org.apache.druid.query.groupby.resource

Class GroupByQueryResource

java.lang.Object

org.apache.druid.query.groupby.resource.GroupByQueryResource

All Implemented Interfaces:

Closeable, AutoCloseable

public class GroupByQueryResource
extends Object
implements Closeable

This class contains resources required for a groupBy query execution. Currently, it contains only merge buffers, but any additional resources can be added in the future.

Constructor Summary

Constructors

Constructor and Description
GroupByQueryResource()
GroupByQueryResource(List<ReferenceCountingResourceHolder<ByteBuffer>> mergeBufferHolders)

Method Summary

Modifier and Type	Method and Description
void	close()
ResourceHolder<ByteBuffer>	getMergeBuffer() Get a merge buffer from the pre-acquired resources.

Methods inherited from class java.lang.Object

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

Constructor Detail

GroupByQueryResource

public GroupByQueryResource()

GroupByQueryResource

public GroupByQueryResource(List<ReferenceCountingResourceHolder<ByteBuffer>> mergeBufferHolders)

Method Detail

getMergeBuffer

public ResourceHolder<ByteBuffer> getMergeBuffer()

Get a merge buffer from the pre-acquired resources.

Returns:

a resource holder containing a merge buffer

Throws:

IllegalStateException - if this resource is initialized with empty merge buffers, or there isn't any available merge buffers

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable