Package org.apache.ignite.internal.processors.query.h2.opt

Class QueryContextRegistry

java.lang.Object

org.apache.ignite.internal.processors.query.h2.opt.QueryContextRegistry

public class QueryContextRegistry
extends Object

Registry of all currently available query contexts.

Constructor Summary

Constructors

Constructor	Description
QueryContextRegistry()

Method Summary

Modifier and Type	Method	Description
boolean	clearShared(UUID nodeId, long qryId)	Clear shared context.
void	clearSharedOnLocalNodeStop()	Clear shared contexts on local node stop.
void	clearSharedOnRemoteNodeStop(UUID nodeId)	Clear shared contexts on remote node stop.
@Nullable QueryContext	getShared(UUID nodeId, long qryId, int segmentId)	Access query context from another thread.
void	setShared(UUID nodeId, long qryId, QueryContext ctx)	Sets current thread local context.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryContextRegistry

public QueryContextRegistry()

Method Detail

getShared

@Nullable
public @Nullable QueryContext getShared(UUID nodeId,
                                        long qryId,
                                        int segmentId)

Access query context from another thread.

Parameters:

nodeId - The node who initiated the query.

qryId - The query ID.

segmentId - Index segment ID.

Returns:

Query context.

setShared

public void setShared(UUID nodeId,
                      long qryId,
                      QueryContext ctx)

Sets current thread local context. This method must be called when all the non-volatile properties are already set to ensure visibility for other threads.

Parameters:

ctx - Query context.

clearShared

public boolean clearShared(UUID nodeId,
                           long qryId)

Clear shared context.

Parameters:

nodeId - The node who initiated the query.

qryId - The query ID.

Returns:

True if context was found.

clearSharedOnLocalNodeStop

public void clearSharedOnLocalNodeStop()

Clear shared contexts on local node stop.

clearSharedOnRemoteNodeStop

public void clearSharedOnRemoteNodeStop(UUID nodeId)

Clear shared contexts on remote node stop.

Parameters:

nodeId - Remote node ID.