No, files asked by support do not contain your source code, although might contain some class info (specified below). JRebel agent does use it to instrument the application server class loaders and other basic classes, but the API does not play part in the actual reloading process. Unfortunately it is limited to only changing method bodies (as is HotSwap) and also suffers from several additional quirks, which makes it not too useful in a real environment. The Instrumentation API was introduced in Java 5 and included a limited ability to redefine Java classes on-the-fly. However throwing away those instances is only possible if they are somehow managed by the framework, e.g. The problem is that unless you also throw away all of the instances of the classes loaded by said class loaders, the code will not reload. The solution of reloading Java classes by wrapping them in throwaway classloaders is a well-known one, but unfortunately also very limited. In fact JRebel does not add a single new class loader to your application. JRebel just wraps class loaders around classes.This allows the application to just continue working, but also means that when adding a new instance field it will not be initialized in the existing instances, since the constructor will not be rerun. Importantly, when loading updates to a class, JRebel preserves all of the existing instances of that class. class files in JARs if they are specified in rebel.xml. class file timestamp is then monitored for changes in the loaded class and updates are propagated through the extended class loader, to your application. class file JRebel instruments the loaded class and associates it with the found. It will search from the classpath (including an application classpath, like WEB-INF/classes) and from the places specified in the rebel.xml configuration file. When a class is loaded JRebel will try to find a corresponding. It does not create any new class loaders, instead, it extends the existing ones with the ability to manage reloaded classes. JRebel integrates with the JVM and application servers mainly on the class loader level. JRebel works with all prominent JVM implementations. JRebel does not require you to make any changes to the JVM. JRebel does work with all prominent application servers, but it is not one itself. You can remove it at any moment and continue developing the way you did previously. JRebel does not introduce any dependencies in your application. JRebel comes pre-bundled with the plugins for Eclipse, IntelliJ IDEA, NetBeans and JDeveloper, however, JRebel agent is designed to be IDE-agnostic and can be used outside the IDE. There is no installation process: just unzip, copy, add options to the command line and enjoy! Even easier when using a JRebel IDE plugin. The -agentpath command line option allows custom instrumentation plugins to be registered. This is done without having to restart the container or redeploy the application. JRebel decreases turnaround by instantly reloading changes to your code.
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