io.vertigo.dynamo.plugins.kvstore.berkeley

Class BerkeleyKVStorePlugin

java.lang.Object

io.vertigo.dynamo.plugins.kvstore.berkeley.BerkeleyKVStorePlugin

All Implemented Interfaces:

Activeable, Component, Plugin, KVStorePlugin

public final class BerkeleyKVStorePlugin
extends Object
implements KVStorePlugin, Activeable

Implémentation d'un store BerkeleyDB.

Author:

pchretien, npiedeloup

Constructor Summary

Constructors

Constructor and Description
BerkeleyKVStorePlugin(String collections, String dbFilePath, VTransactionManager transactionManager, CodecManager codecManager) Constructor.

Method Summary

Modifier and Type	Method and Description
void	clear(String collection) Removes all elements from a collection.
int	count(String collection)
<C> Optional<C>	find(String collection, String id, Class<C> clazz) Finds the optional element to which the id is mapped inside the specified collection.
<C> List<C>	findAll(String collection, int skip, Integer limit, Class<C> clazz) Finds all elements contained inside the specified collection.
List<String>	getCollections() Returns the list of collections managed by this plugin.
void	put(String collection, String id, Object element) Adds an element defined by an id in a collection.
void	remove(String collection, String id) Removes an element defined by an id from a collection.
void	removeTooOldElements() Remove too old elements.
void	start()
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

BerkeleyKVStorePlugin

@Inject
public BerkeleyKVStorePlugin(@Named(value="collections")
                                      String collections,
                                      @Named(value="dbFilePath")
                                      String dbFilePath,
                                      VTransactionManager transactionManager,
                                      CodecManager codecManager)

Constructor. Collections syntax : - collections are comma separated a revoir (param étendus - collections may defined TimeToLive and Memory configs with a json like syntax : collName;TTL=10;inMemory - TTL default to -1 meaning eternal - inMemory default to false meaning store on file system

Parameters:

collections - List of collections managed by this plugin (comma separated)

dbFilePath - Base Berkeley DB file system path (Could use java env param like user.home user.dir or java.io.tmpdir)

minFreeDisk - Minimum free disk space to maintain, in bytes. If the limit is exceeded, write operations will be prohibited. Default to 100M.

transactionManager - Transaction manager

codecManager - Codec manager

Method Detail

getCollections

public List<String> getCollections()

Returns the list of collections managed by this plugin.

Specified by:

getCollections in interface KVStorePlugin

Returns:

list of collections;

start

public void start()

Specified by:

start in interface Activeable

stop

public void stop()

Specified by:

stop in interface Activeable

removeTooOldElements

public void removeTooOldElements()

Remove too old elements.

remove

public void remove(String collection,
                   String id)

Removes an element defined by an id from a collection. If the collection doesn't contain the is then a exception is thrown.

Specified by:

remove in interface KVStorePlugin

Parameters:

collection - the collection

id - the id

clear

public void clear(String collection)

Removes all elements from a collection.

Specified by:

clear in interface KVStorePlugin

Parameters:

collection - the collection

put

public void put(String collection,
                String id,
                Object element)

Adds an element defined by an id in a collection.

Specified by:

put in interface KVStorePlugin

Parameters:

collection - the collection

id - the id

element - the element

find

public <C> Optional<C> find(String collection,
                            String id,
                            Class<C> clazz)

Finds the optional element to which the id is mapped inside the specified collection. If the element is not found then an empty option is returned.

Specified by:

find in interface KVStorePlugin

Type Parameters:

C - Element type

Parameters:

collection - the collection

id - the id

clazz - the type of the searched element

Returns:

the option

findAll

public <C> List<C> findAll(String collection,
                           int skip,
                           Integer limit,
                           Class<C> clazz)

Finds all elements contained inside the specified collection.

Specified by:

findAll in interface KVStorePlugin

Type Parameters:

C - Element type

Parameters:

collection - the collection

skip - the position from which the elements are returned

limit - the limit size of elements

clazz - the type of the searched element

Returns:

the list of elements.

count

public int count(String collection)

Specified by:

count in interface KVStorePlugin

Parameters:

collection - the collection

Returns:

count of elements into collection