c# - How to achieve object scoped singletons in the Unity Container? -

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assume have following class structure:

public class outer {     [dependency]     public func<inner> innerfactory { get; set; } }  public class inner { }

in autofac can done in following way (and describes behaviour looking for; ignore fact stupid contrived example):

[testmethod] public void autofacmakesthiseasy() {     var builder = new containerbuilder();      builder.registertype<outer>().propertiesautowired();     builder.registertype<inner>().instanceperowned<outer>();      var container = builder.build();      var outer1 = container.resolve<owned<outer>>().value;      var inner1 = outer1.innerfactory();     var inner2 = outer1.innerfactory();      var outer2 = container.resolve<owned<outer>>().value;      var inner3 = outer2.innerfactory();     var inner4 = outer2.innerfactory();      assert.arenotsame(outer1, outer2, "outer1 == outer2");     assert.aresame(inner1, inner2, "inner1 != inner2");     assert.arenotsame(inner2, inner3, "inner2 == inner3");     assert.aresame(inner3, inner4, "inner3 != inner4"); }

how can achieve same behaviour in unity following test passes?

[testmethod] public void unityhasmescratchingmyhead() {     var container = new unitycontainer();      //// shoud here?      var outer1 = container.resolve<outer>();      var inner1 = outer1.innerfactory();     var inner2 = outer1.innerfactory();      var outer2 = container.resolve<outer>();      var inner3 = outer2.innerfactory();     var inner4 = outer2.innerfactory();      assert.arenotsame(outer1, outer2, "outer1 == outer2");     assert.aresame(inner1, inner2, "inner1 != inner2");     assert.arenotsame(inner2, inner3, "inner2 == inner3");     assert.aresame(inner3, inner4, "inner3 != inner4"); }

note: dearly love ditch unity decent ioc, going hard sell.

if innerfactory inner instead of func<inner> solution perresolvelifetimemanager

[testmethod] public void unityhasmescratchingmyhead() {     var container = new unitycontainer();      container.registertype<inner>(new perresolvelifetimemanager());      var outer1 = container.resolve<outer>();     //... , on.

however because have factory need make little more complicated. need make factory perresolve have objects factory makes same instance (containercontrolledlifetimemanager). via following:

[testmethod] public void unityhasmescratchingmyhead() {     var container = new unitycontainer();      container.registertype<func<inner>>(new perresolvelifetimemanager(), new injectionfactory(x =>     {         var child = x.createchildcontainer();         child.registertype<inner>(new containercontrolledlifetimemanager());         return new func<inner>(() => child.resolve<inner>());     }));      var outer1 = container.resolve<outer>();      var inner1 = outer1.innerfactory();     var inner2 = outer1.innerfactory();      var outer2 = container.resolve<outer>();      var inner3 = outer2.innerfactory();     var inner4 = outer2.innerfactory();      assert.arenotsame(outer1, outer2, "outer1 == outer2");     assert.aresame(inner1, inner2, "inner1 != inner2");     assert.arenotsame(inner2, inner3, "inner2 == inner3");     assert.aresame(inner3, inner4, "inner3 != inner4"); }

one thing of note, unity extensible. if going doing little work make instanceperownedlifetimemanager<t> , use , not need worry generating factories @ all.


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