I have a Service
that makes requests via a RestClient
.
What is the Java best practice between:
ShutdownHook
What is the Java best practice between
There are no "best practices". Please read and contemplate No Best Practices
- Opening and closing the connection every time I make a request
That's inefficient, especially if you are talking to an HTTPS endpoint.
Also, if you accidentally fail to close the connection, there is a potential that you will leak resources. It depends on how you open the connection.
- Opening the connection at class initialization and closing it in a ShutdownHook.
OK but, don't need to close it in a shutdown hook. All of your application's outstanding network connections will be closed by the operating system when your application exits. Closing them explicitly is unnecessary.
- Something I didn't think of ...
a. Open the connection once at the start (in class initialization, via a singleton, whatever) ... and don't bother to close it. (See above.)
b. Use an HTTP client or REST client library that can manage a connection pool. Especially if your application is multi-threaded, or if it talks to multiple HTTP or HTTPS endpoints.