Job

Class

Jobs represent long running processing tasks running on ArcGIS Services. Typically these represent complex analysis tasks such as geoprocessing tasks, logistics analysis such as fleet routing or spatial analysis tasks.

To create a Job, use the Job.submitJob method which will return an instance of the Job class with a unique id.

If you have an existing job you can use Job.serialize and Job.deserialize to save job information as a string and recreate the job to get results later.

Use dark colors for code blocksCopy
import { Job,  JOB_STATUSES  } from "@esri/arcgis-rest-request";

const job  = async Job.submitJob(options);

// will automatically wait for job completion and get results when the job is finished.
job.getAllResults().then((results) => {console.log(results)})

// watch for all status updates
job.on("status", ({jobStatus}) => {console.log(job.status)})

By default event monitoring is started when you call Job.waitForCompletion, Job.getAllResults or, Job.getResult and stops automatically when those promises complete. Use Job.startEventMonitoring and Job.stopEventMonitoring to manually start and stop event monitoring outside those methods. Starting monitoring with Job.startEventMonitoring will not stop monitoring when Job.waitForCompletion, Job.getAllResults or, Job.getResult complete.

Constructors

constructor

Class Constructor

new Job(options: IJobOptions): Job

Parameters

Parameter	Type
`options`	IJobOptions

Returns

Job

Properties

Property	Type	Notes
`authentication`	`string \| IAuthenticationManager`	Authentication manager or access token to use for all job requests.
`id`	`string`	The job id indicating the specific job.
`url`	`string`	The base URL of the job.

authentication

Class Property

authentication: string | IAuthenticationManager

Authentication manager or access token to use for all job requests.

id

Class Property

id: string

The job id indicating the specific job.

url

Class Property

url: string

The base URL of the job.

Accessors

Accessor	Returns	Notes
`get isMonitoring()`	`boolean`	Returns `true` if the job is polling for status changes.
`get pollingRate()`	`number`	The rate at which event monitoring is occurring in milliseconds.

isMonitoring

Class Accessor

get isMonitoring(): boolean

Returns true if the job is polling for status changes.

Returns

boolean

pollingRate

Class Accessor

get pollingRate(): number

The rate at which event monitoring is occurring in milliseconds.

Returns

number

Methods

Method	Returns	Notes
`cancelJob()`	`Promise<any>`	Cancels the job request and voids the job.
`getAllResults()`	`Promise<any>`	Gets all the results from a successful job by ordering all the result paramUrl requests and calling each of them until all of them are complete and returns an object with all the results.
`getJobInfo()`	`Promise<IJobInfo>`	Retrieves the status of the current job.
`getResult(result)`	`Promise<any>`	Get the specific results of a successful job by result name. To get all results see `Job.getAllResults`.
`off(eventName, handler)`	`void`	A handler that will remove a listener after its emitted and returns a custom handler.
`on(eventName, handler)`	`void`	A handler that listens for an eventName and returns custom handler.
`once(eventName, handler)`	`void`	A handler that listens for an event once and returns a custom handler.
`serialize()`	`string`	Converts the `Job` to a JSON string. You can rehydrate the state of the `Job` with `Job.deserialize`.
`startEventMonitoring(pollingRate)`	`void`	Starts the event polling if the user enables the startMonitoring param.
`stopEventMonitoring()`	`void`	Stops the event polling rate. This is can only be enabled if the user calls this method directly.
`toJSON()`	`IJobOptions`	Formats the requestOptions to JSON format.
`waitForCompletion()`	`Promise<IJobInfo>`	Checks for job status and if the job status is successful it resolves the job information. Otherwise will throw a `ArcGISJobError` if it encounters a cancelled or failure status in the job.
`deserialize(serializeString, options?)`	`Promise<Job>`
`fromExistingJob(options)`	`Promise<Job>`	Creates a new instance of `Job` from an existing job id.
`submitJob(requestOptions)`	`Promise<Job>`	Submits a job request that will return a new instance of `Job`.

cancelJob

Class Method

cancelJob(): Promise<any>

Cancels the job request and voids the job.

Returns

Promise<any>

An object that has job id, job status and messages array sequencing the status of the cancellation being submitted and completed.

getAllResults

Class Method

getAllResults(): Promise<any>

Gets all the results from a successful job by ordering all the result paramUrl requests and calling each of them until all of them are complete and returns an object with all the results.

If monitoring is disabled it will be enabled until the job classes resolves or rejects this promise.

