Examples of org.osgi.service.remoteserviceadmin.EndpointListener

Package org.osgi.service.remoteserviceadmin

Examples of org.osgi.service.remoteserviceadmin.EndpointListener

org.osgi.service.remoteserviceadmin.EndpointListener
A white board service that represents a listener for endpoints. An Endpoint Listener represents a participant in the distributed model that is interested in Endpoint Descriptions. This white board service can be used in many different scenarios. However, the primary use case is to allow a remote manager to be informed of Endpoint Descriptions available in the network and inform the network about available Endpoint Descriptions. Both the network bundle and the manager bundle register an Endpoint Listener service. The manager informs the network bundle about Endpoints that it creates. The network bundles then uses a protocol like SLP to announce these local end-points to the network. If the network bundle discovers a new Endpoint through its discovery protocol, then it sends an Endpoint Description to all the Endpoint Listener services that are registered (except its own) that have specified an interest in that endpoint. Endpoint Listener services can express their scope with the service property {@link #ENDPOINT_LISTENER_SCOPE}. This service property is a list of filters. An Endpoint Description should only be given to a Endpoint Listener when there is at least one filter that matches the Endpoint Description properties. This filter model is quite flexible. For example, a discovery bundle is only interested in locally originating Endpoint Descriptions. The following filter ensure that it only sees local endpoints.
```
 (org.osgi.framework.uuid=72dc5fd9-5f8f-4f8f-9821-9ebb433a5b72) 
```
In the same vein, a manager that is only interested in remote Endpoint Descriptions can use a filter like:
```
 (!(org.osgi.framework.uuid=72dc5fd9-5f8f-4f8f-9821-9ebb433a5b72)) 
```
Where in both cases, the given UUID is the UUID of the local framework that can be found in the Framework properties. The Endpoint Listener's scope maps very well to the service hooks. A manager can just register all filters found from the Listener Hook as its scope. This will automatically provide it with all known endpoints that match the given scope, without having to inspect the filter string. In general, when an Endpoint Description is discovered, it should be dispatched to all registered Endpoint Listener services. If a new Endpoint Listener is registered, it should be informed about all currently known Endpoints that match its scope. If a getter of the Endpoint Listener service is unregistered, then all its registered Endpoint Description objects must be removed. The Endpoint Listener models a best effort approach. Participating bundles should do their utmost to keep the listeners up to date, but implementers should realize that many endpoints come through unreliable discovery processes. @ThreadSafe @author $Id: 2749054493a841c445c5b0006a0d002fa48bf3a1 $

        
        Bundle topMgrBundle = c.createMock(Bundle.class);
        
        RemoteServiceAdmin rsa = c.createMock(RemoteServiceAdmin.class);
        final ServiceReference rsaSref = c.createMock(ServiceReference.class);
        EndpointListener epl = c.createMock(EndpointListener.class);
        final ServiceReference eplSref = c.createMock(ServiceReference.class);
        EasyMock.expect(eplSref.getProperty(EasyMock.same(EndpointListener.ENDPOINT_LISTENER_SCOPE)))
            .andReturn(scope).anyTimes();
        EasyMock.expect(eplSref.getBundle()).andReturn(topMgrBundle).anyTimes();


        final ServiceReference sref = c.createMock(ServiceReference.class);
        EasyMock.expect(sref.getProperty(EasyMock.same(RemoteConstants.SERVICE_EXPORTED_INTERFACES)))
            .andReturn("*").anyTimes();
        Bundle srefBundle = c.createMock(Bundle.class);
        EasyMock.expect(sref.getBundle()).andReturn(srefBundle).anyTimes();
        
        
        EndpointDescription endpoint = c.createMock(EndpointDescription.class);
        {
            Map props = new HashMap();
            String[] objs = new String[1];
            objs[0] = "abc";
            props.put("objectClass", objs);
            EasyMock.expect(endpoint.getProperties()).andReturn(props).anyTimes();
        }


        ExportRegistration exportRegistration = c.createMock(ExportRegistration.class);
        ExportReference exportReference = c.createMock(ExportReference.class);


        EasyMock.expect(exportRegistration.getExportReference()).andReturn(exportReference).anyTimes();
        EasyMock.expect(exportReference.getExportedEndpoint()).andReturn(endpoint).anyTimes();
        {
            List ret = new ArrayList();
            ret.add(exportRegistration);
            EasyMock.expect(rsa.exportService(EasyMock.same(sref), (Map)EasyMock.anyObject())).andReturn(ret)
                .once();
        }


        epl.endpointAdded((EndpointDescription)EasyMock.anyObject(), (String)EasyMock.anyObject());
        EasyMock.expectLastCall().andAnswer(new IAnswer<Object>() {


            public Object answer() throws Throwable {
                System.out.println("Call made !!!");
                sema.release();

