finalizer

Quote from MSDN: If Finalize or an override of Finalize throws an exception, the runtime ignores the exception, terminates that Finalize method, and continues the finalization process. Yet if I have: ~Person() { throw new Exception("meh"); } then it results in a runtime exception? p.s. I know that this should never happen, however I'm just curious around this behaviour. One of our clients had an empty try catch around all of their finalizers.. it didn't even log when things went wrong or reserect the object :/ Linking the source of your quote is important. I have to assume it talks about an

I learned that calling an Object's wait() method will release the object monitor, if present. But I have some questions regarding calling notify() on this object by another thread: (when) will the waiting thread wake up, if another (a 3rd) thread owns the object monitor in the meanwhile? will the waiting thread wake up, if a 3rd thread called wait() on this object? is it possible to determine if a thread is waiting for notifying a particular object (java 1.4/java 5) What's happening if wait() will be called in the finalize() method? notify will wake one thread waiting on the monitor. Unless

Object.finalize() is deprecated in Java 9, and I think I understand the reasons why, but I'm having trouble seeing how to replace it. I have a utility class called Configuration which essentially has a single instance that owns everything in the application and lasts for the duration of the application. One of the services it provides is logging: on first request to log a message, a logger is created (for various legacy reasons it's my own Logger rather than a standard one), with a reference held in a field of the Configuration object, and on application termination, whether normal or abnormal

what will the Finalizer thread do if there is a infinite loop or deadlock in the Java finalize method . The spec writes: Before the storage for an object is reclaimed by the garbage collector, the Java Virtual Machine will invoke the finalizer of that object. The Java programming language does not specify how soon a finalizer will be invoked, except to say that it will happen before the storage for the object is reused. I read this to mean that the finalizer must have completed before the storage may be reused. The Java programming language does not specify which thread will invoke the

I've got a class named BackgroundWorker that has a thread constantly running. To turn this thread off, an instance variable named stop to needs to be true . To make sure the thread is freed when the class is done being used, I've added IDisposable and a finalizer that invokes Dispose() . Assuming that stop = true does indeed cause this thread to exit, is this sippet correct? It's fine to invoke Dispose from a finalizer, right? Finalizers should always call Dispose if the object inherits IDisposable , right? /// <summary> /// Force the background thread to exit. /// </summary> public void

When I read a few articles about memory management in C#, I was confused by Finalizer methods. There are so many complicated rules which related with them. For instance, nobody knows when the finalizers will be called, they called even if code in ctor throws, CLR doesn't guarantee that all finalizers be called when programs shutdowt, etc. For what finalizers can be used in real life? The only one example which I found was program which beeps when GC starts. Do you use Finalizers in your code and may have some good samples ? UPD: Finalizers can be used when developpers want to make sure that

I have a misbehaving application that seems to leak. After a brief profiler investigation, most memory (80%) is held by java.lang.ref.Finalizer instances. I suspect that finalizers fail to run. A common cause of this seems to be exceptions thrown from the finalizer. However, the javadoc for the finalize method of the Object class (see here for instance) seems to contradict itself: it states If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates. but later, it also states that Any exception thrown by the finalize method

How does a "finalizer guardian" [Effective Java , page 30] work ? Have you used them? Did it solve any specific problem ? It solves the problem of the sub-class forgetting to call the finalize method of the super-class. This pattern works by attaching an extra instance with overridden finalize to your super-class. This way, if the super-class goes out of scope, the attached instance would also go out of scope, which would trigger the execution of its finalize , which would in turn call the finalize of the enclosing class. Here is a short snippet that showcases the guardian pattern in action: