voldemort.store.mysql
Class MysqlStorageEngine

java.lang.Object
  extended by voldemort.store.AbstractStore<K,V,T>
      extended by voldemort.store.AbstractStorageEngine<ByteArray,byte[],byte[]>
          extended by voldemort.store.mysql.MysqlStorageEngine
All Implemented Interfaces:
StorageEngine<ByteArray,byte[],byte[]>, Store<ByteArray,byte[],byte[]>

public class MysqlStorageEngine
extends AbstractStorageEngine<ByteArray,byte[],byte[]>

A StorageEngine that uses Mysql for persistence


Constructor Summary
MysqlStorageEngine(java.lang.String name, javax.sql.DataSource datasource)
           
 
Method Summary
 void close()
          Close the store.
 void create()
           
 boolean delete(ByteArray key, Version maxVersion)
          Delete all entries prior to the given version
 void destroy()
           
 ClosableIterator<Pair<ByteArray,Versioned<byte[]>>> entries()
          Get an iterator over pairs of entries in the store.
 ClosableIterator<Pair<ByteArray,Versioned<byte[]>>> entries(int partition)
          Get an iterator over pairs of entries in a store's partition.
 void execute(java.lang.String query)
           
 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.util.List<Version> getVersions(ByteArray key)
          Get the versions associated with the given key.
 ClosableIterator<ByteArray> keys()
          Get an iterator over keys in the store.
 ClosableIterator<ByteArray> keys(int partition)
          Get an iterator over keys in the store's partition Note that the iterator need not be threadsafe, and that it must be manually closed after use.
 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 voldemort.store.AbstractStorageEngine
beginBatchModifications, endBatchModifications, isPartitionAware, isPartitionScanSupported, multiVersionPut, resolveAndConstructVersionsToPersist
 
Methods inherited from class voldemort.store.AbstractStore
delete, get, getAll, getCapability, getName, put
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface voldemort.store.Store
delete, get, getAll, getCapability, getName, put
 

Constructor Detail

MysqlStorageEngine

public MysqlStorageEngine(java.lang.String name,
                          javax.sql.DataSource datasource)
Method Detail

destroy

public void destroy()

create

public void create()

execute

public void execute(java.lang.String query)

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[]>
Overrides:
keys in class AbstractStorageEngine<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[]>
Overrides:
truncate in class AbstractStorageEngine<ByteArray,byte[],byte[]>

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[]>
Overrides:
entries in class AbstractStorageEngine<ByteArray,byte[],byte[]>
Returns:
An iterator over the entries in this StorageEngine.

entries

public ClosableIterator<Pair<ByteArray,Versioned<byte[]>>> entries(int partition)
Description copied from interface: StorageEngine
Get an iterator over pairs of entries in a store's partition. 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[]>
Overrides:
entries in class AbstractStorageEngine<ByteArray,byte[],byte[]>
Parameters:
partition - partition whose entries are to be fetched
Returns:
An iterator over the entries in this StorageEngine.

keys

public ClosableIterator<ByteArray> keys(int partition)
Description copied from interface: StorageEngine
Get an iterator over keys in the store's partition 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[]>
Overrides:
keys in class AbstractStorageEngine<ByteArray,byte[],byte[]>
Parameters:
partition - partition whose keys are to be fetched
Returns:
An iterator over the keys in this StorageEngine.

close

public void close()
           throws PersistenceFailureException
Description copied from interface: Store
Close the store.

Specified by:
close in interface Store<ByteArray,byte[],byte[]>
Overrides:
close in class AbstractStore<ByteArray,byte[],byte[]>
Throws:
PersistenceFailureException

delete

public boolean delete(ByteArray key,
                      Version maxVersion)
               throws PersistenceFailureException
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 AbstractStore<ByteArray,byte[],byte[]>
Parameters:
key - The key to delete
maxVersion - The current value of the key
Returns:
True if anything was deleted
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[]>
Overrides:
getAll in class AbstractStore<ByteArray,byte[],byte[]>
Parameters:
keys - The keys to check for.
Returns:
A Map of keys to a list of versioned values.
Throws:
VoldemortException

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[]>
Overrides:
get in class AbstractStore<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

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[]>
Overrides:
put in class AbstractStore<ByteArray,byte[],byte[]>
Parameters:
key - The key to use
value - The value to store and its version.
Throws:
PersistenceFailureException

getVersions

public java.util.List<Version> getVersions(ByteArray key)
Description copied from interface: Store
Get the versions associated with the given key. This is used in a put call to write a new value for this key

Specified by:
getVersions in interface Store<ByteArray,byte[],byte[]>
Overrides:
getVersions in class AbstractStore<ByteArray,byte[],byte[]>
Parameters:
key - The key to retrieve the versions for
Returns:
List of Versions associated with this key.


Jay Kreps, Roshan Sumbaly, Alex Feinberg, Bhupesh Bansal, Lei Gao, Chinmay Soman, Vinoth Chandar, Zhongjie Wu