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        BundleContext bc = c.createMock(BundleContext.class);
        ServiceReference sref = c.createMock(ServiceReference.class);
        ExportRegistration exReg = c.createMock(ExportRegistration.class);
        ExportRegistration exReg2 = c.createMock(ExportRegistration.class);
        EndpointListener epl = EasyMock.createMock(EndpointListener.class);
        EndpointDescription epd = c.createMock(EndpointDescription.class);
        EndpointDescription epd2 = c.createMock(EndpointDescription.class);
        ExportReference exRef = c.createMock(ExportReference.class);
        ExportReference exRef2 = c.createMock(ExportReference.class);
        
        
        Map props = new HashMap();
        String[] oc = new String[1];
        oc[0] = "myClass";
        props.put("objectClass", oc);
        
        Map props2 = new HashMap();
        oc = new String[1];
        oc[0] = "notMyClass";
        props2.put("objectClass", oc);
        
        
        EasyMock.expect(bc.getService(EasyMock.eq(sref))).andReturn(epl).anyTimes();
        EasyMock.expect(bc.createFilter((String)EasyMock.anyObject())).andAnswer(new IAnswer<Filter>() {
            public Filter answer() throws Throwable {
                return FrameworkUtil.createFilter((String)EasyMock.getCurrentArguments()[0]);
            }
        }).anyTimes();
        EasyMock.expect(sref.getProperty(EasyMock.eq(EndpointListener.ENDPOINT_LISTENER_SCOPE)))
            .andReturn("(objectClass=myClass)").anyTimes();


        
        EasyMock.expect(exReg.getExportReference()).andReturn(exRef).anyTimes();
        EasyMock.expect(exRef.getExportedEndpoint()).andReturn(epd).anyTimes();
        EasyMock.expect(epd.getProperties()).andReturn(props).anyTimes();
        
        EasyMock.expect(exReg2.getExportReference()).andReturn(exRef2).anyTimes();
        EasyMock.expect(exRef2.getExportedEndpoint()).andReturn(epd2).anyTimes();
        EasyMock.expect(epd2.getProperties()).andReturn(props2).anyTimes();
        
        // must only be called for the first EndpointDestription ! 
        epl.endpointRemoved(EasyMock.eq(epd), EasyMock.eq("(objectClass=myClass)"));
        EasyMock.expectLastCall().once();
        
        c.replay();
        EasyMock.replay(epl);

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        }
    }


    void registerTracker(ServiceReference reference, Object svc) {
        if (svc instanceof EndpointListener) {
            EndpointListener listener = (EndpointListener) svc;
            Collection<String> filters = addListener(reference, listener);
            triggerCallbacks(filters, listener);
        }
    }

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        }
    }


    void clearTracker(Object svc) {
        if (svc instanceof EndpointListener) {
            EndpointListener listener = (EndpointListener) svc;
            removeListener(listener);
            // If the tracker was removed or the scope was changed this doesn't require 
            // additional callbacks on the tracker. Its the responsibility of the tracker
            // itself to clean up any orphans. See Remote Service Admin spec 122.6.3
        }

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                return props.get(EasyMock.getCurrentArguments()[0]);
            }
        }).anyTimes();                
        EasyMock.replay(sr);


        EndpointListener el = EasyMock.createMock(EndpointListener.class);
        el.endpointAdded((EndpointDescription) EasyMock.anyObject(), EasyMock.eq("(objectClass=*)"));
        EasyMock.expectLastCall();
        EasyMock.replay(el);
        ld.registerTracker(sr, el);
        
        // Start the bundle
        BundleEvent be = new BundleEvent(BundleEvent.STARTED, bundle);
        ld.bundleChanged(be);
        assertEquals(1, ld.endpointDescriptions.size());
        EndpointDescription ed = ld.endpointDescriptions.keySet().iterator().next();
        assertEquals("http://somewhere:12345", ed.getId());
        assertSame(bundle, ld.endpointDescriptions.get(ed));
        
        EasyMock.verify(el);


        // Stop the bundle
        EasyMock.reset(el);
        el.endpointRemoved((EndpointDescription) EasyMock.anyObject(), EasyMock.eq("(objectClass=*)"));
        EasyMock.expectLastCall();
        EasyMock.replay(el);
        
        BundleEvent be1 = new BundleEvent(BundleEvent.STOPPED, bundle);
        ld.bundleChanged(be1);

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        }).anyTimes();
                
        EasyMock.replay(sr);
        
