As a language, Apex is:
- Data manipulation language (DML) calls, such as INSERT, UPDATE, and DELETE, that include built-in DmlException handling
- Inline Salesforce Object Query Language (SOQL) and Salesforce Object Search Language (SOSL) queries that return lists of sObject records
- Looping that allows for bulk processing of multiple records at a time
Table of Contents
What is Salesforce apex?
What is Apex? Apex is a strongly typed, object-oriented programming language that allows developers to execute flow and transaction control statements on Salesforce servers in conjunction with calls to the API.
What is an apex transaction?
An Apex transaction represents a set of operations that are executed as a single unit. All DML operations in a transaction either complete successfully, or if an error occurs in one operation, the entire transaction is rolled back and no data is committed to the database.
What are transaction boundaries in Salesforce apex?
The boundary of a transaction can be a trigger, a class method, an anonymous block of code, a Visualforce page, or a custom Web service method. Because Apex runs in a multitenant environment, the Apex runtime engine strictly enforces limits so that runaway Apex code or processes don’t monopolize shared resources.
What are the disadvantages of apex in Salesforce?
Moreover, Apex allows its developers to access the Salesforce.com backend database to third-party Saas applications. Although Apex has no major disadvantages, there are few limitations which are mentioned below: It is not possible to create threads in Apex, unlike other programming languages.
What is transaction control in Apex?
All requests are delimited by the trigger, class method, Web Service, Visualforce page or anonymous block that executes the Apex code. If the entire request completes successfully, all changes are committed to the database.
How does Apex work in Salesforce?
When a developer writes and saves Apex code to the platform, the platform application server first compiles the code into an abstract set of instructions that can be understood by the Apex runtime interpreter, and then saves those instructions as metadata.
What are transaction limits in Apex?
Per-Transaction Apex LimitsDescriptionSynchronous LimitAsynchronous LimitMaximum CPU time on the Salesforce servers 510,000 milliseconds60,000 millisecondsMaximum execution time for each Apex transaction10 minutes10 minutesMaximum number of push notification method calls allowed per Apex transaction101016 more rows
When should Apex be used in Salesforce?
When Should We use Apex? Apex allows its developers to create complex CRM applications that provide access to the Salesforce database and client-server interfaces to create a third-party SaaS application. It also allows customizing pre-built applications according to complex business requirements.
What API is used in Apex?
Required Editions and User PermissionsAPI NameProtocolCommunicationConnect REST APIRESTSynchronous (photos are processed asynchronously)Apex REST APIRESTSynchronousApex SOAP APISOAP (WSDL)SynchronousAnalytics REST APIRESTSynchronous7 more rows
What is Apex and Visualforce?
Apex and Visual Force. Visualforce is a component-based user interface (UI) framework that allows the development of strong and reusable interfaces. Apex is a platform for developing software as a service (SaaS) applications based on the CRM functionality of Salesforce.
What is a governor in Salesforce?
Simply put, Salesforce Governor Limits are usage caps enforced by Salesforce to ensure efficient processing. They allow for multiple users of the platform without impeding performance. There are many different types of governor limits, some of which are tied to your Salesforce edition.
How do I query more than 10000 records in Salesforce?
You could use batch apex, and it is the only way by which you can query some millions of records without hitting the governor limits. You can find the document for writing batch apex here. Thanks. you can fetch the records in batches in 200 (the implicit query more pattern).
What is SOSL and SOQL in Salesforce?
A SOQL query is the equivalent of a SELECT SQL statement and searches the org database. SOSL is a programmatic way of performing a text-based search against the search index. Whether you use SOQL or SOSL depends on whether you know which objects or fields you want to search, plus other considerations.
What is an Apex call?
An Apex callout enables you to tightly integrate your Apex with an external service by making a call to an external Web service or sending a HTTP request from Apex code and then receiving the response. Apex provides integration with Web services that utilize SOAP and WSDL, or HTTP services (RESTful services).
What are the different data types in Apex?
Apex – Data TypesPrimitive (Integer, Double, Long, Date, Datetime, String, ID, or Boolean)Collections (Lists, Sets and Maps) (To be covered in Chapter 6)sObject.Enums.Classes, Objects and Interfaces (To be covered in Chapter 11, 12 and 13)
What is Apex and its features?
Apex is a proprietary language developed by the Salesforce.com. As per the official definition, Apex is a strongly typed, object-oriented programming language that allows developers to execute the flow and transaction control statements on the Force.com platform server in conjunction with calls to the Force.com API.
What is Apex in Salesforce?
What is Apex? Apex is a strongly typed, object-oriented programming language that allows developers to execute flow and transaction control statements on Salesforce servers in conjunction with calls to the API.
What is Apex based on?
Apex is based on familiar Java idioms, such as variable and expression syntax, block and conditional statement syntax, loop syntax, object and array notation. Where Apex introduces new elements, it uses syntax and semantics that are easy to understand and encourage efficient use of the Lightning Platform.
What is Apex language?
Apex is a strongly typed language that uses direct references to schema objects such as object and field names. It fails quickly at compile time if any references are invalid. It stores all custom field, object, and class dependencies in metadata to ensure that they are not deleted while required by active Apex code.
Is Apex a multitenant?
Hosted. Apex is interpreted, executed, and controlled entirely by the Lightning Platform. Multitenant aware. Like the rest of the Lightning Platform, Apex runs in a multitenant environment. So, the Apex runtime engine is designed to guard closely against runaway code, preventing it from monopolizing shared resources.
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What is an Apex transaction?
Apex Transactions. An Apex transaction represents a set of operations that are executed as a single unit.
Why does Apex run in a multitenant environment?
Because Apex runs in a multitenant environment, the Apex runtime engine strictly enforces limits so that runaway Apex code or processes don’t monopolize shared resources. If some Apex code exceeds a limit, the associated governor issues a runtime exception that can’t be handled. Set Up Governor Limit Email Warnings.