com.caplin.transformer.module.persistence

Interface Persistence

All Known Implementing Classes:

PersistenceImpl

public interface Persistence

Interface defining the methods for storing and retrieving values from the Transformers persistence store

The persistence implementation requires the following table to be present in the database the persistence module is configured to connect to.

 CREATE TABLE if not exists TF_LEGACY_PERSISTENCE (
  JTM_KEY TEXT PRIMARY KEY NOT NULL,
  JTM_VALUE TEXT
 );

Method Summary

Modifier and Type	Method and Description
void	addChangeListener(String prefix, PersistenceChangeListener listener) Deprecated. This feature was removed in Transformer 7.0
void	delete(String key) Delete a key from the database
PersistedValue	get(String key) Retreive a from Transformers persistence store
void	put(PersistedValue persistedValue) Store a value, multiple puts with the same key will override previously stored values
PersistedValue[]	query(String query) Query for all entries whose keys start with the query

Method Detail

put

void put(PersistedValue persistedValue)

Store a value, multiple puts with the same key will override previously stored values

Parameters:

persistedValue - value to be stored

get

PersistedValue get(String key)

Retreive a from Transformers persistence store

Parameters:

key - The key associated with the entry

Returns:

The persisted value if it exists, null otherwise

query

PersistedValue[] query(String query)

Query for all entries whose keys start with the query

Parameters:

query - prefix to query for

Returns:

Array of PersistedValue objects. Never null

delete

void delete(String key)

Delete a key from the database

Parameters:

key - Key to delete

addChangeListener

@Deprecated
void addChangeListener(String prefix,
                                   PersistenceChangeListener listener)

Deprecated. This feature was removed in Transformer 7.0

Does nothing

Parameters:

prefix - Prefix of keys we're interested in

listener - Object to be called when data changes