Class ClusterSyncServiceChain
- java.lang.Object
-
- org.apache.sling.discovery.commons.providers.spi.base.ClusterSyncServiceChain
-
- All Implemented Interfaces:
ClusterSyncService
public class ClusterSyncServiceChain extends java.lang.Object implements ClusterSyncService
Allows chaining of ClusterSyncService, itself implementing the ClusterSyncService interface
-
-
Constructor Summary
Constructors Constructor Description ClusterSyncServiceChain(ClusterSyncService... chain)
Creates a new chain of ClusterSyncService that calls a cascaded sync with the provided ClusterSyncService.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
cancelSync()
void
sync(BaseTopologyView view, java.lang.Runnable callback)
Starts the synchronization process and calls the provided callback upon completion.
-
-
-
Constructor Detail
-
ClusterSyncServiceChain
public ClusterSyncServiceChain(ClusterSyncService... chain)
Creates a new chain of ClusterSyncService that calls a cascaded sync with the provided ClusterSyncService.
-
-
Method Detail
-
sync
public void sync(BaseTopologyView view, java.lang.Runnable callback)
Description copied from interface:ClusterSyncService
Starts the synchronization process and calls the provided callback upon completion.sync() is not thread-safe and should not be invoked concurrently.
If sync() gets called before a previous invocation finished, that previous invocation will be discarded, ie the callback of the previous invocation will no longer be called.
The synchronization process consists of making sure that the repository has processed any potential backlog of instances that are no longer part of the provided, new view. Plus it writes a 'sync-token' to a well-defined location, with all peers doing the same, and upon seeing all other sync-tokens declares successful completion - at which point it calls the callback.run().
- Specified by:
sync
in interfaceClusterSyncService
- Parameters:
view
- the view which all instances in the local cluster should agree on having seencallback
- the runnable which should be called after successful syncing
-
cancelSync
public void cancelSync()
- Specified by:
cancelSync
in interfaceClusterSyncService
-
-