org.corfudb.infrastructure

Interface IDataStore

All Known Implementing Classes:

DataStore

public interface IDataStore

Key Value data store abstraction that provides persistence for variables that need retain values across node restarts or need to be accessed by multiple modules/threads.

The key value store is partitioned by prefix (namespace/table). All values being stored under a prefix should be of a single Type or Class T.

Created by mdhawan on 7/27/16.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	IDataStore.KvRecord<T> Key-value meta information class, provides all the information for saving and getting data from a data store

Method Summary

Modifier and Type	Method and Description
<T> void	delete(Class<T> tclass, String prefix, String key) Deprecated.
<T> void	delete(IDataStore.KvRecord<T> key) Deletes the value for a key under a prefix.
<T> T	get(Class<T> tclass, String prefix, String key) Deprecated.
<T> T	get(IDataStore.KvRecord<T> key) Retrieves the value for a key under a prefix.
<T> T	get(IDataStore.KvRecord<T> key, T defaultValue) Retrieves the value for a key or a default value
<T> void	put(Class<T> tclass, String prefix, String key, T value) Deprecated.
<T> void	put(IDataStore.KvRecord<T> key, T value) Stores a value for a key under a prefix (namespace).

Method Detail

put

@Deprecated
<T> void put(Class<T> tclass,
                         String prefix,
                         String key,
                         T value)

Deprecated.

get

@Deprecated
<T> T get(Class<T> tclass,
                      String prefix,
                      String key)

Deprecated.

delete

@Deprecated
<T> void delete(Class<T> tclass,
                            String prefix,
                            String key)

Deprecated.

put

<T> void put(IDataStore.KvRecord<T> key,
             T value)

Stores a value for a key under a prefix (namespace).

Parameters:

key - record meta information

value - Immutable value (or a value that won't be changed)

get

<T> T get(IDataStore.KvRecord<T> key)

Retrieves the value for a key under a prefix.

Parameters:

key - record meta information

Returns:

value stored under key

get

<T> T get(IDataStore.KvRecord<T> key,
          T defaultValue)

Retrieves the value for a key or a default value

Type Parameters:

T -

Parameters:

key - key meta info

defaultValue - a default value

Returns:

delete

<T> void delete(IDataStore.KvRecord<T> key)

Deletes the value for a key under a prefix.

Parameters:

key - record meta information