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Caching in the Cloud with Google Apps Script’s ‘CacheService’

Google Code has launched a new “CacheService” (memcache) which allow for caching resources between script executions.

“Like the recently announced LockService, there are two kinds of caches: a public cache that is per-script, and a private cache which is per-user, per-script,” informed Drew Csillag, Drew is a Software Engineer and Manager at Google.

Adding he says “The private cache should be used to store user-specific data, while the public cache is used to store strings that should be accessible no matter who calls the script.”

The cache doesn’t guarantee that you won’t have to fetch it again sooner, but will make a best effort to retain it for that long, and expire it quickly after the time passes.

Now you can call getFeed() often and it won’t re-fetch the feed from the remote site on each script execution, resulting in improved performance.

Google CacheService

Csillag explains, So for example feed viewer/processor, you’d already have a function to retrieve and process the feed. In order to use the CacheService, you’d wrap it like this:

function getFeed() {
  var cache = CacheService.getPublicCache();
  var value = cache.get(“my rss feed”);
  if (value == null) {
    // code to fetch the contents of the feed and store it in value 
    // here (assumes value is a string) 

    // cache will be good for around 3600 seconds (1 hour)
    cache.put(“my rss feed”, value, 3600);
  return value;

Check this CacheService documentation for more information.

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