Package org.eclipse.aether

Class DefaultRepositoryCache

java.lang.Object

org.eclipse.aether.DefaultRepositoryCache

All Implemented Interfaces:

RepositoryCache

public final class DefaultRepositoryCache
extends Object
implements RepositoryCache

A simplistic repository cache backed by a thread-safe map. The simplistic nature of this cache makes it only suitable for use with short-lived repository system sessions where pruning of cache data is not required.

Constructor Summary

Constructors

Constructor	Description
DefaultRepositoryCache()

Method Summary

Modifier and Type	Method	Description
Object	computeIfAbsent(RepositorySystemSession session, Object key, Supplier<Object> supplier)	Retrieve or compute the data associated with the specified key.
Object	get(RepositorySystemSession session, Object key)	Gets the specified data from the cache.
void	put(RepositorySystemSession session, Object key, Object data)	Puts the specified data into the cache.

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultRepositoryCache

public DefaultRepositoryCache()

Method Details

get

public Object get(RepositorySystemSession session,
 Object key)

Description copied from interface: RepositoryCache

Gets the specified data from the cache.

Warning: The cache will directly return the saved reference. If the cached data is to be modified after its retrieval, the caller is responsible to create a copy of the returned data and use this instead of the cache record.

Specified by:

get in interface RepositoryCache

Parameters:

session - The repository session during which the cache is accessed, must not be null.

key - The key to use for lookup of the data, must not be null.

Returns:

The requested data or null if none was present in the cache.

put

public void put(RepositorySystemSession session,
 Object key,
 Object data)

Description copied from interface: RepositoryCache

Puts the specified data into the cache. It is entirely up to the cache implementation how long this data will be kept before being purged, i.e. callers must not make any assumptions about the lifetime of cached data.

Warning: The cache will directly save the provided reference. If the cached data is mutable, i.e. could be modified after being put into the cache, the caller is responsible for creating a copy of the original data and store the copy in the cache.

Specified by:

put in interface RepositoryCache

Parameters:

session - The repository session during which the cache is accessed, must not be null.

key - The key to use for lookup of the data, must not be null.

data - The data to store in the cache, may be null.

computeIfAbsent

public Object computeIfAbsent(RepositorySystemSession session,
 Object key,
 Supplier<Object> supplier)

Description copied from interface: RepositoryCache

Retrieve or compute the data associated with the specified key.

Specified by:

computeIfAbsent in interface RepositoryCache

Parameters:

key - The key for which to retrieve the session data, must not be null.

supplier - The supplier will compute the new value, must not be null.

Returns:

The cache data associated with the key.