org.universAAL.context.reasoner.osgi
Class Activator

java.lang.Object
  org.universAAL.context.reasoner.osgi.Activator

All Implemented Interfaces:

EventListener, org.osgi.framework.BundleActivator, org.osgi.framework.ServiceListener

public class Activator
extends Object
implements org.osgi.framework.BundleActivator, org.osgi.framework.ServiceListener

Activator of the reasoner. Basically it is used to prepare the the ReasoningProvider. The reasoner is basically a manager for situations, queries and rules. A Situation is currently (need to be improved) represented by three URI's: Subject, Predicate and Object. Subject and Object can be a concrete instances or also types. The subject is mandatory but the other two are optional. A Query is either a SPARQL Construct-Query or created out of a given Context-Event and a search-string. A Rule combines a situation with a query. If a context-event is posted on the context-bus that matches the parameters given by the situation in a rule, then the according query is performed at the CHE and the resulting ContextEvent of the Construct-Query is posted at the Context-bus.

Author:

alfiva, amarinc

Field Summary

static ContextPublisher	cpublisher
static ModuleContext	mcontext
static org.osgi.framework.BundleContext	osgiContext
static CHECaller	scaller
static MessageContentSerializer	serializer

Constructor Summary

Activator()

Method Summary

void	serviceChanged(org.osgi.framework.ServiceEvent event)
void	start(org.osgi.framework.BundleContext bcontext)
void	stop(org.osgi.framework.BundleContext arg0)

Methods inherited from class java.lang.Object

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

Field Detail

osgiContext

public static org.osgi.framework.BundleContext osgiContext

mcontext

public static ModuleContext mcontext

cpublisher

public static ContextPublisher cpublisher

scaller

public static CHECaller scaller

serializer

public static MessageContentSerializer serializer

Constructor Detail

Activator

public Activator()

Method Detail

start

public void start(org.osgi.framework.BundleContext bcontext)
           throws Exception

Specified by:

start in interface org.osgi.framework.BundleActivator

Throws:

Exception

stop

public void stop(org.osgi.framework.BundleContext arg0)
          throws Exception

Specified by:

stop in interface org.osgi.framework.BundleActivator

Throws:

Exception

serviceChanged

public void serviceChanged(org.osgi.framework.ServiceEvent event)

Specified by:

serviceChanged in interface org.osgi.framework.ServiceListener