org.osgi.framework.startlevel

Interface BundleStartLevel

All Superinterfaces:

BundleReference

@ProviderType
public interface BundleStartLevel
extends BundleReference

Query and modify the start level information for a bundle. The start level object for a bundle can be obtained by calling bundle.adapt(BundleStartLevel.class) on the bundle.

The bundle associated with this BundleStartLevel object can be obtained by calling BundleReference.getBundle().

"ThreadSafe"

Method Summary

Modifier and Type	Method and Description
int	getStartLevel() Return the assigned start level value for the bundle.
boolean	isActivationPolicyUsed() Returns whether the bundle's autostart setting indicates that the activation policy declared in the bundle manifest must be used.
boolean	isPersistentlyStarted() Returns whether the bundle's autostart setting indicates it must be started.
void	setStartLevel(int startlevel) Assign a start level value to the bundle.

Methods inherited from interface org.osgi.framework.BundleReference

getBundle

Method Detail

getStartLevel

int getStartLevel()

Return the assigned start level value for the bundle.

Returns:

The start level value of the bundle.

Throws:

java.lang.IllegalStateException - If the bundle has been uninstalled.

See Also:

setStartLevel(int)

setStartLevel

void setStartLevel(int startlevel)

Assign a start level value to the bundle.

The bundle will be assigned the specified start level. The start level value assigned to the bundle will be persistently recorded by the Framework.

If the new start level for the bundle is lower than or equal to the active start level of the Framework and the bundle's autostart setting indicates this bundle must be started, the Framework will start the bundle as described in the Bundle.start(int) method using the Bundle.START_TRANSIENT option. The Bundle.START_ACTIVATION_POLICY option must also be used if isActivationPolicyUsed() returns true. The actual starting of the bundle must occur asynchronously.

If the new start level for the bundle is higher than the active start level of the Framework, the Framework will stop the bundle as described in the Bundle.stop(int) method using the Bundle.STOP_TRANSIENT option. The actual stopping of the bundle must occur asynchronously.

Parameters:

startlevel - The new start level for the bundle.

Throws:

java.lang.IllegalArgumentException - If the specified start level is less than or equal to zero, or if the bundle is the system bundle.

java.lang.IllegalStateException - If the bundle has been uninstalled.

java.lang.SecurityException - If the caller does not have AdminPermission[bundle,EXECUTE] and the Java runtime environment supports permissions.

isPersistentlyStarted

boolean isPersistentlyStarted()

Returns whether the bundle's autostart setting indicates it must be started.

The autostart setting of a bundle indicates whether the bundle is to be started when its start level is reached.

Returns:

true if the autostart setting of the bundle indicates it is to be started. false otherwise.

Throws:

java.lang.IllegalStateException - If this bundle has been uninstalled.

See Also:

Bundle.START_TRANSIENT

isActivationPolicyUsed

boolean isActivationPolicyUsed()

Returns whether the bundle's autostart setting indicates that the activation policy declared in the bundle manifest must be used.

The autostart setting of a bundle indicates whether the bundle's declared activation policy is to be used when the bundle is started.

Returns:

true if the bundle's autostart setting indicates the activation policy declared in the manifest must be used. false if the bundle must be eagerly activated.

Throws:

java.lang.IllegalStateException - If the bundle has been uninstalled.

See Also:

Bundle.START_ACTIVATION_POLICY