org.apache.cayenne.access
Class ClientServerChannel

java.lang.Object
  extended by org.apache.cayenne.access.ClientServerChannel
All Implemented Interfaces:
DataChannel

public class ClientServerChannel
extends java.lang.Object
implements DataChannel

A DataChannel that provides a server-side end of the bridge between client and server objects in a Remote Object Persistence stack.

Since:
1.2

Field Summary
protected  DataContext serverContext
           
 
Fields inherited from interface org.apache.cayenne.DataChannel
FLUSH_CASCADE_SYNC, FLUSH_NOCASCADE_SYNC, GRAPH_CHANGED_SUBJECT, GRAPH_FLUSHED_SUBJECT, GRAPH_ROLLEDBACK_SUBJECT, ROLLBACK_CASCADE_SYNC
 
Constructor Summary
ClientServerChannel(DataContext serverContext)
          Creates a ClientServerChannel that wraps a specified DataContext.
ClientServerChannel(DataDomain domain)
          Deprecated. since 3.1 as context creation is now factory based.
 
Method Summary
 EntityResolver getEntityResolver()
          Returns an EntityResolver instance that contains runtime mapping information.
 EventManager getEventManager()
          Returns an EventManager associated with this channel.
 DataChannel getParentChannel()
           
 QueryResponse onQuery(ObjectContext context, Query query)
          Executes a query, using provided context to register persistent objects if query returns any objects.
 GraphDiff onSync(ObjectContext originatingContext, GraphDiff changes, int syncType)
          Processes synchronization request from a child ObjectContext, returning a GraphDiff that describes changes to objects made on the receiving end as a result of synchronization.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

serverContext

protected DataContext serverContext
Constructor Detail

ClientServerChannel

@Deprecated
public ClientServerChannel(DataDomain domain)
Deprecated. since 3.1 as context creation is now factory based.


ClientServerChannel

public ClientServerChannel(DataContext serverContext)
Creates a ClientServerChannel that wraps a specified DataContext.

Since:
3.0
Method Detail

onQuery

public QueryResponse onQuery(ObjectContext context,
                             Query query)
Description copied from interface: DataChannel
Executes a query, using provided context to register persistent objects if query returns any objects.

Specified by:
onQuery in interface DataChannel
Parameters:
context - an ObjectContext that originated the query, used to register result objects.
Returns:
a generic response object that encapsulates result of the execution.

getParentChannel

public DataChannel getParentChannel()
Since:
3.1

getEntityResolver

public EntityResolver getEntityResolver()
Description copied from interface: DataChannel
Returns an EntityResolver instance that contains runtime mapping information.

Specified by:
getEntityResolver in interface DataChannel

getEventManager

public EventManager getEventManager()
Description copied from interface: DataChannel
Returns an EventManager associated with this channel. Channel may return null if EventManager is not available for any reason.

Specified by:
getEventManager in interface DataChannel

onSync

public GraphDiff onSync(ObjectContext originatingContext,
                        GraphDiff changes,
                        int syncType)
Description copied from interface: DataChannel
Processes synchronization request from a child ObjectContext, returning a GraphDiff that describes changes to objects made on the receiving end as a result of synchronization.

Specified by:
onSync in interface DataChannel
Parameters:
originatingContext - an ObjectContext that initiated the sync. Can be null.
changes - diff from the context that initiated the sync.
syncType - One of DataChannel.FLUSH_NOCASCADE_SYNC, DataChannel.FLUSH_CASCADE_SYNC, DataChannel.ROLLBACK_CASCADE_SYNC.


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