查询抢占式实例中断事件

代码示例（DescribeInstancesSample.java）如下所示：

import com.alibaba.fastjson.JSONArray;
import com.aliyuncs.AcsRequest;
import com.aliyuncs.AcsResponse;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.ecs.model.v20140526.DescribeInstancesRequest;
import com.aliyuncs.ecs.model.v20140526.DescribeInstancesResponse;
import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.profile.IClientProfile;
import java.util.*;

public class DescribeInstancesSample {
    public static void main(String[] args) throws InterruptedException {
        // 初始化DefaultAcsClient实例。
        OpenApiCaller caller = new OpenApiCaller();
        // 设置待查询的一个或多个ECS实例ID。
        JSONArray allInstances = new JSONArray();
        allInstances.addAll(Arrays.asList("i-bp1i9c3qiv1qs6nc****"));
        while (!allInstances.isEmpty()) {
            DescribeInstancesRequest request = new DescribeInstancesRequest();
            // 指定实例所在的地域。
            request.setRegionId("cn-hangzhou");
            // 指定实例ID，查询效率高。
            request.setInstanceIds(allInstances.toJSONString());
            // 接收响应结果。
            DescribeInstancesResponse response = caller.doAction(request);
            // 获取实例相关的返回结果。
            List<DescribeInstancesResponse.Instance> instanceList = response.getInstances();
            if (instanceList != null && !instanceList.isEmpty()) {
                for (DescribeInstancesResponse.Instance instance : instanceList) {
                    // 输出被查询的实例ID与可用区信息。
                    System.out.println("result:instance:" + instance.getInstanceId() + ",az:" + instance.getZoneId());
                    if (instance.getOperationLocks() != null) {
                        for (DescribeInstancesResponse.Instance.LockReason lockReason : instance.getOperationLocks()) {
                            // 如果实例被锁定，输出指定实例ID以及对应的锁定类型。
                            System.out.println("instance:" + instance.getInstanceId() + "-->lockReason:" + lockReason.getLockReason() + ",vmStatus:" + instance.getStatus());
                            if ("Recycling".equals(lockReason.getLockReason())) {
                                // 输出即将被回收的实例ID信息。
                                System.out.println("spot instance will be recycled immediately, instance id:" + instance.getInstanceId());
                                allInstances.remove(instance.getInstanceId());
                            }
                        }
                    }
                }
                // 如果抢占式实例还未被锁定，将每隔两分钟查询一次。
                System.out.print("try describeInstances again later ...");
                Thread.sleep(2 * 60 * 1000);
            } else {
                break;
            }
        }
    }
}

// 初始化DefaultAcsClient实例的类。
class OpenApiCaller{
    IClientProfile profile;
    IAcsClient client;
    public OpenApiCaller() {
        // 请确保代码运行环境设置了环境变量ALIBABA_CLOUD_ACCESS_KEY_ID和ALIBABA_CLOUD_ACCESS_KEY_SECRET。
        // 工程代码泄露可能会导致AccessKey泄露，并威胁账号下所有资源的安全性。以下代码示例使用环境变量获取AccessKey的方式进行调用，建议使用更安全的STS方式。
        profile = DefaultProfile.getProfile("cn-hangzhou", System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"), System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"));
        client = new DefaultAcsClient(profile);
    }

    public  <T extends AcsResponse> T doAction(AcsRequest<T> var1) {
        try {
            return  client.getAcsResponse(var1);
        } catch (Throwable e) {
            e.printStackTrace();
            return null;
        }
    }
}

触发回收时输出结果如下：

result:instance:i-bp1i9c3qiv1qs6nc****,az:cn-hangzhou-i
instance:i-bp1i9c3qiv1qs6nc****-->lockReason:Recycling,vmStatus:Stopped
spot instance will be recycled immediately, instance id:i-bp1i9c3qiv1qs6nc****