Apex Reference Guide

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Apex Reference Guide
Release Notes
Apex DML Operations
ApexPages Namespace
AppLauncher Namespace
Approval Namespace
Auth Namespace
Cache Namespace
Canvas Namespace
ChatterAnswers Namespace
CommerceExtension Namespace
CommerceOrders Namespace
CommercePayments Namespace
CommerceTax Namespace
Compression Namespace
ConnectApi Namespace
Context Namespace
Database Namespace
Datacloud Namespace
DataRetrieval Namespace
DataSource Namespace
DataWeave Namespace
Dom Namespace
EventBus Namespace
ExternalService Namespace
Flow Namespace
FormulaEval Namespace
fsccashflow Namespace
Functions Namespace
industriesNlpSvc
IndustriesDigitalLending Namespace
Invocable Namespace
IsvPartners Namespace
KbManagement Namespace
LxScheduler Namespace
Messaging Namespace
Metadata Namespace
PlaceQuote Namespace
Pref_center Namespace
Process Namespace
QuickAction Namespace
Reports Namespace
RevSalesTrxn Namespace
RichMessaging Namespace
Salesforce_Backup Namespace
Schema Namespace
Search Namespace
Sfc Namespace
Sfdc_Checkout Namespace
Sfdc_Enablement Namespace
sfdc_surveys Namespace
Site Namespace
Slack Namespace
Support Namespace
System Namespace
AccessLevel Class
AccessType Enum
Address Class
Answers Class
ApexPages Class
Approval Class
Assert Class
AsyncInfo Class
AsyncOptions Class
Blob Class
Boolean Class
BusinessHours Class
CallbackStatus Enum
Callable Interface
Cases Class
Collator Class
Comparable Interface
Comparator Interface
Continuation Class
Cookie Class
Crypto Class
Custom Metadata Type Methods
Custom Settings Methods
Database Class
Date Class
Datetime Class
Decimal Class
Domain Class
DomainCreator Class
DomainParser Class
DomainType Enum
Double Class
EmailMessages Class
EncodingUtil Class
Enum Methods
EventBus Class
Exception Class and Built-In Exceptions
ExternalServiceTest Class
FlexQueue Class
FlexQueue Methods
FeatureManagement Class
Formula Class
FormulaRecalcFieldError Class
FormulaRecalcResult Class
Http Class
HttpCalloutMock Interface
HttpRequest Class
HttpResponse Class
Id Class
Ideas Class
InstallHandler Interface
Integer Class
JSON Class
JSONGenerator Class
JSONParser Class
JSONToken Enum
Label Class
Limits Class
List Class
Location Class
LoggingLevel Enum
Long Class
Map Class
Matcher Class
Math Class
Messaging Class
MultiStaticResourceCalloutMock Class
Network Class
Object Class
OrgLimit Class
OrgLimits Class
PageReference Class
Packaging Class
Pattern Class
Queueable Interface
QueueableContext Interface
QueueableDuplicateSignature Class
QuickAction Class
Quiddity Enum
RemoteObjectController
Request Class
ResetPasswordResult Class
RestContext Class
RestRequest Class
RestResponse Class
SandboxPostCopy Interface
Schedulable Interface
SchedulableContext Interface
Schema Class
Search Class
Security Class
SelectOption Class
Set Class
Site Class
SObject Class
SObjectAccessDecision Class
SoqlStubProvider Class
StaticResourceCalloutMock Class
String Class
StubProvider Interface
System Class
Test Class
Time Class
TimeZone Class
Trigger Class
TriggerOperation Enum
Type Class
UninstallHandler Interface
URL Class
UserInfo Class
UserManagement Class
UUID Class
Version Class
WebServiceCallout Class
WebServiceMock Interface
XmlStreamReader Class
XmlStreamWriter Class
TerritoryMgmt Namespace
TxnSecurity Namespace
UserProvisioning Namespace
VisualEditor Namespace
Wave Namespace
Appendices
PDF

FlexQueue Class

Contains methods that reorder batch jobs in the Apex flex queue.

Namespace

System

Usage

You can place up to 100 batch jobs in a holding status for future execution. When system resources become available, the jobs are taken from the top of the Apex flex queue and moved to the batch job queue. Up to five queued or active jobs can be processed simultaneously for each org. When a job is moved out of the flex queue for processing, its status changes from Holding to Queued. Queued jobs are executed when the system is ready to process new jobs.

Use this class’s methods to reorder your Holding jobs in the flex queue. As best practice and for safe usage, a FlexQueue reorder method must be the final statement in a transaction.

Example

This example moves a job to the front of the flex queue so that it’s executed immediately. The job is moved by calling the System.FlexQueue.moveJobToFront() method with the high priority job ID as the parameter.
ID highPriorityJobId = Database.executeBatch(new HighPriorityBatchClass(), 200);
boolean jobMovedToFrontOfQueue = FlexQueue.moveJobToFront(highPriorityJobId);

FlexQueue Methods

The following are methods for FlexQueue.

moveAfterJob(jobToMoveId, jobInQueueId)

Moves the job with the ID jobToMoveId immediately after the job with the ID jobInQueueId in the flex queue. You can move jobToMoveId forward or backward in the queue. If either job isn’t in the queue, it throws an element-not-found exception. Returns true if the job is moved, or false if jobToMoveId is already immediately after jobInQueueId, so no change is made.

Signature

public static Boolean moveAfterJob(Id jobToMoveId, Id jobInQueueId)

Parameters

jobToMoveId
Type: Id
The ID of the job to move.
jobInQueueId
Type: Id
The ID of the job to move after.

Return Value

Type: Boolean

moveBeforeJob(jobToMoveId, jobInQueueId)

Moves the job with the ID jobToMoveId immediately before the job with the ID jobInQueueId in the flex queue. You can move jobToMoveId forward or backward in the queue. If either job isn’t in the queue, it throws an element-not-found exception. Returns true if the job is moved, or false if jobToMoveId is already immediately before jobInQueueId, so no change is made.

Signature

public static Boolean moveBeforeJob(Id jobToMoveId, Id jobInQueueId)

Parameters

jobToMoveId
Type: Id
The ID of the job to move.
jobInQueueId
Type: Id
The ID of the job to use as a reference point.

Return Value

Type: Boolean

moveJobToEnd(jobId)

Moves the specified job the end of the flex queue, to index position (size - 1). All jobs after the job’s starting position move one spot forward. If the job isn’t in the queue, it throws an element-not-found exception. Returns true if the job is moved, or false if the job is already at the end of the queue, so no change is made.

Signature

public static Boolean moveJobToEnd(Id jobId)

Parameters

jobId
Type: Id
The ID of the job to move.

Return Value

Type: Boolean

moveJobToFront(jobId)

Moves the specified job to the front of the flex queue, to index position 0. All other jobs move back one spot. If the job isn’t in the queue, it throws an element-not-found exception. Returns true if the job is moved, or false if the job is already at the front of the queue, so no change is made.

Signature

public static Boolean moveJobToFront(Id jobId)

Parameters

jobId
Type: Id
The ID of the job to move.

Return Value

Type: Boolean