Ruby

DynamoDB - DescribeTable

See more Amazon DynamoDB Examples

Returns information about the table, including the current status of the table, when it was created, the primary key schema, and any indexes on the table. Ruby

require 'chilkat'

success = false

rest = Chilkat::CkRest.new()

# 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.DescribeTable" \
#   -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 = Chilkat::CkAuthAws.new()
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("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/
bTls = true
port = 443
bAutoReconnect = true
# 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,bTls,bAutoReconnect)
if (success != true)
    print "ConnectFailReason: " + rest.get_ConnectFailReason().to_s() + "\n";
    print rest.lastErrorText() + "\n";
    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 = Chilkat::CkJsonObject.new()
json.UpdateString("TableName","Thread")

rest.AddHeader("Content-Type","application/x-amz-json-1.0")
rest.AddHeader("X-Amz-Target","DynamoDB_20120810.DescribeTable")
rest.AddHeader("Accept-Encoding","identity")

sbRequestBody = Chilkat::CkStringBuilder.new()
json.EmitSb(sbRequestBody)
sbResponseBody = Chilkat::CkStringBuilder.new()
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

respStatusCode = rest.get_ResponseStatusCode()
print "response status code = " + respStatusCode.to_s() + "\n";
if (respStatusCode >= 400)
    print "Response Status Code = " + respStatusCode.to_s() + "\n";
    print "Response Header:" + "\n";
    print rest.responseHeader() + "\n";
    print "Response Body:" + "\n";
    print sbResponseBody.getAsString() + "\n";
    exit
end

jsonResponse = Chilkat::CkJsonObject.new()
jsonResponse.LoadSb(sbResponseBody)

jsonResponse.put_EmitCompact(false)
print jsonResponse.emit() + "\n";

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

# {
#   "Table": {
#     "TableArn": "arn:aws:dynamodb:us-west-2:123456789012:table/Thread",
#     "AttributeDefinitions": [
#       {
#         "AttributeName": "ForumName",
#         "AttributeType": "S"
#       },
#       {
#         "AttributeName": "LastPostDateTime",
#         "AttributeType": "S"
#       },
#       {
#         "AttributeName": "Subject",
#         "AttributeType": "S"
#       }
#     ],
#     "CreationDateTime": 1.363729002358E9,
#     "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": "ACTIVE"
#   }
# }

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

TableTableArn = jsonResponse.stringOf("Table.TableArn")
TableCreationDateTime = jsonResponse.stringOf("Table.CreationDateTime")
TableItemCount = jsonResponse.IntOf("Table.ItemCount")
TableProvisionedThroughputNumberOfDecreasesToday = jsonResponse.IntOf("Table.ProvisionedThroughput.NumberOfDecreasesToday")
TableProvisionedThroughputReadCapacityUnits = jsonResponse.IntOf("Table.ProvisionedThroughput.ReadCapacityUnits")
TableProvisionedThroughputWriteCapacityUnits = jsonResponse.IntOf("Table.ProvisionedThroughput.WriteCapacityUnits")
TableTableName = jsonResponse.stringOf("Table.TableName")
TableTableSizeBytes = jsonResponse.IntOf("Table.TableSizeBytes")
TableTableStatus = jsonResponse.stringOf("Table.TableStatus")
i = 0
count_i = jsonResponse.SizeOfArray("Table.AttributeDefinitions")
while i < count_i
    jsonResponse.put_I(i)
    AttributeName = jsonResponse.stringOf("Table.AttributeDefinitions[i].AttributeName")
    AttributeType = jsonResponse.stringOf("Table.AttributeDefinitions[i].AttributeType")
    i = i + 1
end
i = 0
count_i = jsonResponse.SizeOfArray("Table.KeySchema")
while i < count_i
    jsonResponse.put_I(i)
    AttributeName = jsonResponse.stringOf("Table.KeySchema[i].AttributeName")
    KeyType = jsonResponse.stringOf("Table.KeySchema[i].KeyType")
    i = i + 1
end
i = 0
count_i = jsonResponse.SizeOfArray("Table.LocalSecondaryIndexes")
while i < count_i
    jsonResponse.put_I(i)
    IndexArn = jsonResponse.stringOf("Table.LocalSecondaryIndexes[i].IndexArn")
    IndexName = jsonResponse.stringOf("Table.LocalSecondaryIndexes[i].IndexName")
    IndexSizeBytes = jsonResponse.IntOf("Table.LocalSecondaryIndexes[i].IndexSizeBytes")
    ItemCount = jsonResponse.IntOf("Table.LocalSecondaryIndexes[i].ItemCount")
    ProjectionProjectionType = jsonResponse.stringOf("Table.LocalSecondaryIndexes[i].Projection.ProjectionType")
    j = 0
    count_j = jsonResponse.SizeOfArray("Table.LocalSecondaryIndexes[i].KeySchema")
    while j < count_j
        jsonResponse.put_J(j)
        AttributeName = jsonResponse.stringOf("Table.LocalSecondaryIndexes[i].KeySchema[j].AttributeName")
        KeyType = jsonResponse.stringOf("Table.LocalSecondaryIndexes[i].KeySchema[j].KeyType")
        j = j + 1
    end
    i = i + 1
end