1. 安装AWS SDK for Java

在项目的pom.xml文件中添加以下依赖项：

    com.amazonaws
    aws-java-sdk
    1.11.886

2. 更新ElasticsearchIO版本

将ElasticsearchIO版本升级到2.18.0或以上版本。

    org.apache.beam
    beam-sdks-java-io-elasticsearch
    2.28.0

3. 使用AWS4签名

由于OpenSearch使用的是AWS签名V4，因此需要将ElasticsearchIO配置为使用AWS4签名。

ClientConfiguration clientConfiguration = new ClientConfiguration();
clientConfiguration.setSignerOverride("AWS4SignerType");
ElasticsearchIO.ConnectionConfiguration connectionConfiguration =
                ElasticsearchIO.ConnectionConfiguration.create(endPoint, indexName)
                        .withUsernameAndPassword(username, password)
                        .withClientConfiguration(clientConfiguration);

4. 添加AWS访问密钥

提供AWS访问密钥，以便在请求时进行身份验证。

AmazonHttpClient httpClient = new AmazonHttpClient(new ClientConfiguration());
AWS4Signer signer = new AWS4Signer();
signer.setServiceName("es");
signer.setRegionName("us-east-1");
Request request = new DefaultRequest<>(new ElasticsearchIORequestSigner());
request.setEndpoint(URI.create("AWS Opensearch URL"));
request.setHttpMethod(HttpMethodName.GET);
request.setHeaders(new HashMap<>());
request.getContent();
Map headers = request.getHeaders();
headers.put("Host", "");
headers.put("Content-Type", "application/json");
signer.sign(request, new AWSCredentials() {
    @Override
    public String getAWSAccessKeyId() {
        return "";
    }

    @Override
    public String getAWSSecretKey() {
        return "";
    }
});

Response httpResponse = httpClient.execute