5.3. Remote Query

When executing remote queries the cacheManager must be an instance of RemoteCacheManager, and an example configuration utilizing a RemoteCacheManager is found below for both Java and blueprint.xml:

from("direct:start")
    .setHeader(InfinispanConstants.OPERATION, InfinispanConstants.QUERY)
    .setHeader(InfinispanConstants.QUERY_BUILDER,
      new InfinispanQueryBuilder() {
        public Query build(QueryFactory<Query> queryFactory) {
          return queryFactory.from(User.class).having("name").like("%abc%")
                      .toBuilder().build();
        }
      })
    .to("infinispan://localhost?cacheContainer=#cacheManager&cacheName=remote_query_cache") ;

Java RemoteCacheManagerFactory class:

public class RemoteCacheManagerFactory {      
    ConfigurationBuilder clientBuilder;
    public RemoteCacheManagerFactory(String hostname, int port) {
        clientBuilder = new ConfigurationBuilder();
        clientBuilder.addServer()
            .host(hostname).port(port);
    }
    public RemoteCacheManager newRemoteCacheManager() {
        return new RemoteCacheManager(clientBuilder.build());
    }
}

Java InfinispanQueryExample class:

public class InfinispanQueryExample {
    public InfinispanQueryBuilder getBuilder() {
        return new InfinispanQueryBuilder() {
            public Query build(QueryFactory<Query> queryFactory) {
                return queryFactory.from(User.class)
                         .having("name")
                         .like("%abc%")
                         .toBuilder().build();
            }
        }
    }
}

blueprint.xml:

<bean id=”remoteCacheManagerFactory” class=“com.jboss.datagrid.RemoteCacheManagerFactory”>  
    <argument value=”localhost”/>      
    <argument value="11222”/>      
</bean>
 
<bean id=”cacheManager”
    factory-ref=”remoteCacheManagerFactory” 
    factory-method=“newRemoteCacheManager”>   
</bean>

<bean id="queryBuilder" class="org.example.com.InfinispanQueryExample"/>

<camelContext id="route" xmlns="http://camel.apache.org/schema/blueprint">
    <route>
        <from uri="direct:start"/>
            <setHeader headerName="CamelInfinispanOperation">
                <constant>CamelInfinispanOperationQuery</constant>
            </setHeader>
            <setHeader headerName="CamelInfinispanQueryBuilder">
                <method ref="queryBuilder" method="getBuilder"/>
            </setHeader>
        <to uri="infinispan://localhost?cacheContainer=#cacheManager&cacheName=remote_query_cache"/>
    </route>
</camelContext>

The remote_query_cache is an arbitrary name for a cache that holds the data, and the results of the query will be a list of domain objects stored as a CamelInfinispanOperationResult header.

In addition, there are the following requirements:

For more details on how to setup a RemoteCacheManager, see the Remote Querying section of the Red Hat JBoss Data Grid Infinispan Query Guide.