        EasyMock.reset(ld.bundleContext);
        EndpointListener el = EasyMock.createMock(EndpointListener.class);
        EasyMock.expect(ld.bundleContext.getService(sr)).andReturn(el);
        EasyMock.expect(ld.bundleContext.ungetService(sr)).andReturn(true);
        EasyMock.expect(ld.bundleContext.createFilter((String) EasyMock.anyObject())).andAnswer(new IAnswer<Filter>() {
            public Filter answer() throws Throwable {
                return FrameworkUtil.createFilter((String) EasyMock.getCurrentArguments()[0]);
            }
        }).anyTimes();
        EasyMock.replay(ld.bundleContext);
        
        el.endpointAdded((EndpointDescription) EasyMock.anyObject(), 
                EasyMock.eq("(objectClass=org.example.ClassA)"));
        EasyMock.expectLastCall();
        EasyMock.replay(el);
        
        // Add the EndpointListener Service
        assertEquals("Precondition failed", 0, ld.listenerToFilters.size());
        assertEquals("Precondition failed", 0, ld.filterToListeners.size());        
        assertSame(el, ld.listenerTracker.addingService(sr));
        
        assertEquals(1, ld.listenerToFilters.size());
        assertEquals(Collections.singletonList("(objectClass=org.example.ClassA)"), ld.listenerToFilters.get(el));
        assertEquals(1, ld.filterToListeners.size()); 
        assertEquals(Collections.singletonList(el), ld.filterToListeners.get("(objectClass=org.example.ClassA)"));


        EasyMock.verify(el);
        
        // Modify the EndpointListener Service
        // no need to reset the mock for this...
        props.put(EndpointListener.ENDPOINT_LISTENER_SCOPE, "(|(objectClass=org.example.ClassA)(objectClass=org.example.ClassB))");
        
        EasyMock.reset(el);
        final Set<String> actualEndpoints = new HashSet<String>();
        el.endpointAdded((EndpointDescription) EasyMock.anyObject(), 
                EasyMock.eq("(|(objectClass=org.example.ClassA)(objectClass=org.example.ClassB))"));
        EasyMock.expectLastCall().andAnswer(new IAnswer<Object>() {
            public Object answer() throws Throwable {
                EndpointDescription ed = (EndpointDescription) EasyMock.getCurrentArguments()[0];
                actualEndpoints.addAll(ed.getInterfaces());

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                return props.get(EasyMock.getCurrentArguments()[0]);
            }
        }).anyTimes();                
        EasyMock.replay(sr);


        EndpointListener el = EasyMock.createMock(EndpointListener.class);
        EasyMock.replay(el);
        
        assertEquals("Precondition failed", 0, ld.listenerToFilters.size());
        assertEquals("Precondition failed", 0, ld.filterToListeners.size());
        ld.registerTracker(sr, el);
        
        assertEquals(1, ld.listenerToFilters.size());
        assertEquals(Collections.singletonList("(objectClass=Aaaa)"), ld.listenerToFilters.get(el));
        assertEquals(1, ld.filterToListeners.size());
        assertEquals(Collections.singletonList(el), ld.filterToListeners.get("(objectClass=Aaaa)"));
        
        // Add another one with the same scope filter
        ServiceReference sr2 = EasyMock.createMock(ServiceReference.class);
        EasyMock.expect(sr2.getPropertyKeys()).andReturn(props.keySet().toArray(new String [] {})).anyTimes();
        EasyMock.expect(sr2.getProperty((String) EasyMock.anyObject())).andAnswer(new IAnswer<Object>() {
            public Object answer() throws Throwable {
                return props.get(EasyMock.getCurrentArguments()[0]);
            }
        }).anyTimes();                
        EasyMock.replay(sr2);


        EndpointListener el2 = EasyMock.createMock(EndpointListener.class);
        EasyMock.replay(el2);
        ld.registerTracker(sr2, el2);


        assertEquals(2, ld.listenerToFilters.size());
        assertEquals(Collections.singletonList("(objectClass=Aaaa)"), ld.listenerToFilters.get(el));
        assertEquals(Collections.singletonList("(objectClass=Aaaa)"), ld.listenerToFilters.get(el2));
        
        assertEquals(1, ld.filterToListeners.size());
        assertEquals(Arrays.asList(el, el2), ld.filterToListeners.get("(objectClass=Aaaa)"));
        
