1 /*******************************************************************************
2 * Copyright 2017 ZTE, Inc. and others.
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
13 ******************************************************************************/
14 package org.onap.msb.sdk.httpclient.lb;
16 import java.util.concurrent.atomic.AtomicLong;
18 import org.onap.msb.sdk.httpclient.ServiceHttpEndPointObject;
19 import org.onap.msb.sdk.httpclient.exception.RetrofitServiceRuntimeException;
25 public class RoundRobinLBStrategy implements ILoadBalanceStrategy {
27 private AtomicLong invokeCount = new AtomicLong(0);
33 * com.zte.ums.zenap.httpclient.retrofit.lb.ILoadBalanceStrategy#chooseEndPointObject(com.zte.ums.
34 * zenap.httpclient.retrofit.lb.LoadBalanceContext)
37 public ServiceHttpEndPointObject chooseEndPointObject(LoadBalanceContext lbCtx) {
39 long invokecount = invokeCount.getAndIncrement();
41 if (lbCtx.getEndPoints().size() == 0) {
42 throw new RetrofitServiceRuntimeException("target endPoints is empty");
45 int mod = (int) (invokecount % lbCtx.getEndPoints().size());
47 return lbCtx.getEndPoints().get(mod);