## Class TApplication

Description

TApplication class.

TApplication coordinates modules and services, and serves as a configuration context for all Prado components.

TApplication uses a configuration file to specify the settings of the application, the modules, the services, the parameters, and so on.

TApplication adopts a modular structure. A TApplication instance is a composition of multiple modules. A module is an instance of class implementing IModule interface. Each module accomplishes certain functionalities that are shared by all Prado components in an application. There are default modules and user-defined modules. The latter offers extreme flexibility of extending TApplication in a plug-and-play fashion. Modules cooperate with each other to serve a user request by following a sequence of lifecycles predefined in TApplication.

TApplication has four modes that can be changed by setting Mode property (in the application configuration file).

- Off mode will prevent the application from serving user requests.
- Debug mode is mainly used during application development. It ensures the cache is always up-to-date if caching is enabled. It also allows exceptions are displayed with rich context information if they occur.
- Normal mode is mainly used during production stage. Exception information will only be recorded in system error logs. The cache is ensured to be up-to-date if it is enabled.
- Performance mode is similar to Normal mode except that it does not ensure the cache is up-to-date.

TApplication dispatches each user request to a particular service which finishes the actual work for the request with the aid from the application modules.

TApplication maintains a lifecycle with the following stages:

- [construct] : construction of the application instance
- [initApplication] : load application configuration and instantiate modules and the requested service
- onBeginRequest : this event happens right after application initialization
- onAuthentication : this event happens when authentication is needed for the current request
- onAuthenticationComplete : this event happens right after the authentication is done for the current request
- onAuthorization : this event happens when authorization is needed for the current request
- onAuthorizationComplete : this event happens right after the authorization is done for the current request
- onLoadState : this event happens when application state needs to be loaded
- onLoadStateComplete : this event happens right after the application state is loaded
- onPreRunService : this event happens right before the requested service is to run
- runService : the requested service runs
- onSaveState : this event happens when application needs to save its state
- onSaveStateComplete : this event happens right after the application saves its state
- onPreFlushOutput : this event happens right before the application flushes output to client side.
- flushOutput : the application flushes output to client side.
- onEndRequest : this is the last stage a request is being completed
- [destruct] : destruction of the application instance

Modules and services can attach their methods to one or several of the above events and do appropriate processing when the events are raised. By this way, the application is able to coordinate the activities of modules and services in the above order. To terminate an application before the whole lifecycle completes, call completeRequest.

Examples:

- Create and run a Prado application:

       $application=new TApplication($configFile);
       $application->run();

- since: 3.0
- version: $Revision: $ $Date: $
- author: Qiang Xue <qiang.xue@gmail.com>

Located in /TApplication.php (line 112)

    TComponent
       |
       --TApplication

Class Constant Summary
CONFIGCACHE_FILE = 'config.cache'
CONFIG_FILE = 'application.xml'
GLOBAL_FILE = 'global.cache'
PAGE_SERVICE_ID = 'page'
RUNTIME_PATH = 'runtime'
STATE_DEBUG = 'Debug'
STATE_NORMAL = 'Normal'
STATE_OFF = 'Off'
STATE_PERFORMANCE = 'Performance'
Method Summary
TApplication __construct ([string $basePath = 'protected'], [boolean $cacheConfig = true])
void clearGlobalState (string $key)
void completeRequest ()
void flushOutput ()
IStatePersister getApplicationStatePersister ()
TAssetManager getAssetManager ()
TAuthorizationRuleCollection getAuthorizationRules ()
string getBasePath ()
ICache getCache ()
string getConfigurationFile ()
TErrorHandler getErrorHandler ()
TGlobalization getGlobalization ([boolean $createIfNotExists = true])
mixed getGlobalState (string $key, [mixed $defaultValue = null])
string getID ()
string getMode ()
IModule getModule (mixed $id)
array getModules ()
TPageService getPageService ()
TMap getParameters ()
THttpRequest getRequest ()
boolean getRequestCompleted ()
THttpResponse getResponse ()
string getRuntimePath ()
TSecurityManager getSecurityManager ()
IService getService ()
THttpSession getSession ()
string getUniqueID ()
IUser getUser ()
void initApplication (string 0, string 1)
void loadGlobals ()
void onAuthentication ()
void onAuthenticationComplete ()
void onAuthorization ()
void onAuthorizationComplete ()
void onBeginRequest ()
void onEndRequest ()
void onError (mixed $param)
void onLoadState ()
void onLoadStateComplete ()
void onPreFlushOutput ()
void onPreRunService ()
void onSaveState ()
void onSaveStateComplete ()
void run ()
void runService ()
void saveGlobals ()
void setApplicationStatePersister (IStatePersister $persister)
void setAssetManager (TAssetManager $value)
void setCache (ICache $cache)
void setErrorHandler (TErrorHandler $handler)
void setGlobalization (TGlobalization $glob)
void setGlobalState (string $key, mixed $value, [mixed $defaultValue = null])
void setID (string $value)
void setMode (string $value)
void setModule (string $id, IModule $module)
void setPageService (TPageService $service)
void setRequest (THttpRequest $request)
void setResponse (THttpResponse $response)
void setSecurityManager (TSecurityManager $sm)
void setSession (THttpSession $session)
void setUser (IUser $user)
Methods
Constructor __construct (line 285)

