Chapter: Updating an application
| « Installing an application | ^ Deploying a Jelix application |
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Your application is already running on your production server. Now you would like to update the application. Main steps are:
- Closing the application.
- updating files
- launching the update system of jelix
- removing all files in temp directories
- opening the application
Closing and opening an application ¶
It's often better to have a single web page saying that the application is not available, during an update process. Users could not then execute the application, and it's a good things, so modules won't act on a database that is not already updated (an update process is never instantaneous).
You have two choice to close the application.
Your system administrator may reconfigure the web server to redirect all http request to the web page showing the message or to change the document root. Or you may configure yourself your hosting to change the document root.
An other solution, is to use a mecanism into Jelix, which allows to close the application. It works only if you call checkAppOpened() in the entrypoints, before the call of jCoordinator.
To close the application, you have to create a file, var/config/CLOSED, containing nothing or a message.
Then Jelix displays the page lib/jelix/installer/closed.html. You can provide your own html page, by storing it into your application as install/closed.html.
To reopen the application, just remove the file var/config/CLOSED.
You can manipulate this file manually (if you have only a FTP access to your web site, this is the solution). or, if you have a command line access, you can call jelix commands: openapp and closeapp
$ php cmd.php closeapp
$ php cmd.php openapp
You can give a message to the closeapp command. It will replace the %message% tag into the closed.html file.
$ php cmd.php closeapp "Sorry, we are closed for the moment, a new version is comming."
Updating files ¶
The second step is to update files of your application. You could upload files into the directory, with FTP, SCP or with other tools. You could also launch an update with your prefered source code manager (svn update, hg pull -u, git pull -u...).
If you update manually, don't forget to remove deprecated files.
Launching the update ¶
Now, source files are ok, you have to update the application it self (database, configuration...).
The only thing you have to do, is to launch the installer, as you did when you installed the application for the first time. The Jelix installer (used by a wizard or an installation script of an application), can install and update modules.
With a wizard ¶
If you installed the application with a wizard, it won't probably work for an update, except if the documentation of the application says that you can use it. In this case, launch the corresponding script with your browser, and remove the file after the update.
With the application installer ¶
If there is a install/installer.php script, just launch it: open a console, go into the install/ directory, and then type php.exe installer.php.
With the jelix installer ¶
If there isn't wizard or dedicated installation script, open a console, go into the application directory and type php.exe cmd.php installapp.
By hand ¶
This is the case when the installation system has been deactivated into specifics projects (see the previous chapter about the installation). In this case, you have to update every thing needed by the application, "by hand", or by "home made" scripts.
Cleaning the temp directory ¶
- *You must always remove all files stored into the temp/yourapp/ directory.**, after an installation or an update, and before to execute the application.
