Chilkat Examples

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Objective-C Web API Examples

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(Objective-C) DynamoDB - CreateTable

The CreateTable operation adds a new table to your account. In an AWS account, table names must be unique within each Region. That is, you can have two tables with same name if you create the tables in different Regions.

CreateTable is an asynchronous operation. Upon receiving a CreateTable request, DynamoDB immediately returns a response with a TableStatus of CREATING. After the table is created, DynamoDB sets the TableStatus to ACTIVE. You can perform read and write operations only on an ACTIVE table.

You can use the DescribeTable action to check the table status.

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

Chilkat Objective-C Library Downloads

MAC OS X (Cocoa) Libs

iOS Libs

#import <CkoRest.h>
#import <CkoAuthAws.h>
#import <CkoJsonObject.h>
#import <CkoStringBuilder.h>
#import <NSString.h>

CkoRest *rest = [[CkoRest alloc] init];
BOOL success;

// 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.CreateTable" \
//   -d '{
//     "AttributeDefinitions": [
//         {
//             "AttributeName": "ForumName",
//             "AttributeType": "S"
//         },
//         {
//             "AttributeName": "Subject",
//             "AttributeType": "S"
//         },
//         {
//             "AttributeName": "LastPostDateTime",
//             "AttributeType": "S"
//         }
//     ],
//     "TableName": "Thread",
//     "KeySchema": [
//         {
//             "AttributeName": "ForumName",
//             "KeyType": "HASH"
//         },
//         {
//             "AttributeName": "Subject",
//             "KeyType": "RANGE"
//         }
//     ],
//     "LocalSecondaryIndexes": [
//         {
//             "IndexName": "LastPostIndex",
//             "KeySchema": [
//                 {
//                     "AttributeName": "ForumName",
//                     "KeyType": "HASH"
//                 },
//                 {
//                     "AttributeName": "LastPostDateTime",
//                     "KeyType": "RANGE"
//                 }
//             ],
//             "Projection": {
//                 "ProjectionType": "KEYS_ONLY"
//             }
//         }
//     ],
//     "ProvisionedThroughput": {
//         "ReadCapacityUnits": 5,
//         "WriteCapacityUnits": 5
//     },
//     "Tags": [ 
//       { 
//          "Key": "Owner",
//          "Value": "BlueTeam"
//       }
//    ]
// }'

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

CkoAuthAws *authAws = [[CkoAuthAws alloc] init];
authAws.AccessKey = @"AWS_ACCESS_KEY";
authAws.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.Region = @"us-west-2";
authAws.ServiceName = @"dynamodb";
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
[rest SetAuthAws: authAws];

// URL: https://dynamodb.us-west-2.amazonaws.com/
BOOL bTls = YES;
int port = 443;
BOOL bAutoReconnect = YES;
// Don't forget to change the region domain (us-west-2.amazonaws.com) to your particular region.
success = [rest Connect: @"dynamodb.us-west-2.amazonaws.com" port: [NSNumber numberWithInt: port] tls: bTls autoReconnect: bAutoReconnect];
if (success != YES) {
    NSLog(@"%@%d",@"ConnectFailReason: ",[rest.ConnectFailReason intValue]);
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// 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.

// {
//   "AttributeDefinitions": [
//     {
//       "AttributeName": "ForumName",
//       "AttributeType": "S"
//     },
//     {
//       "AttributeName": "Subject",
//       "AttributeType": "S"
//     },
//     {
//       "AttributeName": "LastPostDateTime",
//       "AttributeType": "S"
//     }
//   ],
//   "TableName": "Thread",
//   "KeySchema": [
//     {
//       "AttributeName": "ForumName",
//       "KeyType": "HASH"
//     },
//     {
//       "AttributeName": "Subject",
//       "KeyType": "RANGE"
//     }
//   ],
//   "LocalSecondaryIndexes": [
//     {
//       "IndexName": "LastPostIndex",
//       "KeySchema": [
//         {
//           "AttributeName": "ForumName",
//           "KeyType": "HASH"
//         },
//         {
//           "AttributeName": "LastPostDateTime",
//           "KeyType": "RANGE"
//         }
//       ],
//       "Projection": {
//         "ProjectionType": "KEYS_ONLY"
//       }
//     }
//   ],
//   "ProvisionedThroughput": {
//     "ReadCapacityUnits": 5,
//     "WriteCapacityUnits": 5
//   },
//   "Tags": [
//     {
//       "Key": "Owner",
//       "Value": "BlueTeam"
//     }
//   ]
// }

