use of org.springsource.loaded.TypeRegistry.ReloadableTypeNameDecision in project spring-loaded by spring-projects.
the class SpringLoadedPreProcessor method preProcess.
/**
* Main entry point to Spring Loaded when it is running as an agent. This method will use the classLoader and the
* class name in order to determine whether the type should be made reloadable. Non-reloadable types will at least
* get their call sites rewritten.
*
* @param classLoader the classloader loading this type
* @param slashedClassName the slashed class name (e.g. java/lang/String) being loaded
* @param protectionDomain the protection domain for the loaded class
* @param bytes the class bytes for the class being loaded
* @return potentially modified bytes
*/
public byte[] preProcess(ClassLoader classLoader, String slashedClassName, ProtectionDomain protectionDomain, byte[] bytes) {
if (disabled) {
return bytes;
}
// TODO need configurable debug here, ability to dump any code before/after
for (Plugin plugin : getGlobalPlugins()) {
if (plugin instanceof LoadtimeInstrumentationPlugin) {
LoadtimeInstrumentationPlugin loadtimeInstrumentationPlugin = (LoadtimeInstrumentationPlugin) plugin;
if (loadtimeInstrumentationPlugin.accept(slashedClassName, classLoader, protectionDomain, bytes)) {
bytes = loadtimeInstrumentationPlugin.modify(slashedClassName, classLoader, bytes);
}
}
}
tryToEnsureSystemClassesInitialized(slashedClassName);
TypeRegistry typeRegistry = TypeRegistry.getTypeRegistryFor(classLoader);
if (GlobalConfiguration.verboseMode && log.isLoggable(Level.INFO)) {
logPreProcess(classLoader, slashedClassName, typeRegistry);
}
if (typeRegistry == null) {
// A null type registry indicates nothing is being made reloadable for the classloader
if (classLoader == null && slashedClassName != null) {
// Indicates loading of a system class
if (systemClassesContainingReflection.contains(slashedClassName)) {
try {
// TODO [perf] why are we not using the cache here, is it because the list is so short?
RewriteResult rr = SystemClassReflectionRewriter.rewrite(slashedClassName, bytes);
if (GlobalConfiguration.verboseMode && log.isLoggable(Level.INFO)) {
log.info("System class rewritten: name=" + slashedClassName + " rewrite summary=" + rr.summarize());
}
systemClassesRequiringInitialization.put(slashedClassName, rr.bits);
return rr.bytes;
} catch (Exception re) {
re.printStackTrace();
}
} else if (slashedClassName.equals("java/lang/invoke/InnerClassLambdaMetafactory")) {
bytes = Java8.enhanceInnerClassLambdaMetaFactory(bytes);
return bytes;
} else if ((GlobalConfiguration.investigateSystemClassReflection || GlobalConfiguration.rewriteAllSystemClasses) && SystemClassReflectionInvestigator.investigate(slashedClassName, bytes, GlobalConfiguration.investigateSystemClassReflection) > 0) {
// This block can help when you suspect there is a system class using reflection and that
// class isn't on the 'shortlist' (in systemClassesContainingReflection). Basically turn on the
// options to trigger this investigation then add them to the shortlist if it looks like they need rewriting.
RewriteResult rr = SystemClassReflectionRewriter.rewrite(slashedClassName, bytes);
if (GlobalConfiguration.rewriteAllSystemClasses) {
systemClassesRequiringInitialization.put(slashedClassName, rr.bits);
return rr.bytes;
} else {
System.err.println("Type " + slashedClassName + " rewrite summary: " + rr.summarize());
return bytes;
}
}
}
return bytes;
}
// What happens here? The aim is to determine if the type should be made reloadable.
// 1. If NO, but something in this classloader might be, then rewrite the call sites.
// 2. If NO, and nothing in this classloader might be, return the original bytes.
