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c#entity-framework-4inversion-of-controlautofac
Juri
Juri

Reputation: 32900

AutoFac LifeTime: Force new instance in specific situation

I have the following configuration:

builder.Register<EntityContext>().As(
   c=> {
       var entityCtx = new EntityContext();
       //snip snip: some config stuff

       return entityCtx;
   }).As<MyDbContext>().InstancePerLifetimeScope();

EntityContext obviously inherits from MyDbContext which again inherits from DbContext.

In my repository's constructor I'm usually using them as

...
public MyRepository(MyDbContext context) {...}

This ensures to have one ctx per http request which is what I want. But now I have the need that for a specific repository I want to have a different instance of the EntityContext than is normally being used.

How would you achieve that? The following came to my mind:

Any other ideas?

Upvotes: 3

Views: 2538

Answers (2)

Juri
Juri

Reputation: 32900

I just found a proper solution that could work, namely to use the OwnedInstances of AutoFac if I understood correctly. For example:

class MyRepository
{
    public MyRepository(Owned<MyDbContext> context, MyDbContext context2)
    {
        //context and context2 are two different object instances
    }
}

This scenario is especially useful if you'd like MyRepository to run in a different transaction, i.e. it needs to have a different DbContext instance than the other repositories.

Upvotes: 5

Ladislav Mrnka
Ladislav Mrnka

Reputation: 364259

Once you have different lifetime requirement you must either use another config or manually call container to give you a new instance of the context (or create context instance directly but that is something you don't want to do when using IoC container).

Upvotes: 2

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