SFDC Integration

 Rest API.

Connected APP in OrgB

Auth. Provider In OrgA

Named Credential In OrgA

RestResource Class:

@RestResource(urlMapping='/Cases/*')

global with sharing class CaseManager {

    @HttpGet

    global static list<Case> getCases() {

        list<Case> result =  [SELECT CaseNumber,Subject,Status,Origin,Priority FROM Case limit 10];

        return result;

    }

    @HttpPost

    global static ID createCase(String subject, String status,

        String origin, String priority) {

        Case thisCase = new Case(

            Subject=subject,

            Status=status,

            Origin=origin,

            Priority=priority);

        insert thisCase;

        return thisCase.Id;

    }   

}

SalesforceConnect Class to Authenticate to OrgB and Get and create cases using named credential :

public class salesforceConnect {

    public static void getCasesFromSalesforceOrgB() {

        Http http = new Http();

        HttpRequest request = new HttpRequest();

// calling Named Credential Like below ----- callout:SFDCB

//Calling rest resource class like services/apexrest/cases

        request.setEndpoint('callout:SFDCB/services/apexrest/cases');

        request.setMethod('GET');

        HttpResponse response = http.send(request);

        if(response.getStatusCode() == 200) {

            list<Object> Results = (list<Object>) JSON.deserializeUntyped(response.getBody());

           // Map<String, Object> results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());

            System.debug('Received the following cases:');

            for(Object result: Results) {

                Map<String, Object> caseProps = (Map<String, Object>) result;

                System.debug('CaseNumber'+caseProps.get('CaseNumber')+'- SubJect'+caseProps.get('Subject'));

            }

        }

    }

    public static void  createCaseInOrgB() {

       Http http = new Http();

        HttpRequest request = new HttpRequest();

        request.setEndpoint('callout:SFDCB/services/apexrest/cases');

        request.setMethod('POST');

        request.setBody('{"CaseNumber":"00001026","Subject":"Bigfoot Sighting!","Status":"New","Origin":"Phone","Priority":"Low"}');

        HttpResponse response = http.send(request);

        if(response.getStatusCode() == 200) {

            list<Object> Results = (list<Object>) JSON.deserializeUntyped(response.getBody());

           // Map<String, Object> results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());

            System.debug('Received the following cases:');

            for(Object result: Results) {

                Map<String, Object> caseProps = (Map<String, Object>) result;

                System.debug('CaseNumber'+caseProps.get('CaseNumber')+'- SubJect'+caseProps.get('Subject'));

            }

        }

    }

}