Db4o getting history of container?

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You can do by implementing event-handlers Basically you can register a event-handler for the creating and the updating event. Like this: IEventRegistry events = EventRegistryFactory. ForObjectContainer(container); events.

Creating +=delegate(object sender, CancellableObjectEventArgs args) { Console. WriteLine("{0} created: Value {1}",args.Object.GetType(),args. Object); } For viewing value changes you maybe need to peek the old state in the event-handler.

You can do this like this: IEventRegistry events = EventRegistryFactory. ForObjectContainer(container); events. Creating +=delegate(object sender, CancellableObjectEventArgs args) { IObjectContainer eventContainer = args.ObjectContainer(); object oldVersion = eventContainer.Ext().

Peek(args. Object,1,false); object currentVersion = args. Object; // Do comparison and print stuff } Of course the comparison and printing is the work you have to do.

There's nothing built in for that.

You can do by implementing event-handlers. Basically you can register a event-handler for the creating and the updating event. Like this: IEventRegistry events = EventRegistryFactory.

ForObjectContainer(container); events. Creating +=delegate(object sender, CancellableObjectEventArgs args) { Console. WriteLine("{0} created: Value {1}",args.Object.GetType(),args.

Object); }; For viewing value changes you maybe need to peek the old state in the event-handler. You can do this like this: IEventRegistry events = EventRegistryFactory. ForObjectContainer(container); events.

Creating +=delegate(object sender, CancellableObjectEventArgs args) { IObjectContainer eventContainer = args.ObjectContainer(); object oldVersion = eventContainer.Ext(). Peek(args. Object,1,false); object currentVersion = args.

Object; // Do comparison and print stuff }; Of course the comparison and printing is the work you have to do. There's nothing built in for that.

A nice read on the history of EJB, thanks Floyd! As to the question whether or not a standard for object persistence makes sense in the time of open source:Well of course it does! The majority of Java developers still uses plain JDBC to interface with databases.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.

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