[jala-dev] Re: caching remote content
- From: <robert.gaggl@xxxxxx>
- To: <jala-dev@xxxxxxxxxxxxx>
- Date: Mon, 7 May 2007 16:01:03 +0200
hi anton,
using setInterval(Date.ONEMINUTE) defines that the cached remote content
object will "expire" one minute after it has been created. Note that
this does *not* mean that the remote content will be automatically
re-fetched if you create a new RemoteContent object with the same Url
after the expiry of the cached one. It basically just defines the time
when needsUpdate() of a RemoteContent instance returns true. So your
code needs to call update() whenever needsUpdate() returns true,
otherwise you'll be using the cached content forever. So a probably
better example for [1] would be:
Root.prototype.main_action = function() {
var remote = new jala.RemoteContent("http://zombo.com";);
if (remote.needsUpdate()) {
remote.setHeader("X-RemoteContent-Host", req.data.http_host);
remote.setInterval(Date.ONEMINUTE);
remote.update();
}
res.write(remote.toString());
return;
};
This way the remote content at the given url is fetched only once a
minute.
The second code example loops over all cached RemoteContent objects on
disk and removes those that expired, so the next time the remote content
will be re-retrieved and again cached locally on disk. This way you'll
only have those RemoteContent objects cached on disk that have actually
been used within the expiry interval.
robert
-----Original Message-----
From: jala-dev-bounce@xxxxxxxxxxxxx
[mailto:jala-dev-bounce@xxxxxxxxxxxxx] On Behalf Of Anton Pirker
Sent: Montag, 07. Mai 2007 15:27
To: jala-dev@xxxxxxxxxxxxx
Subject: [jala-dev] caching remote content
hi jala-folks!
I am just playing around with the RemoteContent object.
I have a question about the caching: When i use the sourcecode from the
example [1] in the module documentation, the content is cached for a
minute? Do i get that right?
What for is the second part [2] of the sample code?
Would be nice if some could bring in some light!
Thanks in advance,
Anton
[1] https://opensvn.csie.org/traccgi/jala/wiki/JalaModules#RemoteContent
Root.prototype.main_action = function() {
var remote = new jala.RemoteContent("http://zombo.com";);
remote.setHeader("X-RemoteContent-Host", req.data.http_host);
remote.setInterval(Date.ONEMINUTE);
remote.update();
res.write(remote.toString());
return;
};
[2]
https://opensvn.csie.org/traccgi/jala/wiki/JalaModules#RemoteContent:
global.scheduler = function() {
jala.RemoteContent.exec(function(remoteContent) {
if (remoteContent.needsUpdate()) {
remoteContent.clear();
}
return;
});
};
Other related posts:
