org.springframework.data.hazelcast

Class HazelcastQueryEngine

java.lang.Object

org.springframework.data.keyvalue.core.QueryEngine<HazelcastKeyValueAdapter,com.hazelcast.query.Predicate<?,?>,Comparator<Map.Entry<?,?>>>

org.springframework.data.hazelcast.HazelcastQueryEngine

public class HazelcastQueryEngine
extends org.springframework.data.keyvalue.core.QueryEngine<HazelcastKeyValueAdapter,com.hazelcast.query.Predicate<?,?>,Comparator<Map.Entry<?,?>>>

Implementation of findBy*() and countBy*{} queries.

Author:

Christoph Strobl, Neil Stevenson, Viacheslav Petriaiev

Constructor Summary

Constructors

Constructor and Description
HazelcastQueryEngine()

Method Summary

Modifier and Type	Method and Description
long	count(com.hazelcast.query.Predicate<?,?> criteria, String keyspace) Execute countBy*() queries against a Hazelcast map.
Collection<?>	execute(com.hazelcast.query.Predicate<?,?> criteria, Comparator<Map.Entry<?,?>> sort, long offset, int rows, String keyspace) Construct the final query predicate for Hazelcast to execute, from the base query plus any paging and sorting.

Methods inherited from class org.springframework.data.keyvalue.core.QueryEngine

count, execute, execute, execute, getAdapter, getRequiredAdapter, registerAdapter

Methods inherited from class java.lang.Object

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

Constructor Detail

HazelcastQueryEngine

public HazelcastQueryEngine()

Method Detail

execute

public Collection<?> execute(com.hazelcast.query.Predicate<?,?> criteria,
                             Comparator<Map.Entry<?,?>> sort,
                             long offset,
                             int rows,
                             String keyspace)

Construct the final query predicate for Hazelcast to execute, from the base query plus any paging and sorting.

Variations here allow the base query predicate to be omitted, sorting to be omitted, and paging to be omitted.

Specified by:

execute in class org.springframework.data.keyvalue.core.QueryEngine<HazelcastKeyValueAdapter,com.hazelcast.query.Predicate<?,?>,Comparator<Map.Entry<?,?>>>

Parameters:

criteria - Search criteria, null means match everything

sort - Possibly null collation

offset - Start point of returned page, -1 if not used

rows - Size of page, -1 if not used

keyspace - The map name

Returns:

Results from Hazelcast

count

public long count(com.hazelcast.query.Predicate<?,?> criteria,
                  String keyspace)

Execute countBy*() queries against a Hazelcast map.

Specified by:

count in class org.springframework.data.keyvalue.core.QueryEngine<HazelcastKeyValueAdapter,com.hazelcast.query.Predicate<?,?>,Comparator<Map.Entry<?,?>>>

Parameters:

criteria - Predicate to use, not null

keyspace - The map name

Returns:

Results from Hazelcast