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# 与 Amazon SDK `PutSubscriptionFilter` 配合使用
<a name="example_cloudwatch-logs_PutSubscriptionFilter_section"></a>

以下代码示例演示如何使用 `PutSubscriptionFilter`。

------
#### [ C\+\+ ]

**SDK for C\+\+**  
 还有更多相关信息 GitHub。在 [Amazon 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/cloudwatch-logs#code-examples) 中查找完整示例，了解如何进行设置和运行。
包含所需的文件。  

```
#include <aws/core/Aws.h>
#include <aws/logs/CloudWatchLogsClient.h>
#include <aws/logs/model/PutSubscriptionFilterRequest.h>
#include <aws/core/utils/Outcome.h>
#include <iostream>
```
创建订阅筛选条件。  

```
        Aws::CloudWatchLogs::CloudWatchLogsClient cwl;
        Aws::CloudWatchLogs::Model::PutSubscriptionFilterRequest request;
        request.SetFilterName(filter_name);
        request.SetFilterPattern(filter_pattern);
        request.SetLogGroupName(log_group);
        request.SetDestinationArn(dest_arn);
        auto outcome = cwl.PutSubscriptionFilter(request);
        if (!outcome.IsSuccess())
        {
            std::cout << "Failed to create CloudWatch logs subscription filter "
                << filter_name << ": " << outcome.GetError().GetMessage() <<
                std::endl;
        }
        else
        {
            std::cout << "Successfully created CloudWatch logs subscription " <<
                "filter " << filter_name << std::endl;
        }
```
+  有关 API 的详细信息，请参阅 *适用于 C\+\+ 的 Amazon SDK API 参考[PutSubscriptionFilter](https://docs.amazonaws.cn/goto/SdkForCpp/logs-2014-03-28/PutSubscriptionFilter)*中的。

------
#### [ Java ]

**适用于 Java 的 SDK 2.x**  
 还有更多相关信息 GitHub。在 [Amazon 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/cloudwatch-logs#code-examples)中查找完整示例，了解如何进行设置和运行。

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.cloudwatchlogs.CloudWatchLogsClient;
import software.amazon.awssdk.services.cloudwatchlogs.model.CloudWatchLogsException;
import software.amazon.awssdk.services.cloudwatchlogs.model.PutSubscriptionFilterRequest;

/**
 * Before running this code example, you need to grant permission to CloudWatch
 * Logs the right to execute your Lambda function.
 * To perform this task, you can use this CLI command:
 *
 * aws lambda add-permission --function-name "lamda1" --statement-id "lamda1"
 * --principal "logs.us-west-2.amazonaws.com" --action "lambda:InvokeFunction"
 * --source-arn "arn:aws:logs:us-west-2:111111111111:log-group:testgroup:*"
 * --source-account "111111111111"
 *
 * Make sure you replace the function name with your function name and replace
 * '111111111111' with your account details.
 * For more information, see "Subscription Filters with AWS Lambda" in the
 * Amazon CloudWatch Logs Guide.
 *
 *
 * Also, before running this Java V2 code example,set up your development
 * environment,including your credentials.
 *
 * For more information,see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 *
 */

public class PutSubscriptionFilter {
    public static void main(String[] args) {
        final String usage = """

                Usage:
                  <filter> <pattern> <logGroup> <functionArn>\s

                Where:
                  filter - A filter name (for example, myfilter).
                  pattern - A filter pattern (for example, ERROR).
                  logGroup - A log group name (testgroup).
                  functionArn - An AWS Lambda function ARN (for example, arn:aws:lambda:us-west-2:111111111111:function:lambda1) .
                """;

        if (args.length != 4) {
            System.out.println(usage);
            System.exit(1);
        }

        String filter = args[0];
        String pattern = args[1];
        String logGroup = args[2];
        String functionArn = args[3];
        Region region = Region.US_WEST_2;
        CloudWatchLogsClient cwl = CloudWatchLogsClient.builder()
                .region(region)
                .build();

        putSubFilters(cwl, filter, pattern, logGroup, functionArn);
        cwl.close();
    }

    public static void putSubFilters(CloudWatchLogsClient cwl,
            String filter,
            String pattern,
            String logGroup,
            String functionArn) {

        try {
            PutSubscriptionFilterRequest request = PutSubscriptionFilterRequest.builder()
                    .filterName(filter)
                    .filterPattern(pattern)
                    .logGroupName(logGroup)
                    .destinationArn(functionArn)
                    .build();

            cwl.putSubscriptionFilter(request);
            System.out.printf(
                    "Successfully created CloudWatch logs subscription filter %s",
                    filter);