Use dark colors for code blocksCopy
Job.submitJob(options)
 .then((job) => {
   return job.getAllResults();
 }).then(allResults => {
   console.log(allResults);
 }).catch(e => {
   if(e.name === "ArcGISJobError") {
     console.log("Something went wrong while running the job", e.jobInfo);
   }
 })

Will throw a ArcGISJobError if it encounters a cancelled or failure status in the job.

Returns

Promise<any>

An object representing all the results from a job.

getJobInfo

Class Method

getJobInfo(): Promise<IJobInfo>

Retrieves the status of the current job.

Returns

Promise<IJobInfo>

An object with the job id and jobStatus.

getResult

Class Method

getResult(result: string): Promise<any>

Get the specific results of a successful job by result name. To get all results see Job.getAllResults.

If monitoring is disabled it will be enabled until the job classes resolves or rejects this promise.

Use dark colors for code blocksCopy
Job.submitJob(options)
 .then((job) => {
   return job.getResult("result_name")
 }).then(result => {
   console.log(result);
 }).catch(e => {
   if(e.name === "ArcGISJobError") {
     console.log("Something went wrong while running the job", e.jobInfo);
   }
 })

Will throw a ArcGISJobError if it encounters a cancelled or failure status in the job.

Parameters

Parameter	Type	Notes
`result`	string	The name of the result that you want to retrieve.

Returns

Promise<any>

An object representing the individual result of the job.

off

Class Method

off(eventName: string, handler: (e: IJobInfo) => void): void

A handler that will remove a listener after its emitted and returns a custom handler.

Parameters

Parameter	Type	Notes
`eventName`	string	A string of what event to listen for.
`handler`	(e: IJobInfo) => void	A function of what to do when eventName was called.

Returns

void

on

Class Method

on(eventName: string, handler: (e: IJobInfo) => void): void

A handler that listens for an eventName and returns custom handler.

Parameters

Parameter	Type	Notes
`eventName`	string	A string of what event to listen for.
`handler`	(e: IJobInfo) => void	A function of what to do when eventName was called.

Returns

void

once

Class Method

once(eventName: string, handler: (e: IJobInfo) => void): void

A handler that listens for an event once and returns a custom handler.

Parameters

Parameter	Type	Notes
`eventName`	string	A string of what event to listen for.
`handler`	(e: IJobInfo) => void	A function of what to do when eventName was called.

Returns

void

serialize

Class Method

serialize(): string

Converts the Job to a JSON string. You can rehydrate the state of the Job with Job.deserialize.

Returns

string

A JSON string representing the Job.

startEventMonitoring

Class Method

startEventMonitoring(pollingRate: number): void

Starts the event polling if the user enables the startMonitoring param.

Parameters

Parameter	Type	Default	Notes
`pollingRate`	number	`...`	Able to pass in a specific number or will default to 5000.

Returns

void

stopEventMonitoring

Class Method

stopEventMonitoring(): void

Stops the event polling rate. This is can only be enabled if the user calls this method directly.

Returns

void

toJSON

Class Method

toJSON(): IJobOptions

Formats the requestOptions to JSON format.

Returns

IJobOptions

The Job as a plain JavaScript object.

waitForCompletion

Class Method

waitForCompletion(): Promise<IJobInfo>

Checks for job status and if the job status is successful it resolves the job information. Otherwise will throw a ArcGISJobError if it encounters a cancelled or failure status in the job.

Use dark colors for code blocksCopy
Job.submitJob(options)
 .then((job) => {
   return job.waitForCompletion();
 })
.then((jobInfo) => {
   console.log("job finished", e.jobInfo);
 })
.catch(e => {
   if(e.name === "ArcGISJobError") {
     console.log("Something went wrong while running the job", e.jobInfo);
   }
 })

Returns

Promise<IJobInfo>

An object with a successful job status, id, and results.

deserialize

static

Class Method

deserialize(serializeString: string, options?: IJobOptions): Promise<Job>

Parameters

Parameter	Type
`serializeString`	string
`options`	IJobOptions

Returns

Promise<Job>

fromExistingJob

static

Class Method

fromExistingJob(options: IJobOptions): Promise<Job>

Creates a new instance of Job from an existing job id.

Parameters

Parameter	Type	Notes
`options`	IJobOptions	Requires request endpoint url and id from an existing job id.

Returns

Promise<Job>

An new instance of Job class with options.

submitJob

static

Class Method

submitJob(requestOptions: ISubmitJobOptions): Promise<Job>

Submits a job request that will return a new instance of Job.

Parameters

Parameter	Type	Notes
`requestOptions`	ISubmitJobOptions	Requires url and params from requestOptions.

Returns

Promise<Job>

An new instance of Job class with the returned job id from submitJob request and requestOptions;

ArcGIS REST JSAPI Reference

Job

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