CODEWITHSUNDEEP
javadockeramazon-dynamodb
slipperypete
slipperypete

Reputation: 6246

How to get local dynamodb running so my java app can connect with it?

I have looked at several stackoverflow posts as well as the AWS docs for dynamodb to answer this question. I want to be able to run local dynamodb in docker and then connect to it from my locally running java app. I have installed the amazon/dynamodb-local image and have it working. I have even used the aws cli to create a table, list tables, delete tables etc on this locally running dynamodb. I got the dynamodb sdk dependency installed in the java project and I feel like I got everything wired up to work, ran an integration test and boom I get this error message

com.amazonaws.services.dynamodbv2.model.ResourceNotFoundException: Cannot do operations on a non-existent table (Service: AmazonDynamoDBv2; Status Code: 400; Error Code: ResourceNotFoundException; Request ID: c915ea26-008e-4a9f-8b99-6df5d6aa7c5f)

The table does exist when run the list-tables function with the aws cli so I googled and then I checked the docs dynamodb docs and it seems like you have to start the local dynamodb with a flag

-sharedDb

I tried this by trying to start the locally running dynamodb with this command

docker run -p 8000:8000 amazon/dynamodb-local -sharedDb

Although I get the error

Unrecognized option: -sharedDb Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.

I have tried googling after this or looking for somebody that has had a similar problem. But I find nothing. How can I start the locally running dynamodb and connect to it from my locally running java app?

Upvotes: 1

Views: 1631

Answers (1)

Mostafa Hussein
Mostafa Hussein

Reputation: 11940

You need to write the command like this

docker run -p 8000:8000 amazon/dynamodb-local -jar DynamoDBLocal.jar -sharedDb

Don't forget that you might need to mount a volume in order to keep the data on the host as using the above command wont make the data saved if you have removed the container and to do this you need to use -v flag

docker run -p 8000:8000 -v /path/to/data/locally:/data/ amazon/dynamodb-local -jar DynamoDBLocal.jar -sharedDb -dbPath /data

For more options you can use (note the --rm flag)

docker run --rm -p 8000:8000 amazon/dynamodb-local -jar DynamoDBLocal.jar -help

Upvotes: 5

Related Questions