        } catch (CloudWatchLogsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}
```
+  有关 API 的详细信息，请参阅 *Amazon SDK for Java 2.x API 参考[PutSubscriptionFilter](https://docs.amazonaws.cn/goto/SdkForJavaV2/logs-2014-03-28/PutSubscriptionFilter)*中的。

------
#### [ JavaScript ]

**适用于 JavaScript (v3) 的软件开发工具包**  
 还有更多相关信息 GitHub。在 [Amazon 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javascriptv3/example_code/cloudwatch-logs#code-examples)中查找完整示例，了解如何进行设置和运行。

```
import { PutSubscriptionFilterCommand } from "@aws-sdk/client-cloudwatch-logs";
import { client } from "../libs/client.js";

const run = async () => {
  const command = new PutSubscriptionFilterCommand({
    // An ARN of a same-account Kinesis stream, Kinesis Firehose
    // delivery stream, or Lambda function.
    // https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/SubscriptionFilters.html
    destinationArn: process.env.CLOUDWATCH_LOGS_DESTINATION_ARN,

    // A name for the filter.
    filterName: process.env.CLOUDWATCH_LOGS_FILTER_NAME,

    // A filter pattern for subscribing to a filtered stream of log events.
    // https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/FilterAndPatternSyntax.html
    filterPattern: process.env.CLOUDWATCH_LOGS_FILTER_PATTERN,

    // The name of the log group. Messages in this group matching the filter pattern
    // will be sent to the destination ARN.
    logGroupName: process.env.CLOUDWATCH_LOGS_LOG_GROUP,
  });

  try {
    return await client.send(command);
  } catch (err) {
    console.error(err);
  }
};

export default run();
```
+  有关 API 的详细信息，请参阅 *适用于 JavaScript 的 Amazon SDK API 参考[PutSubscriptionFilter](https://docs.amazonaws.cn/AWSJavaScriptSDK/v3/latest/client/cloudwatch-logs/command/PutSubscriptionFilterCommand)*中的。

**适用于 JavaScript (v2) 的软件开发工具包**  
 还有更多相关信息 GitHub。在 [Amazon 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javascript/example_code/cloudwatch-logs#code-examples)中查找完整示例，了解如何进行设置和运行。

```
// Load the AWS SDK for Node.js
var AWS = require("aws-sdk");
// Set the region
AWS.config.update({ region: "REGION" });

// Create the CloudWatchLogs service object
var cwl = new AWS.CloudWatchLogs({ apiVersion: "2014-03-28" });

var params = {
  destinationArn: "LAMBDA_FUNCTION_ARN",
  filterName: "FILTER_NAME",
  filterPattern: "ERROR",
  logGroupName: "LOG_GROUP",
};

cwl.putSubscriptionFilter(params, function (err, data) {
  if (err) {
    console.log("Error", err);
  } else {
    console.log("Success", data);
  }
});
```
+  有关更多信息，请参阅《适用于 JavaScript 的 Amazon SDK 开发人员指南》[https://docs.amazonaws.cn/sdk-for-javascript/v2/developer-guide/cloudwatch-examples-subscriptions.html#cloudwatch-examples-subscriptions-creating](https://docs.amazonaws.cn/sdk-for-javascript/v2/developer-guide/cloudwatch-examples-subscriptions.html#cloudwatch-examples-subscriptions-creating)。
+  有关 API 的详细信息，请参阅 *适用于 JavaScript 的 Amazon SDK API 参考[PutSubscriptionFilter](https://docs.amazonaws.cn/goto/AWSJavaScriptSDK/logs-2014-03-28/PutSubscriptionFilter)*中的。

------

有关 S Amazon DK 开发者指南和代码示例的完整列表，请参阅[在 Amazon SDK 中使用 CloudWatch 日志](sdk-general-information-section.md)。本主题还包括有关入门的信息以及有关先前的 SDK 版本的详细信息。