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org.quartz.simpl Class CascadingClassLoadHelper
java.lang.Object org.quartz.simpl.CascadingClassLoadHelper
- All Implemented Interfaces:
- org.quartz.spi.ClassLoadHelper
public class CascadingClassLoadHelper
- extends Object
- implements org.quartz.spi.ClassLoadHelper
A ClassLoadHelper
uses all of the ClassLoadHelper
types that are found in this package in its attempts to load a class, when
one scheme is found to work, it is promoted to the scheme that will be used
first the next time a class is loaded (in order to improve performance).
This approach is used because of the wide variance in class loader behavior between the various environments in which Quartz runs (e.g. disparate application servers, stand-alone, mobile devices, etc.). Because of this disparity, Quartz ran into difficulty with a one class-load style fits-all design. Thus, this class loader finds the approach that works, then 'remembers' it.
- Author:
- jhouse, pl47ypus
- See Also:
ClassLoadHelper
,LoadingLoaderClassLoadHelper
,SimpleClassLoadHelper
,ThreadContextClassLoadHelper
,InitThreadContextClassLoadHelper
Constructor Summary | |
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CascadingClassLoadHelper()
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Method Summary | |
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ClassLoader |
getClassLoader()
Enable sharing of the "best" class-loader with 3rd party. |
URL |
getResource(String name)
Finds a resource with a given name. |
InputStream |
getResourceAsStream(String name)
Finds a resource with a given name. |
void |
initialize()
Called to give the ClassLoadHelper a chance to initialize itself, including the opportunity to "steal" the class loader off of the calling thread, which is the thread that is initializing Quartz. |
Class |
loadClass(String name)
Return the class with the given name. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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CascadingClassLoadHelper
public CascadingClassLoadHelper()
Method Detail |
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initialize
public void initialize()
- Called to give the ClassLoadHelper a chance to initialize itself,
including the opportunity to "steal" the class loader off of the calling
thread, which is the thread that is initializing Quartz.
- Specified by:
initialize
in interfaceorg.quartz.spi.ClassLoadHelper
loadClass
public Class loadClass(String name) throws ClassNotFoundException
- Return the class with the given name.
- Specified by:
loadClass
in interfaceorg.quartz.spi.ClassLoadHelper
- Throws:
ClassNotFoundException
getResource
public URL getResource(String name)
- Finds a resource with a given name. This method returns null if no
resource with this name is found.
- Specified by:
getResource
in interfaceorg.quartz.spi.ClassLoadHelper
- Parameters:
name
- name of the desired resource- Returns:
- a java.net.URL object
getResourceAsStream
public InputStream getResourceAsStream(String name)
- Finds a resource with a given name. This method returns null if no
resource with this name is found.
- Specified by:
getResourceAsStream
in interfaceorg.quartz.spi.ClassLoadHelper
- Parameters:
name
- name of the desired resource- Returns:
- a java.io.InputStream object
getClassLoader
public ClassLoader getClassLoader()
- Enable sharing of the "best" class-loader with 3rd party.
- Specified by:
getClassLoader
in interfaceorg.quartz.spi.ClassLoadHelper
- Returns:
- the class-loader user be the helper.
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