mirror of
https://github.com/scm-manager/scm-manager.git
synced 2025-11-13 08:55:44 +01:00
implemented simple ClassLoaderLifeCycle to fix integration tests on Java > 8
This commit is contained in:
Sebastian Sdorra
@@ -3,198 +3,75 @@ package sonia.scm.lifecycle.classloading;
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import com.google.common.annotations.VisibleForTesting;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import se.jiderhamn.classloader.leak.prevention.ClassLoaderLeakPreventor;
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import se.jiderhamn.classloader.leak.prevention.ClassLoaderLeakPreventorFactory;
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import se.jiderhamn.classloader.leak.prevention.cleanup.IIOServiceProviderCleanUp;
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import se.jiderhamn.classloader.leak.prevention.cleanup.MBeanCleanUp;
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import se.jiderhamn.classloader.leak.prevention.cleanup.ShutdownHookCleanUp;
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import se.jiderhamn.classloader.leak.prevention.cleanup.StopThreadsCleanUp;
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import se.jiderhamn.classloader.leak.prevention.preinit.AwtToolkitInitiator;
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import se.jiderhamn.classloader.leak.prevention.preinit.Java2dDisposerInitiator;
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import se.jiderhamn.classloader.leak.prevention.preinit.Java2dRenderQueueInitiator;
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import se.jiderhamn.classloader.leak.prevention.preinit.SunAwtAppContextInitiator;
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import sonia.scm.lifecycle.LifeCycle;
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import sonia.scm.plugin.ChildFirstPluginClassLoader;
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import sonia.scm.plugin.DefaultPluginClassLoader;
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import java.io.Closeable;
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import java.io.IOException;
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import java.net.URL;
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import java.util.ArrayDeque;
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import java.util.Deque;
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import static com.google.common.base.Preconditions.checkState;
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import static se.jiderhamn.classloader.leak.prevention.cleanup.ShutdownHookCleanUp.SHUTDOWN_HOOK_WAIT_MS_DEFAULT;
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/**
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* Creates and shutdown SCM-Manager ClassLoaders.
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* Base class for ClassLoader LifeCycle implementation in SCM-Manager.
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*/
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public final class ClassLoaderLifeCycle implements LifeCycle {
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public abstract class ClassLoaderLifeCycle implements LifeCycle {
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private static final Logger LOG = LoggerFactory.getLogger(ClassLoaderLifeCycle.class);
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private Deque<ClassLoaderAndPreventor> classLoaders = new ArrayDeque<>();
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@VisibleForTesting
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static final String PROPERTY = "sonia.scm.classloading.lifecycle";
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public static ClassLoaderLifeCycle create() {
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ClassLoader webappClassLoader = Thread.currentThread().getContextClassLoader();
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String implementation = System.getProperty(PROPERTY);
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if (SimpleClassLoaderLifeCycle.NAME.equalsIgnoreCase(implementation)) {
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LOG.info("create new simple ClassLoaderLifeCycle");
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return new SimpleClassLoaderLifeCycle(webappClassLoader);
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}
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LOG.info("create new ClassLoaderLifeCycle with leak prevention");
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return new ClassLoaderLifeCycleWithLeakPrevention(webappClassLoader);
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}
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private final ClassLoaderLeakPreventorFactory classLoaderLeakPreventorFactory;
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private final ClassLoader webappClassLoader;
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private BootstrapClassLoader bootstrapClassLoader;
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private ClassLoaderAppendListener classLoaderAppendListener = new ClassLoaderAppendListener() {
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@Override
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public <C extends ClassLoader> C apply(C classLoader) {
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return classLoader;
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}
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};
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@VisibleForTesting
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public static ClassLoaderLifeCycle create() {
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ClassLoader webappClassLoader = Thread.currentThread().getContextClassLoader();
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ClassLoaderLeakPreventorFactory classLoaderLeakPreventorFactory = createClassLoaderLeakPreventorFactory(webappClassLoader);
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return new ClassLoaderLifeCycle(webappClassLoader, classLoaderLeakPreventorFactory);
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}
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ClassLoaderLifeCycle(ClassLoader webappClassLoader, ClassLoaderLeakPreventorFactory classLoaderLeakPreventorFactory) {
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this.classLoaderLeakPreventorFactory = classLoaderLeakPreventorFactory;
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this.webappClassLoader = initAndAppend(webappClassLoader);
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}
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private static ClassLoaderLeakPreventorFactory createClassLoaderLeakPreventorFactory(ClassLoader webappClassLoader) {
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// Should threads tied to the web app classloader be forced to stop at application shutdown?
