Reference Example

Updated on 2025-02-14 GMT+08:00

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After the development and running environments are prepared, you can develop samples as required.

The following is an example of using LakeFormation Java SDK to develop programs:

(The following code describes how to initialize the SDK, create a LakeFormationClient instance, create a request, add parameters, and query the catalog list.)

package com.huawei.cloud.dalf.lakecat.examples;

import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ClientRequestException;
import com.huaweicloud.sdk.core.exception.ServerResponseException;
import com.huaweicloud.sdk.core.http.HttpConfig;
import com.huaweicloud.sdk.lakeformation.v1.LakeFormationClient;
import com.huaweicloud.sdk.lakeformation.v1.model.ListCatalogsRequest;
import com.huaweicloud.sdk.lakeformation.v1.model.ListCatalogsResponse;

import java.util.ArrayList;
import java.util.List;

public class LakeFormationExample {
    public static void main(String[] args) {
        // The getAk() and getSk() methods need to be implemented by yourself. You can obtain the AK/SK from the configuration item or other locations.
        // Do not hard-code AK and SK in codes.
        String ak = getAk();
        String sk = getSk();

        // projectId: project ID
        String projectId = "{******your project id******}";

        // 1. Initialize the SDK.
        HttpConfig config = HttpConfig.getDefaultHttpConfig();
        config.withIgnoreSSLVerification(true);
        List<String> endpoints = new ArrayList<>();
        endpoints.add("lakeformation.lakecat.com");
        BasicCredentials basicCredentials = new BasicCredentials().withAk(ak).withSk(sk).withProjectId(projectId);

        // 2. Create a LakeFormationClient instance.
        LakeFormationClient client = LakeFormationClient.newBuilder()
            .withHttpConfig(config)
            .withCredential(basicCredentials)
            .withEndpoints(endpoints)
            .build();

        // 3. Create a request and add parameters.
        ListCatalogsRequest listCatalogsRequest =
            new ListCatalogsRequest().withInstanceId("{******your instance id******}");

        // 4. Query the catalog list.
        try {
            ListCatalogsResponse response = client.listCatalogs(listCatalogsRequest);
            System.out.println(response.getHttpStatusCode());
            System.out.println(response);
        } catch (ClientRequestException | ServerResponseException e) {
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getMessage());
        }
    }
}

Parent topic: Using LakeFormation Java SDK to Develop Programs

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