Google Apps Script Calendar Service: How to avoid exceeding maximum execution time?

问题

I need to edit a few hundred or even a few thousand calendar events through Google Apps Script. It is about just minor changes to title (event.setTitle()) and description (event.setDescription()), nothing fancy. Trying with about 600 events the maximum execution time of 360 seconds is already exceeded.

var cal = CalendarApp.getCalendarById("Calendar Id");
var startTime = new Date(1850, 0, 1);
var endTime = new Date(2100, 0, 1);
var events = cal.getEvents(startTime, endTime);
for (var i = 0; i < events.length; i++) {
  events[i].setTitle(events[i].getTitle() + " something");
  events[i].setDescription(events[i].getDescription() + " something else");
}

How to process the events in several chunks successively?

回答1:

Answer:

Use PropertiesService to save where you got to so you can continue where you left of on next run.

Code:

You can use a PropertiesService key value pair to save the value of the count through events[]:

function renameEvents() {
  var cal = CalendarApp.getCalendarById("Calendar Id");
  var startTime = new Date(1850, 0, 1);
  var endTime = new Date(2100, 0, 1);
  var events = cal.getEvents(startTime, endTime);
  var sp = PropertiesService.getScriptProperties();
  if (!(sp.getProperty("count")) || sp.getProperty("count") == 0) {
    var count = 0;
  else if ((sp.getProperty("count") > 0) {
    var count = sp.getProperty("count");
  }

  for (var i = count; i < events.length; i++) {
    events[i].setTitle(events[i].getTitle() + " something");
    events[i].setDescription(events[i].getDescription() + " something else");
    sp.setProperty("count", i)
  }
}

It'll make the script a little slower, but each time you run it it'll continue along the calendar events from where the last one stopped.

I hope this is helpful to you!

References:

Class PropertiesService | Apps Script | Google Developers

回答2:

I have previously used something similar to the following:

At the start of each loop check that a sufficient buffer time is available to complete the loop.

Update the buffer time whenever a single loop time exceeds it.

Use the PropertiesService to store both the buffer and the last index.

var cal = CalendarApp.getCalendarById("Calendar Id");
var startTime = new Date(1850, 0, 1);
var endTime = new Date(2100, 0, 1);
var events = cal.getEvents(startTime, endTime);
var ps = PropertiesService.getScriptProperties();
var startIndex = ps.getProperty('lastIndex') || 0;
var buffer = ps.getProperty('buffer') || 100;

var startTime = new Date();
var maxTime = 1000*60*6; //6 mins


for (var i = startIndex; i < events.length; i++) {
  var loopStart = new Date()
  if (loopStart - startTime > (maxTime-buffer) ) {
     ps.setProperty('lastIndex', i);
     break;
  }
  events[i].setTitle(events[i].getTitle() + " something");
  events[i].setDescription(events[i].getDescription() + " something else");
  var loopTime = new Date() - loopStart;
  if (loopTime  > buffer ) buffer = loopTime * 1.5
}

ps.setProperty('buffer',buffer)

来源：https://stackoverflow.com/questions/60834955/google-apps-script-calendar-service-how-to-avoid-exceeding-maximum-execution-ti

标签

javascript

google-apps-script

google-calendar-api