Constructor.

Sets application base path and initializes the application singleton. Application base path refers to the root directory storing application data and code not directly accessible by Web users. By default, the base path is assumed to be the protected directory under the directory containing the current running script.

- access: public
- throws: TConfigurationException if configuration file cannot be read or the runtime path is invalid.

TApplication __construct ([string $basePath = 'protected'], [boolean $cacheConfig = true])

- string $basePath: application base path or configuration file path. If the parameter is a file, it is assumed to be the application configuration file, and the directory containing the file is treated as the application base path. If it is a directory, it is assumed to be the application base path, and within that directory, a file named application.xml will be looked for. If found, the file is considered as the application configuration file.
- boolean $cacheConfig: whether to cache application configuration. Defaults to true.

clearGlobalState (line 412)

Clears a global value.

The value cleared will no longer be available in this request and the following requests.

- access: public

void clearGlobalState (string $key)

- string $key: the name of the value to be cleared

completeRequest (line 362)

Completes current request processing.

This method can be used to exit the application lifecycles after finishing the current cycle.

- access: public

void completeRequest ()
flushOutput (line 1022)

Flushes output to client side.

- access: public

void flushOutput ()
getApplicationStatePersister (line 706)

- return: application state persister
- access: public

IStatePersister getApplicationStatePersister ()
getAssetManager (line 685)

- return: asset manager
- access: public

TAssetManager getAssetManager ()
getAuthorizationRules (line 778)

- return: list of authorization rules for the current request
- access: public

TAuthorizationRuleCollection getAuthorizationRules ()
getBasePath (line 483)

- return: configuration path
- access: public

string getBasePath ()
getCache (line 727)

- return: the cache module, null if cache module is not installed
- access: public

ICache getCache ()
getConfigurationFile (line 491)

- return: configuration file path
- access: public

string getConfigurationFile ()
getErrorHandler (line 643)

- return: the error hanlder module
- access: public

TErrorHandler getErrorHandler ()
getGlobalization (line 760)

- return: globalization module
- access: public

TGlobalization getGlobalization ([boolean $createIfNotExists = true])

- boolean $createIfNotExists: whether to create globalization if it does not exist

getGlobalState (line 383)

Returns a global value.

A global value is one that is persistent across users sessions and requests.

- return: the global value corresponding to $key
- access: public

mixed getGlobalState (string $key, [mixed $defaultValue = null])

- string $key: the name of the value to be returned
- mixed $defaultValue: the default value. If $key is not found, $defaultValue will be returned

getID (line 443)

- return: application ID
- access: public

string getID ()
getMode (line 467)

- return: application mode (Off|Debug|Normal|Peformance), defaults to Debug.
- access: public

string getMode ()
getModule (line 530)

- return: the module with the specified ID, null if not found
- access: public

IModule getModule (mixed $id)
getModules (line 538)

- return: list of loaded application modules, indexed by module IDs
- access: public

array getModules ()
getPageService (line 557)

- return: page service
- access: public

TPageService getPageService ()
getParameters (line 549)

Returns the list of application parameters.

