Chilkat Online Tools

ListTableMetadata Java Example

Athena

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRest rest = new CkRest();
    boolean success;

    CkAuthAws authAws = new CkAuthAws();
    authAws.put_AccessKey("AWS_ACCESS_KEY");
    authAws.put_SecretKey("AWS_SECRET_KEY");

    // Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
    authAws.put_Region("us-west-2");
    authAws.put_ServiceName("athena");
    // SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    rest.SetAuthAws(authAws);

    // URL: https://athena.us-west-2.amazonaws.com/
    // Use the same region as specified above.
    success = rest.Connect("athena.us-west-2.amazonaws.com",443,true,true);
    if (success != true) {
        System.out.println("ConnectFailReason: " + rest.get_ConnectFailReason());
        System.out.println(rest.lastErrorText());
        return;
        }

    // The following code creates the JSON request body.
    // The JSON created by this code is shown below.

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    CkJsonObject json = new CkJsonObject();
    json.UpdateString("CatalogName","string");
    json.UpdateString("DatabaseName","string");
    json.UpdateString("Expression","string");
    json.UpdateInt("MaxResults",123);
    json.UpdateString("NextToken","string");

    // The JSON request body created by the above code:

    // {
    //   "CatalogName": "string",
    //   "DatabaseName": "string",
    //   "Expression": "string",
    //   "MaxResults": number,
    //   "NextToken": "string"
    // }

    rest.AddHeader("Content-Type","application/x-amz-json-1.1");
    rest.AddHeader("X-Amz-Target","AmazonAthena.ListTableMetadata");

    CkStringBuilder sbRequestBody = new CkStringBuilder();
    json.EmitSb(sbRequestBody);
    CkStringBuilder sbResponseBody = new CkStringBuilder();
    success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    int respStatusCode = rest.get_ResponseStatusCode();
    System.out.println("response status code = " + respStatusCode);
    if (respStatusCode != 200) {
        System.out.println("Response Header:");
        System.out.println(rest.responseHeader());
        System.out.println("Response Body:");
        System.out.println(sbResponseBody.getAsString());
        return;
        }

    CkJsonObject jResp = new CkJsonObject();
    jResp.LoadSb(sbResponseBody);

    // The following code parses the JSON response.
    // A sample JSON response is shown below the sample code.

    // Use this online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    int CreateTime;
    int LastAccessTime;
    String Name;
    String v_String;
    String TableType;
    int j;
    int count_j;
    String Comment;
    String v_Type;

    String NextToken = jResp.stringOf("NextToken");
    int i = 0;
    int count_i = jResp.SizeOfArray("TableMetadataList");
    while (i < count_i) {
        jResp.put_I(i);
        CreateTime = jResp.IntOf("TableMetadataList[i].CreateTime");
        LastAccessTime = jResp.IntOf("TableMetadataList[i].LastAccessTime");
        Name = jResp.stringOf("TableMetadataList[i].Name");
        v_String = jResp.stringOf("TableMetadataList[i].Parameters.string");
        TableType = jResp.stringOf("TableMetadataList[i].TableType");
        j = 0;
        count_j = jResp.SizeOfArray("TableMetadataList[i].Columns");
        while (j < count_j) {
            jResp.put_J(j);
            Comment = jResp.stringOf("TableMetadataList[i].Columns[j].Comment");
            Name = jResp.stringOf("TableMetadataList[i].Columns[j].Name");
            v_Type = jResp.stringOf("TableMetadataList[i].Columns[j].Type");
            j = j+1;
            }

        j = 0;
        count_j = jResp.SizeOfArray("TableMetadataList[i].PartitionKeys");
        while (j < count_j) {
            jResp.put_J(j);
            Comment = jResp.stringOf("TableMetadataList[i].PartitionKeys[j].Comment");
            Name = jResp.stringOf("TableMetadataList[i].PartitionKeys[j].Name");
            v_Type = jResp.stringOf("TableMetadataList[i].PartitionKeys[j].Type");
            j = j+1;
            }

        i = i+1;
        }

    // A sample JSON response body parsed by the above code:

    // {
    //   "NextToken": "string",
    //   "TableMetadataList": [
    //     {
    //       "Columns": [
    //         {
    //           "Comment": "string",
    //           "Name": "string",
    //           "Type": "string"
    //         }
    //       ],
    //       "CreateTime": number,
    //       "LastAccessTime": number,
    //       "Name": "string",
    //       "Parameters": {
    //         "string": "string"
    //       },
    //       "PartitionKeys": [
    //         {
    //           "Comment": "string",
    //           "Name": "string",
    //           "Type": "string"
    //         }
    //       ],
    //       "TableType": "string"
    //     }
    //   ]
    // }
  }
}