How to Use Server Process in async Mode?

March 11, 2020Posted inAPEX

 apex.server.process namespace works in async mode, meaning whenever you hit the process it never waits to complete.

Let’s take below example.

AJAX process name : GET_EMP_DATA
Description: This process bring data from ORDS REST API.

function get_data(p_url, p_pegination) {
    return apex.server.process('GET_EMP_DATA', {
        pageItems: "#P28_NEW",
        x01: p_pegination,
        x02: p_url
    }, {
        dataType: 'text',
        done: function (pData) {
            console.log(pData);
            alert('pData');
            $('#EMP_DATA').append(pData);
        }
    }, {
        loadingIndicator: "#EMP_DATA",
        loadingIndicatorPosition: "append"
    });
}

To run the above AJAX function we create one function like below

function run() {
    console.log('Start');
    var result = get_data('https://apex.oracle.com/pls/apex/ashish_portfolio/hr/test_emp', '2');
    console.log(result);
    console.log('End');
}

When you run the run() function it never waits for get_data to complete.

To achieve this we need to use async / await approach. Let’s try below function

async function run() {
    console.log('Start');
    var result = await get_data('https://apex.oracle.com/pls/apex/ashish_portfolio/hr/test_emp', '2');
    console.log(result);
    console.log('End');
}

Now when we run the run() function it will wait for get_data to complete and return into result.

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