CkoJsonObject *json = [[CkoJsonObject alloc] init];
int i = 0;
json.I = [NSNumber numberWithInt: i];
[json UpdateString: @"AttributeDefinitions[i].AttributeName" value: @"ForumName"];
[json UpdateString: @"AttributeDefinitions[i].AttributeType" value: @"S"];
i = i + 1;
json.I = [NSNumber numberWithInt: i];
[json UpdateString: @"AttributeDefinitions[i].AttributeName" value: @"Subject"];
[json UpdateString: @"AttributeDefinitions[i].AttributeType" value: @"S"];
i = i + 1;
json.I = [NSNumber numberWithInt: i];
[json UpdateString: @"AttributeDefinitions[i].AttributeName" value: @"LastPostDateTime"];
[json UpdateString: @"AttributeDefinitions[i].AttributeType" value: @"S"];
[json UpdateString: @"TableName" value: @"Thread"];
i = 0;
json.I = [NSNumber numberWithInt: i];
[json UpdateString: @"KeySchema[i].AttributeName" value: @"ForumName"];
[json UpdateString: @"KeySchema[i].KeyType" value: @"HASH"];
i = i + 1;
json.I = [NSNumber numberWithInt: i];
[json UpdateString: @"KeySchema[i].AttributeName" value: @"Subject"];
[json UpdateString: @"KeySchema[i].KeyType" value: @"RANGE"];

i = 0;
json.I = [NSNumber numberWithInt: i];
int j = 0;
json.J = [NSNumber numberWithInt: j];
[json UpdateString: @"LocalSecondaryIndexes[i].IndexName" value: @"LastPostIndex"];
[json UpdateString: @"LocalSecondaryIndexes[i].KeySchema[j].AttributeName" value: @"ForumName"];
[json UpdateString: @"LocalSecondaryIndexes[i].KeySchema[j].KeyType" value: @"HASH"];
j = j + 1;
json.J = [NSNumber numberWithInt: j];
[json UpdateString: @"LocalSecondaryIndexes[i].KeySchema[j].AttributeName" value: @"LastPostDateTime"];
[json UpdateString: @"LocalSecondaryIndexes[i].KeySchema[j].KeyType" value: @"RANGE"];
[json UpdateString: @"LocalSecondaryIndexes[i].Projection.ProjectionType" value: @"KEYS_ONLY"];
[json UpdateInt: @"ProvisionedThroughput.ReadCapacityUnits" value: [NSNumber numberWithInt: 5]];
[json UpdateInt: @"ProvisionedThroughput.WriteCapacityUnits" value: [NSNumber numberWithInt: 5]];
[json UpdateString: @"Tags[0].Key" value: @"Owner"];
[json UpdateString: @"Tags[0].Value" value: @"BlueTeam"];

[rest AddHeader: @"Content-Type" value: @"application/x-amz-json-1.0"];
[rest AddHeader: @"X-Amz-Target" value: @"DynamoDB_20120810.CreateTable"];
[rest AddHeader: @"Accept-Encoding" value: @"identity"];

CkoStringBuilder *sbRequestBody = [[CkoStringBuilder alloc] init];
[json EmitSb: sbRequestBody];
CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
success = [rest FullRequestSb: @"POST" uriPath: @"/" requestBody: sbRequestBody responseBody: sbResponseBody];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

int respStatusCode = [rest.ResponseStatusCode intValue];
NSLog(@"%@%d",@"response status code = ",respStatusCode);

if (respStatusCode >= 400) {
    NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",rest.ResponseHeader);
    NSLog(@"%@",@"Response Body:");
    NSLog(@"%@",[sbResponseBody GetAsString]);
    return;
}

CkoJsonObject *jsonResponse = [[CkoJsonObject alloc] init];
[jsonResponse LoadSb: sbResponseBody];

jsonResponse.EmitCompact = NO;
NSLog(@"%@",[jsonResponse Emit]);

// Sample Response:

//  {
//     "TableDescription": {
//         "TableArn": "arn:aws:dynamodb:us-west-2:123456789012:table/Thread",
//         "AttributeDefinitions": [
//             {
//                 "AttributeName": "ForumName",
//                 "AttributeType": "S"
//             },
//             {
//                 "AttributeName": "LastPostDateTime",
//                 "AttributeType": "S"
//             },
//             {
//                 "AttributeName": "Subject",
//                 "AttributeType": "S"
//             }
//         ],
//         "CreationDateTime": 1.36372808007E9,
//         "ItemCount": 0,
//         "KeySchema": [
//             {
//                 "AttributeName": "ForumName",
//                 "KeyType": "HASH"
//             },
//             {
//                 "AttributeName": "Subject",
//                 "KeyType": "RANGE"
//             }
//         ],
//         "LocalSecondaryIndexes": [
//             {
//                 "IndexArn": "arn:aws:dynamodb:us-west-2:123456789012:table/Thread/index/LastPostIndex",
//                 "IndexName": "LastPostIndex",
//                 "IndexSizeBytes": 0,
//                 "ItemCount": 0,
//                 "KeySchema": [
//                     {
//                         "AttributeName": "ForumName",
//                         "KeyType": "HASH"
//                     },
//                     {
//                         "AttributeName": "LastPostDateTime",
//                         "KeyType": "RANGE"
//                     }
//                 ],
//                 "Projection": {
//                     "ProjectionType": "KEYS_ONLY"
//                 }
//             }
//         ],
//         "ProvisionedThroughput": {
//             "NumberOfDecreasesToday": 0,
//             "ReadCapacityUnits": 5,
//             "WriteCapacityUnits": 5
//         },
//         "TableName": "Thread",
//         "TableSizeBytes": 0,
//         "TableStatus": "CREATING"
//     }
// }

