Salesforce Integration using REST SOAP and HTTP callouts

Integrations
Inbound(REST and SOAP)
Outbound
Salesforce to Salesforce

 Create remote site settings first to allow the url to be accessible in salesforce.
Outbound Integration: How to invoke callouts

 1. From Setup, enter Remote Site Settings in the Quick Find box,
 2. Click Remote Site Settings.
 3. Click New Remote Site.
 4. Provide a name for the remote site
 5. Provide the URL for the remote site. This URL authorizes all subfolders for the endpoint, like
https://and https://th-apex-http-callout.herokuapp.com/path2. th-apex-http-
callout.herokuapp.com/path1
 6. Provide a description for the remote site / service.
 7. Click Save
To authorize remote callouts


public static HttpResponse makeGetCallout() {
 Http http = new Http();
 HttpRequest request = new HttpRequest();
 request.setEndpoint('https://th-apex-http-callout.herokuapp.com/animals');
 request.setMethod('GET');
 HttpResponse response = http.send(request);
 // If the request is successful, parse the JSON response.
 if (response.getStatusCode() == 200) {
 // Deserializes the JSON string into collections of primitive data types.
 Map<String, Object> results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());
 // Cast the values in the 'animals' key as a list
 List<Object> animals = (List<Object>) results.get('animals');
 System.debug('Received the following animals:');
 for (Object animal: animals) {
 System.debug(animal);
 }
 }
 return response;
 }
Get the data using callouts using heroku endpoint

public static HttpResponse makePostCallout() {
Http http = new Http();
HttpRequest request = new HttpRequest();
request.setEndpoint('https://th-apex-http-callout.herokuapp.com/animals');
request.setMethod('POST');
request.setHeader('Content-Type', 'application/json;charset=UTF-8');
request.setBody('{"name":"mighty moose"}');
HttpResponse response = http.send(request);
// Parse the JSON response
if (response.getStatusCode() != 201) {
System.debug('The status code returned was not expected: ' +
response.getStatusCode() + ' ' + response.getStatus());
} else {
System.debug(response.getBody());
}
return response;
}
Post the data using callouts

Inbound Integration:How to expose Apex classes
 SOAP :Protocol Neutral – accessible via HTTP, SMTP, TCP and other
application level protocols. Only XML. Requires WSDL
 REST: REStricted to http protocol,but can use JSON, XML, Atom and
others.

Workbench rest api demo
//use this url to call from workbench /services/apexrest/devlight1973/GetCase/5009000001NxD87

 package sfdc_rest;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URISyntaxException;
 import org.apache.http.client.methods.*;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.HttpResponse;
 import org.apache.http.HttpStatus;
 import org.apache.http.ParseException;
 import org.apache.http.util.EntityUtils;
 import org.apache.http.client.utils.URIBuilder;
 import org.apache.http.client.ClientProtocolException;
 import org.json.JSONObject;
 import org.json.JSONTokener;
 import org.json.JSONException;
 public class Main {
 static final String USERNAME = "narenrr@yahoo.com";
 static final String PASSWORD = "2WHVAUUcVWbxXMmKFQDEl1sgK0";
 static final String LOGINURL = "https://login.salesforce.com";
 static final String GRANTSERVICE =
 "/services/oauth2/token?grant_type=password";
Advanced example – JAVA rest api

 Generate enterprise WSDL
 Generate Class wsdl
 Enter user name /pwd/token
 Get session id and url prefix
 Invoke method with session id and correct endpoint url
How to expose webservice with SOAP

 Between two prod orgs
 One will be sender,other will be reciever of changes
 Cannot be done with developer org.
Salesforce to Salesforce

 Bad news salesforce does not allow callouts to be tested.
 Good News: Mock callouts to the rescue. Basically simulates a static
resource as target ,instead of the actual url.
 Purpose is to get code coverage of callouts
Testing callouts

Test class for the same
@isTest
private class CalloutClassTest {
@isTest static void testCallout() {
// Set mock callout class
Test.setMock(HttpCalloutMock.class, new MockHttpResponseGenerator());
HttpResponse res = CalloutClass.getInfoFromExternalService();
// Verify response received contains fake values
String contentType = res.getHeader('Content-Type');
System.assert(contentType == 'application/json');
String actualValue = res.getBody();
String expectedValue = '{"example":"test"}';
System.assertEquals(actualValue, expectedValue);
System.assertEquals(200, res.getStatusCode());
}
}

Salesforce Integration using REST SOAP and HTTP callouts

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