// 3. If YES, make the type reloadable (including rewriting call sites)
ReloadableTypeNameDecision isReloadableTypeName = typeRegistry.isReloadableTypeName(slashedClassName, protectionDomain, bytes);
if (isReloadableTypeName.isReloadable && GlobalConfiguration.explainMode && log.isLoggable(Level.INFO)) {
log.info("[explanation] Based on the name, type " + slashedClassName + " is considered to be reloadable");
}
// }
if (isReloadableTypeName.isReloadable) {
if (!firstReloadableTypeHit) {
firstReloadableTypeHit = true;
// TODO move into the ctor for ReloadableType so that it can't block loading
tryToEnsureSystemClassesInitialized(slashedClassName);
}
if (GlobalConfiguration.isRuntimeLogging && log.isLoggable(Level.INFO)) {
log.info("processing " + slashedClassName + " as a reloadable type");
}
try {
// TODO decide one way or the other on slashed/dotted from preprocessor to infrastructure
String dottedClassName = slashedClassName.replace('/', '.');
String watchPath = getWatchPathFromProtectionDomain(protectionDomain, slashedClassName);
if (watchPath == null) {
// For a CGLIB generated type, we may still need to make the type reloadable. For example:
// type: com/vmware/rabbit/ApplicationContext$$EnhancerByCGLIB$$512eb60c
// codesource determined to be: file:/Users/aclement/springsource/tc-server-developer-2.1.1.RELEASE/spring-insight-instance/wtpwebapps/hello-rabbit-client/WEB-INF/lib/cglib-nodep-2.2.jar <no signer certificates>
// But if the type 'com/vmware/rabbit/ApplicationContext' is reloadable, then this should be too
boolean makeReloadableAnyway = false;
int cglibIndex = slashedClassName.indexOf("$$EnhancerBy");
if (cglibIndex != -1) {
String originalType = slashedClassName.substring(0, cglibIndex);
if (GlobalConfiguration.isRuntimeLogging && log.isLoggable(Level.INFO)) {
log.info("Appears to be a CGLIB type, checking if type " + originalType + " is reloadable");
}
TypeRegistry currentRegistry = typeRegistry;
while (currentRegistry != null) {
ReloadableType originalReloadable = currentRegistry.getReloadableType(originalType);
if (originalReloadable != null) {
makeReloadableAnyway = true;
break;
}
currentRegistry = currentRegistry.getParentRegistry();
}
// if (typeRegistry.isReloadableTypeName(originalType)) {
// if (GlobalConfiguration.isRuntimeLogging && log.isLoggable(Level.INFO)) {
// log.info("Type " + originalType + " is reloadable, so making CGLIB type " + slashedClassName
// + " reloadable");
// }
// makeReloadableAnyway = true;
// }
}
int cglibIndex2 = makeReloadableAnyway ? -1 : slashedClassName.indexOf("$$FastClassByCGLIB");
if (cglibIndex2 != -1) {
String originalType = slashedClassName.substring(0, cglibIndex2);
if (GlobalConfiguration.isRuntimeLogging && log.isLoggable(Level.INFO)) {
log.info("Appears to be a CGLIB FastClass type, checking if type " + originalType + " is reloadable");
}
TypeRegistry currentRegistry = typeRegistry;
while (currentRegistry != null) {
ReloadableType originalReloadable = currentRegistry.getReloadableType(originalType);
if (originalReloadable != null) {
makeReloadableAnyway = true;
break;
}
currentRegistry = currentRegistry.getParentRegistry();
}
// if (typeRegistry.isReloadableTypeName(originalType)) {
// if (GlobalConfiguration.isRuntimeLogging && log.isLoggable(Level.INFO)) {
// log.info("Type " + originalType + " is reloadable, so making CGLIB type " + slashedClassName
// + " reloadable");
// }
// makeReloadableAnyway = true;
// }
}
int proxyIndex = makeReloadableAnyway ? -1 : slashedClassName.indexOf("$Proxy");
if (proxyIndex == 0 || (proxyIndex > 0 && slashedClassName.charAt(proxyIndex - 1) == '/')) {
// Determine if the interfaces being implemented are reloadable
String[] interfacesImplemented = Utils.discoverInterfaces(bytes);
if (interfacesImplemented != null) {
for (int i = 0; i < interfacesImplemented.length; i++) {
TypeRegistry currentRegistry = typeRegistry;
while (currentRegistry != null) {
ReloadableType originalReloadable = currentRegistry.getReloadableType(interfacesImplemented[i]);
if (originalReloadable != null) {
makeReloadableAnyway = true;
break;
}
currentRegistry = currentRegistry.getParentRegistry();
}
// if (typeRegistry.isReloadableTypeName(interfacesImplemented[i])) {
// makeReloadableAnyway = true;
// }
}
}
}
// all classloaders below one loading reloadable stuff should also load reloadable stuff.
if (!makeReloadableAnyway && classLoader.getClass().getName().endsWith("GroovyClassLoader$InnerLoader")) {
makeReloadableAnyway = true;
}
if (!makeReloadableAnyway) {
// else {
if (GlobalConfiguration.verboseMode) {
Log.log("Cannot watch " + slashedClassName + ": not making it reloadable");
}
if (needsClientSideRewriting(slashedClassName)) {
bytes = typeRegistry.methodCallRewriteUseCacheIfAvailable(slashedClassName, bytes);
}
return bytes;
// }
}
}
ReloadableType rtype = typeRegistry.addType(dottedClassName, bytes);
if (rtype == null && GlobalConfiguration.callsideRewritingOn) {
// it is not a candidate for being made reloadable (maybe it is an annotation type)
// but we still need to rewrite call sites.
bytes = typeRegistry.methodCallRewrite(bytes);
} else {
if (GlobalConfiguration.fileSystemMonitoring && watchPath != null) {
typeRegistry.monitorForUpdates(rtype, watchPath);
}
return rtype.bytesLoaded;
}
} catch (RuntimeException re) {
log.throwing("SpringLoadedPreProcessor", "preProcess", re);
throw re;
}
} else {
try {
// with due to GroovyPlugin class that intercepts define in that infrastructure
if (needsClientSideRewriting(slashedClassName) && (classLoader == null || !classLoader.getClass().getName().equals("org.codehaus.groovy.runtime.callsite.CallSiteClassLoader"))) {
bytes = typeRegistry.methodCallRewriteUseCacheIfAvailable(slashedClassName, bytes);
}
} catch (Throwable t) {
log.log(Level.SEVERE, "Unexpected problem transforming call sites", t);
}
}
return bytes;
}
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