voldemort.store.bdb
Class BdbStorageEngine

java.lang.Object
  voldemort.store.bdb.BdbStorageEngine

All Implemented Interfaces:

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

public class BdbStorageEngine
extends java.lang.Object
implements StorageEngine<ByteArray,byte[],byte[]>

A store that uses BDB for persistence

Constructor Summary

BdbStorageEngine(java.lang.String name, com.sleepycat.je.Environment environment, com.sleepycat.je.Database database, com.sleepycat.je.LockMode readLockMode)

BdbStorageEngine(java.lang.String name, com.sleepycat.je.Environment environment, com.sleepycat.je.Database database, com.sleepycat.je.LockMode readLockMode, boolean cursorPreload)

Method Summary

void	close() Close the store.
boolean	delete(ByteArray key, Version version) Delete all entries prior to the given version
ClosableIterator<Pair<ByteArray,Versioned<byte[]>>>	entries() Get an iterator over pairs of entries in the store.
boolean	equals(java.lang.Object o)
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.String	getBdbStats()
java.lang.Object	getCapability(StoreCapabilityType capability) Get some capability of the store.
java.lang.String	getName()
com.sleepycat.je.DatabaseStats	getStats(boolean setFast)
java.util.List<Version>	getVersions(ByteArray key)
int	hashCode()
boolean	isPartitionAware() Is the data persistence aware of partitions? In other words is the data internally stored on a per partition basis or together
ClosableIterator<ByteArray>	keys() Get an iterator over keys in the store.
void	put(ByteArray key, Versioned<byte[]> value, byte[] transforms) Associate the value with the key and version in this store
void	truncate() Truncate all entries in the store

Methods inherited from class java.lang.Object

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

Constructor Detail

BdbStorageEngine

public BdbStorageEngine(java.lang.String name,
                        com.sleepycat.je.Environment environment,
                        com.sleepycat.je.Database database,
                        com.sleepycat.je.LockMode readLockMode)

BdbStorageEngine

public BdbStorageEngine(java.lang.String name,
                        com.sleepycat.je.Environment environment,
                        com.sleepycat.je.Database database,
                        com.sleepycat.je.LockMode readLockMode,
                        boolean cursorPreload)

Method Detail

getName

public java.lang.String getName()

Specified by:

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

Returns:

The name of the store.

entries

public ClosableIterator<Pair<ByteArray,Versioned<byte[]>>> entries()

Description copied from interface: StorageEngine

Get an iterator over pairs of entries in the store. The key is the first element in the pair and the versioned value is the second element. Note that the iterator need not be threadsafe, and that it must be manually closed after use.

Specified by:

entries in interface StorageEngine<ByteArray,byte[],byte[]>

Returns:

An iterator over the entries in this StorageEngine.

keys

public ClosableIterator<ByteArray> keys()

Description copied from interface: StorageEngine

Get an iterator over keys in the store. Note that the iterator need not be threadsafe, and that it must be manually closed after use.

Specified by:

keys in interface StorageEngine<ByteArray,byte[],byte[]>

Returns:

An iterator over the keys in this StorageEngine.

truncate

public void truncate()

Description copied from interface: StorageEngine

Truncate all entries in the store

Specified by:

truncate in interface StorageEngine<ByteArray,byte[],byte[]>

getVersions

public java.util.List<Version> getVersions(ByteArray key)

Specified by:

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

get

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

Description copied from interface: Store

Get the value associated with the given key

Specified by:

get in interface Store<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:

PersistenceFailureException

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[]>

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 PersistenceFailureException

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[]>

Parameters:

key - The key to use

value - The value to store and its version.

Throws:

PersistenceFailureException

delete

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

Description copied from interface: Store

Delete all entries prior to the given version

Specified by:

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

Parameters:

key - The key to delete

version - The current value of the key

Returns:

True if anything was deleted

Throws:

PersistenceFailureException

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[]>

Parameters:

capability - The capability type to retrieve

Returns:

The given capaiblity

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

close

public void close()
           throws PersistenceFailureException

Description copied from interface: Store

Close the store.

Specified by:

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

Throws:

PersistenceFailureException

getStats

public com.sleepycat.je.DatabaseStats getStats(boolean setFast)

getBdbStats

public java.lang.String getBdbStats()

isPartitionAware

public boolean isPartitionAware()

Description copied from interface: StorageEngine

Is the data persistence aware of partitions? In other words is the data internally stored on a per partition basis or together

Specified by:

isPartitionAware in interface StorageEngine<ByteArray,byte[],byte[]>

Returns:

Boolean indicating if the data persistence is partition aware