[SalesForce] How to overcome 120 sec timeout in REST webservice calls

I have a requirement where a user can request some data as an email attachment from one of our visualforce pages.

I am fetching the data over a REST web service call from an external system.
Using that data an Excel document is created and sent as an attachment in an email to the user.
However, to fetch the data in certain scenarios, due to the huge data load, we are getting stuck with the 120 second timeout.

Is there a way I can use @future or any other workaround to overcome this issue?

Best Answer

See this blog article by Jitendra Zaa titled Continuation object in Apex – Asynchronous callouts for long running request – Live Demo where he talks about using the Continuation method to call a web service asynchronously then have it displayed later in a visualforce page. I suspect it may be what you're looking for.

He also references Actionsupport and JS remoting as comparison methods.

Related Solutions

[SalesForce] Test class Rest Webservice parameters

Change your test class to use the RestRequest.addParameter method. This method is used for setting parameters to be used by the webservice in a test.

You should also use a relative URL for the request URI value instead of hardcoding a fully qualified URL. I would also suggest adding some assertions to the test method.

@isTest
private class StoreControllerTest {

    static testMethod void testGet() {

        //do request
        RestRequest req = new RestRequest(); 
        RestResponse res = new RestResponse();

        req.requestURI = '/services/apexrest/Accounts';  
        req.addParameter('page', '0');
        req.addParameter('time', '1390296387');
        req.addParameter('hash', '1wer2547');

        req.httpMethod = 'GET';
        RestContext.request = req;
        RestContext.response = res;

        String results = StoreController.getAccounts();

    }
}

[SalesForce] Rest API request timeout

You can set REST API call-out time to maximum 120 second. If your .NET application is unable to process request in 120 seconds then you will have to optimize .net webservice. Default timeout is 10 seconds.

Sample:

        HttpRequest req = new HttpRequest();
        req.setEndpoint(endpoint_url);
        req.setMethod('GET');
        req.setTimeout(120000);

Best Answer

Related Solutions

[SalesForce] Test class Rest Webservice parameters

[SalesForce] Rest API request timeout

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