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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:

Using only Java

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") ;

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") ;

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Using Blueprint and Java

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());
    }
}

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());
    }
}

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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();
            }
        }
    }
}

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();
            }
        }
    }
}

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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>

<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>

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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:

The RemoteCacheManager must be configured to use ProtoStreamMarshaller.
The ProtoStreamMarshaller must be registered with the RemoteCacheManager's serialization context.
The .proto descriptors for domain objects must be registered with the remote JBoss Data Grid server.

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

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5.3. Remote Query

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