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Access Setup, and search for "Apex" in the search box.

Classic and Lightning

We provide two examples here. 

The first example queries email Task objects from the Salesforce systemCreate a new class. Add the following code:

Code Block
titleSample Apex genericQuery
@RestResource(urlMapping='/jtelACD/genericQuerygetEmailTasks')
global with sharing class JTELACD_GenericQueryGetEmailTasks {
    // Class to decode the parameters
    public class GenericQueryParams {
        public String Param1;
        public String Param2;
        public String Param3;
        public String Param4;
        public String Query;
    }
    
    @HttpPost
    global static Stringvoid doPost() {
        RestRequest req = RestContext.request;
        RestResponse res = RestContext.response;
        res.addHeader('Content-Type', 'application/json');
        //
 Deserialize the JSON (not used in this example// -Deserialize just for illustration purposes)the JSON
        GenericQueryParams genericQueryParams = (GenericQueryParams) System.JSON.deserialize( req.requestBody.toString(), GenericQueryParams.class );
 
        List<Task> tasks = [
            SELECT FIELDS(STANDARD),
                   TYPEOF Who
                       WHEN Lead THEN FirstName, LastName, Email
                       WHEN Contact THEN FirstName, LastName, Email
                   END
            FROM Task
            WHERE Status = 'Inbound Email'
            WITH USER_MODE
            LIMIT 1
        ];
                          
 // Find next task to schedule in jtelif system.(tasks.size() > 0) {
        // Note - the exactres.statusCode logic= of200;
 this will be dependent on the Salesforce installation - this is JUSTres.responseBody AN EXAMPLE.= Blob.valueOf(JSON.serialize(tasks[0]));
            return;
        List<Task> tasks = [SELECT FIELDS(STANDARD),}

        res.statusCode = 404;
        res.responseBody = Blob.valueOf('{"error":"No task found"}');
    }
}

The second example sets Task objects to "In Progress" in Salesforce:

Code Block
titleSample Apex genericQuery
@RestResource(urlMapping='/jtelACD/setEmailTaskStatus')
global with sharing class JTELACD_SetEmailTaskStatus {

    // Class to decode the parameters
    public class GenericQueryParams {
        public String Param1;
        public String Param2;
        public TYPEOFString WhoParam3;
        public String Param4;
        public String Query;
    }

    @HttpPost
    global static void doPost() {

      WHEN Lead THENRestRequest FirstName,req LastName, Email= RestContext.request;
        RestResponse res = RestContext.response;

        res.addHeader('Content-Type', 'application/json');

        // Deserialize the JSON
        GenericQueryParams genericQueryParams WHEN= Contact THEN FirstName, LastName, Email(GenericQueryParams) JSON.deserialize( req.requestBody.toString(), GenericQueryParams.class );

        if (String.isBlank(genericQueryParams.Param1)) {
            res.statusCode = 400;
            ENDres.responseBody = Blob.valueOf('{"error":"Missing task id"}');
            return;
        }

         FROM Taskif (String.isBlank(genericQueryParams.Param2)) {
            res.statusCode = 400;
            WHERE Statusres.responseBody = 'Inbound Email'
Blob.valueOf('{"error":"Missing status"}');
            return;
        }

        WITH USER_MODE
List<Task> tasks = [
            SELECT FIELDS(STANDARD)
            FROM Task
         LIMIT 1];
  WHERE Id = :genericQueryParams.Param1
            LIMIT 1
        ];

        if ( tasks.sizeisEmpty() >= 0 ) {) {
            res.statusCode = 404;
            res.responseBody = Blob.valueOf('{"error":"Task not found"}');
            return;
        }

    return JSON.serialize(    Task task = tasks[0] );
;
        task.Status = genericQueryParams.Param2;

        update }task;

        res.statusCode = 404200;
        return nullres.responseBody = Blob.valueOf(JSON.serialize(task));
    }
}

CURL Test

First of all, obtain an OAUTH Token, see Testing with CURL.

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