Class OpenSSLDigestContext
public class OpenSSLDigestContext extends Object
-
Constructor Summary
Constructors Constructor Description OpenSSLDigestContext(long ctx) -
Method Summary
Modifier and Type Method Description protected voidfinalize()Invoked when the garbage collector has detected that this instance is no longer reachable.
-
Constructor Details
-
OpenSSLDigestContext
public OpenSSLDigestContext(long ctx)
-
-
Method Details
-
finalize
Description copied from class:ObjectInvoked when the garbage collector has detected that this instance is no longer reachable. The default implementation does nothing, but this method can be overridden to free resources.Note that objects that override
finalizeare significantly more expensive than objects that don't. Finalizers may be run a long time after the object is no longer reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup. Note also that finalizers are run on a single VM-wide finalizer thread, so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary for a class that has a native peer and needs to call a native method to destroy that peer. Even then, it's better to provide an explicitclosemethod (and implementCloseable), and insist that callers manually dispose of instances. This works well for something like files, but less well for something like aBigIntegerwhere typical calling code would have to deal with lots of temporaries. Unfortunately, code that creates lots of temporaries is the worst kind of code from the point of view of the single finalizer thread.If you must use finalizers, consider at least providing your own
ReferenceQueueand having your own thread process that queue.Unlike constructors, finalizers are not automatically chained. You are responsible for calling
super.finalize()yourself.Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.
-