Package org.pipservices3.components.cache

Class NullCache

java.lang.Object

org.pipservices3.components.cache.NullCache

All Implemented Interfaces:

ICache

public class NullCache
extends Object
implements ICache

Dummy cache implementation that doesn't do anything.

It can be used in testing or in situations when cache is required but shall be disabled.

See Also:

• ICache

Constructor Summary

Constructors

Constructor	Description
NullCache()	Creates instance of null cache component.

Method Summary

Modifier and Type	Method	Description
void	remove(String correlationId, String key)	Removes a value from the cache by its key.
Object	retrieve(String correlationId, String key)	Retrieves cached value from the cache using its key.
Object	store(String correlationId, String key, Object value, long timeToLive)	Stores value in the cache with expiration time.

Methods inherited from class java.lang.Object

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

Constructor Details

NullCache

public NullCache()

Creates instance of null cache component.

Method Details

retrieve

public Object retrieve(String correlationId,
 String key)

Retrieves cached value from the cache using its key. If value is missing in the cache or expired it returns null.

Specified by:

retrieve in interface ICache

Parameters:

correlationId - (optional) transaction id to trace execution through call chain.

key - a unique value key.

Returns:

a cached value or null if value wasn't found or timeout expired.

store

public Object store(String correlationId,
 String key,
 Object value,
 long timeToLive)

Stores value in the cache with expiration time.

Specified by:

store in interface ICache

Parameters:

correlationId - (optional) transaction id to trace execution through call chain.

key - a unique value key.

value - a value to store.

timeToLive - expiration timeout in milliseconds.

Returns:

a cached value stored in the cache.

remove

public void remove(String correlationId,
 String key)

Removes a value from the cache by its key.

Specified by:

remove in interface ICache

Parameters:

correlationId - (optional) transaction id to trace execution through call chain.

key - a unique value key.