Tag Archives: Force.com

Limit Class and Limit Methods in Salesforce

The Limits methods return the specific limit for the particular governor, such as the number of calls of a method or the amount of heap size remaining.

Because Apex runs in a multitenant environment, the Apex runtime engine strictly enforces a number of limits to ensure that runaway Apex doesn’t monopolize shared resources.

None of the Limits methods require an argument. The format of the limits methods is as follows:

 Integer queryLimitRows = Limits.getLimitQueryRows();

There are two versions of every method: the first returns the amount of the resource that has been used while the second version contains the word limit and returns the total amount of the resource that is available.

Limits Methods:
The following are methods for Limits. All methods are static.

System.debug('Limits.getAggregateQueries - '+ Limits.getAggregateQueries());
System.debug('Limits.getLimitAggregateQueries - '+ Limits.getLimitAggregateQueries());
System.debug('Limits.getCallouts - '+ Limits.getCallouts());
System.debug('Limits.getLimitCallouts - '+ Limits.getLimitCallouts());
System.debug('Limits.getCpuTime - '+ Limits.getCpuTime());
System.debug('Limits.getLimitCpuTime - '+ Limits.getLimitCpuTime());
System.debug('Limits.getDMLRows - '+ Limits.getDMLRows());
System.debug('Limits.getLimitDMLRows - '+ Limits.getLimitDMLRows());
System.debug('Limits.getDMLStatements - '+ Limits.getDMLStatements());
System.debug('Limits.getLimitDMLStatements - '+ Limits.getLimitDMLStatements());
System.debug('Limits.getEmailInvocations - '+ Limits.getEmailInvocations());
System.debug('Limits.getLimitEmailInvocations - '+ Limits.getLimitEmailInvocations());
System.debug('Limits.getFutureCalls - '+ Limits.getFutureCalls());
System.debug('Limits.getLimitFutureCalls - '+ Limits.getLimitFutureCalls());
System.debug('Limits.getHeapSize - '+ Limits.getHeapSize());
System.debug('Limits.getLimitHeapSize - '+ Limits.getLimitHeapSize());
System.debug('Limits.getMobilePushApexCalls - '+ Limits.getMobilePushApexCalls());
System.debug('Limits.getLimitMobilePushApexCalls - '+ Limits.getLimitMobilePushApexCalls());
System.debug('Limits.getQueries - '+ Limits.getQueries());
System.debug('Limits.getLimitQueries - '+ Limits.getLimitQueries());
System.debug('Limits.getQueryLocatorRows - '+ Limits.getQueryLocatorRows());
System.debug('Limits.getLimitQueryLocatorRows - '+ Limits.getLimitQueryLocatorRows());
System.debug('Limits.getQueryRows - '+ Limits.getQueryRows());
System.debug('Limits.getLimitQueryRows - '+ Limits.getLimitQueryRows());
System.debug('Limits.getQueueableJobs - '+ Limits.getQueueableJobs());
System.debug('Limits.getLimitQueueableJobs - '+ Limits.getLimitQueueableJobs());
System.debug('Limits.getSoslQueries - '+ Limits.getSoslQueries());
System.debug('Limits.getLimitSoslQueries - '+ Limits.getLimitSoslQueries());

Insert Records in Salesforce by using JavaScript

In this article I’ll demonstrate how to insert record in Salesforce object by using javascript, in VF page without any standard or custom controller or by apex class.

By using AJAX Toolkit we can do this task easily. There are two types of AJAX Toolkit one is synchronous and another one is asynchronous call.

Here is a simple example of data insert using Javascript in Visualforce page. In below example I’m using synchronous call.
These are the steps to insert data using Javascript:

  1. Connecting to the AJAX Toolkit(By using login methods or getting Session_ID).
  2. Embedding the API methods in JavaScript.
  3. Processing the results.

