io.awspring.cloud.jdbc.datasource

Class ReadOnlyRoutingDataSource

java.lang.Object

org.springframework.jdbc.datasource.AbstractDataSource

org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource

io.awspring.cloud.jdbc.datasource.ReadOnlyRoutingDataSource

All Implemented Interfaces:

Wrapper, CommonDataSource, DataSource, InitializingBean

public class ReadOnlyRoutingDataSource
extends AbstractRoutingDataSource

AbstractRoutingDataSource implementation that routes to different read only data source in a random fashion if the current transaction is read-only. This is useful for database platforms that support read-replicas (like MySQL) to scale up the access to the database for read-only accesses.

Note: In order to use read-only replicas it is necessary to wrap this data source with a LazyConnectionDataSourceProxy to ensure that the connection is not fetched during transaction creation, but during the first physical access. See the LazyConnectionDataSourceProxy documentation for more details.

Author:

Agim Emruli

See Also:

LazyConnectionDataSourceProxy

Field Summary

Fields inherited from class org.springframework.jdbc.datasource.AbstractDataSource

logger

Constructor Summary

Constructors

Constructor and Description
ReadOnlyRoutingDataSource()

Method Summary

Modifier and Type	Method and Description
protected Object	determineCurrentLookupKey()
List<Object>	getDataSources()
void	setDefaultTargetDataSource(Object defaultTargetDataSource)
void	setTargetDataSources(Map<Object,Object> targetDataSources)

Methods inherited from class org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource

afterPropertiesSet, determineTargetDataSource, getConnection, getConnection, getResolvedDataSources, getResolvedDefaultDataSource, isWrapperFor, resolveSpecifiedDataSource, resolveSpecifiedLookupKey, setDataSourceLookup, setLenientFallback, unwrap

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

getLoginTimeout, getLogWriter, getParentLogger, setLoginTimeout, setLogWriter

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadOnlyRoutingDataSource

public ReadOnlyRoutingDataSource()

Method Detail

setTargetDataSources

public void setTargetDataSources(Map<Object,Object> targetDataSources)

Overrides:

setTargetDataSources in class AbstractRoutingDataSource

setDefaultTargetDataSource

public void setDefaultTargetDataSource(Object defaultTargetDataSource)

Overrides:

setDefaultTargetDataSource in class AbstractRoutingDataSource

determineCurrentLookupKey

protected Object determineCurrentLookupKey()

Specified by:

determineCurrentLookupKey in class AbstractRoutingDataSource

getDataSources

public List<Object> getDataSources()