multithreaded-server

Console Application, Multithreaded JSON database with API enabling CRUD operations

project was completed as a graduate project for Java Developer track on Jet Brains Academy

Stack:

• Java 17
• gradle 8.0.2

API contract

The key should not only be a string since the user needs to retrieve part of the JSON value. For example, in the code snippet below, the user wants to get only the surname of the person:

{
    "person": {
        "name": "Adam",
        "surname": "Smith"
    }
}

Then, the user should type the full path to this field in a form of a JSON array:

["person", "surname"]

If the user wants to get the full person object, then they should type:

["person"]

The user should be able to set separate values inside JSON values. For example, it should be possible to set only the surname using a key

["person", "surname"]

and any value including another JSON. Moreover, the user should be able to set new values inside other JSON values. For example, using a key

["person", "age"]

and a value 25, the person object should look like this:

{
    "person": {
        "name": "Adam",
        "surname": "Smith",
        "age": 25

    }
}

If there are no root objects, the server should create them, too. For example, if the database does not have a "person1" key but the user set the value

{"id1": 12, "id2": 14}

for the key

["person1", "inside1", "inside2"]

then the database will have the following structure:

{
    "person1": {
        "inside1": {
            "inside2" : {
                "id1": 12,
                "id2": 14
            }
        }
    },
...
}

The deletion of objects should follow the same rules. If a user deletes the object above by the key

["person1", "inside1", "inside2"]

then only "inside2" should be deleted, not "inside1" or "person1". See the example below:

{
... ,
"person1": {
"inside1": { }
}

    ...
}