Examples with RouterAPI com.tencent.polaris.router.api.core.RouterAPI used on opensource projects

Example 1 with RouterAPI

use of com.tencent.polaris.router.api.core.RouterAPI in project polaris-java by polarismesh.

the class RouterExample method main.

public static void main(String[] args) throws Exception {
    InitResult initResult = ExampleUtils.initConsumerConfiguration(args);
    String namespace = initResult.getNamespace();
    String service = initResult.getService();
    try (SDKContext sdkContext = SDKContext.initContext()) {
        ConsumerAPI consumerAPI = DiscoveryAPIFactory.createConsumerAPIByContext(sdkContext);
        RouterAPI routerAPI = RouterAPIFactory.createRouterAPIByContext(sdkContext);
        // 1. 拉取全量服务实例
        GetAllInstancesRequest getAllInstancesRequest = new GetAllInstancesRequest();
        getAllInstancesRequest.setNamespace(namespace);
        getAllInstancesRequest.setService(service);
        InstancesResponse allInstanceResp = consumerAPI.getAllInstance(getAllInstancesRequest);
        ServiceInstances dstInstances = allInstanceResp.toServiceInstances();
        // 2. 执行服务路由
        ProcessRoutersRequest processRoutersRequest = new ProcessRoutersRequest();
        // 被调服务
        System.out.printf("instances count before routing is %s%n", dstInstances.getInstances().size());
        // 主调方信息
        ServiceInfo srcSourceInfo = new ServiceInfo();
        Map<String, String> labels = new HashMap<>();
        labels.put("env", "test");
        srcSourceInfo.setMetadata(labels);
        RouterNamesGroup routerNamesGroup = new RouterNamesGroup();
        List<String> coreRouters = new ArrayList<>();
        coreRouters.add(ServiceRouterConfig.DEFAULT_ROUTER_RULE);
        coreRouters.add(ServiceRouterConfig.DEFAULT_ROUTER_METADATA);
        coreRouters.add(ServiceRouterConfig.DEFAULT_ROUTER_NEARBY);
        // 设置走规则路由
        routerNamesGroup.setCoreRouters(coreRouters);
        processRoutersRequest.setDstInstances(dstInstances);
        processRoutersRequest.setSourceService(srcSourceInfo);
        processRoutersRequest.setRouters(routerNamesGroup);
        ProcessRoutersResponse processRoutersResponse = routerAPI.processRouters(processRoutersRequest);
        System.out.printf("instances count after routing is %s%n", processRoutersResponse.getServiceInstances().getInstances().size());
        // 3. 执行负载均衡
        ProcessLoadBalanceRequest processLoadBalanceRequest = new ProcessLoadBalanceRequest();
        processLoadBalanceRequest.setDstInstances(processRoutersResponse.getServiceInstances());
        processLoadBalanceRequest.setLbPolicy(LoadBalanceConfig.LOAD_BALANCE_WEIGHTED_RANDOM);
        ProcessLoadBalanceResponse processLoadBalanceResponse = routerAPI.processLoadBalance(processLoadBalanceRequest);
        System.out.printf("instances after lb is %s%n", processLoadBalanceResponse.getTargetInstance());
    }
}