        // Add another listener with a multi-value scope
        final Hashtable<String, Object> props2 = new Hashtable<String, Object>();
        props2.put(EndpointListener.ENDPOINT_LISTENER_SCOPE, Arrays.asList("(objectClass=X)","(objectClass=Y)"));
        ServiceReference sr3 = EasyMock.createMock(ServiceReference.class);
        EasyMock.expect(sr3.getPropertyKeys()).andReturn(props2.keySet().toArray(new String [] {})).anyTimes();
        EasyMock.expect(sr3.getProperty((String) EasyMock.anyObject())).andAnswer(new IAnswer<Object>() {
            public Object answer() throws Throwable {
                return props2.get(EasyMock.getCurrentArguments()[0]);
            }
        }).anyTimes();                
        EasyMock.replay(sr3);


        EndpointListener el3 = EasyMock.createMock(EndpointListener.class);
        EasyMock.replay(el3);
        ld.registerTracker(sr3, el3);


        assertEquals(3, ld.listenerToFilters.size());
        assertEquals(Collections.singletonList("(objectClass=Aaaa)"), ld.listenerToFilters.get(el));

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    }
    
    public void testClearTracker() throws Exception {
        LocalDiscovery ld = getLocalDiscovery();
        
        EndpointListener el = EasyMock.createMock(EndpointListener.class);
        ld.listenerToFilters.put(el, new ArrayList<String>(Arrays.asList("(a=b)", "(objectClass=foo.bar.Bheuaark)")));
        ld.filterToListeners.put("(a=b)", new ArrayList<EndpointListener>(Arrays.asList(el)));
        ld.filterToListeners.put("(objectClass=foo.bar.Bheuaark)", new ArrayList<EndpointListener>(Arrays.asList(el)));
                        
        ld.clearTracker("foobar"); // should not barf

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        // LOG
        // .info("TopologyManager: notifyListenerOfAddingIfAppropriate() called for own listener -> skipping ");
        // return;
        // }


        EndpointListener epl = (EndpointListener)bctx.getService(sref);


        LOG.info("TopologyManager: notifyListenerOfAddingIfAppropriate() ");


        try {


            List<Filter> filters = Utils.normalizeScope(sref, bctx);


            for (ExportRegistration exReg : exportRegistrations) {


                // FIXME!!!!!!!!!!!!! There needs to be a better way ?!?!?!
                Map props = exReg.getExportReference().getExportedEndpoint().getProperties();
                Dictionary d = new Hashtable(props);


                for (Filter filter : filters) {
                    LOG.info("Matching: " + filter + "  against " + d);
                }


                for (Filter filter : filters) {
                    if (filter.match(d)) {
                        LOG.info("Listener mached one of the Endpoints !!!!: " + epl);


                        epl
                            .endpointAdded(exReg.getExportReference().getExportedEndpoint(), filter
                                .toString());
                    }
                }
            }

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    }


    protected void notifyListenersOfRemovalIfAppropriate(ServiceReference sref,
                                                         Collection<ExportRegistration> exportRegistrations) {


        EndpointListener epl = (EndpointListener)bctx.getService(sref);


        LOG.info("TopologyManager: notifyListenerOfREMOVALIfAppropriate() ");


        List<Filter> filters;
        try {
            filters = Utils.normalizeScope(sref, bctx);


            for (ExportRegistration exReg : exportRegistrations) {


                // FIXME!!!!!!!!!!!!! There needs to be a better way ?!?!?!
                Map props = exReg.getExportReference().getExportedEndpoint().getProperties();
                Dictionary d = new Hashtable(props);


                for (Filter filter : filters) {
                    LOG.info("Matching: " + filter + "  against " + d);
                }


                for (Filter filter : filters) {
                    if (filter.match(d)) {
                        LOG.info("Listener matched one of the Endpoints !!!! --> calling removed() ...");


                        epl.endpointRemoved(exReg.getExportReference().getExportedEndpoint(), filter
                            .toString());
                    }
                }
            }
        } catch (InvalidSyntaxException e) {

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Related Classes of org.osgi.service.remoteserviceadmin.EndpointListener

org.apache.cxf.dosgi.discovery.local.internal.LocalDiscovery

org.apache.cxf.dosgi.discovery.local.internal.LocalDiscoveryTest

org.apache.cxf.dosgi.discovery.zookeeper.InterfaceDataMonitorListenerImpl

org.apache.cxf.dosgi.topologymanager.ExportServiceTest

org.apache.cxf.dosgi.topologymanager.TopologyManager

org.apache.cxf.dosgi.topologymanager.TopologyManagerTest

org.apache.tuscany.sca.osgi.service.discovery.impl.AbstractDiscoveryService

org.eclipse.ecf.osgi.services.remoteserviceadmin.EndpointDescriptionLocator

org.eclipse.ecf.tests.osgi.services.remoteserviceadmin.EndpointListenerTest

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