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Jacek Laskowski

Spring4D and objects life cycle

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I have a class that does not have an interface, I register it and its factory in this way:


TServiceLog = class;
TServiceLogFactory = reference to function() : TServiceLog;

Container.RegisterType<TServiceLog, TServiceLog>.PerResolve;

pay attention to the use of PerRersolve, maybe it matters.


Then I use this class in many other classes, as a parameter in the constructor, all object creation is done by Spring container:

  TFrameworkSMTPBus = class(TSMTPBus, IFrameworkBase, ISMTPBus)
    fServiceLog: TServiceLog;
    constructor Create(const aServiceLog: TServiceLog; const aSMTPClientFactory: TSMTPClientFactory); reintroduce; virtual;


Are TServiceLog instances automatically released by Spring or should I release manually? It looks like it is released by Spring, but I have one case of memory leak, where after adding fServiceLog.Free leaked disappeared. And that's why I ask how it works underneath.

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I'm asking about Spring principles/rules. Because many instances of one of the classes are released by Spring and one of them is not released. I could not get to the cause.

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