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boolean stopThreads = Boolean.getBoolean("ClassLoaderLeakPreventor.stopThreads");
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// Should Timer threads tied to the web app classloader be forced to stop at application shutdown?
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boolean stopTimerThreads = Boolean.getBoolean("ClassLoaderLeakPreventor.stopTimerThreads");
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// Should shutdown hooks registered from the application be executed at application shutdown?
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boolean executeShutdownHooks = Boolean.getBoolean("ClassLoaderLeakPreventor.executeShutdownHooks");
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// No of milliseconds to wait for threads to finish execution, before stopping them.
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int threadWaitMs = Integer.getInteger("ClassLoaderLeakPreventor.threadWaitMs", ClassLoaderLeakPreventor.THREAD_WAIT_MS_DEFAULT);
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/*
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* No of milliseconds to wait for shutdown hooks to finish execution, before stopping them.
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* If set to -1 there will be no waiting at all, but Thread is allowed to run until finished.
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*/
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int shutdownHookWaitMs = Integer.getInteger("ClassLoaderLeakPreventor.shutdownHookWaitMs", SHUTDOWN_HOOK_WAIT_MS_DEFAULT);
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LOG.info("Settings for {} (CL: 0x{}):", ClassLoaderLifeCycle.class.getName(), Integer.toHexString(System.identityHashCode(webappClassLoader)) );
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LOG.info(" stopThreads = {}", stopThreads);
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LOG.info(" stopTimerThreads = {}", stopTimerThreads);
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LOG.info(" executeShutdownHooks = {}", executeShutdownHooks);
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LOG.info(" threadWaitMs = {} ms", threadWaitMs);
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LOG.info(" shutdownHookWaitMs = {} ms", shutdownHookWaitMs);
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// use webapp classloader as safe base? or system?
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ClassLoaderLeakPreventorFactory classLoaderLeakPreventorFactory = new ClassLoaderLeakPreventorFactory(webappClassLoader);
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classLoaderLeakPreventorFactory.setLogger(new LoggingAdapter());
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final ShutdownHookCleanUp shutdownHookCleanUp = classLoaderLeakPreventorFactory.getCleanUp(ShutdownHookCleanUp.class);
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shutdownHookCleanUp.setExecuteShutdownHooks(executeShutdownHooks);
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shutdownHookCleanUp.setShutdownHookWaitMs(shutdownHookWaitMs);
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final StopThreadsCleanUp stopThreadsCleanUp = classLoaderLeakPreventorFactory.getCleanUp(StopThreadsCleanUp.class);
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stopThreadsCleanUp.setStopThreads(stopThreads);
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stopThreadsCleanUp.setStopTimerThreads(stopTimerThreads);
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stopThreadsCleanUp.setThreadWaitMs(threadWaitMs);
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// remove awt and imageio cleanup
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classLoaderLeakPreventorFactory.removePreInitiator(AwtToolkitInitiator.class);
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classLoaderLeakPreventorFactory.removePreInitiator(SunAwtAppContextInitiator.class);
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classLoaderLeakPreventorFactory.removeCleanUp(IIOServiceProviderCleanUp.class);
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classLoaderLeakPreventorFactory.removePreInitiator(Java2dRenderQueueInitiator.class);
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classLoaderLeakPreventorFactory.removePreInitiator(Java2dDisposerInitiator.class);
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// the MBeanCleanUp causes a Exception and we use no mbeans
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classLoaderLeakPreventorFactory.removeCleanUp(MBeanCleanUp.class);
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return classLoaderLeakPreventorFactory;
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ClassLoaderLifeCycle(ClassLoader webappClassLoader) {
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this.webappClassLoader = webappClassLoader;
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}
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@Override
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public void initialize() {
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bootstrapClassLoader = initAndAppend(new BootstrapClassLoader(webappClassLoader));
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}
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@VisibleForTesting
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void setClassLoaderAppendListener(ClassLoaderAppendListener classLoaderAppendListener) {
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this.classLoaderAppendListener = classLoaderAppendListener;
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}
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protected abstract <T extends ClassLoader> T initAndAppend(T classLoader);
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public ClassLoader getBootstrapClassLoader() {
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checkState(bootstrapClassLoader != null, "%s was not initialized", ClassLoaderLifeCycle.class.getName());
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return bootstrapClassLoader;
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}
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public ClassLoader createPluginClassLoader(URL[] urls, ClassLoader parent, String plugin) {
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LOG.debug("create new PluginClassLoader for {}", plugin);
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DefaultPluginClassLoader pluginClassLoader = new DefaultPluginClassLoader(urls, parent, plugin);
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return initAndAppend(pluginClassLoader);
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}
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public ClassLoader createChildFirstPluginClassLoader(URL[] urls, ClassLoader parent, String plugin) {
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LOG.debug("create new ChildFirstPluginClassLoader for {}", plugin);
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ChildFirstPluginClassLoader pluginClassLoader = new ChildFirstPluginClassLoader(urls, parent, plugin);
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return initAndAppend(pluginClassLoader);
