Package com.github.ddth.dao.nosql
Interface IKvStorage
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- All Known Implementing Classes:
BaseKvDao
,CassandraKvStorage
,LuceneKvStorage
public interface IKvStorage
APIs to access the {key:value} NoSQL storage.- Storage can be divided into spaces (namespaces), each space is identified by an unique id
key: String
value: byte[]
- Since:
- 0.10.0
- Author:
- Thanh Nguyen
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description default void
delete(java.lang.String spaceId, java.lang.String key)
Delete an existing entry from storage.void
delete(java.lang.String spaceId, java.lang.String key, IDeleteCallback callback)
Delete an existing entry from storage.default <T> T
get(IKvEntryMapper<T> mapper, java.lang.String spaceId, java.lang.String key)
Get/Load an entry by key.byte[]
get(java.lang.String spaceId, java.lang.String key)
Get/Load an entry by key.default boolean
keyExists(java.lang.String spaceId, java.lang.String key)
Check if a key exists.default void
put(java.lang.String spaceId, java.lang.String key, byte[] value)
Put/Store an entry.void
put(java.lang.String spaceId, java.lang.String key, byte[] value, IPutCallback<byte[]> callback)
Put/Store an entry.long
size(java.lang.String spaceId)
Return number of entries.
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Method Detail
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delete
default void delete(java.lang.String spaceId, java.lang.String key) throws java.io.IOException
Delete an existing entry from storage.- Parameters:
spaceId
-key
-- Throws:
java.io.IOException
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delete
void delete(java.lang.String spaceId, java.lang.String key, IDeleteCallback callback) throws java.io.IOException
Delete an existing entry from storage.- Parameters:
spaceId
-key
-callback
-- Throws:
java.io.IOException
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keyExists
default boolean keyExists(java.lang.String spaceId, java.lang.String key) throws java.io.IOException
Check if a key exists.- Parameters:
spaceId
-key
-- Returns:
- Throws:
java.io.IOException
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get
byte[] get(java.lang.String spaceId, java.lang.String key) throws java.io.IOException
Get/Load an entry by key.- Parameters:
spaceId
-key
-- Returns:
- Throws:
java.io.IOException
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get
default <T> T get(IKvEntryMapper<T> mapper, java.lang.String spaceId, java.lang.String key) throws java.io.IOException
Get/Load an entry by key.- Parameters:
mapper
-spaceId
-key
-- Returns:
- Throws:
java.io.IOException
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put
default void put(java.lang.String spaceId, java.lang.String key, byte[] value) throws java.io.IOException
Put/Store an entry.- Parameters:
spaceId
-key
-value
-- Throws:
java.io.IOException
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put
void put(java.lang.String spaceId, java.lang.String key, byte[] value, IPutCallback<byte[]> callback) throws java.io.IOException
Put/Store an entry.- Parameters:
spaceId
-key
-value
-callback
-- Throws:
java.io.IOException
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size
long size(java.lang.String spaceId) throws java.io.IOException
Return number of entries.- Parameters:
spaceId
-- Returns:
- number of entries currently in the storage,
-1
if counting number entries is not supported - Throws:
java.io.IOException
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