org.glassfish.tyrus.core

Class OsgiRegistry

java.lang.Object

org.glassfish.tyrus.core.OsgiRegistry

All Implemented Interfaces:

java.util.EventListener, org.osgi.framework.BundleListener, org.osgi.framework.SynchronousBundleListener

public final class OsgiRegistry
extends java.lang.Object
implements org.osgi.framework.SynchronousBundleListener

Taken from Jersey 2. Utility class to deal with OSGi runtime specific behavior. This is mainly to handle META-INF/services lookup and generic/application class lookup issue in OSGi.

When OSGi runtime is detected by the ServiceFinder class, an instance of OsgiRegistry is created and associated with given OSGi BundleContext. META-INF/services entries are then being accessed via the OSGi Bundle API as direct ClassLoader#getResource() method invocation does not work in this case within OSGi.

Author:

Jakub Podlesak

Method Summary

Modifier and Type	Method and Description
void	bundleChanged(org.osgi.framework.BundleEvent event)
java.lang.Class<?>	classForNameWithException(java.lang.String className) Get the Class from the class name.
static OsgiRegistry	getInstance() Returns an OsgiRegistry instance.
java.util.Enumeration<java.net.URL>	getPackageResources(java.lang.String packagePath, java.lang.ClassLoader classLoader)
java.util.ResourceBundle	getResourceBundle(java.lang.String bundleName) Tries to load resource bundle via OSGi means.
void	hookUp() Will hook up this instance with the OSGi runtime.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static OsgiRegistry getInstance()

Returns an OsgiRegistry instance. Call this method only if sure that the application is running in OSGi environment, otherwise a call to this method can lead to an ClassNotFoundException.

Returns:

an OsgiRegistry instance.

bundleChanged

public void bundleChanged(org.osgi.framework.BundleEvent event)

Specified by:

bundleChanged in interface org.osgi.framework.BundleListener

getPackageResources

public java.util.Enumeration<java.net.URL> getPackageResources(java.lang.String packagePath,
                                                               java.lang.ClassLoader classLoader)

classForNameWithException

public java.lang.Class<?> classForNameWithException(java.lang.String className)
                                             throws java.lang.ClassNotFoundException

Get the Class from the class name.

The context class loader will be utilized if accessible and non-null. Otherwise the defining class loader of this class will be utilized.

Parameters:

className - the class name.

Returns:

the Class, otherwise null if the class cannot be found.

Throws:

java.lang.ClassNotFoundException - if the class cannot be found.

getResourceBundle

public java.util.ResourceBundle getResourceBundle(java.lang.String bundleName)

Tries to load resource bundle via OSGi means. No caching involved here, as localization properties are being cached in Localizer class already.

Parameters:

bundleName - name of the resource bundle to load

Returns:

resource bundle instance if found, null otherwise

hookUp

public void hookUp()

Will hook up this instance with the OSGi runtime. This is to actually update SPI provider lookup and class loading mechanisms in Jersey to utilize OSGi features.