Package org.apache.drill.exec.store.sys.store.provider

Class CachingPersistentStoreProvider

java.lang.Object

org.apache.drill.exec.store.sys.store.provider.BasePersistentStoreProvider

org.apache.drill.exec.store.sys.store.provider.CachingPersistentStoreProvider

All Implemented Interfaces:

AutoCloseable, PersistentStoreProvider

public class CachingPersistentStoreProvider
extends BasePersistentStoreProvider

Constructor Summary

Constructors

Constructor	Description
CachingPersistentStoreProvider(PersistentStoreProvider provider)

Method Summary

Modifier and Type	Method	Description
void	close()
<V> PersistentStore<V>	getOrCreateStore(PersistentStoreConfig<V> config)	Gets or creates a persistent store for the given configuration.
<V> VersionedPersistentStore<V>	getOrCreateVersionedStore(PersistentStoreConfig<V> config)	Override this method if store supports versioning and return versioning instance.
void	start()	Sets up the provider.

Methods inherited from class java.lang.Object

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

Constructor Details

CachingPersistentStoreProvider

public CachingPersistentStoreProvider(PersistentStoreProvider provider)

Method Details

getOrCreateStore

public <V> PersistentStore<V> getOrCreateStore(PersistentStoreConfig<V> config)
                                        throws StoreException

Description copied from interface: PersistentStoreProvider

Gets or creates a persistent store for the given configuration. Note that implementors have liberty to cache previous store instances.

Type Parameters:

V - store value type

Parameters:

config - store configuration

Returns:

persistent store instance

Throws:

StoreException - in case when unable to create store

getOrCreateVersionedStore

public <V> VersionedPersistentStore<V> getOrCreateVersionedStore(PersistentStoreConfig<V> config)
                                                          throws StoreException

Description copied from interface: PersistentStoreProvider

Override this method if store supports versioning and return versioning instance. By default, undefined version wrapper will be used.

Type Parameters:

V - store value type

Parameters:

config - store configuration

Returns:

versioned persistent store instance

Throws:

StoreException - in case when unable to create store

start

public void start()
           throws Exception

Description copied from interface: PersistentStoreProvider

Sets up the provider.

Specified by:

start in interface PersistentStoreProvider

Overrides:

start in class BasePersistentStoreProvider

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Overrides:

close in class BasePersistentStoreProvider

Throws:

Exception