usePoller

Import

  import { mix, usePoller, BoltElement } from 'c/bolt';

Usage

export default class myLwc extends mix(
    [usePoller, {
      resolveCondition,
      wiredMethod,
      maxIteration,
      interval
    }],
    BoltElement
) { }

Methods

initPoller(params) : void

Name	Type	Description
resolveCondition	Tuple[Function, string] OR string OR Function	Condition to satisfy before stop polling
wiredMethod	string	Class property decorated by @wire containing Apex results to poll
maxIteration	number	Number of polls to execute
interval	number	Time between each poll

Example

Tuple as the resolve condition

export default class myLwc extends mix(
    [usePoller, {
      resolveCondition: [prop => prop === 'OK', 'status__c'],
      wiredMethod: 'apexResults',
      maxIteration: 10,
      interval: 1000
    }],
    BoltElement
) {
  @api recordId;
  @wire(apexMethod, {recordId: '$recordId'})
  apexResults;
  connectedCallback() {
    this.template.addEventListener('polling-end', (detail:{status, response}) => {
      if(status === 'OK') // doSomething
      if(status === 'POLLING_LIMIT_EXCEEDED') // doSomething
    })
  }
}

@auraEnabled(cacheable=true)
public static Case[] apexMethod(Id recordId) {
  return [SELECT status__c FROM Case WHERE Id =: recordId];
}

String as the resolve condition

export default class myLwc extends mix(
    [usePoller, {
      resolveCondition: 'isReceived__c',
      wiredMethod: 'apexResults',
      maxIteration: 10,
      interval: 1000
    }],
    BoltElement
) {
  @api recordId;
  @wire(apexMethod, {recordId: '$recordId'})
  apexResults;
  connectedCallback() {
    this.template.addEventListener('polling-end', (detail:{status, response}) => {
      if(status === 'OK') // doSomething
      if(status === 'POLLING_LIMIT_EXCEEDED') // doSomething
    })
  }
}

@auraEnabled(cacheable=true)
public static Case[] apexMethod(Id recordId) {
  return [SELECT isReceived__c FROM Case WHERE Id =: recordId AND isReceived__c = true];
}

Function as the resolve condition

export default class myLwc extends mix(
    [usePoller, {
      resolveCondition: record => record.status__c === 'OK' ? : 'firstEventReceived__c' : 'secondEventReceived__c',
      wiredMethod: 'apexResults',
      maxIteration: 10,
      interval: 1000
    }],
    BoltElement
) {
  @api recordId;
  @wire(apexMethod, {recordId: '$recordId'})
  apexResults;
  connectedCallback() {
    this.template.addEventListener('polling-end', (detail:{status, response}) => {
      if(status === 'OK') // doSomething
      if(status === 'POLLING_LIMIT_EXCEEDED') // doSomething
    })
  }
}

@auraEnabled(cacheable=true)
public static Case[] apexMethod(Id recordId) {
  return [SELECT firstEventReceived__c, secondEventReceived__c, status__c FROM Case WHERE Id =: recordId AND (firstEventReceived__c = true OR secondEventReceived__c = true)];
}

Attributes

POLLER_PROGRESS : number

Example

<lightning-progress-bar value={POLLER_PROGRESS} />

Events

polling-end @ this

Name	Type	Description
status	OK, POLLING_LIMIT_EXCEEDED	How the poller has ended
results	Record	Apex wired method results