Integrating One Salesforce Org to Another Salesforce

In this post we will learn about how to integrate one salesforce org to another salesforce org using REST service. 

Let's suppose we have 2 different Salesforce Org's and call it Source(where we create record) and Destination(create a record here when a record is created in Source).

Now let's divide this process into 3 steps.

1.  Creating Connected App

            In this step, let us create a connected app in destination org which is required to connect from Source.

• Go to Setup and search for App Manager  and click on it
  
  
        
• Click on New Connected App
• Fill out Basic Information

• Next Fill API (Enable OAuth Settings)

        For now Call Back URL is not required. So just give some dummy value.

• Click on Save.
• Once you save, it takes 2 minutes to host a connected application 
• Consumer Key and Consumer Secret will be generated after 2 minutes.

    2.  Create a Trigger and Helper Class in Source Org

          Now let's jump into Source Org and create a connection between 2 Salesforce Org's.

          Click on the Gear Icon and Open Developer Console.

• Click on File then New and Choose Apex Trigger and give your Trigger Class Name and select the object you want to Create a Trigger on.
• In this example, we will write a trigger on Account and Name Trigger as accountTrigger and invoke it after the record is inserted.

• Now create a field in Account Object in Source Org to store the record ID that has been created in Target Org and label it External Id.
• Now we will create a helper class(sendAccountDetails) which receives data from Trigger Class(accountTrigger).

public class sendAccountDetails {
    private final String clientId = 'consumerKey'; //Consumer Key from Connected App created in Target Org
    private final String clientSecret = 'customerSecret'; //Consumer Secret from Connected App created in Target Org
    private final String username = 'test@gmail.com';
    private final String password = 'password&SecurityToken'; //Replace your Target Org Password and securityToken
    
    public class deserializeResponse{
        public String id;
        public String access_token;
    }
    
    public String ReturnAccessToken (sendAccountDetails account){
        String reqbody = 'grant_type=password&client_id='+clientId+'&client_secret='+clientSecret+'&username='+username+'&password='+password;
        Http h = new Http();
        HttpRequest req = new HttpRequest();
        req.setBody(reqbody);
        req.setMethod('POST');
        req.setEndpoint('https://targetOrgDomain.my.salesforce.com/services/oauth2/token');
        HttpResponse res = h.send(req);
        deserializeResponse resp1 = (deserializeResponse)JSON.deserialize(res.getbody(),deserializeResponse.class);
        return resp1.access_token;
    }
    
    @future(callout=true)
    public static void createAccount(String accName, String accId){
        sendAccountDetails account = new sendAccountDetails();
        String accessToken = account.ReturnAccessToken(account);
        System.debug('accessToken '+accessToken);
        if(accessToken != null){
            String endPoint = 'https://targetOrgDomain.my.salesforce.com/services/data/v32.0/sobjects/Account/';
            String jsonstr = '{"Name" : "' + accName + '"}';
            Http h2 = new Http();
            HttpRequest req1 = new HttpRequest();
            req1.setHeader('Authorization','Bearer ' + accessToken);
            req1.setHeader('Content-Type','application/json');
            req1.setHeader('accept','application/json');
            req1.setBody(jsonstr);
            req1.setMethod('POST');
            req1.setEndpoint(endPoint);
            HttpResponse res1 = h2.send(req1);
            deserializeResponse resp2 = (deserializeResponse)JSON.deserialize(res1.getbody(),deserializeResponse.class);
            Account a = [SELECT Id FROM Account WHERE Id = :accId];
            a.External_Id__c = resp2.id;
            update a;
        }
    }
}

• Invoke the helper class created above from Trigger that was created on Account (accountTrigger)

trigger accountTrigger on Account (after insert) {
    for(Account a : Trigger.new){
        sendAccountDetails.createAccount(a.Name, a.Id);
    }
}

    3.  Creating a class in Target org and Exposing it as REST Service

• Click on the Gear Icon and Open Developer Console.
• Click on File then New and Choose Apex Class and give your Class Name as createAccountFromOtherSystem
• Enter the code given below.

@RestResource(urlMapping='/v1/createAccountFromOtherSystem/*')
global with sharing class createAccountFromOtherSystem {
    @HttpPost
    global static String createAccount(String AccName)
    {
        Account a = new Account();
        a.Name = AccName;
        insert a;
        String returnResponse = JSON.serialize(a);
        return returnResponse;
    }
}