/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ignite.resources;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Annotates a field or a setter method for injection of {@link org.apache.ignite.compute.ComputeLoadBalancer}.
* Specific implementation for grid load balancer is defined by
* {@link org.apache.ignite.spi.loadbalancing.LoadBalancingSpi}
* which is provided to grid via {@link org.apache.ignite.configuration.IgniteConfiguration}..
* <p>
* Load balancer can be injected into instances of following classes:
* <ul>
* <li>{@link org.apache.ignite.compute.ComputeTask}</li>
* </ul>
* <p>
* Here is how injection would typically happen:
* <pre name="code" class="java">
* public class MyGridTask extends ComputeTask<String, Integer> {
* @LoadBalancerResource
* private ComputeLoadBalancer balancer;
* }
* </pre>
* or
* <pre name="code" class="java">
* public class MyGridTask extends ComputeTask<String, Integer> {
* ...
* private ComputeLoadBalancer balancer;
* ...
* @LoadBalancerResource
* public void setBalancer(ComputeLoadBalancer balancer) {
* this.balancer = balancer;
* }
* ...
* }
* </pre>
* <p>
* See {@link org.apache.ignite.configuration.IgniteConfiguration#getLoadBalancingSpi()} for Grid configuration details.
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.FIELD})
public @interface LoadBalancerResource {
// No-op.
}