ClassLoaderBase (Apache HBase 1.4.11 API)

java.lang.Object
- java.lang.ClassLoader
- - java.security.SecureClassLoader
  - - java.net.URLClassLoader
    - - org.apache.hadoop.hbase.util.ClassLoaderBase

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

CoprocessorClassLoader, DynamicClassLoader
```
@InterfaceAudience.Private
public class ClassLoaderBase
extends URLClassLoader
```
Base class loader that defines couple shared constants used by sub-classes. It also defined method getClassLoadingLock for parallel class loading and JDK 1.6 support. This method (getClassLoadingLock) is similar to the same method in the base class Java ClassLoader introduced in JDK 1.7, but not in JDK 1.6.

- Field Summary
  
  Fields
  Modifier and Type Field and Description
  
  protected static String DEFAULT_LOCAL_DIR
  
  protected static String LOCAL_DIR_KEY
  
  protected ClassLoader parent
  Parent class loader.
- Constructor Summary
  
  Constructors
  Constructor and Description
  
  ClassLoaderBase(ClassLoader parent)
  Creates a DynamicClassLoader that can load classes dynamically from jar files under a specific folder.
- Method Summary
  
  Methods
  Modifier and Type Method and Description
  
  protected Object getClassLoadingLock(String className)
  Returns the lock object for class loading operations.
  - Methods inherited from class java.net.URLClassLoader
    addURL, close, definePackage, findClass, findResource, findResources, getPermissions, getResourceAsStream, getURLs, newInstance, newInstance
  - Methods inherited from class java.security.SecureClassLoader
    defineClass, defineClass
  - Methods inherited from class java.lang.ClassLoader
    clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResource, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, loadClass, registerAsParallelCapable, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Fields
Modifier and Type	Field and Description
`protected static String`	`DEFAULT_LOCAL_DIR`
`protected static String`	`LOCAL_DIR_KEY`
`protected ClassLoader`	`parent` Parent class loader.

Constructors
Constructor and Description
`ClassLoaderBase(ClassLoader parent)` Creates a DynamicClassLoader that can load classes dynamically from jar files under a specific folder.

Methods
Modifier and Type	Method and Description
`protected Object`	`getClassLoadingLock(String className)` Returns the lock object for class loading operations.

- Field Detail
  - DEFAULT_LOCAL_DIR
```
protected static final String DEFAULT_LOCAL_DIR
```
    See Also:
    Constant Field Values
  - LOCAL_DIR_KEY
```
protected static final String LOCAL_DIR_KEY
```
    See Also:
    Constant Field Values
  - parent
```
protected final ClassLoader parent
```
    Parent class loader.
- Constructor Detail
  - ClassLoaderBase
```
public ClassLoaderBase(ClassLoader parent)
```
    Creates a DynamicClassLoader that can load classes dynamically from jar files under a specific folder.
    
    Parameters:
    parent - the parent ClassLoader to set.
- Method Detail
  - getClassLoadingLock
```
protected Object getClassLoadingLock(String className)
```
    Returns the lock object for class loading operations.
    
    Overrides:
    
    getClassLoadingLock in class ClassLoader

Class ClassLoaderBase

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.net.URLClassLoader

Methods inherited from class java.security.SecureClassLoader

Methods inherited from class java.lang.ClassLoader

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_LOCAL_DIR

LOCAL_DIR_KEY

parent

Constructor Detail

ClassLoaderBase

Method Detail

getClassLoadingLock