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}
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public ClassLoader createPluginClassLoader(URL[] urls, ClassLoader parent, String plugin) {
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LOG.debug("create new PluginClassLoader for {}", plugin);
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DefaultPluginClassLoader pluginClassLoader = new DefaultPluginClassLoader(urls, parent, plugin);
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return initAndAppend(pluginClassLoader);
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}
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@Override
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public void shutdown() {
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LOG.info("shutdown classloader infrastructure");
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ClassLoaderAndPreventor clap = classLoaders.poll();
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while (clap != null) {
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clap.shutdown();
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clap = classLoaders.poll();
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}
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// be sure it is realy empty
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classLoaders.clear();
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classLoaders = new ArrayDeque<>();
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shutdownClassLoaders();
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bootstrapClassLoader.markAsShutdown();
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bootstrapClassLoader = null;
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}
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private <T extends ClassLoader> T initAndAppend(T originalClassLoader) {
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LOG.debug("init classloader {}", originalClassLoader);
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T classLoader = classLoaderAppendListener.apply(originalClassLoader);
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ClassLoaderLeakPreventor preventor = classLoaderLeakPreventorFactory.newLeakPreventor(classLoader);
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preventor.runPreClassLoaderInitiators();
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classLoaders.push(new ClassLoaderAndPreventor(classLoader, preventor));
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return classLoader;
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}
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interface ClassLoaderAppendListener {
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<C extends ClassLoader> C apply(C classLoader);
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}
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private class ClassLoaderAndPreventor {
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private final ClassLoader classLoader;
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private final ClassLoaderLeakPreventor preventor;
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private ClassLoaderAndPreventor(ClassLoader classLoader, ClassLoaderLeakPreventor preventor) {
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this.classLoader = classLoader;
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this.preventor = preventor;
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}
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void shutdown() {
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LOG.debug("shutdown classloader {}", classLoader);
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preventor.runCleanUps();
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if (classLoader != webappClassLoader) {
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close();
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}
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}
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private void close() {
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if (classLoader instanceof Closeable) {
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LOG.trace("close classloader {}", classLoader);
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try {
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((Closeable) classLoader).close();
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} catch (IOException e) {
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LOG.warn("failed to close classloader", e);
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}
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}
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}
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}
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protected abstract void shutdownClassLoaders();
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}
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@@ -0,0 +1,163 @@
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package sonia.scm.lifecycle.classloading;
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import com.google.common.annotations.VisibleForTesting;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import se.jiderhamn.classloader.leak.prevention.ClassLoaderLeakPreventor;
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import se.jiderhamn.classloader.leak.prevention.ClassLoaderLeakPreventorFactory;
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import se.jiderhamn.classloader.leak.prevention.cleanup.IIOServiceProviderCleanUp;
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import se.jiderhamn.classloader.leak.prevention.cleanup.MBeanCleanUp;
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import se.jiderhamn.classloader.leak.prevention.cleanup.ShutdownHookCleanUp;
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import se.jiderhamn.classloader.leak.prevention.cleanup.StopThreadsCleanUp;
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import se.jiderhamn.classloader.leak.prevention.preinit.AwtToolkitInitiator;
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import se.jiderhamn.classloader.leak.prevention.preinit.Java2dDisposerInitiator;
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import se.jiderhamn.classloader.leak.prevention.preinit.Java2dRenderQueueInitiator;
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import se.jiderhamn.classloader.leak.prevention.preinit.SunAwtAppContextInitiator;
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import java.io.Closeable;
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import java.io.IOException;
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import java.util.ArrayDeque;
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import java.util.Deque;
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import static se.jiderhamn.classloader.leak.prevention.cleanup.ShutdownHookCleanUp.SHUTDOWN_HOOK_WAIT_MS_DEFAULT;
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/**
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* Creates and shutdown SCM-Manager ClassLoaders with ClassLoader leak detection.
