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Update tutorial to reflect new interface registration behaviour

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Mike Bierlee 2015-09-26 22:40:34 +02:00
parent 19af879b5f
commit 7fba33247a
1 changed files with 9 additions and 10 deletions
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19
TUTORIAL.md
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@ -27,20 +27,19 @@ To manually resolve a dependency, all you have to do is resolve the dependency's
```d ```d
auto exampleClassInstance = dependencies.resolve!ExampleClass; auto exampleClassInstance = dependencies.resolve!ExampleClass;
``` ```
If the class is registered by interface and not by concrete type, you cannot resolve the class by concrete type. Registration of both a concrete type and interface type will resolve different registrations, returning different instances: If the class is registered by interface and not by concrete type, you can still resolve the class by concrete type:
```d ```d
auto exampleClassInstance = dependencies.resolve!ExampleClass; auto exampleClassInstance = dependencies.resolve!ExampleInterface;
auto exampleClassInstance2 = dependencies.resolve!ExampleInterface; auto exampleClassInstance2 = dependencies.resolve!ExampleClass;
assert(exampleClassInstance !is exampleClassInstance2);
```
You can solve this by adding the ADD_CONCRETE_TYPE_REGISTRATION option when registering:
```d
dependencies.register!(ExampleInterface, ExampleClass)(RegistrationOptions.ADD_CONCRETE_TYPE_REGISTRATION);
auto exampleClassInstance = dependencies.resolve!ExampleClass;
auto exampleClassInstance2 = dependencies.resolve!ExampleInterface;
assert(exampleClassInstance is exampleClassInstance2); assert(exampleClassInstance is exampleClassInstance2);
``` ```
If you want to prevent registrations from being both registered by interface and concrete type, use the DO_NOT_ADD_CONCRETE_TYPE_REGISTRATION option when registering:
```d
dependencies.register!(ExampleInterface, ExampleClass)(RegistrationOptions.DO_NOT_ADD_CONCRETE_TYPE_REGISTRATION);
auto exampleClassInstance = dependencies.resolve!ExampleInterface;
auto exampleClassInstance2 = dependencies.resolve!ExampleClass; // A ResolveException is thrown
```
Dependency scopes Dependency scopes
----------------- -----------------