This is a simple hot deployment plugin framework in java , which can dynamically load and unload jar files. It contains 2 jar files as plugin examples,the plugin project is here

When the program is started , it will load configuration , and load jar files , and then start a thread to listen the changes in the plugin folder , if a jar file is created in the plugin folder, the program will see if it is a configured jar file , if the answer is yes ,then the program will load the jar file.

Once started ,the program will listen to the deletion event in the plugin folder ,if a jar file deleteion event presents ,the program will see if it has been loaded ,if the answer is yes ,the program will unload the jar file.

In this way , this framework is able to dynamically load and unload jar file, so we can add ,update or remove services in production environment without interruption.

• Make sure the configuration is correct,which is in /config/plugin.json

• Implement the PluginInterface.java interface, or extends the DefaultPlugin.java class, examples are here, make sure to add module dependency to the plugin implemention project.

• Build artifact in Intellij idea , or export lib in Eclipse

• Put the jar file to /plugin/ folder

• Just remove the jar file in /plugin/ folder

The test case shows how the plugin process data in json, in order to understand the test case, you should read the codes.