Update developer documentation
This commit is contained in:
Damian Mooyman
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@ -24,12 +24,13 @@ Our web-based [PHP installer](installation/) can check if you meet the requireme
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* `/dev/urandom`
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* [`mcrypt_create_iv()`](http://php.net/manual/en/function.mcrypt-create-iv.php)
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* CAPICOM Utilities (`CAPICOM.Utilities.1`, Windows only)
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* Required modules: dom, gd2, fileinfo, hash, iconv, mbstring, mysqli (or other database driver), session, simplexml, tokenizer, xml.
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* Required modules: ctype, dom, fileinfo, hash, intl, mbstring, session, simplexml, tokenizer, xml.
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* At least one from each group of extensions:
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* Image library extension (gd2, imagick)
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* DB connector library (pdo, mysqli, pgsql)
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* Recommended configuration
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safe_mode = Off
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magic_quotes_gpc = Off
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memory_limit = 48M
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* Dev (local development for running test framework): memory_limit 512MB
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* Production: memory_limit = 64M
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* See [phpinfo()](http://php.net/manual/en/function.phpinfo.php) for more information about your environment
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* One of the following databases:
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@ -27,9 +27,9 @@ First we're telling Homebrew about some new repositories to get the PHP installa
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brew tap homebrew/dupes
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brew tap homebrew/php
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We're installing PHP 5.5 here, with the required `mcrypt` module:
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We're installing PHP 5.6 here, with the required `mcrypt` module:
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brew install php55 php55-mcrypt
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brew install php56 php56-mcrypt php56-intl php56-apcu
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There's a [Homebrew Troubleshooting](https://github.com/Homebrew/homebrew/blob/master/share/doc/homebrew/Troubleshooting.md) guide if Homebrew doesn't work out as expected (run `brew update` and `brew doctor`).
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@ -18,25 +18,30 @@ Directory | Description
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We're using `<mysite>` as an example - arbitrary directory-names are allowed, as long as they don't collide with
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existing modules or the directories lists in "Core Structure".
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| Directory | Description |
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| --------- | ----------- |
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| Directory | Description |
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| --------- | ----------- |
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| `<mysite>/` | This directory contains all of your code that defines your website. |
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| `<mysite>/_config` | YAML configuration specific to your application |
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| `<mysite>/code` | PHP code for model and controller (subdirectories are optional) |
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| `<mysite>/templates` | HTML [templates](/developer_guides/templates) with *.ss-extension |
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| `<mysite>/src` | PHP code for model and controller (subdirectories are optional) |
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| `<mysite>/tests` | PHP Unit tests |
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| `<mysite>/templates` | HTML [templates](/developer_guides/templates) with *.ss-extension for the `$default` theme |
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| `<mysite>/css ` | CSS files |
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| `<mysite>/images ` | Images used in the HTML templates |
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| `<mysite>/javascript` | Javascript and other script files |
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| `<mysite>/javascript` | Javascript and other script files |
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| `<mysite>/client` | More complex projects can alternatively contain frontend assets in a common `client` folder |
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| `<mysite>/themes/<yourtheme>` | Custom nested themes (note: theme structure is described below) |
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Check our [JavaScript Coding Conventions](javascript_coding_conventions) for more details
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on folder and file naming in SilverStripe core modules.