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*/
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final class ClassLoaderLifeCycleWithLeakPrevention extends ClassLoaderLifeCycle {
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private static final Logger LOG = LoggerFactory.getLogger(ClassLoaderLifeCycleWithLeakPrevention.class);
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private Deque<ClassLoaderAndPreventor> classLoaders = new ArrayDeque<>();
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private final ClassLoaderLeakPreventorFactory classLoaderLeakPreventorFactory;
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private ClassLoaderAppendListener classLoaderAppendListener = new ClassLoaderAppendListener() {
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@Override
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public <C extends ClassLoader> C apply(C classLoader) {
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return classLoader;
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}
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};
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ClassLoaderLifeCycleWithLeakPrevention(ClassLoader webappClassLoader) {
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this(webappClassLoader, createClassLoaderLeakPreventorFactory(webappClassLoader));
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}
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ClassLoaderLifeCycleWithLeakPrevention(ClassLoader webappClassLoader, ClassLoaderLeakPreventorFactory classLoaderLeakPreventorFactory) {
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super(webappClassLoader);
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this.classLoaderLeakPreventorFactory = classLoaderLeakPreventorFactory;
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}
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private static ClassLoaderLeakPreventorFactory createClassLoaderLeakPreventorFactory(ClassLoader webappClassLoader) {
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// Should threads tied to the web app classloader be forced to stop at application shutdown?
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boolean stopThreads = Boolean.getBoolean("ClassLoaderLeakPreventor.stopThreads");
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// Should Timer threads tied to the web app classloader be forced to stop at application shutdown?
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boolean stopTimerThreads = Boolean.getBoolean("ClassLoaderLeakPreventor.stopTimerThreads");
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// Should shutdown hooks registered from the application be executed at application shutdown?
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boolean executeShutdownHooks = Boolean.getBoolean("ClassLoaderLeakPreventor.executeShutdownHooks");
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// No of milliseconds to wait for threads to finish execution, before stopping them.
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int threadWaitMs = Integer.getInteger("ClassLoaderLeakPreventor.threadWaitMs", ClassLoaderLeakPreventor.THREAD_WAIT_MS_DEFAULT);
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/*
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* No of milliseconds to wait for shutdown hooks to finish execution, before stopping them.
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* If set to -1 there will be no waiting at all, but Thread is allowed to run until finished.
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*/
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int shutdownHookWaitMs = Integer.getInteger("ClassLoaderLeakPreventor.shutdownHookWaitMs", SHUTDOWN_HOOK_WAIT_MS_DEFAULT);
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LOG.info("Settings for {} (CL: 0x{}):", ClassLoaderLifeCycleWithLeakPrevention.class.getName(), Integer.toHexString(System.identityHashCode(webappClassLoader)) );
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LOG.info(" stopThreads = {}", stopThreads);
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LOG.info(" stopTimerThreads = {}", stopTimerThreads);
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LOG.info(" executeShutdownHooks = {}", executeShutdownHooks);
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LOG.info(" threadWaitMs = {} ms", threadWaitMs);
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LOG.info(" shutdownHookWaitMs = {} ms", shutdownHookWaitMs);
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// use webapp classloader as safe base? or system?
