to provide a working solution for typical application setups.to check "real world" plugin usage during plugin development (i.e.complex automate integration tests (check various configurations before a release, see run-tests.sh script).The purpose of an example application is: HotswapAgent adds watchResources configuration.HotswapAgent extraClasspath is similar to JRebel configuration.You need a special IDE plugin to fix debugging. JRebel modifies bytecode of all classes on reload.JRebel is neither open source nor free.JRebel is currently more mature and contains more plugins.HotswapAgent does not need any additional configuration for basic project setup.HotswapAgent (DCEVM) supports Java8, Java11 and Java17!.Should you have any problems or questions, ask at HotswapAgent forum. Fast - until the plugin is initialized, it does not consume any resources or slow down the application (see Runtime overhead for more information).Framework support - through plugin-system, many frameworks are supported.Other resources like src/main/resources? Use watchResources property to add any directory to watch for a resource change. Reload resource after a change - resources from the webapp directory are usually reloaded by the application server.Extra classpath - Need change a runtime class inside dependent JAR? Use extraClasspath property to add any directory.Automatic configuration - all local classes and resources, known to the running Java application, are automaticallyĭiscovered and watched for the reload (all files on the local filesystem, not inside the any JAR file).This setup allows even reload on a production system without a restart. or set autoHotswap property -XXaltjvm=dcevm -javaagent:PATH_TO_AGENT\hotswap-agent.jar=autoHotswap=true to reloadĬhanged classes after compilation.You can use standard Java Hotswap from IDE in debug mode to reload changed class.Is hierarchy change (change the superclass or remove an interface). Enhanced Java Hotswap - change method body, add/rename a method, field.Thank you for any help! What is available? There is always a need for documentation improvement :-). You can start by creating a plugin inside your application or by writing anĮxample/integration test. This project is very complex due to a lot of supported frameworks and various versions. To write your custom plugin even as part of your application. Hotswap agent works as a plugin system and is shipped preconfigured with all major framework plugins. Hibernate configuration reload after new entity class is introduced). Up-to-date after class redefinition (e.g. ) needs a special reloading mechanism to keep Save a changed resource and/or use the HotSwap feature of your IDE to reload changes PluginsĮach application framework (Spring, Hibernate, Logback. HOTSWAP AGENT: 9:49:38.700 INFO (.spring.SpringPlugin) - Spring plugin initialized - Spring core version '3.2.3.RELEASE' HOTSWAP AGENT: 9:49:29.725 INFO (.PluginRegistry) - Discovered plugins: HOTSWAP AGENT: 9:49:29.548 INFO () - Loading Hotswap agent - unlimited runtime class redefinition. Start the application in debug mode, check that the agent and plugins are initialized correctly: Optionally you can add hotswap-agent.properties to your application to configure plugins and agent's behavior. Java8: launch your application with the options -XXaltjvm=dcevm -javaagent:hotswap-agent.jar to get a basic setup.Java11: launch your application with the options -XX:HotswapAgent=fatjar to use Hotswap Agent fatjar release.Java17: launch your application with the options -XX: AllowEnhancedClassRedefinition -XX:HotswapAgent=fatjar to turn on advanced hotswap (dcevm) and use Hotswap Agent fatjar release.TravaJDK already contains embedded HotswapAgent. For Java11: jdk11-dcevm with integrated HotswapAgent and install it as an alternative JDK.The latest Hotswap Agent can be found here For Java17: latest JBR17 and since JBR17 does not include a built-in Hotswap Agent, copy hotswap-agent.jar to the lib/hotswap folder.Lately, this schema evolved into a new paradigm in the Java world, based on the development of software in running application, that approach can be used even in a closed environment like Docker. Originally, the main purpose of this project was to avoid the infamous change code-> restart and wait.-> check development lifecycle. Java unlimited runtime class and resource redefinition. This is an overview page, please visit for more information.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |