Deep checks on whether a service references another service need to
exclude the 'service_container' service as it doesn't exist. Without this
dumping the container will fail if a service definition references an
inlined service which has a direct or indirect dependency to the
service_container.
Reduce couple count calls in [Yaml]
Modernize type casting, fix several strict comparisons
Unsets merged
Elvis operator usage
Short syntax for applied operations
This PR was merged into the 2.3 branch.
Discussion
----------
[DependencyInjection] make paths relative to __DIR__ in the generated container
| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | #6484, #3079, partially #9238, #10894, #10999
| License | MIT
| Doc PR | n/a
This is an alternative approach to #10999 for removing absolute paths from the generated container:
instead of trying to fix the container file after it has been dumped, telling to the PhpDumper where its output will be written allows it to replace parts of strings by an equivalent value based on `__DIR__`.
This should be safe, thus the PR is on 2.3.
Commits
-------
edd7057 [DependencyInjection] make paths relative to __DIR__ in the generated container
* 2.2:
No Entity Manager defined exception
fixed CS
[Acl] Fix for issue #9433
[Validator] fix docblock typos
[DependencyInjection] removed the unused Reference and Parameter classes use statements from the compiled container class
Fix mistake in translation's service definition.
if handler_id is identical to null fix
CS fix
Fixed ModelChoiceList tests in Propel1 bridge.
[AclProvider] Fix incorrect behaviour when partial results returned from cache
Check if the pipe array is empty before calling stream_select()
re-factor Propel1 ModelChoiceList
[Locale] fixed the failing test described in #9455
[Process] fix phpdoc and timeout of 0
bug #9445 [BrowserKit] fixed protocol-relative url redirection
Conflicts:
src/Symfony/Component/BrowserKit/Tests/ClientTest.php
src/Symfony/Component/Locale/Tests/Stub/StubIntlDateFormatterTest.php
* 2.2:
[HttpKernel] added a check for private event listeners/subscribers
[FrameworkBundle] fixed registration of the register listener pass
[Form] Fixed regression causing invalid "WHERE id IN ()" statements
[DependencyInjection] fixed a non-detected circular reference in PhpDumper (closes#8425)
[Form] Fixed regression in BooleanToStringTransformer from ed83752
[FrameworkBundle] removed obsolete code
[Process] Close unix pipes before calling `proc_close` to avoid a deadlock
Conflicts:
src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
src/Symfony/Component/HttpKernel/DependencyInjection/RegisterListenersPass.php
src/Symfony/Component/Process/Process.php
This circular reference cannot be detected by the compiler pass as we
don't check for method arguments there.
The Container itself already detects such circular references at runtime.
So this fix is about circular references that are not detected at
compile time, and are not even detected at runtime because the code that
would cause the detection is never run (generated after a return
statement.)
This PR was squashed before being merged into the master branch (closes#7890).
Discussion
----------
ProxyManager Bridge
As of @beberlei's suggestion, I re-implemented #7527 as a new bridge to avoid possible hidden dependencies.
Everything is like #7527 except that the new namespace (and possibly package/subtree split) `Symfony\Bridge\ProxyManager` is introduced
| Q | A
| ------------- | ---
| Bug fix? | no
| New feature? | yes
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | #6140 (supersedes) #5012#6102 (maybe) #7527 (supersedes)
| License | MIT (attached code) - BSD-3-Clause (transitive dependency)
| Doc PR | Please pester me to death so I do it
This PR introduces lazy services along the lines of zendframework/zf2#4146
It introduces an **OPTIONAL** dependency to [ProxyManager](https://github.com/Ocramius/ProxyManager) and transitively to [`"zendframework/zend-code": "2.*"`](https://github.com/zendframework/zf2/tree/master/library/Zend/Code).
## Lazy services: why? A comprehensive example
For those who don't know what this is about, here's an example.
Assuming you have a service class like following:
```php
class MySuperSlowClass
{
public function __construct()
{
// inject large object graph or do heavy computation
sleep(10);
}
public function doFoo()
{
echo 'Foo!';
}
}
```
The DIC will hang for 10 seconds when calling:
```php
$container->get('my_super_slow_class');
```
With this PR, this can be avoided, and the following call will return a proxy immediately.
```php
$container->getDefinitions('my_super_slow_class')->setLazy(true);
$service = $container->get('my_super_slow_class');
```
The 10 seconds wait time will be delayed until the object is actually used:
```php
$service->doFoo(); // wait 10 seconds, then 'Foo!'
```
A more extensive description of the functionality can be found [here](https://github.com/Ocramius/ProxyManager/blob/master/docs/lazy-loading-value-holder.md).
## When do we need it?
Lazy services can be used to optimize the dependency graph in cases like:
* Webservice endpoints
* Db connections
* Objects that cause I/O in general
* Large dependency graphs that are not always used
This could also help in reducing excessive service location usage as I've explained [here](http://ocramius.github.com/blog/zf2-and-symfony-service-proxies-with-doctrine-proxies/).
## Implementation quirks of this PR
There's a couple of quirks in the implementation:
* `Symfony\Component\DependencyInjection\CompilerBuilder#createService` is now public because of the limitations of PHP 5.3
* `Symfony\Component\DependencyInjection\Dumper\PhpDumper` now with extra mess!
* The proxies are dumped at the end of compiled containers, therefore the container class is not PSR compliant anymore
Commits
-------
78e3710 ProxyManager Bridge
A service can now be marked as synchronized; when set, all method calls
involving this service will be called each time this service is set.
When in a scope, methods are also called to restore the previous version of the
service.
