mondrian.rolap.agg

Class CellRequestQuantumExceededException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

mondrian.rolap.agg.CellRequestQuantumExceededException

All Implemented Interfaces:

Serializable

public final class CellRequestQuantumExceededException
extends RuntimeException

Signals that there are enough outstanding cell requests that it is worth terminating this phase of execution and asking the segment cache for all of the cells that have been asked for.

Not really an exception, just a way of aborting a process so that we can do some work and restart the process. Any code that handles this exception is typically in a loop that calls RolapResult.phase().

There are several advantages to this:

• If the query has been run before, the cells will be in the cache already, and this is an opportunity to copy them into the local cache.
• If cell requests are for the same or similar cells, it gives opportunity to fetch these cells. Then the requests can be answered from local cache, and we don't need to bother the cache manager with similar requests.
• Prevents memory from filling up with cell requests.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static CellRequestQuantumExceededException	INSTANCE

Method Summary

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final CellRequestQuantumExceededException INSTANCE