demo-hotswap

URLClassLoader HotSwap This demo check customized URLClassLoader's hotswap feature in spring boot environment.

You can run the test in this way

• git clone code to local desktop
• build code: mvn clean package
• mv demo-hotswap-0.0.1-SNAPSHOT.war demo.war
• copy demo.war to you workspace
• build and move test.jar to /tmp
  • jar cvf test.jar com/stone/jdk/demohotswap/swapClass/SwapMe.class
• run demo.war in jetty with two ways
  • java -cp jetty-runner-9.4.14.v20181114.jar org.eclipse.jetty.runner.Runner demo.war
  • java -jar demo.war
• access endpoint http://localhost:8080/swap
• update SwapMe.java, build and replace test.jar
• access endpoint http://localhost:8080/swap again

root cause is discussed at

• spring-projects/spring-boot#18300
• spring-projects/spring-boot#15964