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In-Reply-To: <1084afab-e3d7-4fcb-9e09-63c159bc9e10@app.fastmail.com>
Date: Fri, 7 Mar 2025 20:40:22 +0200
Message-ID: <CAMW7n8CXq7dUJ+DLwXA2MW4xnz_u1uGNMmanDzi1nP+A9n2V-g@mail.gmail.com>
Subject: Re: Fwd: [PHP-DEV] PHP True Async RFC
To: Rob Landers <rob@bottled.codes>
Cc: internals@lists.php.net
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From: edmond.ht@gmail.com (Edmond Dantes)

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>
> This sounds like you are not using DI meant for fibers/multiple requests
at the same time.
>

Spiral already supports DI containers based on *Scope *(like "per request"
injections). Symfony, if I=E2=80=99m not mistaken, does too.

Spiral introduces a restriction to ensure correct handling of Scope
dependencies: they cannot be mixed with regular dependencies. If a Scope
dependency is needed inside a regular dependency, then (using the same
approach that Larry already showed), it should be done through an
additional interface:

```php
final class UserScope
{
    public function __construct(
        private readonly ContainerInterface $container
    ) {
    }

    public function getUserContext(): ?UserContext
    {
        // error checking is omitted
        return $this->container->get(UserContext::class);
    }

    public function getName(): string
    {
        return $this->getUserContext()->getName();
    }
}
```

At the beginning of a request, Spiral initializes a memory area with Scope
dependencies, so it can be said that it is already prepared to work with
coroutines with minimal modifications.

---

Ed.

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<div dir=3D"ltr"><p>&gt;<br>&gt;=C2=A0<font color=3D"#333333" face=3D"Fira =
Mono, monospace"><span style=3D"font-size:14px;background-color:rgb(242,242=
,242)">This sounds like you are not using DI meant for fibers/multiple requ=
ests at the same time.<br></span></font>&gt;</p><p>Spiral already supports =
DI containers based on <b>Scope </b>(like &quot;per request&quot; injection=
s). Symfony, if I=E2=80=99m not mistaken, does too.</p>
<p>Spiral introduces a restriction to ensure correct handling of Scope depe=
ndencies: they cannot be mixed with regular dependencies. If a Scope depend=
ency is needed inside a regular dependency, then (using the same approach t=
hat Larry already showed), it should be done through an additional interfac=
e:</p><p>```php<br>final class UserScope<br>{<br>=C2=A0 =C2=A0 public funct=
ion __construct(<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 private readonly ContainerI=
nterface $container<br>=C2=A0 =C2=A0 ) {<br>=C2=A0 =C2=A0 }<br><br>=C2=A0 =
=C2=A0 public function getUserContext(): ?UserContext<br>=C2=A0 =C2=A0 {<br=
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 // error checking is omitted<br>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 return $this-&gt;container-&gt;get(UserContext::class);<br>=
=C2=A0 =C2=A0 }<br><br>=C2=A0 =C2=A0 public function getName(): string<br>=
=C2=A0 =C2=A0 {<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 return $this-&gt;getUserCont=
ext()-&gt;getName();<br>=C2=A0 =C2=A0 }<br>}<br>```<br><br>At the beginning=
 of a request, Spiral initializes a memory area with Scope dependencies, so=
 it can be said that it is already prepared to work with coroutines with mi=
nimal modifications.=C2=A0=C2=A0</p><p>---</p><p>Ed.</p></div>

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