ExtJS variable not populating with servlet data

I'm facing an issue with my code where I am calling a servlet from JavaScript using an AJAX request. The data from the servlet is shown in a message box within the success function, but it's not being loaded into a variable called `myData` in JavaScript. The data from the servlet is in JSON format. Can someone please help me debug this? Here's the relevant portion of my code:

var myData = null;
Ext.Ajax.request({
    url: 'MyDataServlet',
    method: 'GET',
    loadMask: true,
    scope: this,
    success: 
    function ( result, request ) { 
        Ext.MessageBox.alert('success', result.responseText); 
        myData = Ext.decode(result.responseText);
        console.log(myData);
        store.loadData(myData);

    },
    failure: 
    function (result, request) { 
        Ext.MessageBox.alert('Failed', result.responseText); 
    } 
});

Answer №1

The initial letter "A" in "AJAX" signifies "asynchronous", indicating that the program flow proceeds before obtaining a response from the server (akin to a "fire and forget" situation). In this scenario, the variable myData is exclusively assigned subsequent to receiving the response, making it unreliable to assume the remaining code will execute prior to that point. Any actions involving myData must be invoked within the success callback function.

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