SpringBatch数据源配置 - 异常处理

Question

我有一个SpringBatch项目，我希望在应用程序找不到数据源时捕获异常。我已经通过了这个，所以它将使用'在内存DAO对象'而不是表..但它仍然会在找不到数据源时引发异常。
我想捕获该异常并抛出我自己的错误代码，但我不知道必须放置try / catch块。

以下是错误日志的一部分：

2016-11-24 09:25:36.171  INFO 36770 --- [main] c.d.d.e.config.ReaderConfiguration : Configuring FlatFileItemReader for [MAP]
2016-11-24 09:25:51.664 ERROR 36770 --- [main] o.a.tomcat.jdbc.pool.ConnectionPool : Unable to create initial connections of pool.

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host [***], port 1433 has failed. Error: "null. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
    at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:190) ~[sqljdbc4.jar:na]

这被覆盖以绕过表创建。另外，我使用了两个数据源，无论如何这个类都必须在这里。

@Component
public class MyBatchConfigurer extends DefaultBatchConfigurer {
    //Spring batch needs this in order to allow to use more than one datasource

    @Override
    public JobRepository createJobRepository() throws Exception {
        return new MapJobRepositoryFactoryBean().getObject();
    }
}

需要注意的是，我甚至尝试将try / catch放在“main”方法上..它仍然抛出上面的异常..然后到达catch内的断点。 此外，我尝试手动创建数据源..但无济于事。更重要的是，ApplicationEvent似乎也不起作用。

这是一个找到数据源的日志：

2016-10-25 16:05:13 [main] INFO  c.d.d.e.config.CompanyConfiguration - Configure FlatFileItemReader for [IW]
2016-10-25 16:05:13 [main] INFO  o.s.jdbc.datasource.init.ScriptUtils - Executing SQL script from class path resource [org/springframework/batch/core/schema-sqlserver.sql]
2016-10-25 16:05:13 [main] INFO  o.s.jdbc.datasource.init.ScriptUtils - Executed SQL script from class path resource [org/springframework/batch/core/schema-sqlserver.sql] in 49 ms.
2016-10-25 16:05:13 [main] INFO  o.s.b.f.config.PropertiesFactoryBean - Loading properties file from URL [jar:file:/home/etl/d-d/d-e-1.0.4-SNAPSHOT.jar!/lib/spring-integration-core-4.2.5.RELEASE.jar!/META-INF/spring.integration.default.properties]