| /* |
| * 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.camel.spring.cloud; |
| |
| import java.util.Optional; |
| |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.CamelContextAware; |
| import org.apache.camel.cloud.ServiceLoadBalancer; |
| import org.apache.camel.cloud.ServiceLoadBalancerFunction; |
| import org.apache.camel.support.service.ServiceSupport; |
| import org.apache.camel.util.ObjectHelper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.cloud.client.loadbalancer.LoadBalancerClient; |
| |
| public class CamelSpringCloudServiceLoadBalancer extends ServiceSupport implements CamelContextAware, ServiceLoadBalancer { |
| private static final Logger LOGGER = LoggerFactory.getLogger(CamelSpringCloudServiceLoadBalancer.class); |
| |
| private final LoadBalancerClient loadBalancerClient; |
| private final ServiceLoadBalancer loadBalancer; |
| private CamelContext camelContext; |
| |
| public CamelSpringCloudServiceLoadBalancer(LoadBalancerClient loadBalancerClient, Optional<LoadBalancerClientAdapter> clientAdapter) { |
| this.loadBalancerClient = loadBalancerClient; |
| this.loadBalancer = clientAdapter.orElseGet(DefaultLoadBalancerClientAdapter::new).adapt(loadBalancerClient); |
| } |
| |
| @Override |
| public CamelContext getCamelContext() { |
| return camelContext; |
| } |
| |
| @Override |
| public void setCamelContext(CamelContext camelContext) { |
| this.camelContext = camelContext; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| ObjectHelper.notNull(camelContext, "camelContext"); |
| ObjectHelper.notNull(loadBalancerClient, "loadBalancerClient"); |
| |
| LOGGER.info("ServiceCall is using cloud load balancer of type: {}", loadBalancerClient.getClass()); |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| } |
| |
| @Override |
| public <T> T process(String serviceName, ServiceLoadBalancerFunction<T> function) throws Exception { |
| return loadBalancer.process(serviceName, function); |
| } |
| |
| // ******************************* |
| // |
| // ******************************* |
| |
| @FunctionalInterface |
| public interface LoadBalancerClientAdapter { |
| ServiceLoadBalancer adapt(LoadBalancerClient client); |
| } |
| } |