org.apache.lens.server.api.query.collect

Interface EstimatedImmutableQueryCollection

All Superinterfaces:

ImmutableQueryCollection

All Known Subinterfaces:

EstimatedQueryCollection

All Known Implementing Classes:

DefaultEstimatedQueryCollection, ThreadSafeEstimatedQueryCollection

public interface EstimatedImmutableQueryCollection
extends ImmutableQueryCollection

The implementations of this interface should make sure that add behaviours only accepts queries for which selected driver is not null and a valid selected driver query cost is present. IllegalStateException shall be thrown from add behaviours when selected driver is not set or a valid selected driver query cost is not present for the given query.

Method Summary

Modifier and Type	Method and Description
Set<QueryContext>	getQueries(LensDriver driver)
int	getQueriesCount(LensDriver driver)
QueryCost	getTotalQueryCost(String user) Get total query cost of all queries of given user

Methods inherited from interface org.apache.lens.server.api.query.collect.ImmutableQueryCollection

getQueries, getQueries, getQueriesCount, getQueryIndex

Method Detail

getQueries

Set<QueryContext> getQueries(LensDriver driver)

Parameters:

driver - Driver for which queries have to be returned.

Returns:

A set of queries for which given driver is the selected driver. A new set is created and returned. Elements in the set are not cloned or copied. Multiple iterations over returned set are guaranteed to be in same order. If there are no queries, then an empty set is returned. null is never returned.

getQueriesCount

int getQueriesCount(LensDriver driver)

Parameters:

driver - Driver for which count of queries have to be returned.

Returns:

count of queries of given driver.

getTotalQueryCost

QueryCost getTotalQueryCost(String user)

Get total query cost of all queries of given user

Parameters:

user -

Returns:

total query cost of all queries of user