Since the parameters are returned as a TMap object, you may use the returned result to access, add or remove individual parameters.

- return: the list of application parameters
- access: public

TMap getParameters ()
getRequest (line 580)

- return: the request module
- access: public

THttpRequest getRequest ()
getRequestCompleted (line 370)

- return: whether the current request is processed.
- access: public

boolean getRequestCompleted ()
getResponse (line 601)

- return: the response module
- access: public

THttpResponse getResponse ()
getRuntimePath (line 500)

Gets the directory storing application-level persistent data.

- return: application state path
- access: public

string getRuntimePath ()
getSecurityManager (line 664)

- return: the security manager module
- access: public

TSecurityManager getSecurityManager ()
getService (line 508)

- return: the currently requested service
- access: public

IService getService ()
getSession (line 622)

- return: the session module, null if session module is not installed
- access: public

THttpSession getSession ()
getUniqueID (line 459)

- return: an ID that uniquely identifies this Prado application from the others
- access: public

string getUniqueID ()
getUser (line 743)

- return: the application user
- access: public

IUser getUser ()
initApplication (line 794)

Loads configuration and initializes application.

Configuration file will be read and parsed (if a valid cached version exists, it will be used instead). Then, modules are created and initialized; Afterwards, the requested service is created and initialized.

- access: protected
- throws: TConfigurationException if module is redefined of invalid type, or service not defined or of invalid type

void initApplication (string 0, string 1)

- string 0: configuration file path (absolute or relative to current executing script)
- string 1: cache file path, empty if no present or needed

loadGlobals (line 424)

Loads global values from persistent storage.

This method is invoked when OnLoadState event is raised. After this method, values that are stored in previous requests become available to the current request via getGlobalState.

- access: protected

void loadGlobals ()
onAuthentication (line 922)

Raises OnAuthentication event.

This method is invoked when the user request needs to be authenticated.

- access: public

void onAuthentication ()
onAuthenticationComplete (line 931)

Raises OnAuthenticationComplete event.

This method is invoked right after the user request is authenticated.

- access: public

void onAuthenticationComplete ()
onAuthorization (line 940)

Raises OnAuthorization event.

This method is invoked when the user request needs to be authorized.

- access: public

void onAuthorization ()
onAuthorizationComplete (line 949)

Raises OnAuthorizationComplete event.

This method is invoked right after the user request is authorized.

- access: public

void onAuthorizationComplete ()
onBeginRequest (line 913)

Raises OnBeginRequest event.

At the time when this method is invoked, application modules are loaded and initialized, user request is resolved and the corresponding service is loaded and initialized. The application is about to start processing the user request.

- access: public

void onBeginRequest ()
onEndRequest (line 1031)

Raises OnEndRequest event.

This method is invoked when the application completes the processing of the request.

- access: public

void onEndRequest ()
onError (line 899)

Raises OnError event.

This method is invoked when an exception is raised during the lifecycles of the application.

- access: public

void onError (mixed $param)

- mixed $param: event parameter

onLoadState (line 958)

Raises OnLoadState event.

This method is invoked when the application needs to load state (probably stored in session).

- access: public

void onLoadState ()
onLoadStateComplete (line 968)

Raises OnLoadStateComplete event.

This method is invoked right after the application state has been loaded.

- access: public

void onLoadStateComplete ()
onPreFlushOutput (line 1014)

Raises OnPreFlushOutput event.

This method is invoked right before the application flushes output to client.

- access: public

void onPreFlushOutput ()
onPreRunService (line 977)

Raises OnPreRunService event.

This method is invoked right before the service is to be run.

- access: public

void onPreRunService ()
onSaveState (line 995)

Raises OnSaveState event.

This method is invoked when the application needs to save state (probably stored in session).

