使用 CloudWatch 警报 - AWS SDK for Java 1.x
创建警报列出警报删除警报更多信息

自2024年7月31日起， AWS SDK for Java 1.x已进入维护模式，并将于2025年12月31日end-of-support上线。我们建议您迁移到AWS SDK for Java 2.x以继续接收新功能、可用性改进和安全更新。

本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

使用 CloudWatch 警报

创建警报

要根据 CloudWatch 指标创建警报，请使用已填充警报条件的 PutMetricAlarmRequest 调用 AmazonCloudWatchClient 的 putMetricAlarm 方法。

导入 

import com.amazonaws.services.cloudwatch.AmazonCloudWatch;
import com.amazonaws.services.cloudwatch.AmazonCloudWatchClientBuilder;
import com.amazonaws.services.cloudwatch.model.ComparisonOperator;
import com.amazonaws.services.cloudwatch.model.Dimension;
import com.amazonaws.services.cloudwatch.model.PutMetricAlarmRequest;
import com.amazonaws.services.cloudwatch.model.PutMetricAlarmResult;
import com.amazonaws.services.cloudwatch.model.StandardUnit;
import com.amazonaws.services.cloudwatch.model.Statistic;

代码 

final AmazonCloudWatch cw =
    AmazonCloudWatchClientBuilder.defaultClient();

Dimension dimension = new Dimension()
    .withName("InstanceId")
    .withValue(instanceId);

PutMetricAlarmRequest request = new PutMetricAlarmRequest()
    .withAlarmName(alarmName)
    .withComparisonOperator(
        ComparisonOperator.GreaterThanThreshold)
    .withEvaluationPeriods(1)
    .withMetricName("CPUUtilization")
    .withNamespace("{AWS}/EC2")
    .withPeriod(60)
    .withStatistic(Statistic.Average)
    .withThreshold(70.0)
    .withActionsEnabled(false)
    .withAlarmDescription(
        "Alarm when server CPU utilization exceeds 70%")
    .withUnit(StandardUnit.Seconds)
    .withDimensions(dimension);

PutMetricAlarmResult response = cw.putMetricAlarm(request);

列出警报

要列出您已创建的 CloudWatch 警报，请使用您可用来设置结果选项的 DescribeAlarmsRequest 调用 AmazonCloudWatchClient 的 describeAlarms 方法。

导入 

import com.amazonaws.services.cloudwatch.AmazonCloudWatch;
import com.amazonaws.services.cloudwatch.AmazonCloudWatchClientBuilder;
import com.amazonaws.services.cloudwatch.model.DescribeAlarmsRequest;
import com.amazonaws.services.cloudwatch.model.DescribeAlarmsResult;
import com.amazonaws.services.cloudwatch.model.MetricAlarm;

代码 

final AmazonCloudWatch cw =
    AmazonCloudWatchClientBuilder.defaultClient();

boolean done = false;
DescribeAlarmsRequest request = new DescribeAlarmsRequest();

while(!done) {

    DescribeAlarmsResult response = cw.describeAlarms(request);

    for(MetricAlarm alarm : response.getMetricAlarms()) {
        System.out.printf("Retrieved alarm %s", alarm.getAlarmName());
    }

    request.setNextToken(response.getNextToken());

    if(response.getNextToken() == null) {
        done = true;
    }
}

警报列表可以通过在 describeAlarms 返回的 DescribeAlarmsResult 中调用 getMetricAlarms 获得。

结果可以分页。要检索下一批结果，请在原始请求对象中使用 DescribeAlarmsResult 对象的 getNextToken 方法的返回值调用 setNextToken，并将已修改的请求对象传回对 describeAlarms 的另一个调用。

注意

您还可以使用 AmazonCloudWatchClient 的 describeAlarmsForMetric 方法检索特定指标的警报。它的使用类似于 describeAlarms。

删除警报

要删除 CloudWatch 警报，请使用 DeleteAlarmsRequest（包含您要删除的一个或更多警报名称）调用 AmazonCloudWatchClient 的 deleteAlarms 方法。

导入 

import com.amazonaws.services.cloudwatch.AmazonCloudWatch;
import com.amazonaws.services.cloudwatch.AmazonCloudWatchClientBuilder;
import com.amazonaws.services.cloudwatch.model.DeleteAlarmsRequest;
import com.amazonaws.services.cloudwatch.model.DeleteAlarmsResult;

代码 

final AmazonCloudWatch cw =
    AmazonCloudWatchClientBuilder.defaultClient();

DeleteAlarmsRequest request = new DeleteAlarmsRequest()
    .withAlarmNames(alarm_name);

DeleteAlarmsResult response = cw.deleteAlarms(request);

更多信息