Java Code Examples for java.beans.Introspector#flushCaches()

public static void main(String[] args) throws IntrospectionException {
    StringBuilder sb = null;
    if (args.length > 0) {
        if (args[0].equals("show")) {
            sb = new StringBuilder(65536);
        }
    }
    Introspector.flushCaches();
    int count = (sb != null) ? 10 : 100;
    long time = -System.currentTimeMillis();
    for (int i = 0; i < count; i++) {
        test(sb);
        test(sb);
        Introspector.flushCaches();
    }
    time += System.currentTimeMillis();
    System.out.println("Time (average): " + time / count);
}
 

public void run() {
    Introspector.flushCaches();

    test(FirstBean.class, FirstBeanBeanInfo.class);
    test(SecondBean.class, null);
    test(ThirdBean.class, null);
    test(ThirdBeanBeanInfo.class, ThirdBeanBeanInfo.class);

    Introspector.setBeanInfoSearchPath(SEARCH_PATH);
    Introspector.flushCaches();

    test(FirstBean.class, FirstBeanBeanInfo.class);
    test(SecondBean.class, SecondBeanBeanInfo.class);
    test(ThirdBean.class, null);
    test(ThirdBeanBeanInfo.class, ThirdBeanBeanInfo.class);
}
 

/**
 * Causes the specified classloader to be forgotten, making it and all
 * the class definitions loaded by it available for garbage collection
 * 
 * @param id the id of the classloader to forget
 */
public void forgetClassLoader(String id) {
  
  GateClassLoader gcl;
  
  synchronized(childClassLoaders) {
     gcl = childClassLoaders.remove(id);
  }

  if(gcl != null && !gcl.isIsolated()) {
    // in theory this shouldn't be needed as the Introspector uses
    // soft references if we move to requiring Java 8 it should be
    // safe to drop this call
    Introspector.flushCaches();

    AbstractResource.flushBeanInfoCache();
  }
}
 

public void run() {
    Introspector.flushCaches();

    test(FirstBean.class, FirstBeanBeanInfo.class);
    test(SecondBean.class, null);
    test(ThirdBean.class, null);
    test(ThirdBeanBeanInfo.class, ThirdBeanBeanInfo.class);

    Introspector.setBeanInfoSearchPath(SEARCH_PATH);
    Introspector.flushCaches();

    test(FirstBean.class, FirstBeanBeanInfo.class);
    test(SecondBean.class, SecondBeanBeanInfo.class);
    test(ThirdBean.class, null);
    test(ThirdBeanBeanInfo.class, ThirdBeanBeanInfo.class);
}
 

public static void main(String[] args) throws IntrospectionException {
    StringBuilder sb = null;
    if (args.length > 0) {
        if (args[0].equals("show")) {
            sb = new StringBuilder(65536);
        }
    }
    Introspector.flushCaches();
    int count = (sb != null) ? 10 : 100;
    long time = -System.currentTimeMillis();
    for (int i = 0; i < count; i++) {
        test(sb);
        test(sb);
        Introspector.flushCaches();
    }
    time += System.currentTimeMillis();
    System.out.println("Time (average): " + time / count);
}
 

public static void main(String[] args) throws IntrospectionException {
    StringBuilder sb = null;
    if (args.length > 0) {
        if (args[0].equals("show")) {
            sb = new StringBuilder(65536);
        }
    }
    Introspector.flushCaches();
    int count = (sb != null) ? 10 : 100;
    long time = -System.currentTimeMillis();
    for (int i = 0; i < count; i++) {
        test(sb);
        test(sb);
        Introspector.flushCaches();
    }
    time += System.currentTimeMillis();
    System.out.println("Time (average): " + time / count);
}
 

/**
 * Cleans well known class loader leaks in VMs and libraries.  There is a lot of bad code out there and this method
 * will clear up the know problems.  This method should only be called when the class loader will no longer be used.
 * It this method is called two often it can have a serious impact on preformance.
 */
public static void clearClassLoaderCaches() {
    clearSunSoftCache(ObjectInputStream.class, "subclassAudits");
    clearSunSoftCache(ObjectOutputStream.class, "subclassAudits");
    clearSunSoftCache(ObjectStreamClass.class, "localDescs");
    clearSunSoftCache(ObjectStreamClass.class, "reflectors");
    Introspector.flushCaches();
}
 

private static void test() {
    test("Bean", "Bean2", "Bean3", "Bean4");
    test("Bean4", "Bean", "Bean2", "Bean3");
    test("Bean3", "Bean4", "Bean", "Bean2");
    test("Bean2", "Bean3", "Bean4", "Bean");
    Introspector.flushCaches();
}
 

/**
 * This is a regression test to ensure that 4168475 does not regress.
 */
private static void test4168475(Class type) {
    String[] newPath = {"infos"};
    String[] oldPath = Introspector.getBeanInfoSearchPath();

