Package com.atlassian.crowd.search.util

Class QuerySplitter

java.lang.Object

com.atlassian.crowd.search.util.QuerySplitter

public class QuerySplitter
extends Object

Utility class for executing split queries and merging results.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	QuerySplitter.EntitySearcher<T,E extends Exception>
static interface	QuerySplitter.MembershipSearcher<T,E extends Exception>
static interface	QuerySplitter.Searcher<T,Q extends Query<T>,E extends Exception>

Constructor Summary

Constructors

Constructor	Description
QuerySplitter()

Method Summary

Modifier and Type	Method	Description
static <T, E extends Exception> List<T>	batchConditionsIfNeeded(EntityQuery<T> query, QuerySplitter.EntitySearcher<T,E> searcher, int maxRestrictionsPerQuery)	Splits the query if needed, executes it, aggregates and returns results.
static <T, E extends Exception> List<T>	batchNamesToMatchIfNeeded(MembershipQuery<T> query, QuerySplitter.MembershipSearcher<T,E> searcher, int maxBatchSize)	Splits the query if needed, executes it, aggregates and returns results.

Methods inherited from class java.lang.Object

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

Constructor Details

QuerySplitter

public QuerySplitter()

Method Details

batchConditionsIfNeeded

public static <T,
E extends Exception> List<T> batchConditionsIfNeeded(EntityQuery<T> query,
 QuerySplitter.EntitySearcher<T,E> searcher,
 int maxRestrictionsPerQuery)
                                                               throws E

Splits the query if needed, executes it, aggregates and returns results. Query is split if the number of OR conditions is higher than maxRestrictionsPerQuery. Only top level condition split is supported.

Type Parameters:

T - result type

Parameters:

query - original query to be executed

searcher - query results provider

maxRestrictionsPerQuery - maximum number of restrictions allowed in the single query

Returns:

results of the original query

Throws:

OperationFailedException - rethrows exception from searcher

E extends Exception

batchNamesToMatchIfNeeded

public static <T,
E extends Exception> List<T> batchNamesToMatchIfNeeded(MembershipQuery<T> query,
 QuerySplitter.MembershipSearcher<T,E> searcher,
 int maxBatchSize)
                                                                 throws E

Splits the query if needed, executes it, aggregates and returns results. Query is split if the size of MembershipQuery.getEntityNamesToMatch() is higher than maxBatchSize.

Type Parameters:

T - result type

Parameters:

query - original query to be executed

searcher - query results provider

maxBatchSize - maximum number of MembershipQuery.getEntityNamesToMatch() allowed in the single query

Returns:

results of the original query

Throws:

OperationFailedException - rethrows exception from searcher

E extends Exception