In this blog, we will discuss on how to invoke a lightning Auto launched flow from the apex class.
The flow in Salesforce can be launched without user Interaction such as from a process builder or the apex code. So here we are creating a auto launched flow and call it through the apex code.
Let’s take a simple example to understand how to call a lightning flow from the apex.
Example
In this example, we are getting the value of Opportunity Stage name based on the opportunity id that we are passing from the apex code.
Firstly, we have created lightning auto launched flow in which we have created two variables first is recordId and it is set as ‘available for Input’ and second is Opportunitystage which is used to send output to the apex class, and it is set as ‘available for Output’. Kindly refer below image.
Secondly, to get opportunity records we have added ‘Get Records’ element in flow. Further more, we assign opportunity stageName field to the ‘Opportunitystage’ variable as shown in below image.
For instance, to call flow from apex class, create an instance of an Interview object by using ‘Flow.Interview.flowName’. It uses start() method to execute your flow.
For example, refering to the apex class code below, you will notice we have created the instance of Interview object and passes opportunity Id as a parameter.
//Create parameter
Map<String, Object> Params = new Map<String, Object>();
Params.put('recordId','006p000000Aal2EAAR');
//create instance of Interview
Flow.Interview.GetOpprtunityStageName stage = new Flow.Interview.GetOpprtunityStageName(Params);
//Invoke start method
stage.start();
//get value from Flow
string stageName=(string)stage.getvariableValue('opprtunityStage');
system.debug('stageName::: '+stageName);
As a result, after execution of flow it will return the stage of that particular opportunity which id we have passed as a parameter. kindly refer to the below image.
In conclusion, using the steps above you can call lightning auto launched flow from the apex code.
We hope that you find this blog helpful, if you still have queries, don’t hesitate to contact us at salesforce@greytrix.com.
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