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

NSString *AttributeName = 0;
NSString *AttributeType = 0;
NSString *KeyType = 0;
NSString *IndexArn = 0;
NSString *IndexName = 0;
int IndexSizeBytes;
int ItemCount;
NSString *ProjectionProjectionType = 0;
int count_j;

NSString *TableDescriptionTableArn = [jsonResponse StringOf: @"TableDescription.TableArn"];
NSString *TableDescriptionCreationDateTime = [jsonResponse StringOf: @"TableDescription.CreationDateTime"];
int TableDescriptionItemCount = [[jsonResponse IntOf: @"TableDescription.ItemCount"] intValue];
int TableDescriptionProvisionedThroughputNumberOfDecreasesToday = [[jsonResponse IntOf: @"TableDescription.ProvisionedThroughput.NumberOfDecreasesToday"] intValue];
int TableDescriptionProvisionedThroughputReadCapacityUnits = [[jsonResponse IntOf: @"TableDescription.ProvisionedThroughput.ReadCapacityUnits"] intValue];
int TableDescriptionProvisionedThroughputWriteCapacityUnits = [[jsonResponse IntOf: @"TableDescription.ProvisionedThroughput.WriteCapacityUnits"] intValue];
NSString *TableDescriptionTableName = [jsonResponse StringOf: @"TableDescription.TableName"];
int TableDescriptionTableSizeBytes = [[jsonResponse IntOf: @"TableDescription.TableSizeBytes"] intValue];
NSString *TableDescriptionTableStatus = [jsonResponse StringOf: @"TableDescription.TableStatus"];
i = 0;
int count_i = [[jsonResponse SizeOfArray: @"TableDescription.AttributeDefinitions"] intValue];
while (i < count_i) {
    jsonResponse.I = [NSNumber numberWithInt: i];
    AttributeName = [jsonResponse StringOf: @"TableDescription.AttributeDefinitions[i].AttributeName"];
    AttributeType = [jsonResponse StringOf: @"TableDescription.AttributeDefinitions[i].AttributeType"];
    i = i + 1;
}

i = 0;
count_i = [[jsonResponse SizeOfArray: @"TableDescription.KeySchema"] intValue];
while (i < count_i) {
    jsonResponse.I = [NSNumber numberWithInt: i];
    AttributeName = [jsonResponse StringOf: @"TableDescription.KeySchema[i].AttributeName"];
    KeyType = [jsonResponse StringOf: @"TableDescription.KeySchema[i].KeyType"];
    i = i + 1;
}

i = 0;
count_i = [[jsonResponse SizeOfArray: @"TableDescription.LocalSecondaryIndexes"] intValue];
while (i < count_i) {
    jsonResponse.I = [NSNumber numberWithInt: i];
    IndexArn = [jsonResponse StringOf: @"TableDescription.LocalSecondaryIndexes[i].IndexArn"];
    IndexName = [jsonResponse StringOf: @"TableDescription.LocalSecondaryIndexes[i].IndexName"];
    IndexSizeBytes = [[jsonResponse IntOf: @"TableDescription.LocalSecondaryIndexes[i].IndexSizeBytes"] intValue];
    ItemCount = [[jsonResponse IntOf: @"TableDescription.LocalSecondaryIndexes[i].ItemCount"] intValue];
    ProjectionProjectionType = [jsonResponse StringOf: @"TableDescription.LocalSecondaryIndexes[i].Projection.ProjectionType"];
    j = 0;
    count_j = [[jsonResponse SizeOfArray: @"TableDescription.LocalSecondaryIndexes[i].KeySchema"] intValue];
    while (j < count_j) {
        jsonResponse.J = [NSNumber numberWithInt: j];
        AttributeName = [jsonResponse StringOf: @"TableDescription.LocalSecondaryIndexes[i].KeySchema[j].AttributeName"];
        KeyType = [jsonResponse StringOf: @"TableDescription.LocalSecondaryIndexes[i].KeySchema[j].KeyType"];
        j = j + 1;
    }

    i = i + 1;
}
 

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