- access: public

void onSaveState ()
onSaveStateComplete (line 1005)

Raises OnSaveStateComplete event.

This method is invoked right after the application state has been saved.

- access: public

void onSaveStateComplete ()
run (line 330)

Executes the lifecycles of the application.

This is the main entry function that leads to the running of the whole Prado application.

- access: public

void run ()
runService (line 985)

Runs the requested service.

- access: public

void runService ()
saveGlobals (line 433)

Saves global values into persistent storage.

This method is invoked when OnSaveState event is raised.

- access: protected

void saveGlobals ()
setApplicationStatePersister (line 719)

- access: public

void setApplicationStatePersister (IStatePersister $persister)

- IStatePersister $persister: application state persister

setAssetManager (line 698)

- access: public

void setAssetManager (TAssetManager $value)

- TAssetManager $value: asset manager

setCache (line 735)

- access: public

void setCache (ICache $cache)

- ICache $cache: the cache module

setErrorHandler (line 656)

- access: public

void setErrorHandler (TErrorHandler $handler)

- TErrorHandler $handler: the error hanlder module

setGlobalization (line 770)

- access: public

void setGlobalization (TGlobalization $glob)

- TGlobalization $glob: globalization module

setGlobalState (line 397)

Sets a global value.

A global value is one that is persistent across users sessions and requests. Make sure that the value is serializable and unserializable.

- access: public

void setGlobalState (string $key, mixed $value, [mixed $defaultValue = null])

- string $key: the name of the value to be set
- mixed $value: the global value to be set
- mixed $defaultValue: the default value. If $key is not found, $defaultValue will be returned

setID (line 451)

- access: public

void setID (string $value)

- string $value: application ID

setMode (line 475)

- access: public

void setMode (string $value)

- string $value: application mode. Valid values include Off, Debug, Normal, or Peformance

setModule (line 519)

Adds a module to application.

Note, this method does not do module initialization.

- access: public

void setModule (string $id, IModule $module)

- string $id: ID of the module
- IModule $module: module object

setPageService (line 572)

Registers the page service instance.

This method should only be used by framework developers.

- access: public

void setPageService (TPageService $service)

- TPageService $service: page service

setRequest (line 593)

- access: public

void setRequest (THttpRequest $request)

- THttpRequest $request: the request module

setResponse (line 614)

- access: public

void setResponse (THttpResponse $response)

- THttpRequest $response: the request module

setSecurityManager (line 677)

- access: public

void setSecurityManager (TSecurityManager $sm)

- TSecurityManager $sm: the security manager module

setSession (line 635)

- access: public

void setSession (THttpSession $session)

- THttpSession $session: the session module

setUser (line 751)

- access: public

void setUser (IUser $user)

- IUser $user: the application user

#### Inherited Methods

Inherited From TComponent

> TComponent::attachEventHandler()
> TComponent::canGetProperty()
> TComponent::canSetProperty()
> TComponent::detachEventHandler()
> TComponent::evaluateExpression()
> TComponent::evaluateStatements()
> TComponent::getEventHandlers()
> TComponent::getSubProperty()
> TComponent::hasEvent()
> TComponent::hasEventHandler()
> TComponent::hasProperty()
> TComponent::raiseEvent()
> TComponent::setSubProperty()
> TComponent::__get()
> TComponent::__set()

Class Constants
CONFIGCACHE_FILE = 'config.cache' (line 137)

Config cache file

CONFIG_FILE = 'application.xml' (line 129)

Application configuration file name

GLOBAL_FILE = 'global.cache' (line 141)

Global data file

PAGE_SERVICE_ID = 'page' (line 125)

Page service ID

RUNTIME_PATH = 'runtime' (line 133)

Runtime directory name

STATE_DEBUG = 'Debug' (line 118)
STATE_NORMAL = 'Normal' (line 119)
STATE_OFF = 'Off' (line 117)

application state

STATE_PERFORMANCE = 'Performance' (line 120)

Documentation generated on Mon, 01 May 2006 23:02:43 -0400 by phpDocumentor 1.3.0RC4