Knopflerfish OSGi 3.0.0

org.osgi.framework.launch
Interface Framework

All Superinterfaces:
Bundle

public interface Framework
extends Bundle

A Framework instance. A Framework is also known as a System Bundle.

Framework instances are created using a FrameworkFactory. The methods of this interface can be used to manage and control the created framework instance.

Version:
$Revision: 6542 $
ThreadSafe

Field Summary
 
Fields inherited from interface org.osgi.framework.Bundle
ACTIVE, INSTALLED, RESOLVED, SIGNERS_ALL, SIGNERS_TRUSTED, START_ACTIVATION_POLICY, START_TRANSIENT, STARTING, STOP_TRANSIENT, STOPPING, UNINSTALLED
 
Method Summary
 long getBundleId()
          Returns the Framework unique identifier.
 java.lang.String getLocation()
          Returns the Framework location identifier.
 java.lang.String getSymbolicName()
          Returns the symbolic name of this Framework.
 void init()
          Initialize this Framework.
 void start()
          Start this Framework.
 void start(int options)
          Start this Framework.
 void stop()
          Stop this Framework.
 void stop(int options)
          Stop this Framework.
 void uninstall()
          The Framework cannot be uninstalled.
 void update()
          Stop and restart this Framework.
 void update(java.io.InputStream in)
          Stop and restart this Framework.
 FrameworkEvent waitForStop(long timeout)
          Wait until this Framework has completely stopped.
 
Methods inherited from interface org.osgi.framework.Bundle
findEntries, getBundleContext, getEntry, getEntryPaths, getHeaders, getHeaders, getLastModified, getRegisteredServices, getResource, getResources, getServicesInUse, getSignerCertificates, getState, getVersion, hasPermission, loadClass
 

Method Detail

init

void init()
          throws BundleException
Initialize this Framework. After calling this method, this Framework must:

This Framework will not actually be started until start is called.

This method does nothing if called when this Framework is in the Bundle.STARTING, Bundle.ACTIVE or Bundle.STOPPING states.

Throws:
BundleException - If this Framework could not be initialized.
java.lang.SecurityException - If the Java Runtime Environment supports permissions and the caller does not have the appropriate AdminPermission[this,EXECUTE] or if there is a security manager already installed and the Constants.FRAMEWORK_SECURITY configuration property is set.

waitForStop

FrameworkEvent waitForStop(long timeout)
                           throws java.lang.InterruptedException
Wait until this Framework has completely stopped. The stop and update methods on a Framework performs an asynchronous stop of the Framework. This method can be used to wait until the asynchronous stop of this Framework has completed. This method will only wait if called when this Framework is in the Bundle.STARTING, Bundle.ACTIVE, or Bundle.STOPPING states. Otherwise it will return immediately.

A Framework Event is returned to indicate why this Framework has stopped.

Parameters:
timeout - Maximum number of milliseconds to wait until this Framework has completely stopped. A value of zero will wait indefinitely.
Returns:
A Framework Event indicating the reason this method returned. The following FrameworkEvent types may be returned by this method.
  • STOPPED - This Framework has been stopped.
  • STOPPED_UPDATE - This Framework has been updated which has shutdown and will now restart.
  • STOPPED_BOOTCLASSPATH_MODIFIED - This Framework has been stopped and a bootclasspath extension bundle has been installed or updated. The VM must be restarted in order for the changed boot class path to take affect.
  • ERROR - The Framework encountered an error while shutting down or an error has occurred which forced the framework to shutdown.
  • WAIT_TIMEDOUT - This method has timed out and returned before this Framework has stopped.
Throws:
java.lang.InterruptedException - If another thread interrupted the current thread before or while the current thread was waiting for this Framework to completely stop. The interrupted status of the current thread is cleared when this exception is thrown.
java.lang.IllegalArgumentException - If the value of timeout is negative.

start

void start()
           throws BundleException
Start this Framework.

The following steps are taken to start this Framework:

  1. If this Framework is not in the Bundle.STARTING state, initialize this Framework.
  2. All installed bundles must be started in accordance with each bundle's persistent autostart setting. This means some bundles will not be started, some will be started with eager activation and some will be started with their declared activation policy. If this Framework implements the optional Start Level Service Specification, then the start level of this Framework is moved to the start level specified by the beginning start level framework property, as described in the Start Level Service Specification. If this framework property is not specified, then the start level of this Framework is moved to start level one (1). Any exceptions that occur during bundle starting must be wrapped in a BundleException and then published as a framework event of type FrameworkEvent.ERROR
  3. This Framework's state is set to Bundle.ACTIVE.
  4. A framework event of type FrameworkEvent.STARTED is fired

Specified by:
start in interface Bundle
Throws:
BundleException - If this Framework could not be started.
java.lang.SecurityException - If the caller does not have the appropriate AdminPermission[this,EXECUTE], and the Java Runtime Environment supports permissions.
See Also:
"Start Level Service Specification"

start

void start(int options)
           throws BundleException
Start this Framework.

