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- #Amazon aws dynamodb client how to
- #Amazon aws dynamodb client update
- #Amazon aws dynamodb client series
Private readonly IAmazonDynamoDB _client Private const string StatusActive = "ACTIVE" Private const string StatusUnknown = "UNKNOWN" A more detailed explanation of each parameter can be found in AWS examples in C# – create a service working with DynamoDB post. It can be changed to PAY_PER_REQUEST and then ProvisionedThroughput should not be specified. The ProvisionedThroughput is needed because the default BillingMode is PROVISIONED. In the current example, it is 5 capacity units for reading and the same for writing. ProvisionedThroughput is used to set the read and write capacity mode.
#Amazon aws dynamodb client update
This means that in case of add, update or delete, the DynamoDBEvent, which is later used in a lambda, holds both the new values and the old values of the item. A stream is defined with StreamSpecification element in the CreateTableRequest, its StreamViewType is NEW_AND_OLD_IMAGES. They can be defined with GlobalSecondaryIndexes and LocalSecondaryIndexes elements of the CreateTableRequest. I have not used secondary indexes in the current example, but DynamoDB provides this functionality. In the case of the Actors table, along with the partition key, there is also a sort key with KeyType of RANGE which is complimentary to the HASH. In the case of the Movies table, there is only a HASH key, which is always mandatory and unique, this means no two items can have the same partition key value, the second insert overwrites the first one. KeyType has two possible values – HASH and RANGE. The attributes must also be defined in the AttributeDefinitions list. KeySchema specifies the attributes that build the primary key for a table or an index. Movies and Actors tables creation is done in separate classes with CreateTableRequest, which needs the table name. Afterward, it waits for the table to become in status ACTIVE. It checks if the table is created and if it is not, then it creates the table. AwsCredentials class extends the AWS’ abstract AWSCredentials and is used in order to manage the credentials.ĭatabaseClient class that uses and exposes just a few methods of IAmazonDynamoDB is custom created. RegionEndpoint is used to instantiate AmazonDynamoDBConfig. The concrete AWS client implementation is AmazonDynamoDBClient and an object is instantiated in DynamoDbClientFactory class and used as a singleton. The NuGet package is called AWSSDK.DynamoDBv2. The DynamoDB client interface is called IAmazonDynamoDB and comes from AWS C# SDK. In order to work with DynamoDB, a client is needed. Its values are injected from the environment variables by. In the current examples, in SqsReader project, a configuration class called AppConfig is used.
#Amazon aws dynamodb client how to
In the current post, I give practical code examples of how to work with DynamoDB.
#Amazon aws dynamodb client series
The code used for this series of blog posts is located in GitHub repository. This post is part of AWS examples in C# – working with SQS, DynamoDB, Lambda, ECS series. Post summary: Code examples with DynamoDB write and read operations.