DEV Community: Filipe Mesquita

How to get a thread dump of running Java process

Filipe Mesquita — Tue, 08 Oct 2024 20:53:05 +0000

jstack <pid> > threadDump.txt

How use a Magic keyboard on top of a Macbook

Filipe Mesquita — Mon, 20 Mar 2023 18:05:17 +0000

Install Karabiner and disable built-in keyboard when a bluetooth keyboard is connected.

https://apple.stackexchange.com/questions/67133/how-to-disable-the-built-in-macbook-keyboard

Prevent Touch ID button to trigger:
1) screen lock: defaults write com.apple.loginwindow DisableScreenLockImmediate -bool yes
2) Accessibility shortcut (triple press): Apple menu  > System Settings (or System Preferences), click Accessibility, then click Shortcut. Then just uncheck every shortcut option and the menu no longer comes up.

How to trigger a LiveReload on a remote machine

Filipe Mesquita — Thu, 23 Feb 2023 19:54:30 +0000

Use this extension in Chrome (RemoteLiveReload, not LiveReload):
https://chrome.google.com/webstore/detail/remotelivereload/jlppknnillhjgiengoigajegdpieppei/related?hl=en-GB

Make sure the LiveReload server is running on port 35729 and that this port is accessible from your local machine (e.g., using telnet).

How to Manage multiple Java versions on macOS

Filipe Mesquita — Thu, 23 Feb 2023 19:53:16 +0000

Use jenv

Use homebrew to add a java version.

Use the command: jenv add to add this version to jenv

jenv versions to see all versions added

More info: https://www.jenv.be/

How to debug a SpringBoot application in IntelliJ IDEA

Filipe Mesquita — Thu, 12 Jan 2023 19:03:30 +0000

open Gradle module, expand Tasks
right-click on bootRun
click on Debug

How to change the default app for files of a particular type in the mac terminal

Filipe Mesquita — Sun, 08 Jan 2023 02:49:51 +0000

https://superuser.com/questions/273756/how-to-change-default-app-for-all-files-of-particular-file-type-through-terminal

Install duti: brew install duti

Now you need to find the id of the app you want to use, and assign it to the extension you want to use it for. In this example, I already use Brackets for *.sh and I want to also use it for *.md files instead of xcode.

Get the default app id for .sh files: duti -x sh

output:
  Brackets.app
  /opt/homebrew-cask/Caskroom/brackets/1.6/Brackets.app
  io.brackets.appshell

The last line is the id.

Use this app id for all .md files: duti -s io.brackets.appshell .md all

How to quickly speed up Java serialization

Filipe Mesquita — Fri, 06 Jan 2023 17:40:14 +0000

Use Kryo Serialization with setRegistrationRequired(false): https://github.com/EsotericSoftware/kryo

Use KryoPool for multi-threaded serialization and toBytes() (not getBuffer()) to get the serialization output.

How to monitor a Java remote app with VisualVM

Filipe Mesquita — Fri, 06 Jan 2023 17:37:09 +0000

Add the following JVM arguments to the remote app:
-Djava.rmi.server.hostname=[enter_hostname_here] -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=[enter_port_here] -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.local.only=false

Open VisualVM locally and setup a new JMX connection with SSL disabled.

Note: make sure the server is not open to the public internet!