Spring batch和Spring Boot中的数据源问题

Question

我正在开发一个与spring Batch集成的Spring Boot应用程序。当我使用具有以下数据源属性的独立Spring Boot应用程序时，它工作得很好。但是当我将spring批处理集成到应用程序时，它会产生错误。

spring:
  datasource:
    url: jdbc:oracle:thin:@//localhost:1521:orcl
    username: test
    password: Abcd

@Primary 
@Configuration
@ConfigurationProperties(prefix = "spring.datasource")
public class OracleConfiguration {

    @NotNull
    private String username;

    @NotNull
    private String password;

    @NotNull
    private String url;

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setUrl(String url) {
        this.url = url;
    }


    @Bean
    public DataSource dataSource() throws SQLException {

        OracleDataSource dataSource = new OracleDataSource();
        dataSource.setUser(username);
        dataSource.setPassword(password);
        dataSource.setURL(url);
        dataSource.setImplicitCachingEnabled(true);
        dataSource.setFastConnectionFailoverEnabled(true);
        return dataSource;
    } 

@Repository
public class DbServiceImpl extends JdbcDaoSupport{

    @Autowired
    DataSource dataSource;


    @PostConstruct
    private void initialize() throws SQLException{
        setDataSource(dataSource);


    public String getCode(String name, String code)
    {
        String sql = "";

        String baseCode = getJdbcTemplate().queryForObject(sql, new Object[] { name, code },String.class);
        return baseCode;

    }

@Bean
public Job myJob() throws Exception {

    Job job =jobBuilderFactory.get("MyJob").start(moveToQueryStep()).build();
    return job;
}

我试图通过作业配置中的moveToQueryStep（）调用DbServiceImpl中的getCode（）。我可以在dbserviceimpl.java“initialize”方法中设置数据源，但当spring批处理尝试执行tasklet步骤时，它会抛出以下错误。我试过很多种解决办法，但都不奏效。请帮忙

java.lang.IllegalStateException：在org.springframework.boot.springapplication.callrunner（springapplication.java:803)[spring-boot-2.0.4.release.jar:2.0.4.release]在org.springframework.boot.springapplication.callrunners（springapplication.java:784)[spring-boot-2.0.4.release.jar:2.0.4.release]在错误的SQL语法[从BATCH_JOB_INSTANCE中选择JOB_INSTANCE_ID,JOB_NAME，其中JOB_NAME=？order by JOB_INSTANCE_ID desc]；嵌套异常为java.sql.SqlSyntaxerRoreXception：ORA-00942:表或视图不存在

at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:234) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.translateException(JdbcTemplate.java:1402) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:620) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:657) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:688) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:700) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.batch.core.repository.dao.JdbcJobInstanceDao.getJobInstances(JdbcJobInstanceDao.java:230) ~[spring-batch-core-4.0.1.RELEASE.jar:4.0.1.RELEASE]
at org.springframework.batch.core.explore.support.SimpleJobExplorer.getJobInstances(SimpleJobExplorer.java:173) ~[spring-batch-core-4.0.1.RELEASE.jar:4.0.1.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_172]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_172]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_172]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_172]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:197) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) ~[spring-batch-core-4.0.1.RELEASE.jar:4.0.1.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at com.sun.proxy.$Proxy51.getJobInstances(Unknown Source) ~[na:na]
at org.springframework.batch.core.JobParametersBuilder.getNextJobParameters(JobParametersBuilder.java:254) ~[spring-batch-core-4.0.1.RELEASE.jar:4.0.1.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.execute(JobLauncherCommandLineRunner.java:162) ~[spring-boot-autoconfigure-2.0.4.RELEASE.jar:2.0.4.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.executeLocalJobs(JobLauncherCommandLineRunner.java:179) ~[spring-boot-autoconfigure-2.0.4.RELEASE.jar:2.0.4.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.launchJobFromProperties(JobLauncherCommandLineRunner.java:134) ~[spring-boot-autoconfigure-2.0.4.RELEASE.jar:2.0.4.RELEASE]
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.run(JobLauncherCommandLineRunner.java:128) ~[spring-boot-autoconfigure-2.0.4.RELEASE.jar:2.0.4.RELEASE]
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:800) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
... 5 common frames omitted

原因：java.sql.SqlSyntaxerRorexception：ORA-00942:表或视图不存在

at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1059) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:522) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:257) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:587) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:225) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:53) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:774) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:925) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1111) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:4798) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:4845) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1501) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:666) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:605) ~[spring-jdbc-5.0.8.RELEASE.jar:5.0.8.RELEASE]

编辑2：

我可以通过下面的解决方案来解决这个问题

除了提供一个空的数据源，还有更好的方法吗？

Answer 1

您需要为Oracle运行spring批处理SQL初始化脚本。它预先打包了SQL初始化脚本，用于大多数流行的数据库平台。Spring Boot可以检测数据库类型并在启动时执行这些脚本。如果使用嵌入式数据库，默认情况下会发生这种情况。但是在使用Oracle时,需要在application.properties文件中添加以下内容：

spring.batch.initialize-schema=always

这是用于application.properties文件的。您需要将其转换为application.yml的正确格式