com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache

Class ExpirationKCVSCache

java.lang.Object

com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.KCVSCache

com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.ExpirationKCVSCache

All Implemented Interfaces:

KeyColumnValueStore

public class ExpirationKCVSCache
extends KCVSCache

Author:

Matthias Broecheler (me@matthiasb.com)

Field Summary

Fields inherited from class com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.KCVSCache

NO_DELETIONS, store

Fields inherited from interface com.thinkaurelius.titan.diskstorage.keycolumnvalue.KeyColumnValueStore

NO_ADDITIONS

Constructor Summary

Constructors

Constructor and Description
ExpirationKCVSCache(KeyColumnValueStore store, String metricsName, long cacheTimeMS, long invalidationGracePeriodMS, long maximumByteSize)

Method Summary

Methods

Modifier and Type	Method and Description
void	clearCache()
void	close() Closes this store
EntryList	getSlice(KeySliceQuery query, StoreTransaction txh) Retrieves the list of entries (i.e.
Map<StaticBuffer,EntryList>	getSlice(List<StaticBuffer> keys, SliceQuery query, StoreTransaction txh) Retrieves the list of entries (i.e.
void	invalidate(StaticBuffer key, List<CachableStaticBuffer> entries)

Methods inherited from class com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.KCVSCache

acquireLock, getKeys, getKeys, getName, getTx, hasValidateKeysOnly, incActionBy, mutate, mutateEntries

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpirationKCVSCache

public ExpirationKCVSCache(KeyColumnValueStore store,
                   String metricsName,
                   long cacheTimeMS,
                   long invalidationGracePeriodMS,
                   long maximumByteSize)

Method Detail

getSlice

public EntryList getSlice(KeySliceQuery query,
                 StoreTransaction txh)
                   throws StorageException

Description copied from interface: KeyColumnValueStore

Retrieves the list of entries (i.e. column-value pairs) for a specified query.

Parameters:

query - Query to get results for

txh - Transaction

Returns:

List of entries up to a maximum of "limit" entries

Throws:

StorageException - when columnEnd < columnStart

See Also:

KeySliceQuery

getSlice

public Map<StaticBuffer,EntryList> getSlice(List<StaticBuffer> keys,
                                   SliceQuery query,
                                   StoreTransaction txh)
                                     throws StorageException

Description copied from interface: KeyColumnValueStore

Retrieves the list of entries (i.e. column-value pairs) as specified by the given SliceQuery for all of the given keys together.

Parameters:

keys - List of keys

query - Slicequery specifying matching entries

txh - Transaction

Returns:

The result of the query for each of the given keys as a map from the key to the list of result entries.

Throws:

StorageException

clearCache

public void clearCache()

Specified by:

clearCache in class KCVSCache

invalidate

public void invalidate(StaticBuffer key,
              List<CachableStaticBuffer> entries)

Specified by:

invalidate in class KCVSCache

close

public void close()
           throws StorageException

Description copied from interface: KeyColumnValueStore

Closes this store

Specified by:

close in interface KeyColumnValueStore

Overrides:

close in class KCVSCache

Throws:

StorageException