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

Interface ImmutableQueryCollection

All Known Subinterfaces:

EstimatedImmutableQueryCollection, EstimatedQueryCollection, QueryCollection

All Known Implementing Classes:

DefaultEstimatedQueryCollection, DefaultQueryCollection, ThreadSafeEstimatedQueryCollection, ThreadSafeQueryCollection

public interface ImmutableQueryCollection

ImmutableQueryCollection interface defines immutable behaviours on queries existing in lens system.

Method Summary

Modifier and Type	Method and Description
Set<QueryContext>	getQueries()
Set<QueryContext>	getQueries(String user)
int	getQueriesCount()
Integer	getQueryIndex(QueryContext query)

Method Detail

getQueries

Set<QueryContext> getQueries()

Returns:

A new set copied from this collection of queries. 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.

getQueries

Set<QueryContext> getQueries(String user)

Parameters:

user - User for whom queries have to be returned.

Returns:

A set of queries submitted by the given user. 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()

Returns:

Count of existing queries

getQueryIndex

Integer getQueryIndex(QueryContext query)

Returns:

Index of a query within collection