• Joshi Bhavya
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Hi all,

We need to implement the following pattern at my org:
  • callout to external data source
  • if that callout takes too long (according to some configurable threshold), log an error (ie do some DML)
  • if that callout timed out on the remote server, try it again
Recognizing the potential for the dreaded "You have uncommitted work pending. Please commit or rollback before calling out." error, I put the error logging code in a future method, thus isolating the DML from the callouts. However, the error is still being thrown. I reduced the issue down to this pattern:
public static void foo() {
    Http http = new Http();
    HttpRequest req = new Httprequest();
    req.setEndpoint('https://test.salesforce.com'); //whatever endpoint
    http.send(req); //works fine
    http.send(req); //throws calloutexception

@future public static void bar() {

Am I correct to assume that calling a future method counts as a DML operation? Is there any documentation I'm missing somewhere?

Hello All,

I will try to frame my question in short.

End Goal : REST API Integration from Salesforce to a InHouse Lead Management System(LMS2)

SUCCESS Through Chrome APP
1.  All i need to do is retrieve values from LMS2. When i tried to use the Chrome APP 'Advanced Rest Client' and have passed the appropriate URL and Content in XML/TEST format in the form of POST methoed I was able to retrieve the values from LMS2 database.
For EG : If i pass 92126 then i was able to get 'SAN DIEGO' which is correct.

Here is the link (https://chrome.google.com/webstore/detail/advanced-rest-client/hgmloofddffdnphfgcellkdfbfbjeloo?hl=en-US)for Advanced REST Client.

PROBLEM from Salesforce :

2) When i created this REST class in SAlesforce and tried invoking the End Point then its throwing this error.

System.HttpResponse[Status=Service Unavailable, StatusCode=503]

public with sharing class LmsRestApiIntegration {

@future(callout = true)
public static void invokeRestAPI(){
String URL = 'http://pasquote-bfapp.tent.trt.ccc.pri/QuickQuoteWebSvc/QQWebSvc.asmx';
String xmlContent = '';
xmlContent = '<?xml version="1.0" encoding="utf-8"?>';
xmlContent = xmlContent + '<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">';
xmlContent = xmlContent + '<soap:Body>';
xmlContent = xmlContent + '<GetCityListFromZip xmlns="http://www.ccc.com/irv/quickquote/auto/2006/10/01">';
xmlContent = xmlContent + '<zipcode>92126</zipcode></GetCityListFromZip>';
xmlContent = xmlContent + '</GetCityListFromZip>';
xmlContent = xmlContent + ' </soap:Body>';
xmlContent = xmlContent + '</soap:Envelope>';
Http h = new Http();
HttpRequest req = new HttpRequest();
req.setHeader('content-length', '0');
req.setHeader('SoapAction', 'http://www.ccc.com//irv/quickquote/auto/2006/10/01/GetCityListFromZip');
String response = '' ;
HttpResponse res = h.send(req);
response = res.getBody();

System.debug('Response :'+response);


Please guide.

Thank You