Calling this method is the same as calling start(). There are no start options for the Framework.

Specified by:
start in interface Bundle
Parameters:
options - Ignored. There are no start options for the Framework.
Throws:
BundleException - If this Framework could not be started.
java.lang.SecurityException - If the caller does not have the appropriate AdminPermission[this,EXECUTE], and the Java Runtime Environment supports permissions.
See Also:
start()

stop

void stop()
          throws BundleException
Stop this Framework.

The method returns immediately to the caller after initiating the following steps to be taken on another thread.

  1. This Framework's state is set to Bundle.STOPPING.
  2. All installed bundles must be stopped without changing each bundle's persistent autostart setting. If this Framework implements the optional Start Level Service Specification, then the start level of this Framework is moved to start level zero (0), as described in the Start Level Service Specification. Any exceptions that occur during bundle stopping must be wrapped in a BundleException and then published as a framework event of type FrameworkEvent.ERROR
  3. Unregister all services registered by this Framework.
  4. Event handling is disabled.
  5. This Framework's state is set to Bundle.RESOLVED.
  6. All resources held by this Framework are released. This includes threads, bundle class loaders, open files, etc.
  7. Notify all threads that are waiting at waitForStop that the stop operation has completed.

After being stopped, this Framework may be discarded, initialized or started.

Specified by:
stop in interface Bundle
Throws:
BundleException - If stopping this Framework could not be initiated.
java.lang.SecurityException - If the caller does not have the appropriate AdminPermission[this,EXECUTE], and the Java Runtime Environment supports permissions.
See Also:
"Start Level Service Specification"

stop

void stop(int options)
          throws BundleException
Stop this Framework.

Calling this method is the same as calling stop(). There are no stop options for the Framework.

Specified by:
stop in interface Bundle
Parameters:
options - Ignored. There are no stop options for the Framework.
Throws:
BundleException - If stopping this Framework could not be initiated.
java.lang.SecurityException - If the caller does not have the appropriate AdminPermission[this,EXECUTE], and the Java Runtime Environment supports permissions.
See Also:
stop()

uninstall

void uninstall()
               throws BundleException
The Framework cannot be uninstalled.

This method always throws a BundleException.

Specified by:
uninstall in interface Bundle
Throws:
BundleException - This Framework cannot be uninstalled.
java.lang.SecurityException - If the caller does not have the appropriate AdminPermission[this,LIFECYCLE], and the Java Runtime Environment supports permissions.
See Also:
Bundle.stop()

update

void update()
            throws BundleException
Stop and restart this Framework.

The method returns immediately to the caller after initiating the following steps to be taken on another thread.

  1. Perform the steps in the stop() method to stop this Framework.
  2. Perform the steps in the start() method to start this Framework.

Specified by:
update in interface Bundle
Throws:
BundleException - If stopping and restarting this Framework could not be initiated.
java.lang.SecurityException - If the caller does not have the appropriate AdminPermission[this,LIFECYCLE], and the Java Runtime Environment supports permissions.
See Also:
Bundle.update(InputStream)

update

void update(java.io.InputStream in)
            throws BundleException
Stop and restart this Framework.

Calling this method is the same as calling update() except that any provided InputStream is immediately closed.

Specified by:
update in interface Bundle
Parameters:
in - Any provided InputStream is immediately closed before returning from this method and otherwise ignored.
Throws:
BundleException - If stopping and restarting this Framework could not be initiated.
java.lang.SecurityException - If the caller does not have the appropriate AdminPermission[this,LIFECYCLE], and the Java Runtime Environment supports permissions.
See Also:
Bundle.stop(), Bundle.start()

getBundleId

long getBundleId()
Returns the Framework unique identifier. This Framework is assigned the unique identifier zero (0) since this Framework is also a System Bundle.

Specified by:
getBundleId in interface Bundle
Returns:
0.
See Also:
Bundle.getBundleId()

getLocation

java.lang.String getLocation()
Returns the Framework location identifier. This Framework is assigned the unique location "System Bundle" since this Framework is also a System Bundle.

Specified by:
getLocation in interface Bundle
Returns:
The string "System Bundle".
Throws:
java.lang.SecurityException - If the caller does not have the appropriate AdminPermission[this,METADATA], and the Java Runtime Environment supports permissions.
See Also:
Bundle.getLocation(), Constants.SYSTEM_BUNDLE_LOCATION

getSymbolicName

java.lang.String getSymbolicName()
Returns the symbolic name of this Framework. The symbolic name is unique for the implementation of the framework. However, the symbolic name "system.bundle" must be recognized as an alias to the implementation-defined symbolic name since this Framework is also a System Bundle.

Specified by:
getSymbolicName in interface Bundle
Returns:
The symbolic name of this Framework.
See Also:
Bundle.getSymbolicName(), Constants.SYSTEM_BUNDLE_SYMBOLICNAME

Knopflerfish OSGi 3.0.0