Chilkat Online Tools

GetQueryResults 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.UpdateInt("MaxResults",123);
    json.UpdateString("NextToken","string");
    json.UpdateString("QueryExecutionId","string");

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

    // {
    //   "MaxResults": number,
    //   "NextToken": "string",
    //   "QueryExecutionId": "string"
    // }

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

    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 CaseSensitive;
    String CatalogName;
    String Label;
    String Name;
    String Nullable;
    int Precision;
    int Scale;
    String SchemaName;
    String TableName;
    String v_Type;
    int j;
    int count_j;
    String VarCharValue;

    String NextToken = jResp.stringOf("NextToken");
    int UpdateCount = jResp.IntOf("UpdateCount");
    int i = 0;
    int count_i = jResp.SizeOfArray("ResultSet.ResultSetMetadata.ColumnInfo");
    while (i < count_i) {
        jResp.put_I(i);
        CaseSensitive = jResp.IntOf("ResultSet.ResultSetMetadata.ColumnInfo[i].CaseSensitive");
        CatalogName = jResp.stringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].CatalogName");
        Label = jResp.stringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Label");
        Name = jResp.stringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Name");
        Nullable = jResp.stringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Nullable");
        Precision = jResp.IntOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Precision");
        Scale = jResp.IntOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Scale");
        SchemaName = jResp.stringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].SchemaName");
        TableName = jResp.stringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].TableName");
        v_Type = jResp.stringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Type");
        i = i+1;
        }

    i = 0;
    count_i = jResp.SizeOfArray("ResultSet.Rows");
    while (i < count_i) {
        jResp.put_I(i);
        j = 0;
        count_j = jResp.SizeOfArray("ResultSet.Rows[i].Data");
        while (j < count_j) {
            jResp.put_J(j);
            VarCharValue = jResp.stringOf("ResultSet.Rows[i].Data[j].VarCharValue");
            j = j+1;
            }

        i = i+1;
        }

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

    // {
    //   "NextToken": "string",
    //   "ResultSet": {
    //     "ResultSetMetadata": {
    //       "ColumnInfo": [
    //         {
    //           "CaseSensitive": boolean,
    //           "CatalogName": "string",
    //           "Label": "string",
    //           "Name": "string",
    //           "Nullable": "string",
    //           "Precision": number,
    //           "Scale": number,
    //           "SchemaName": "string",
    //           "TableName": "string",
    //           "Type": "string"
    //         }
    //       ]
    //     },
    //     "Rows": [
    //       {
    //         "Data": [
    //           {
    //             "VarCharValue": "string"
    //           }
    //         ]
    //       }
    //     ]
    //   },
    //   "UpdateCount": number
    // }
  }
}