fabric.dissemination

Interface FetchManager

All Known Implementing Classes:

DummyFetchManager, PastryFetchManager

public interface FetchManager

A FetchManager is responsible for retrieving objects from Stores via a dissemination layer. Workers may load different FetchManagers at run time to make use of different dissemination networks.

Method Summary

Modifier and Type	Method and Description
void	destroy() Called to destroy and clean up the fetch manager.
ObjectGroup	fetch(RemoteStore store, long onum) Fetches the glob identified by the given onum, located at the given store.
boolean	updateCaches(RemoteStore store, long onum, AbstractGlob<?> update) Updates the dissemination and worker caches with the given glob.

Method Detail

fetch

ObjectGroup fetch(RemoteStore store,
                  long onum)
           throws AccessException

Fetches the glob identified by the given onum, located at the given store.

Parameters:

store - the store.

onum - the object identifier.

Returns:

the requested glob if fetch was successful.

Throws:

AccessException

UnreachableNodeException

destroy

void destroy()

Called to destroy and clean up the fetch manager.

updateCaches

boolean updateCaches(RemoteStore store,
                     long onum,
                     AbstractGlob<?> update)

Updates the dissemination and worker caches with the given glob.

Returns:

true iff there was a dissemination-cache entry for the given oid.