Use Cases for Server Side Variables

Server-side variables can access all the details of the server-side environment, including the local storage on the virtual machine or any value that is submitted from the client-side to your JENTIS server.

Read and Write Local Storage Properties

With the following server-side variable, you can access an event's property, check the value, and return a result based on it. For this, local storage is very helpful, which can hold information for later use. One example might be a situation where you want to deduplicate transactions that are tracked in your frontend. Sounds interesting? Here is a detailed guide on implementing a server-side deduplication function with server-side variables.

The basic syntax of server-side variables follows this general template:

async function(){
  var storage_value = await this.storage.read("storage_name");
  
  this.storage.write("storage_name", "updated value", Date.now()[phone]);
}

Server-Side to Client-Side variable references

This feature enables users to access the value of another client-side variable within a client-side variable. As a result, it is possible to reuse values from existing variables. Furthermore, even references of references of references are achievable.

The reference functionality can be used like this:

this.getFrontendVariable("<ID of client-side variable>");

The ID of a variable can be found in the edit view of the JTM in the property field “ID”.\

It is important to note that this functionality only works with the JENTIS wrapper scripts we provide.

Full client-side variable example for gathering the screen resolution:

async function() {
    return this.getFrontendVariable("window_screen_width") + " x " + this.getFrontendVariable("window_screen_height");
}