(Delphi DLL) DynamoDB - DeleteTable

The DeleteTable operation deletes a table and all of its items. After a DeleteTable request, the specified table is in the DELETING state until DynamoDB completes the deletion.

For more information, see https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_DeleteTable.html

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, AuthAws, Rest, JsonObject, StringBuilder;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: HCkRest;
success: Boolean;
authAws: HCkAuthAws;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
json: HCkJsonObject;
sbRequestBody: HCkStringBuilder;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
jsonResponse: HCkJsonObject;
TableDescriptionTableArn: PWideChar;
TableDescriptionItemCount: Integer;
TableDescriptionProvisionedThroughputNumberOfDecreasesToday: Integer;
TableDescriptionProvisionedThroughputReadCapacityUnits: Integer;
TableDescriptionProvisionedThroughputWriteCapacityUnits: Integer;
TableDescriptionTableName: PWideChar;
TableDescriptionTableSizeBytes: Integer;
TableDescriptionTableStatus: PWideChar;

begin
rest := CkRest_Create();

// Implements the following CURL command:

// curl -X POST https://dynamodb.us-west-2.amazonaws.com/ \
//   -H "Accept-Encoding: identity" \
//   -H "Content-Type: application/x-amz-json-1.0" \
//   -H "Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<Headers>, Signature=<Signature>" \
//   -H "X-Amz-Date: <Date>" \
//   -H "X-Amz-Target: DynamoDB_20120810.DeleteTable" \
//   -d '{
//     "TableName": "Thread"
// }'

// Use the following online tool to generate REST code from a CURL command
// Convert a cURL Command to REST Source Code

authAws := CkAuthAws_Create();
CkAuthAws_putAccessKey(authAws,'AWS_ACCESS_KEY');
CkAuthAws_putSecretKey(authAws,'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.)
CkAuthAws_putRegion(authAws,'us-west-2');
CkAuthAws_putServiceName(authAws,'dynamodb');
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
CkRest_SetAuthAws(rest,authAws);

// URL: https://dynamodb.us-west-2.amazonaws.com/
bTls := True;
port := 443;
bAutoReconnect := True;
// Don't forget to change the region domain (us-west-2.amazonaws.com) to your particular region.
success := CkRest_Connect(rest,'dynamodb.us-west-2.amazonaws.com',port,bTls,bAutoReconnect);
if (success <> True) then
  begin
    Memo1.Lines.Add('ConnectFailReason: ' + IntToStr(CkRest_getConnectFailReason(rest)));
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

// Note: The above code does not need to be repeatedly called for each REST request.
// The rest object can be setup once, and then many requests can be sent.  Chilkat will automatically
// reconnect within a FullRequest* method as needed.  It is only the very first connection that is explicitly
// made via the Connect method.

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

// The following JSON is sent in the request body.

// {
//   "TableName": "Thread"
// }

json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'TableName','Thread');

CkRest_AddHeader(rest,'Content-Type','application/x-amz-json-1.0');
CkRest_AddHeader(rest,'X-Amz-Target','DynamoDB_20120810.DeleteTable');
CkRest_AddHeader(rest,'Accept-Encoding','identity');

sbRequestBody := CkStringBuilder_Create();
CkJsonObject_EmitSb(json,sbRequestBody);
sbResponseBody := CkStringBuilder_Create();
success := CkRest_FullRequestSb(rest,'POST','/',sbRequestBody,sbResponseBody);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;
respStatusCode := CkRest_getResponseStatusCode(rest);
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkRest__responseHeader(rest));
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(CkStringBuilder__getAsString(sbResponseBody));
    Exit;
  end;

jsonResponse := CkJsonObject_Create();
CkJsonObject_LoadSb(jsonResponse,sbResponseBody);

CkJsonObject_putEmitCompact(jsonResponse,False);
Memo1.Lines.Add(CkJsonObject__emit(jsonResponse));

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {
//   "TableDescription": {
//     "TableArn": "arn:aws:dynamodb:us-west-2:123456789012:table/Thread",
//     "ItemCount": 0,
//     "ProvisionedThroughput": {
//       "NumberOfDecreasesToday": 0,
//       "ReadCapacityUnits": 5,
//       "WriteCapacityUnits": 5
//     },
//     "TableName": "Thread",
//     "TableSizeBytes": 0,
//     "TableStatus": "DELETING"
//   }
// }

// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

TableDescriptionTableArn := CkJsonObject__stringOf(jsonResponse,'TableDescription.TableArn');
TableDescriptionItemCount := CkJsonObject_IntOf(jsonResponse,'TableDescription.ItemCount');
TableDescriptionProvisionedThroughputNumberOfDecreasesToday := CkJsonObject_IntOf(jsonResponse,'TableDescription.ProvisionedThroughput.NumberOfDecreasesToday');
TableDescriptionProvisionedThroughputReadCapacityUnits := CkJsonObject_IntOf(jsonResponse,'TableDescription.ProvisionedThroughput.ReadCapacityUnits');
TableDescriptionProvisionedThroughputWriteCapacityUnits := CkJsonObject_IntOf(jsonResponse,'TableDescription.ProvisionedThroughput.WriteCapacityUnits');
TableDescriptionTableName := CkJsonObject__stringOf(jsonResponse,'TableDescription.TableName');
TableDescriptionTableSizeBytes := CkJsonObject_IntOf(jsonResponse,'TableDescription.TableSizeBytes');
TableDescriptionTableStatus := CkJsonObject__stringOf(jsonResponse,'TableDescription.TableStatus');

CkRest_Dispose(rest);
CkAuthAws_Dispose(authAws);
CkJsonObject_Dispose(json);
CkStringBuilder_Dispose(sbRequestBody);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jsonResponse);

end;