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ClassLoaderLeakPreventorFactory classLoaderLeakPreventorFactory = new ClassLoaderLeakPreventorFactory(webappClassLoader);
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classLoaderLeakPreventorFactory.setLogger(new LoggingAdapter());
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final ShutdownHookCleanUp shutdownHookCleanUp = classLoaderLeakPreventorFactory.getCleanUp(ShutdownHookCleanUp.class);
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shutdownHookCleanUp.setExecuteShutdownHooks(executeShutdownHooks);
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shutdownHookCleanUp.setShutdownHookWaitMs(shutdownHookWaitMs);
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final StopThreadsCleanUp stopThreadsCleanUp = classLoaderLeakPreventorFactory.getCleanUp(StopThreadsCleanUp.class);
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stopThreadsCleanUp.setStopThreads(stopThreads);
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stopThreadsCleanUp.setStopTimerThreads(stopTimerThreads);
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stopThreadsCleanUp.setThreadWaitMs(threadWaitMs);
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// remove awt and imageio cleanup
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classLoaderLeakPreventorFactory.removePreInitiator(AwtToolkitInitiator.class);
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classLoaderLeakPreventorFactory.removePreInitiator(SunAwtAppContextInitiator.class);
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classLoaderLeakPreventorFactory.removeCleanUp(IIOServiceProviderCleanUp.class);
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classLoaderLeakPreventorFactory.removePreInitiator(Java2dRenderQueueInitiator.class);
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classLoaderLeakPreventorFactory.removePreInitiator(Java2dDisposerInitiator.class);
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// the MBeanCleanUp causes a Exception and we use no mbeans
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classLoaderLeakPreventorFactory.removeCleanUp(MBeanCleanUp.class);
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return classLoaderLeakPreventorFactory;
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}
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@VisibleForTesting
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void setClassLoaderAppendListener(ClassLoaderAppendListener classLoaderAppendListener) {
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this.classLoaderAppendListener = classLoaderAppendListener;
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}
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@Override
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protected void shutdownClassLoaders() {
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ClassLoaderAndPreventor clap = classLoaders.poll();
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while (clap != null) {
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clap.shutdown();
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clap = classLoaders.poll();
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}
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// be sure it is realy empty
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classLoaders.clear();
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classLoaders = new ArrayDeque<>();
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}
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@Override
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protected <T extends ClassLoader> T initAndAppend(T originalClassLoader) {
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LOG.debug("init classloader {}", originalClassLoader);
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T classLoader = classLoaderAppendListener.apply(originalClassLoader);
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ClassLoaderLeakPreventor preventor = classLoaderLeakPreventorFactory.newLeakPreventor(classLoader);
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preventor.runPreClassLoaderInitiators();
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classLoaders.push(new ClassLoaderAndPreventor(classLoader, preventor));
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return classLoader;
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}
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interface ClassLoaderAppendListener {
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<C extends ClassLoader> C apply(C classLoader);
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}
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private static class ClassLoaderAndPreventor {
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private final ClassLoader classLoader;
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private final ClassLoaderLeakPreventor preventor;
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private ClassLoaderAndPreventor(ClassLoader classLoader, ClassLoaderLeakPreventor preventor) {
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this.classLoader = classLoader;
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this.preventor = preventor;
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}
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void shutdown() {
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LOG.debug("shutdown classloader {}", classLoader);
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preventor.runCleanUps();
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close();
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}
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private void close() {
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if (classLoader instanceof Closeable) {
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LOG.trace("close classloader {}", classLoader);
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try {
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((Closeable) classLoader).close();
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} catch (IOException e) {
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LOG.warn("failed to close classloader", e);
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}
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}
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}
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}
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}
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@@ -0,0 +1,56 @@
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package sonia.scm.lifecycle.classloading;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.Closeable;
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import java.io.IOException;
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import java.util.ArrayDeque;
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import java.util.Deque;
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/**
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* Creates and shutdown SCM-Manager ClassLoaders with ClassLoader leak detection.
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*/
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class SimpleClassLoaderLifeCycle extends ClassLoaderLifeCycle {
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static final String NAME = "simple";
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private static final Logger LOG = LoggerFactory.getLogger(SimpleClassLoaderLifeCycle.class);
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private Deque<ClassLoader> classLoaders = new ArrayDeque<>();
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SimpleClassLoaderLifeCycle(ClassLoader webappClassLoader) {
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super(webappClassLoader);
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}
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@Override
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protected <T extends ClassLoader> T initAndAppend(T classLoader) {
|
||||
LOG.debug("init classloader {}", classLoader);
|
||||
classLoaders.push(classLoader);
|
||||
return classLoader;
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void shutdownClassLoaders() {
|
||||
ClassLoader classLoader = classLoaders.poll();
|
||||
while (classLoader != null) {
|
||||
shutdown(classLoader);
|
||||
classLoader = classLoaders.poll();
|
||||
}
|
||||
// be sure it is realy empty
|
||||
classLoaders.clear();
|
||||
classLoaders = new ArrayDeque<>();
|
||||
}
|
||||
|
||||
private void shutdown(ClassLoader classLoader) {
|
||||
LOG.debug("shutdown classloader {}", classLoader);
|
||||
if (classLoader instanceof Closeable) {
|
||||
LOG.trace("close classloader {}", classLoader);
|
||||
try {
|
||||
((Closeable) classLoader).close();
|
||||
} catch (IOException e) {
|
||||
LOG.warn("failed to close classloader", e);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user