org.janusgraph.diskstorage.keycolumnvalue.cache

Class ExpirationKCVSCache

java.lang.Object

org.janusgraph.diskstorage.keycolumnvalue.KCVSProxy

org.janusgraph.diskstorage.keycolumnvalue.cache.KCVSCache

org.janusgraph.diskstorage.keycolumnvalue.cache.ExpirationKCVSCache

All Implemented Interfaces:

KeyColumnValueStore

public class ExpirationKCVSCache
extends KCVSCache

Author:

Matthias Broecheler ([email protected])

Field Summary

Fields inherited from class org.janusgraph.diskstorage.keycolumnvalue.cache.KCVSCache

NO_DELETIONS

Fields inherited from class org.janusgraph.diskstorage.keycolumnvalue.KCVSProxy

store

Fields inherited from interface org.janusgraph.diskstorage.keycolumnvalue.KeyColumnValueStore

NO_ADDITIONS

Constructor Summary

Constructors

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

Method Summary

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 org.janusgraph.diskstorage.keycolumnvalue.cache.KCVSCache

getSliceNoCache, getSliceNoCache, hasValidateKeysOnly, incActionBy, mutate, mutateEntries, unwrapTx

Methods inherited from class org.janusgraph.diskstorage.keycolumnvalue.KCVSProxy

acquireLock, getKeys, getKeys, getName

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 BackendException

Description copied from interface: KeyColumnValueStore

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

Specified by:

getSlice in interface KeyColumnValueStore

Overrides:

getSlice in class KCVSProxy

Parameters:

query - Query to get results for

txh - Transaction

Returns:

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

Throws:

BackendException - when columnEnd < columnStart

See Also:

KeySliceQuery

getSlice

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

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.

Specified by:

getSlice in interface KeyColumnValueStore

Overrides:

getSlice in class KCVSProxy

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:

BackendException

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 BackendException

Description copied from interface: KeyColumnValueStore

Closes this store

Specified by:

close in interface KeyColumnValueStore

Overrides:

close in class KCVSProxy

Throws:

BackendException