Future Apex is used to run processes in a separate thread, at a later time when system resources become available.<\/p>\n\n\n\n
A future method<\/b> runs in the background, asynchronously. You can call a future method for executing long-running operations, such as callouts to external Web services or any operation you\u2019d like to run in its own thread, on its own time. You can also use future methods to isolate DML operations on different sObject types to prevent the mixed DML error. Each future method is queued and executes when system resources become available. That way, the execution of your code doesn\u2019t have to wait for the completion of a long-running operation. A benefit of using future methods is that some governor limits are higher, such as SOQL query limits and heap size limits. You can call 50 future methods per transaction.<\/p>\n\n\n\n Future methods must be static methods, and can only return a void type. The specified parameters must be primitive data types, arrays of primitive data types, or collections of primitive data types. Notably, future methods can\u2019t take standard or custom objects as arguments. A common pattern is to pass the method a List of record IDs that you want to process asynchronously.<\/p>\n\n\n\n Public class AsyncClass{<\/p>\n\n\n\n @future<\/p>\n\n\n\n Public static void asyncMethod() {<\/p>\n\n\n\n \/\/future code goes here<\/p>\n\n\n\n }<\/p>\n\n\n\n }<\/p>\n\n\n\n Synchronous Class<\/b><\/u><\/i><\/p>\n\n\n\n public class SynchronusClass {<\/p>\n\n\n\n public static void synchronusMethod() {<\/p>\n\n\n\n PermissionSet perSet = new PermissionSet();<\/p>\n\n\n\n perSet.Label = ‘Apex Set’;<\/p>\n\n\n\n perSet.Name = ‘ApexSet’;<\/p>\n\n\n\n insert perSet;<\/p>\n\n\n\n AsynchronusClass.setupNonSetup();<\/p>\n\n\n\n }<\/p>\n\n\n\n }<\/p>\n\n\n\n Asynchronous Class<\/b><\/u><\/i><\/p>\n\n\n\n public class AsynchronusClass {<\/p>\n\n\n\n @future<\/p>\n\n\n\n public static void setupNonSetup() {<\/p>\n\n\n\n Opportunity opp = new Opportunity();<\/p>\n\n\n\n opp.Name = ‘Test Opp’;<\/p>\n\n\n\n opp.StageName = ‘Prospecting’;<\/p>\n\n\n\n opp.CloseDate = System.today();<\/p>\n\n\n\n insert opp;<\/p>\n\n\n\n }<\/p>\n\n\n\n }<\/p>\n\n\n\n Using query<\/b><\/u><\/i><\/p>\n\n\n\n SELECT Id, JobType, ApexClassId, Status, NumberOfErrors, MethodName FROM AsyncApexJob where id = ‘7075g00005cUGj7’<\/p>\n\n\n\n Use System.isFuture() when we want any apex code to execute only at the time of future call. System.isFuture() return a boolean value (True or False).<\/p>\n\n\n\n SynchronusClass.apxc public class SynchronusClass {<\/p>\n\n\n\n public static void synchronusMethod() {<\/p>\n\n\n\n if(System.isFuture()) {<\/p>\n\n\n\n System.debug(‘Run this at future’);<\/p>\n\n\n\n } else {<\/p>\n\n\n\n System.debug(‘Run this when future is not running’);<\/p>\n\n\n\n }<\/p>\n\n\n\n \/\/AsynchronusClass.setupNonSetup();<\/p>\n\n\n\n }<\/p>\n\n\n\n }<\/p>\n\n\n\n AsynchronusClass.apxc<\/b><\/i><\/u><\/p>\n\n\n\n public class AsynchronusClass {<\/p>\n\n\n\n @future<\/p>\n\n\n\n public static void setupNonSetup() {<\/p>\n\n\n\n SynchronusClass.synchronusMethod();<\/p>\n\n\n\n }<\/p>\n\n\n\n }<\/p>\n\n\n\n # Resources:<\/p>\n\n\n\n # Future Method <\/p>\n","protected":false},"excerpt":{"rendered":" Asynchronous Apex in Salesforce : Future Methods Future Apex is used to run processes in a separate thread, at a later time when system resources become available. A future method runs in the background, asynchronously. You can call a future method for executing long-running operations, such as callouts to external Web services or any operation…<\/p>\n","protected":false},"author":2,"featured_media":83,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,15],"tags":[],"class_list":["post-211","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apex","category-asynchronous"],"yoast_head":"\nThings to Remember:<\/i><\/b><\/h3>\n\n\n\n
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# Future Method Syntax:<\/b><\/span><\/i><\/h3>\n\n\n\n
public class MyClass {\n @future<\/b>\n public static void myFutureMethod(List<Id> recordIds) {\n List<Account> accounts = [Select Id, Name from Account Where Id IN :recordIds];\n \/\/ Your code here\n }\n}\n<\/code><\/pre>\n<\/div>\n\n\n\nHow to define a method as future?<\/h3>\n\n\n\n
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What is a Mixed DML Exception?<\/h3>\n\n\n\n
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How to resolve Mixed DML Exception?<\/h3>\n\n\n\n
How to track future methods?<\/h3>\n\n\n\n
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What is System.isFuture()?<\/h3>\n\n\n\n
<\/u><\/i><\/b><\/p>\n\n\n\nWhat is @future(callout=true)?<\/h3>\n\n\n\n
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Advantages and Disadvantages of Future Methods:<\/h3>\n\n\n\n
Advantages of @future annotation:<\/h4>\n\n\n\n
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Disadvantages with @future annotation:<\/h4>\n\n\n\n
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Future Method – Video Tutorial:<\/span><\/h3>\n\n\n\n