org.apache.hadoop.util

クラス ApplicationClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.apache.hadoop.util.ApplicationClassLoader

すべての実装されたインタフェース:

Closeable, AutoCloseable

直系の既知のサブクラス:

ApplicationClassLoader

@InterfaceAudience.Public
 @InterfaceStability.Unstable
public class ApplicationClassLoader
extends URLClassLoader

A URLClassLoader for application isolation. Classes from the application JARs are loaded in preference to the parent loader.

フィールドのサマリー

フィールド

修飾子とタイプ	フィールドと説明
static String	SYSTEM_CLASSES_DEFAULT Default value of the system classes if the user did not override them.

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
ApplicationClassLoader(String classpath, ClassLoader parent, List<String> systemClasses)
ApplicationClassLoader(URL[] urls, ClassLoader parent, List<String> systemClasses)

メソッドのサマリー

修飾子とタイプ	メソッドと説明
URL	getResource(String name)
static boolean	isSystemClass(String name, List<String> systemClasses) Checks if a class should be included as a system class.
Class<?>	loadClass(String name)
protected Class<?>	loadClass(String name, boolean resolve)

クラスから継承されたメソッド java.net.URLClassLoader

addURL, close, definePackage, findClass, findResource, findResources, getPermissions, getResourceAsStream, getURLs, newInstance, newInstance

クラスから継承されたメソッド java.security.SecureClassLoader

defineClass, defineClass

クラスから継承されたメソッド java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getClassLoadingLock, getPackage, getPackages, getParent, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, registerAsParallelCapable, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

クラスから継承されたメソッド java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

フィールドの詳細

SYSTEM_CLASSES_DEFAULT

public static final String SYSTEM_CLASSES_DEFAULT

Default value of the system classes if the user did not override them. JDK classes, hadoop classes and resources, and some select third-party classes are considered system classes, and are not loaded by the application classloader.

コンストラクタの詳細

ApplicationClassLoader

public ApplicationClassLoader(URL[] urls,
                              ClassLoader parent,
                              List<String> systemClasses)

ApplicationClassLoader

public ApplicationClassLoader(String classpath,
                              ClassLoader parent,
                              List<String> systemClasses)
                       throws MalformedURLException

例外:

MalformedURLException

メソッドの詳細

getResource

public URL getResource(String name)

オーバーライド:

getResource クラス内 ClassLoader

loadClass

public Class<?> loadClass(String name)
                   throws ClassNotFoundException

オーバーライド:

loadClass クラス内 ClassLoader

例外:

ClassNotFoundException

loadClass

protected Class<?> loadClass(String name,
                             boolean resolve)
                      throws ClassNotFoundException

オーバーライド:

loadClass クラス内 ClassLoader

例外:

ClassNotFoundException

isSystemClass

public static boolean isSystemClass(String name,
                                    List<String> systemClasses)

Checks if a class should be included as a system class. A class is a system class if and only if it matches one of the positive patterns and none of the negative ones.

パラメータ:

name - the class name to check

systemClasses - a list of system class configurations.

戻り値:

true if the class is a system class