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## Themes Structure
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| `themes/simple/` | Standard "simple" theme |
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| ------------------ | --------------------------- |
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| `themes/yourtheme/` | The themes folder can contain more than one theme - here's your own |
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| Directory | Description |
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| ------------------ | --------------------------- |
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| `themes/simple/` | Standard "simple" theme |
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| `themes/<yourtheme>/` | Custom theme base directory |
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| `themes/<yourtheme>/templates` | Theme templates |
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| `themes/<yourtheme>/css` | Theme CSS files |
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See [themes](/developer_guides/templates/themes)
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@ -77,7 +82,7 @@ Example Forum Documentation:
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| `forum/docs/en/` | English documentation |
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| `forum/docs/en/index.md` | Documentation homepage. Should provide an introduction and links to remaining docs |
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| `forum/docs/en/Getting_Started.md` | Documentation page. Naming convention is Uppercase and underscores. |
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| `forum/docs/en//_images/` | Folder to store any images or media |
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| `forum/docs/en/_images/` | Folder to store any images or media |
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| `forum/docs/en/Some_Topic/` | You can organise documentation into nested folders. Naming convention is Uppercase and underscores. |
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|`forum/docs/en/04_Some_Topic/00_Getting_Started.md`|Structure is created by use of numbered prefixes. This applies to nested folders and documentations pages, index.md should not have a prefix.|
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@ -0,0 +1,143 @@
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title: App Object and Kernel
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summary: Provides bootstrapping and entrypoint to the SilverStripe application
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# Kernel
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The [api:Kernel] object provides a container for the various manifests, services, and components
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which a SilverStripe application must have available in order for requests to be executed.
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This can be accessed in user code via Injector
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:::php
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$kernel = Injector::inst()->get(Kernel::class);
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echo "Current environment: " . $kernel->getEnvironment();
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## Kernel services
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Services accessible from this kernel include:
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* getContainer() -> Current [api:Injector] service
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* getThemeResourceLoader() -> [api:ThemeResourceLoader] Service for loading of discovered templates.
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Also used to contain nested theme sets such as the `$default` set for all root module /templates folders.
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* getEnvironment() -> String value for the current environment. One of 'dev', 'live' or 'test'
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Several meta-services are also available from Kernel (which are themselves containers for
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other core services) but are not commonly accessed directly:
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* getClassLoader() -> [api:ClassLoader] service which handles the class manifest
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* getModuleLoader() -> [api:ModuleLoadel] service which handles module registration
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* getConfigLoader() -> [api:ConfigLoader] Service which assists with nesting of [api:Config] instances
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* getInjectorLoader() -> [api:InjectorLoader] Service which assists with nesting of [api:Injector] instances
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## Kernel nesting
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As with Config and Injector the Kernel can be nested to safely modify global application state,
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and subsequently restore state. Unlike those classes, however, there is no `::unnest()`. Instead
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you should call `->activate()` on the kernel instance you would like to unnest to.
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:::php
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$oldKernel = Injector::inst()->get(Kernel::class);
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try {
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// Injector::inst() / Config::inst() are automatically updated to the new kernel
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$newKernel = $oldKernel->nest();
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Config::modify()->set(Director::class, 'alternate_base_url', '/myurl');
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}
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finally {
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// Any changes to config (or other application state) have now been reverted
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$oldKernel->activate();
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}
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# Application
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An application represents a basic excution controller for the top level application entry point.
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The role of the application is to:
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- Control bootstrapping of a provided kernel instance
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- Handle errors raised from an application
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- Direct requests to the request handler, and return a valid response
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## HTTPApplication
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The HTTPApplication provides a specialised application implementation for handling HTTP Requests.
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This class provides basic support for HTTP Middleware, such as [api:ErrorControlChainMiddleware].
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`main.php` contains the default application implementation.
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:::php
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<?php
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use SilverStripe\Control\HTTPApplication;
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use SilverStripe\Control\HTTPRequestBuilder;
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use SilverStripe\Core\CoreKernel;
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use SilverStripe\Core\Startup\ErrorControlChainMiddleware;
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require __DIR__ . '/src/includes/autoload.php';
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// Build request and detect flush
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$request = HTTPRequestBuilder::createFromEnvironment();
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// Default application
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$kernel = new CoreKernel(BASE_PATH);
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$app = new HTTPApplication($kernel);
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$app->addMiddleware(new ErrorControlChainMiddleware($app));
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$response = $app->handle($request);
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$response->output();
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Users can customise their own application by coping the above to a file in `mysite/main.php`, and
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updating their `.htaccess` to point to the new file.
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:::
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<IfModule mod_rewrite.c>
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# ...
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RewriteCond %{REQUEST_URI} ^(.*)$
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RewriteCond %{REQUEST_FILENAME} !-f
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RewriteRule .* mysite/main.php?url=%1 [QSA]
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# ...
