Java Handler類代碼示例

import org.springframework.boot.loader.jar.Handler; //導入依賴的package包/類
@Override
protected Class<?> loadClass(String name, boolean resolve)
		throws ClassNotFoundException {
	Handler.setUseFastConnectionExceptions(true);
	try {
		try {
			definePackageIfNecessary(name);
		}
		catch (IllegalArgumentException ex) {
			// Tolerate race condition due to being parallel capable
			if (getPackage(name) == null) {
				// This should never happen as the IllegalArgumentException indicates
				// that the package has already been defined and, therefore,
				// getPackage(name) should not return null.
				throw new AssertionError("Package " + name + " has already been "
						+ "defined but it could not be found");
			}
		}
		return super.loadClass(name, resolve);
	}
	finally {
		Handler.setUseFastConnectionExceptions(false);
	}
}
 

import org.springframework.boot.loader.jar.Handler; //導入依賴的package包/類
/**
 * Attempt to load classes from the URLs before delegating to the parent loader.
 */
@Override
protected Class<?> loadClass(String name, boolean resolve)
		throws ClassNotFoundException {
	synchronized (LaunchedURLClassLoader.LOCK_PROVIDER.getLock(this, name)) {
		Class<?> loadedClass = findLoadedClass(name);
		if (loadedClass == null) {
			Handler.setUseFastConnectionExceptions(true);
			try {
				loadedClass = doLoadClass(name);
			}
			finally {
				Handler.setUseFastConnectionExceptions(false);
			}
		}
		if (resolve) {
			resolveClass(loadedClass);
		}
		return loadedClass;
	}
}
 

import org.springframework.boot.loader.jar.Handler; //導入依賴的package包/類
@Override
public URL findResource(String name) {
	Handler.setUseFastConnectionExceptions(true);
	try {
		return super.findResource(name);
	}
	finally {
		Handler.setUseFastConnectionExceptions(false);
	}
}
 

import org.springframework.boot.loader.jar.Handler; //導入依賴的package包/類
@Override
public Enumeration<URL> findResources(String name) throws IOException {
	Handler.setUseFastConnectionExceptions(true);
	try {
		return super.findResources(name);
	}
	finally {
		Handler.setUseFastConnectionExceptions(false);
	}
}
 

import org.springframework.boot.loader.jar.Handler; //導入依賴的package包/類
@Override
public boolean hasMoreElements() {
	try {
		Handler.setUseFastConnectionExceptions(true);
		return this.rootResources.hasMoreElements()
				|| this.localResources.hasMoreElements();
	}
	finally {
		Handler.setUseFastConnectionExceptions(false);
	}
}