Bug ID: JDK-8299687 Modify JLine library not to spawn native processes

Type: Enhancement
Component: core-libs
Sub-Component: java.io

Priority: P4
Status: Resolved
Resolution: Duplicate
OS: linux
CPU: generic

Submitted: 2023-01-05
Updated: 2023-10-10
Resolved: 2023-05-22

The `JLine` library used by `java.io.Console` spawns native processes by default on macOS/Linux platforms. (https://github.com/jline/jline3#jansi-vs-jna)
This imposes performance impact and should be replaced with JNI calls to the platform native libraries.

> This enhancement should involve the availability of tty, as reported in JDK-8302160. So how is that provided? I could not find any replacement for `System.console() != null` in https://github.com/openjdk/jdk/pull/13687.
10-10-2023
[~bdaloze] I can't tell if you have jumped on the wrong issue or not. Are you looking for Console::isTerminal method? This was added as part of JDK-8308591.
10-10-2023
I found it, it is available since 22 as java.io.Console#isTerminal(), thank you.
10-10-2023
Resolved by JDK-8306983
22-05-2023
This enhancement should involve the availability of tty, as reported in JDK-8302160.
09-02-2023

Duplicate :	JDK-8306983 - Do not invoke external programs when switch terminal to raw mode on selected platforms
Relates :	JDK-8299137 - Regression >4% on SpringBoot in b27 on x64 and aarch64
Relates :	JDK-8302160 - JDK 20+30 breaks external JLine usage with Error executing 'tty': not a tty (java.io.IOException)
Relates :	JDK-8299689 - Make use of JLine for Console as "opt-in"
Relates :	JDK-8295803 - Console should be usable in jshell and other environments