Class ConnectionManager
Manages and loads instances of Connection
Provides an interface to loading and creating connection objects. Acts as a registry for the connections defined in an application.
Provides an interface for loading and enumerating connections defined in config/app.php
- Cake\Datasource\ConnectionManager uses Cake\Core\StaticConfigTrait
Properties summary
-
$_aliasMapprotected staticarrayA map of connection aliases. -
$_dsnClassMapprotected staticarrayAn array mapping url schemes to fully qualified driver class names -
$_registryprotected staticThe ConnectionRegistry used by the manager.
Inherited Properties
Method Summary
-
alias() public static
Set one or more connection aliases. -
dropAlias() public static
Drop an alias. -
get() public static
Get a connection. -
parseDsn() public static
Parses a DSN into a valid connection configuration -
setConfig() public static
Configure a new connection object.
Method Detail
alias() public static ¶
alias( string $alias , string $source )
Set one or more connection aliases.
Connection aliases allow you to rename active connections without overwriting the aliased connection. This is most useful in the test-suite for replacing connections with their test variant.
Defined aliases will take precedence over normal connection names. For example, if you alias 'default' to 'test', fetching 'default' will always return the 'test' connection as long as the alias is defined.
You can remove aliases with ConnectionManager::dropAlias().
Usage
// Make 'things' resolve to 'test_things' connection ConnectionManager::alias('test_things', 'things');
Parameters
- string $alias
- The alias to add. Fetching $source will return $alias when loaded with get.
- string $source
- The connection to add an alias to.
Throws
Cake\Datasource\Exception\MissingDatasourceConfigExceptionWhen aliasing a connection that does not exist.
dropAlias() public static ¶
dropAlias( string $name )
Drop an alias.
Removes an alias from ConnectionManager. Fetching the aliased connection may fail if there is no other connection with that name.
Parameters
- string $name
- The connection name to remove aliases for.
get() public static ¶
get( string $name , boolean $useAliases true )
Get a connection.
If the connection has not been constructed an instance will be added
to the registry. This method will use any aliases that have been
defined. If you want the original unaliased connections pass false
as second parameter.
Parameters
- string $name
- The connection name.
- boolean $useAliases optional true
- Set to false to not use aliased connections.
Returns
Throws
parseDsn() public static ¶
parseDsn( string|null $config null )
Parses a DSN into a valid connection configuration
This method allows setting a DSN using formatting similar to that used by PEAR::DB. The following is an example of its usage:
$dsn = 'mysql://user:pass@localhost/database'; $config = ConnectionManager::parseDsn($dsn); $dsn = 'Cake\Database\Driver\Mysql://localhost:3306/database?className=Cake\Database\Connection'; $config = ConnectionManager::parseDsn($dsn); $dsn = 'Cake\Database\Connection://localhost:3306/database?driver=Cake\Database\Driver\Mysql'; $config = ConnectionManager::parseDsn($dsn);
For all classes, the value of scheme is set as the value of both the className and driver
unless they have been otherwise specified.
Note that query-string arguments are also parsed and set as values in the returned configuration.
Parameters
- string|null $config optional null
- The DSN string to convert to a configuration array
Returns
The configuration array to be stored after parsing the DSN
setConfig() public static ¶
setConfig( string|array $key , array|null $config null )
Configure a new connection object.
The connection will not be constructed until it is first used.
Parameters
- string|array $key
- The name of the connection config, or an array of multiple configs.
- array|null $config optional null
- An array of name => config data for adapter.
Throws
See
Methods used from Cake\Core\StaticConfigTrait
config() public static ¶
config( string|array $key , array|null $config null )
This method can be used to define configuration adapters for an application or read existing configuration.
To change an adapter's configuration at runtime, first drop the adapter and then reconfigure it.
Adapters will not be constructed until the first operation is done.
Usage
Assuming that the class' name is Cache the following scenarios
are supported:
Reading config data back:
Cache::config('default');
Setting a cache engine up.
Cache::config('default', $settings);
Injecting a constructed adapter in:
Cache::config('default', $instance);
Configure multiple adapters at once:
Cache::config($arrayOfConfig);
Deprecated
Parameters
- string|array $key
- The name of the configuration, or an array of multiple configs.
- array|null $config optional null
- An array of name => configuration data for adapter.
Returns
Null when adding configuration or an array of configuration data when reading.
Throws
When trying to modify an existing config.
configured() public static ¶
configured( )
Returns an array containing the named configurations
Returns
Array of configurations.
drop() public static ¶
drop( string $config )
Drops a constructed adapter.
If you wish to modify an existing configuration, you should drop it, change configuration and then re-add it.
If the implementing objects supports a $_registry object the named configuration
will also be unloaded from the registry.
Parameters
- string $config
- An existing configuration you wish to remove.
Returns
Success of the removal, returns false when the config does not exist.
dsnClassMap() public static ¶
dsnClassMap( array $map null )
Returns or updates the DSN class map for this class.
Deprecated
Parameters
- array $map optional null
- Additions/edits to the class map to apply.
Returns
getConfig() public static ¶
getConfig( string $key )
Reads existing configuration.
Parameters
- string $key
- The name of the configuration.
Returns
Array of configuration data.
getDsnClassMap() public static ¶
getDsnClassMap( )
Returns the DSN class map for this class.
Returns
setDsnClassMap() public static ¶
setDsnClassMap( array $map )
Updates the DSN class map for this class.
Parameters
- array $map
- Additions/edits to the class map to apply.
Properties detail
$_dsnClassMap ¶
An array mapping url schemes to fully qualified driver class names
Return
[
'mysql' => 'Cake\Database\Driver\Mysql',
'postgres' => 'Cake\Database\Driver\Postgres',
'sqlite' => 'Cake\Database\Driver\Sqlite',
'sqlserver' => 'Cake\Database\Driver\Sqlserver',
]