Examples of org.osgi.framework.BundleContext.addServiceListener()

org.osgi.framework.BundleContext.addServiceListener()
Adds the specified {@code ServiceListener} object with the specified{@code filter} to the context bundle's list of listeners. See{@link Filter} for a description of the filter syntax.{@code ServiceListener} objects are notified when a service has alifecycle state change.
If the context bundle's list of listeners already contains a listener {@code l} such that {@code (l==listener)}, then this method replaces that listener's filter (which may be {@code null}) with the specified one (which may be {@code null}).
The listener is called if the filter criteria is met. To filter based upon the class of the service, the filter should reference the {@link Constants#OBJECTCLASS} property. If {@code filter} is {@code null}, all services are considered to match the filter.
When using a {@code filter}, it is possible that the {@code ServiceEvent}s for the complete lifecycle of a service will not be delivered to the listener. For example, if the {@code filter} only matches when theproperty {@code x} has the value {@code 1}, the listener will not be called if the service is registered with the property {@code x} not setto the value {@code 1}. Subsequently, when the service is modified setting property {@code x} to the value {@code 1}, the filter will match and the listener will be called with a {@code ServiceEvent} of type{@code MODIFIED}. Thus, the listener will not be called with a {@code ServiceEvent} of type {@code REGISTERED}.
If the Java Runtime Environment supports permissions, the {@code ServiceListener} object will be notified of a service event onlyif the bundle that is registering it has the {@code ServicePermission} toget the service using at least one of the named classes the service was registered under. @param listener The {@code ServiceListener} object to be added. @param filter The filter criteria. @throws InvalidSyntaxException If {@code filter} contains an invalidfilter string that cannot be parsed. @throws IllegalStateException If this BundleContext is no longer valid. @see ServiceEvent @see ServiceListener @see ServicePermission

        EasyMock.expect(systemBundle.getHeaders()).andReturn(new Hashtable());
        EasyMock.expect(systemBundle.getRegisteredServices()).andReturn(null);
        EasyMock.expect(new Long(systemBundle.getBundleId())).andReturn(new Long(0)).anyTimes();
        EasyMock.expect(systemBundle.getBundleContext()).andReturn(bundleContext);
        bundleContext.addBundleListener((BundleListener) EasyMock.anyObject());
        bundleContext.addServiceListener((ServiceListener) EasyMock.anyObject());
        EasyMock.expect(bundleContext.getBundles()).andReturn(new Bundle[] { systemBundle });
        final Capture c = new Capture();
        EasyMock.expect(bundleContext.createFilter((String) capture(c))).andAnswer(new IAnswer() {
            public Object answer() throws Throwable {
                return FilterImpl.newInstance((String) c.getValue());

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        EasyMock.expect(systemBundle.getHeaders()).andReturn(new Hashtable());
        EasyMock.expect(systemBundle.getRegisteredServices()).andReturn(null);
        EasyMock.expect(new Long(systemBundle.getBundleId())).andReturn(new Long(0)).anyTimes();
        EasyMock.expect(systemBundle.getBundleContext()).andReturn(bundleContext);
        bundleContext.addBundleListener((BundleListener) EasyMock.anyObject());
        bundleContext.addServiceListener((ServiceListener) EasyMock.anyObject());
        EasyMock.expect(bundleContext.getBundles()).andReturn(new Bundle[] { systemBundle });
        EasyMock.expect(bundleContext.createFilter(null)).andReturn(new Filter() {
            public boolean match(ServiceReference reference) {
                return true;
            }

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          return ctx.getBundle(0).getBundleContext();
        }
      });
      if (systemBundle == null) systemBundle = ctx;
      systemBundle.addBundleListener(cacheClearoutListener);
      systemBundle.addServiceListener(cacheClearoutListener);
    }
  }


  private static final class ServiceKey
  {

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            // Register the JNDI service listener
            jndiServiceListener = new JNDIServiceListener(syscontext);
            try {
                String filter = "(" + Constants.OBJECTCLASS + "=" + ObjectFactory.class.getName() + ")";
                syscontext.addServiceListener(jndiServiceListener, filter);
            } catch (InvalidSyntaxException e) {
                // ignore
            }


