docs(notes): add 2025-03-21-idea-liberty-en.md

Author: lzwjava

notes/2025-03-21-idea-liberty-en.md

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+title: IntelliJ IDEA and WebSphere Liberty Debugging
+lang: en
+layout: post
+audio: false
+translated: false
+generated: true
+---
+
+Yes, IntelliJ IDEA can debug applications running on WebSphere Liberty Server. Here’s how and what options are available:
+
+### Liberty Tools Plugin for IntelliJ IDEA
+Similar to the Liberty Tools plugin available for Eclipse, IntelliJ IDEA also has its own **Liberty Tools plugin**, developed by the Open Liberty project (which WebSphere Liberty is based on). This plugin provides integrated support for WebSphere Liberty Server, including:
+
+- **Starting the server in development mode** (Liberty dev mode), which supports automatic redeployment of code changes and integrated debugging.
+- **Debugging capabilities**, allowing you to set breakpoints, step through code, and inspect variables directly within IntelliJ IDEA.
+
+This plugin offers a seamless debugging experience comparable to what Eclipse provides with its Liberty Tools plugin. You can install it from the IntelliJ IDEA plugin marketplace.
+
+### Alternative Choice: Remote Debugging
+If you prefer not to use the plugin or need a more manual approach, you can debug your application using **remote debugging**. Here’s how:
+
+1. **Start WebSphere Liberty in debug mode**:
+   - Configure the server to enable debugging, typically by adding JVM arguments like `-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:8000` to the server’s startup command or `server.xml`. The port (e.g., 8000) can be customized.
+2. **Set up a remote debug configuration in IntelliJ IDEA**:
+   - Go to `Run > Edit Configurations`, add a new `Remote JVM Debug` configuration, and specify the host (e.g., localhost) and the debug port (e.g., 8000).
+3. **Attach the debugger**:
+   - Start the server, then run the remote debug configuration in IntelliJ IDEA to connect to the server and begin debugging.
+
+This method works universally with any Java application server, including WebSphere Liberty, and doesn’t require a specific plugin.
+
+### Summary
+- **Yes**, IntelliJ IDEA can debug applications on WebSphere Liberty Server.
+- **Does it have a Liberty Tools plugin?** Yes, it has one similar to Eclipse’s, offering integrated debugging and server management.
+- **Other choices?** You can use remote debugging as an alternative, which is a standard, plugin-free option.
+
+Both approaches are effective, with the Liberty Tools plugin providing a more streamlined experience and remote debugging offering flexibility.