ValueWriter Example

You are creating a converter for Eclipse NoSQL that will work without a mapping annotation. You can use both ValueWriter and ValueReader.

• ValueWriter: This interface represents an instance of Value to write in a database.
• ValueReader: This interface represents how the Value will convert to Java application. This interface will use the T get(Class type) and T get(TypeSupplier typeSupplier).

Steps

• The first step is to create the converter to a custom type database, the ValueWriter.
• ValueWriter created and the Money type will save as String, then the next step is read information to Java application. As can be seen, a ValueReader implementation.

After both implementations have been completed, the last step is to register them into two files:

• META-INF/services/jakarta.nosql.ValueReader
• META-INF/services/jakarta.nosql.ValueWriter

Using Docker

1. Install docker: https://www.docker.com/
2. https://store.docker.com/images/mongo
3. Run docker command
4. Run MongoDB: verify MongoDB image name with the command docker images, it can be mongodb or mongo, and then execute this command
   1. docker run -d --name mongodb-instance -p 27017:27017 mongo

Run the code

With a MongoDB instance running go to the class App and have fun.