Sample Code:

<apex:page id="pg">
    <script src="/soap/ajax/20.0/connection.js" type="text/javascript"></script>
	<script>
		function insertAcc(){

			// Getting Session ID.
			sforce.connection.sessionId = "{!$Api.Session_ID}";

			//Creating New Account Record.
			var account = new sforce.SObject("Account");

			//Getting Account Name from inputText.
			account.Name = document.getElementById("pg:frm:pb:pbs:pbsi:txtName").value;

			//Create method 
			var result = sforce.connection.create([account]);

			//Getting result 
			if (result[0].getBoolean("success")) {
				alert("New Account is created with id " + result[0].id);
			}
			else {
				alert("failed to create new Account " + result[0]);
			}
		}
	</script>
	<apex:form id="frm">
		<apex:pageBlock title="Insert Account" tabStyle="Account" id="pb">
			<apex:pageBlockSection title="Account Name" columns="1" id="pbs">
				<apex:pageBlockSectionItem id="pbsi">
					<apex:outputLabel value="Name" />
					<apex:inputText title="Name" id="txtName" />
				</apex:pageBlockSectionItem>
			</apex:pageBlockSection> 
			<apex:pageBlockButtons>
				<apex:commandButton onclick="return insertAcc();" value="Save"/>
			</apex:pageBlockButtons>
		</apex:pageBlock>
	</apex:form>
</apex:page>

URL Class in Salesforce

//Create a new account called "Test Account" that we will create a link for later.
Account acc = new Account(Name = 'Test Account');
Insert acc;

//Get the base URL.
String baseURL = URL.getSalesforceBaseUrl().toExternalForm();
System.debug('Base URL: ' + baseURL);       

//Get the URL for the current request.
String currentReqURL = URL.getCurrentRequestUrl().toExternalForm();
System.debug('Current request URL: ' + currentReqURL);        

//Create the account URL from the base URL.
String accURL = URL.getSalesforceBaseUrl().toExternalForm() + '/' + acc.Id;
System.debug('URL of a particular account: ' + accURL); 

//Get some parts of the base URL.
System.debug('Host: ' + URL.getSalesforceBaseUrl().getHost());   
System.debug('Protocol: ' + URL.getSalesforceBaseUrl().getProtocol());

//Get the query string of the current request.
System.debug('Query: ' + URL.getCurrentRequestUrl().getQuery());

Generate Json Data Using Apex in Salesforce

Child Class:

public class Child{

    public String Name;
    
    public Child(String name) {
        this.Name = name;
    }
}

Parent Class:

public class Parent{

    public Child[] ChildRecords;
    public String Name;
    
    public Parent(String Name) {
        this.Name = name;
        ChildRecords = new Child[0];
    }
}

Pass parameters to above class using below code:

//Select Account Id from Account Object
String accountId = '0012800001A4UgG';

//Select Account & Contact Records
Account acc = [SELECT Id, Name, (SELECT Id, Name FROM Contacts) FROM Account WHERE Id =: accountId];

//Create a parent record
Parent par = new Parent(acc.Name);

//Loop on Contacts
for(Contact con: acc.Contacts) {
    par.childRecords.add(new Child(con.Name));
}

//Get the Json data
String jsonData = JSON.serialize(par);
System.debug('JsonData-' + jsonData);

Here is the debug log snapshot of Json data:
Json Data

Note: This is the sample class. You can modify it as per your requirement.

Salesforce HTTP Status code and Error Responses

HTTP Status Code Description
200 “OK” success code, for GET,PATCH or HEAD request.
201 “Created” success code, for POST request.
204 “No Content” success code, for DELETE request.
300 The value returned when an external ID exists in more than one record. The response body contains the list of matching records.
304 The request content has not changed since a specified date and time. The date and time is provided in a “If-Modified-Since” header.
400 The request could not be understood, usually because the ID is not valid for the particular resource. For example, if you use a userId where a groupId is required, the request returns 400.
401 The session ID or OAuth token has expired or is invalid. Or, if the request is made by a guest user, the resource isn’t accessible to guest users. The response body contains the message and errorCode.
403 The request has been refused. Verify that the context user has the appropriate permissions to access the requested data, or that the context user is not an external user.
404 Either the specified resource was not found, or the resource has been deleted.
405 The method specified in the Request-Line isn’t allowed for the resource specified in the URI.
409 A conflict has occurred. For example, an attempt was made to update a request to join a group, but that request had already been approved or rejected.
412 A precondition has failed. For example, in a batch request, if haltOnError is true and a subrequest fails, subsequent subrequests return 412.
415 The entity in the request is in a format that’s not supported by the specified method.
500 An error has occurred within Force.com, so the request could not be completed. Contact Salesforce Customer Support.
503 Too many requests in an hour or the server is down for maintenance.