Package org.apache.cayenne.access
Class ClientServerChannel
- java.lang.Object
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- org.apache.cayenne.access.ClientServerChannel
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- All Implemented Interfaces:
DataChannel
public class ClientServerChannel extends 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
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Field Summary
Fields Modifier and Type Field Description protected DataContextserverContext-
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
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Constructor Summary
Constructors Constructor Description ClientServerChannel(DataContext serverContext)Creates a ClientServerChannel that wraps a specified DataContext.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description EntityResolvergetEntityResolver()Returns an EntityResolver instance that contains runtime mapping information.EventManagergetEventManager()Returns an EventManager associated with this channel.DataChannelgetParentChannel()QueryResponseonQuery(ObjectContext context, Query query)Executes a query, using provided context to register persistent objects if query returns any objects.GraphDiffonSync(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.
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Field Detail
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serverContext
protected DataContext serverContext
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Constructor Detail
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ClientServerChannel
public ClientServerChannel(DataContext serverContext)
Creates a ClientServerChannel that wraps a specified DataContext.- Since:
- 3.0
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Method Detail
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onQuery
public QueryResponse onQuery(ObjectContext context, Query query)
Description copied from interface:DataChannelExecutes a query, using provided context to register persistent objects if query returns any objects.- Specified by:
onQueryin interfaceDataChannel- Parameters:
context- an ObjectContext that originated the query, used to register result objects.- Returns:
- a generic response object that encapsulates result of the execution.
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getParentChannel
public DataChannel getParentChannel()
- Since:
- 3.1
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getEntityResolver
public EntityResolver getEntityResolver()
Description copied from interface:DataChannelReturns an EntityResolver instance that contains runtime mapping information.- Specified by:
getEntityResolverin interfaceDataChannel
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getEventManager
public EventManager getEventManager()
Description copied from interface:DataChannelReturns an EventManager associated with this channel. Channel may return null if EventManager is not available for any reason.- Specified by:
getEventManagerin interfaceDataChannel
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onSync
public GraphDiff onSync(ObjectContext originatingContext, GraphDiff changes, int syncType)
Description copied from interface:DataChannelProcesses 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:
onSyncin interfaceDataChannel- Parameters:
originatingContext- an ObjectContext that initiated the sync. Can be null.changes- diff from the context that initiated the sync.syncType- One ofDataChannel.FLUSH_NOCASCADE_SYNC,DataChannel.FLUSH_CASCADE_SYNC,DataChannel.ROLLBACK_CASCADE_SYNC.
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