alzimmermsft

Short version

• Any type which may have managed resources must implement Closeable and close any resources it manages.
  • For example, a service client might implement Closeable if it creates managed resources such as an ExecutorService. But, it shouldn't close Closeables passed to it such as an HttpClient.
• HttpClient instances, since they are shared, must register with Cleaner and register a shutdown hook.
  • This will enable HttpClient to close if garbage collected or if the JVM is shutting down.
• Response instance must register with Cleaner so they do not leak connections if they aren't consumed before garbage collection.
• Allow for ExecutorService to be configured where asynchronous or parallelized execution is needed.
• If not set, default to SharedExecutorService as this is a central configuration point for users.