            // Register the socket-binding services

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        Filter filter = EasyMock.createMock(Filter.class);
        EasyMock.replay(filter);
        
        BundleContext bc = EasyMock.createMock(BundleContext.class);
        EasyMock.expect(bc.createFilter("(objectClass=org.osgi.service.remoteserviceadmin.EndpointListener)")).andReturn(filter);
        bc.addServiceListener((ServiceListener) EasyMock.anyObject(), 
            EasyMock.eq("(objectClass=org.osgi.service.remoteserviceadmin.EndpointListener)"));
        EasyMock.expectLastCall();
        EasyMock.expect(bc.getServiceReferences("org.osgi.service.remoteserviceadmin.EndpointListener", null)).andReturn(null);
        bc.addBundleListener((BundleListener) EasyMock.anyObject());
        EasyMock.expectLastCall().andAnswer(new IAnswer<Object>() {

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        Filter filter = EasyMock.createMock(Filter.class);
        EasyMock.replay(filter);
        
        BundleContext bc = EasyMock.createMock(BundleContext.class);
        EasyMock.expect(bc.createFilter("(objectClass=org.osgi.service.remoteserviceadmin.EndpointListener)")).andReturn(filter);
        bc.addServiceListener((ServiceListener) EasyMock.anyObject(), 
            EasyMock.eq("(objectClass=org.osgi.service.remoteserviceadmin.EndpointListener)"));
        EasyMock.expectLastCall();
        EasyMock.expect(bc.getServiceReferences("org.osgi.service.remoteserviceadmin.EndpointListener", null)).andReturn(null);
        bc.addBundleListener((BundleListener) EasyMock.anyObject());
        EasyMock.expectLastCall();

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        EasyMock.expect(bc.createFilter((String) EasyMock.anyObject())).andAnswer(new IAnswer<Filter>() {
            public Filter answer() throws Throwable {
                return FrameworkUtil.createFilter((String) EasyMock.getCurrentArguments()[0]);
            }
        }).anyTimes();
        bc.addServiceListener((ServiceListener) EasyMock.anyObject(), 
            EasyMock.eq("(objectClass=org.osgi.service.remoteserviceadmin.EndpointListener)"));
        EasyMock.expectLastCall();
        EasyMock.expect(bc.getServiceReferences("org.osgi.service.remoteserviceadmin.EndpointListener", null)).andReturn(null);
        bc.addBundleListener((BundleListener) EasyMock.anyObject());
        EasyMock.expectLastCall();

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            // Register the JNDI service listener
            jndiServiceListener = new JNDIServiceListener(syscontext);
            try {
                String filter = "(" + Constants.OBJECTCLASS + "=" + ObjectFactory.class.getName() + ")";
                syscontext.addServiceListener(jndiServiceListener, filter);
            } catch (InvalidSyntaxException e) {
                // ignore
            }


            // Register the socket-binding services

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            ServiceListener listener = new ServiceListener() {
                public void serviceChanged(ServiceEvent event) {
                    commands.clear();
                }
            };
            context.addServiceListener(listener,
                    String.format("(&(%s=*)(%s=*))",
                            CommandProcessor.COMMAND_SCOPE,
                            CommandProcessor.COMMAND_FUNCTION));
        }
    }

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                    synchronized (CommandsCompleter.this) {
                        commands.clear();
                    }
                }
            };
            context.addServiceListener(listener,
                    String.format("(&(%s=*)(%s=*))",
                            CommandProcessor.COMMAND_SCOPE,
                            CommandProcessor.COMMAND_FUNCTION));
        }
    }

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