Het kan zijn dat u een record moet maken en deze vervolgens moet bijwerken met informatie die door een webservice wordt verstrekt. Er mag echter geen webservice worden aangeroepen na een DML-instructie binnen dezelfde transactie. Om de vereiste actie te realiseren, moet de transactie in twee delen worden gesplitst, zodat de DML-transactie wordt voltooid voordat de webservice wordt aangeroepen.
Met het eerste wordt de record ingevoegd. Het tweede voert de aanroep uit en kan de nieuw ingevoegde record bijwerken.
Pagina 'TestWsCallout'<apex:page controller="TestWsCallout" tabstyle="Account"> <apex:form > <apex:actionFunction action="{!InsertRecord}" name="InsertRecord_JS" Rerender="statuses" status="Status1" oncomplete="CallWebService_JS();"/> <apex:actionFunction action="{!CallWebService}" name="CallWebService_JS" status="Status2" reRender="statuses, msg"/> <apex:outputPanel id="statuses"> <apex:actionStatus id="Status1" startText="...Inserting Record Into DB..." /> <apex:actionStatus id="Status2" startText="...Calling Web Service..." /> </apex:outputPanel> <apex:outputPanel id="msg"> <apex:pageMessages /> </apex:outputPanel> <div><input name="DoAction" class="btn" type="button" value="Do Action" onclick="InsertRecord_JS();return false;"/></div> </apex:form> </apex:page>public class TestWsCallout{ Account myAccount; public PageReference InsertRecord() { myAccount = new Account(name = 'Test Account'); insert myAccount; // Calling a Web Service here would throw an exception return null; } public PageReference CallWebService() { // Execute a call to a Web Service HttpRequest req = new HttpRequest(); req.setEndpoint('http://MyWebService12345678790.com?id=' + myAccount.Id); req.setMethod('GET'); HttpResponse response = new Http().send(req); // Simulate an update myAccount.Name = 'Test Account 2'; update myAccount; ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.CONFIRM, 'WebService Called on New Account: ' + myAccount.Name)); return null; } }
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