Package com.alachisoft.ncache.runtime.datasourceprovider

Interface ReadThruProvider

All Superinterfaces:

java.lang.AutoCloseable

public interface ReadThruProvider
extends java.lang.AutoCloseable

Contains methods used to read an object by its key from the master data source. Must be implemented by read-through components.

Method Summary

Modifier and Type	Method	Description
void	init(java.util.Map<java.lang.String,java.lang.String> parameters, java.lang.String cacheId)	Perform tasks like allocating resources or acquiring connections, etc.
ProviderDataStructureItem	loadDataStructureFromSource(java.lang.String key, DistributedDataStructureType distributedDataStructureType)	Responsible for loading the object from the data source.
ProviderCacheItem	loadFromSource(java.lang.String key)	Responsible for loading the object from the data source.
java.util.Map<java.lang.String,ProviderCacheItem>	loadFromSource(java.util.Collection<java.lang.String> keys)	Responsible for loading list of objects from the data source.

Methods inherited from interface java.lang.AutoCloseable

close

Method Detail

init

void init(java.util.Map<java.lang.String,java.lang.String> parameters,
          java.lang.String cacheId)
   throws java.lang.Exception

Perform tasks like allocating resources or acquiring connections, etc.

Parameters:

parameters - Startup parameters defined in the configuration.

cacheId - Id of the cache.

Throws:

java.lang.Exception

loadFromSource

ProviderCacheItem loadFromSource(java.lang.String key)
                          throws java.lang.Exception

Responsible for loading the object from the data source. Key is passed as parameter.

Parameters:

key - Key used to reference object.

Returns:

Provider CacheItem present against the key.

Throws:

java.lang.Exception

loadFromSource

java.util.Map<java.lang.String,ProviderCacheItem> loadFromSource(java.util.Collection<java.lang.String> keys)
                                                          throws java.lang.Exception

Responsible for loading list of objects from the data source. Keys are passed as parameter.

Parameters:

keys - The collection of keys to be loaded from the data source.

Returns:

A map that contains keys and corresponding provider items.

Throws:

java.lang.Exception

loadDataStructureFromSource

ProviderDataStructureItem loadDataStructureFromSource(java.lang.String key,
                                                      DistributedDataStructureType distributedDataStructureType)
                                               throws java.lang.Exception

Responsible for loading the object from the data source. Key is passed as a parameter.

Parameters:

key - Key used to reference the object.

distributedDataStructureType - Type of collection.

Returns:

A CacheItem with some limited fields.

Throws:

java.lang.Exception