为这是最好的解决方案。

Answer 2

由于Jettison 1.2+与XStream不兼容，升级XStream会导致Spring Batch中断。这是最近确定的但尚未解决的问题。您的问题的解决方案是使用Jettison 1.2和XStream 1.4.7

Answer 3

我正在使用带有Spring Batch 3.0.7的Spring Boot 1.4.0，并使用一个使用Netflix OSS组件的微服务遇到了这个问题b / c他们使用的是XStreams 1.4.2。

我也使用Java配置而不是XML。以下是我提出的解决问题的方法：在@Configuration类中：

   @Bean
   public ExecutionContextSerializer serializer()
   {
      return new Jackson2ExecutionContextStringSerializer();
   }

   @Bean
   @Autowired
   public JobRepository jobRepository( DataSource dataSource, 
                                       PlatformTransactionManager txManager ) throws Exception
   {
        JobRepositoryFactoryBean fac = new JobRepositoryFactoryBean();
        fac.setDataSource( dataSource );
        fac.setTransactionManager( txManager );
        fac.setSerializer( serializer() );
        fac.afterPropertiesSet();
        return fac.getObject();
   }

   @Bean
   @Autowired
   public JobExplorer jobExplorer( DataSource dataSource ) throws Exception
   {
      JobExplorerFactoryBean fac = new JobExplorerFactoryBean();
      fac.setDataSource( dataSource );
      fac.setSerializer( serializer() );
      fac.afterPropertiesSet();
      return fac.getObject();
   }

我正在使用Postgres作为后备存储，因此DefaultExecutionContextSerializer无法正常工作，因为它尝试序列化二进制而不是UTF-8（JSON）。

Spring Batch，JdbcExecutionContextDao java.util.Map $ Entry deserializer issue，xstream 1.4.1

3 个答案: