Hi, Yes, factory lifecycle and instance lifecycle are different. This is because they react to different events.
Factories are valid when they can create the instance (container), meaning that all the ‘handler factories’ are there. Instances are valid when all handlers composing its container are valid. This generally means all the required services are available, but it’s not limited to this. So, when you create an instance from a factory, the instance is started, but may not be in a valid state. It will switch to the valid state only if the previous condition is met. You can retrieve the state of the instance from the Instance object, as well a register a listener. BTW, this let you create instances that will be bound together without having to handle the creation order. A factory can’t know in advance if the instance is going to be valid. This is because it depends on numerous factor. For example, the instance configuration can customize service dependencies filters, or the code can use a @Controller field to decide its state, or a provider may disappear during the creation… However, factory states impact instance states in a drastic way…. If the factory becomes invalid - all instances, created from this factory, are destroyed whatever their state. This is because iPOJO cannot guaranty the integrity of their container anymore. Cheers, Clement On 11 décembre 2014 at 22:43:48, [email protected] ([email protected]) wrote: Hello, I realised today I made a wrong assumption with iPojo. I thought that if I used a factory to create an instance, that I could be 100% sure that the instance was going to be valid because (I thought) that if the instance was missing dependencies, the factory itself would be invalid. That is not the case, however. So I am wondering, why is this the case? Now i will have to check after any instance creation if the instance is valid but I'm not sure why. What is the use case where you would want a factory to allow you to create invalid instances? why isn't the state of the factory tied to the state of the instances it creates so that if a factory is not capable of creating valid instances, it itself is invalid? Thank you for any insights Alejandro Endo | Software Designer/Concepteur de logiciels Grass Valley, A Belden Brand | Tel: (514) 333-1772 Ext: 3789 3499 Douglas-B.-Floreani, St-Laurent, Quebec Canada H4S 2C6 DISCLAIMER: Privileged and/or Confidential information may be contained in this message. If you are not the addressee of this message, you may not copy, use or deliver this message to anyone. In such event, you should destroy the message and kindly notify the sender by reply e-mail. It is understood that opinions or conclusions that do not relate to the official business of the company are neither given nor endorsed by the company. Thank You.