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</IfModule>
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Note: This config must also be duplicated in the below template which provide asset routing:
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`silverstripe-assets/templates/SilverStripe/Assets/Flysystem/PublicAssetAdapter_HTAccess.ss`:
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:::ss
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<IfModule mod_rewrite.c>
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# ...
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# Non existant files passed to requesthandler
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RewriteCond %{REQUEST_URI} ^(.*)$
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RewriteCond %{REQUEST_FILENAME} !-f
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RewriteRule .* ../mysite/main.php?url=%1 [QSA]
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</IfModule>
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## Custom application actions
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If it's necessary to boot a SilverStripe kernel and application, but not do any
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request processing, you can use the Application::execute() method to invoke a custom
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application entry point.
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This may be necessary if using SilverStripe code within the context of a non-SilverStripe
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application.
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For example, the below will setup a request, session, and current controller,
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but will leave the application in a "ready" state without performing any
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routing.
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:::php
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$request = CLIRequestBuilder::createFromEnvironment();
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$kernel = new TestKernel(BASE_PATH);
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$app = new HTTPApplication($kernel);
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$app->execute($request, function (HTTPRequest $request) {
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// Start session and execute
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$request->getSession()->init();
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// Set dummy controller
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$controller = Controller::create();
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$controller->setRequest($request);
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$controller->pushCurrent();
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$controller->doInit();
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}, true);
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@ -78,21 +78,26 @@ can leave sensitive files exposed to public access (the `RewriteRule` conditions
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## Bootstrap
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All requests go through `framework/main.php`, which sets up the execution environment:
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The `constants.php` file is included automatically in any project which requires silverstripe/framework.
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This is included automatically when the composer `vendor/autoload.php` is included, and performs its
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tasks silently in the background.
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* Tries to locate an `.env`
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* Tries to locate an `.env`
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[configuration file](/getting_started/environment_management) in the webroot.
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* Sets constants based on the filesystem structure (e.g. `BASE_URL`, `BASE_PATH` and `TEMP_FOLDER`)
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* Normalizes the `url` parameter in preparation for handing it off to `Director`
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* Connects to a database, based on information stored in the global `$databaseConfig` variable.
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The configuration is either defined in your `_config.php`, or through `.env`
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* Sets up [error handlers](../debugging/error_handling)
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* Optionally continues a [session](../cookies_and_sessions/sessions) if the request already contains a session identifier
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* Loads manifests for PHP classes, templates, as well as any [YAML configuration](../configuration).
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* Optionally regenerates these manifests (if a ["flush" query parameter](flushable) is set)
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* Executes all procedural configuration defined through `_config.php` in all discovered modules
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* Loads the Composer PHP class autoloader
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* Hands control over to [api:Director]
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* Sets constants based on the filesystem structure (e.g. `BASE_URL`, `BASE_PATH` and `TEMP_FOLDER`)
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All requests go through `framework/main.php`, which sets up the core [api:Kernel] and [api:HTTPApplication]
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objects. See [/developer_guides/execution_pipeline/app_object_and_kernel] for details on this.
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The main process follows:
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* Include `autoload.php`
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* Construct [api:HTTPRequest] object from environment.
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* Construct a `Kernel` instance
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* Construct a `HTTPApplication` instance
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* Add any necessary middleware to this application
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* Pass the request to the application, and request a response
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While you usually don't need to modify the bootstrap on this level, some deeper customizations like
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adding your own manifests or a performance-optimized routing might require it.
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@ -1463,6 +1463,7 @@ A very small number of methods were chosen for deprecation, and will be removed
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#### <a name="overview-orm-api"></a>ORM API Additions / Changes
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* Deprecated globals `$database` and `$databaseConfig`. Please use `DB::setConfig()` instead.
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* Deprecate `SQLQuery` in favour `SQLSelect`
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* `DataObject.many_many` 'through' relationships now support join dataobjects in place of
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automatically generated join tables. See the [/developer_guides/relations](datamodel relationship docs)
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