private void btnGO_Click(object sender, EventArgs e)
{
IUnityContainer container = new UnityContainer();
container.RegisterType <Service1>(new ContainerControlledLifetimeManager());
container.RegisterType <Service2>(new ContainerControlledLifetimeManager());
container.RegisterType <Service3>(new ContainerControlledLifetimeManager());
IUnityContainer childCtr = container.CreateChildContainer();
childCtr.RegisterType <Service3>(new ContainerControlledLifetimeManager());
var service1 = container.Resolve <Service1>();
service1.CallMe();
var service2 = container.Resolve <Service2>();
service2.CallMe();
//resolving svc1 will not create new instance of svc3 even it was registered in the childCtr
var svc1 = childCtr.Resolve <Service1>();
svc1.CallMe();
//but when we resolve directly svc3 then new instance is used!
var svc3 = childCtr.Resolve <Service3>();
svc1.CallMe();
childCtr.Dispose();
}
private void btnGoHierarchical_Click(object sender, EventArgs e)
{
IUnityContainer container = new UnityContainer();
container.RegisterType <Service1>(new HierarchicalLifetimeManager());
container.RegisterType <Service2>(new HierarchicalLifetimeManager());
container.RegisterType <Service3>(new HierarchicalLifetimeManager());
//this aproach is used in WebApi3 - child container is created for every request
IUnityContainer childCtr = container.CreateChildContainer();
var service1 = container.Resolve <Service1>();
service1.CallMe();
var service2 = container.Resolve <Service2>();
service2.CallMe();
//new instance is created
var svc1 = childCtr.Resolve <Service1>();
svc1.CallMe();
//new instance is not created because it was resolved already during resolving Service1 in the child container!
var svc3 = childCtr.Resolve <Service3>();
svc1.CallMe();
childCtr.Dispose();
}
private UnityContainer()
{
IUnityContainer container =
globalUnityContainer.CreateChildContainer();
ExeConfigurationFileMap fileMap =
new ExeConfigurationFileMap
{
ExeConfigFilename = UnityConfigFileName
};
Configuration configuration =
ConfigurationManager.OpenMappedExeConfiguration(
fileMap,
ConfigurationUserLevel.None);
UnityConfigurationSection unitySection =
(UnityConfigurationSection)configuration.GetSection("unity");
container.LoadConfiguration(unitySection);
this.internalUnityContainer = container;
}