Package com.github.seregamorph.testsmartcontext.jdbc

Class LateInitDataSource

java.lang.Object

org.springframework.jdbc.datasource.DelegatingDataSource

com.github.seregamorph.testsmartcontext.jdbc.CloseableDelegatingDataSource

com.github.seregamorph.testsmartcontext.jdbc.LateInitDataSource

All Implemented Interfaces:

Closeable, AutoCloseable, Wrapper, CommonDataSource, DataSource, org.springframework.beans.factory.InitializingBean

public class LateInitDataSource
extends CloseableDelegatingDataSource

DataSource decorator which resolves delegate DataSource on first demand.

This can be an optimization for DataSources created beyond TestContainers-managed Docker containers: the container is only started if needed.

Usage example:

     @Bean
     public DataSource dataSource(PostgreSQLContainer<?> container) {
         // lazy late initialization - the JDBC url is not known yet, because container is not running
         return new LateInitDataSource(() -> {
             LOGGER.info("Late initialization data source docker container {}", container);
             // start only on demand
             container.start();
             return createHikariDataSourceForContainer(container);
         });
     }
 

This DataSource delegates close call to the target.

Author:

Sergey Chernov

Constructor Summary

Constructors

Constructor	Description
LateInitDataSource(String name, Supplier<DataSource> dataSourceSupplier)
LateInitDataSource(Supplier<DataSource> dataSourceSupplier)

Method Summary

Modifier and Type	Method	Description
void	afterPropertiesSet()
protected DataSource	obtainTargetDataSource()
String	toString()

Methods inherited from class com.github.seregamorph.testsmartcontext.jdbc.CloseableDelegatingDataSource

close

Methods inherited from class org.springframework.jdbc.datasource.DelegatingDataSource

createConnectionBuilder, createShardingKeyBuilder, getConnection, getConnection, getLoginTimeout, getLogWriter, getParentLogger, getTargetDataSource, isWrapperFor, setLoginTimeout, setLogWriter, setTargetDataSource, unwrap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

LateInitDataSource

public LateInitDataSource(Supplier<DataSource> dataSourceSupplier)

LateInitDataSource

public LateInitDataSource(String name,
 Supplier<DataSource> dataSourceSupplier)

Method Details

afterPropertiesSet

public void afterPropertiesSet()

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Overrides:

afterPropertiesSet in class org.springframework.jdbc.datasource.DelegatingDataSource

obtainTargetDataSource

protected DataSource obtainTargetDataSource()

Overrides:

obtainTargetDataSource in class org.springframework.jdbc.datasource.DelegatingDataSource

toString

public String toString()

Overrides:

toString in class Object