add table delete and update. add item ops, including querying.

This commit is contained in:
Steve Pulec 2013-03-13 09:06:45 -04:00
commit 621ac79f33
3 changed files with 382 additions and 16 deletions

View file

@ -48,6 +48,50 @@ class DynamoHandler(object):
response["LastEvaluatedTableName"] = tables[-1]
return json.dumps(response)
def CreateTable(self, uri, body, headers):
name = body['TableName']
key_schema = body['KeySchema']
hash_hey = key_schema['HashKeyElement']
hash_key_attr = hash_hey['AttributeName']
hash_key_type = hash_hey['AttributeType']
range_hey = key_schema['RangeKeyElement']
range_key_attr = range_hey['AttributeName']
range_key_type = range_hey['AttributeType']
throughput = body["ProvisionedThroughput"]
read_units = throughput["ReadCapacityUnits"]
write_units = throughput["WriteCapacityUnits"]
table = dynamodb_backend.create_table(
name,
hash_key_attr=hash_key_attr,
hash_key_type=hash_key_type,
range_key_attr=range_key_attr,
range_key_type=range_key_type,
read_capacity=int(read_units),
write_capacity=int(write_units),
)
return json.dumps(table.describe)
def DeleteTable(self, uri, body, headers):
name = body['TableName']
table = dynamodb_backend.delete_table(name)
if table:
return json.dumps(table.describe)
else:
er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException'
return self.error(er)
def UpdateTable(self, uri, body, headers):
name = body['TableName']
throughput = body["ProvisionedThroughput"]
new_read_units = throughput["ReadCapacityUnits"]
new_write_units = throughput["WriteCapacityUnits"]
table = dynamodb_backend.update_table_throughput(name, new_read_units, new_write_units)
return json.dumps(table.describe)
def DescribeTable(self, uri, body, headers):
name = body['TableName']
try:
@ -57,6 +101,66 @@ class DynamoHandler(object):
return self.error(er)
return json.dumps(table.describe)
def PutItem(self, uri, body, headers):
name = body['TableName']
item = body['Item']
result = dynamodb_backend.put_item(name, item)
item_dict = result.describe
item_dict['ConsumedCapacityUnits'] = 1
return json.dumps(item_dict)
def GetItem(self, uri, body, headers):
name = body['TableName']
hash_key = body['Key']['HashKeyElement'].values()[0]
range_key = body['Key']['RangeKeyElement'].values()[0]
attrs_to_get = body.get('AttributesToGet')
item = dynamodb_backend.get_item(name, hash_key, range_key)
if item:
item_dict = item.describe_attrs(attrs_to_get)
item_dict['ConsumedCapacityUnits'] = 0.5
return json.dumps(item_dict)
else:
er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException'
return self.error(er)
def Query(self, uri, body, headers):
name = body['TableName']
hash_key = body['HashKeyValue'].values()[0]
range_condition = body['RangeKeyCondition']
range_comparison = range_condition['ComparisonOperator']
range_value = range_condition['AttributeValueList'][0].values()[0]
items, last_page = dynamodb_backend.query(name, hash_key, range_comparison, range_value)
result = {
"Count": len(items),
"Items": [item.attrs for item in items],
"ConsumedCapacityUnits": 1,
}
if not last_page:
result["LastEvaluatedKey"] = {
"HashKeyElement": items[-1].hash_key,
"RangeKeyElement": items[-1].range_key,
}
return json.dumps(result)
def DeleteItem(self, uri, body, headers):
name = body['TableName']
hash_key = body['Key']['HashKeyElement'].values()[0]
range_key = body['Key']['RangeKeyElement'].values()[0]
return_values = body.get('ReturnValues', '')
item = dynamodb_backend.delete_item(name, hash_key, range_key)
if item:
if return_values == 'ALL_OLD':
item_dict = item.describe
else:
item_dict = {'Attributes': []}
item_dict['ConsumedCapacityUnits'] = 0.5
return json.dumps(item_dict)
else:
er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException'
return self.error(er)
def handler(uri, body, headers):
body = json.loads(body or '{}')