    Introspector.setBeanInfoSearchPath(newPath);
    BeanInfo info = getBeanInfo(Boolean.TRUE, type);
    Introspector.setBeanInfoSearchPath(oldPath);

    PropertyDescriptor[] pds = info.getPropertyDescriptors();
    if (pds.length != 1) {
        throw new Error("could not find custom BeanInfo for " + type);
    }
    Introspector.flushCaches();
}
 

private static void test(Boolean mark, Class... types) {
    for (Class type : types) {
        BeanInfo info = getBeanInfo(mark, type);
        if (info == null) {
            throw new Error("could not find BeanInfo for " + type);
        }
        if (mark != info.getBeanDescriptor().getValue("test")) {
            throw new Error("could not find marked BeanInfo for " + type);
        }
    }
    Introspector.flushCaches();
}
 

private static void test() {
    test("Bean", "Bean2", "Bean3", "Bean4");
    test("Bean4", "Bean", "Bean2", "Bean3");
    test("Bean3", "Bean4", "Bean", "Bean2");
    test("Bean2", "Bean3", "Bean4", "Bean");
    Introspector.flushCaches();
}
 

private static void test() {
    test("Bean", "Bean2", "Bean3", "Bean4");
    test("Bean4", "Bean", "Bean2", "Bean3");
    test("Bean3", "Bean4", "Bean", "Bean2");
    test("Bean2", "Bean3", "Bean4", "Bean");
    Introspector.flushCaches();
}
 

/**
 * This is a regression test to ensure that 4168475 does not regress.
 */
private static void test4168475(Class type) {
    String[] newPath = {"infos"};
    String[] oldPath = Introspector.getBeanInfoSearchPath();

    Introspector.setBeanInfoSearchPath(newPath);
    BeanInfo info = getBeanInfo(Boolean.TRUE, type);
    Introspector.setBeanInfoSearchPath(oldPath);

    PropertyDescriptor[] pds = info.getPropertyDescriptors();
    if (pds.length != 1) {
        throw new Error("could not find custom BeanInfo for " + type);
    }
    Introspector.flushCaches();
}
 

/**
 * This is a regression test to ensure that 4168475 does not regress.
 */
private static void test4168475(Class type) {
    String[] newPath = {"infos"};
    String[] oldPath = Introspector.getBeanInfoSearchPath();

    Introspector.setBeanInfoSearchPath(newPath);
    BeanInfo info = getBeanInfo(Boolean.TRUE, type);
    Introspector.setBeanInfoSearchPath(oldPath);

    PropertyDescriptor[] pds = info.getPropertyDescriptors();
    if (pds.length != 1) {
        throw new Error("could not find custom BeanInfo for " + type);
    }
    Introspector.flushCaches();
}
 

private static void test() {
    test("Bean", "Bean2", "Bean3", "Bean4");
    test("Bean4", "Bean", "Bean2", "Bean3");
    test("Bean3", "Bean4", "Bean", "Bean2");
    test("Bean2", "Bean3", "Bean4", "Bean");
    Introspector.flushCaches();
}
 

private static void test(Boolean mark, Class... types) {
    for (Class type : types) {
        BeanInfo info = getBeanInfo(mark, type);
        if (info == null) {
            throw new Error("could not find BeanInfo for " + type);
        }
        if (mark != info.getBeanDescriptor().getValue("test")) {
            throw new Error("could not find marked BeanInfo for " + type);
        }
    }
    Introspector.flushCaches();
}
 

/**
 * Clear any cached property descriptors information for all classes
 * loaded by any class loaders.  This is useful in cases where class
 * loaders are thrown away to implement class reloading.
 */
public void clearDescriptors() {

    descriptorsCache.clear();
    mappedDescriptorsCache.clear();
    Introspector.flushCaches();

}
 

/**
 * This is a regression test to ensure that 4168475 does not regress.
 */
private static void test4168475(Class type) {
    String[] newPath = {"infos"};
    String[] oldPath = Introspector.getBeanInfoSearchPath();

    Introspector.setBeanInfoSearchPath(newPath);
    BeanInfo info = getBeanInfo(Boolean.TRUE, type);
    Introspector.setBeanInfoSearchPath(oldPath);

    PropertyDescriptor[] pds = info.getPropertyDescriptors();
    if (pds.length != 1) {
        throw new Error("could not find custom BeanInfo for " + type);
    }
    Introspector.flushCaches();
}
 

private static void test(Boolean mark, Class... types) {
    for (Class type : types) {
        BeanInfo info = getBeanInfo(mark, type);
        if (info == null) {
            throw new Error("could not find BeanInfo for " + type);
        }
        if (mark != info.getBeanDescriptor().getValue("test")) {
            throw new Error("could not find marked BeanInfo for " + type);
        }
    }
    Introspector.flushCaches();
}
 

@Override
public void contextDestroyed(ServletContextEvent event) {
	CachedIntrospectionResults.clearClassLoader(Thread.currentThread().getContextClassLoader());
	Introspector.flushCaches();
}