voldemort.store.stats
Class StatTrackingStore

java.lang.Object
  voldemort.store.DelegatingStore<ByteArray,byte[],byte[]>
      voldemort.store.stats.StatTrackingStore

All Implemented Interfaces:

Store<ByteArray,byte[],byte[]>

public class StatTrackingStore
extends DelegatingStore<ByteArray,byte[],byte[]>

A store wrapper that tracks basic usage statistics

Constructor Summary

StatTrackingStore(Store<ByteArray,byte[],byte[]> innerStore, StoreStats parentStats)

Method Summary

boolean	delete(ByteArray key, Version version) Delete all entries prior to the given version
java.util.List<Versioned<byte[]>>	get(ByteArray key, byte[] transforms) Get the value associated with the given key
java.util.Map<ByteArray,java.util.List<Versioned<byte[]>>>	getAll(java.lang.Iterable<ByteArray> keys, java.util.Map<ByteArray,byte[]> transforms) Get the values associated with the given keys and returns them in a Map of keys to a list of versioned values.
java.lang.Object	getCapability(StoreCapabilityType capability) Get some capability of the store.
StoreStats	getStats()
void	put(ByteArray key, Versioned<byte[]> value, byte[] transforms) Associate the value with the key and version in this store
void	resetStatistics()

Methods inherited from class voldemort.store.DelegatingStore

close, getInnerStore, getName, getVersions, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

StatTrackingStore

public StatTrackingStore(Store<ByteArray,byte[],byte[]> innerStore,
                         StoreStats parentStats)

Method Detail

delete

public boolean delete(ByteArray key,
                      Version version)
               throws VoldemortException

Description copied from interface: Store

Delete all entries prior to the given version

Specified by:

delete in interface Store<ByteArray,byte[],byte[]>

Overrides:

delete in class DelegatingStore<ByteArray,byte[],byte[]>

Parameters:

key - The key to delete

version - The current value of the key

Returns:

True if anything was deleted

Throws:

VoldemortException

get

public java.util.List<Versioned<byte[]>> get(ByteArray key,
                                             byte[] transforms)
                                      throws VoldemortException

Description copied from interface: Store

Get the value associated with the given key

Specified by:

get in interface Store<ByteArray,byte[],byte[]>

Overrides:

get in class DelegatingStore<ByteArray,byte[],byte[]>

Parameters:

key - The key to check for

Returns:

The value associated with the key or an empty list if no values are found.

Throws:

VoldemortException

getAll

public java.util.Map<ByteArray,java.util.List<Versioned<byte[]>>> getAll(java.lang.Iterable<ByteArray> keys,
                                                                         java.util.Map<ByteArray,byte[]> transforms)
                                                                  throws VoldemortException

Description copied from interface: Store

Get the values associated with the given keys and returns them in a Map of keys to a list of versioned values. Note that the returned map will only contain entries for the keys which have a value associated with them.

Specified by:

getAll in interface Store<ByteArray,byte[],byte[]>

Overrides:

getAll in class DelegatingStore<ByteArray,byte[],byte[]>

Parameters:

keys - The keys to check for.

Returns:

A Map of keys to a list of versioned values.

Throws:

VoldemortException

put

public void put(ByteArray key,
                Versioned<byte[]> value,
                byte[] transforms)
         throws VoldemortException

Description copied from interface: Store

Associate the value with the key and version in this store

Specified by:

put in interface Store<ByteArray,byte[],byte[]>

Overrides:

put in class DelegatingStore<ByteArray,byte[],byte[]>

Parameters:

key - The key to use

value - The value to store and its version.

Throws:

VoldemortException

getCapability

public java.lang.Object getCapability(StoreCapabilityType capability)

Description copied from interface: Store

Get some capability of the store. Examples would be the serializer used, or the routing strategy. This provides a mechanism to verify that the store hierarchy has some set of capabilities without knowing the precise layering.

Specified by:

getCapability in interface Store<ByteArray,byte[],byte[]>

Overrides:

getCapability in class DelegatingStore<ByteArray,byte[],byte[]>

Parameters:

capability - The capability type to retrieve

Returns:

The given capaiblity

getStats

public StoreStats getStats()

resetStatistics

public void resetStatistics()