Examples of org.springframework.osgi.service.importer.support.OsgiServiceCollectionProxyFactoryBean

Package org.springframework.osgi.service.importer.support

Examples of org.springframework.osgi.service.importer.support.OsgiServiceCollectionProxyFactoryBean

org.springframework.osgi.service.importer.support.OsgiServiceCollectionProxyFactoryBean

OSGi service (collection) importer. This implementation creates a managed (read-only) collection of OSGi services. The returned collection automatically handles the OSGi services dynamics. If a new service that matches the configuration criteria appears, it will be automatically added to the collection. If a service that matches the criteria disappears (is unregistered), it will be automatically removed from the collection.

Due to the dynamic nature of OSGi services, the collection content can change at runtime, even during iteration. This implementation will correctly update all the collection Iterators so they reflect the collection content. This approach (as opposed to the 'snapshot' strategy) prevents dealing with dead services which can appear when imported services go down while iterating. This means that iterating while the collection is being changed is safe.

Note that the Iterator still has to be fulfilled meaning the next() method always obey the result of the previous hasNext() invocation:

`hasNext()` returned value	`next()` behaviour
`true`	Always return a non-null value, even when the collection has shrunk as services when away. This means returning a proxy that will throw an exception on an invocation that requires the backing service to be present.
`false`	per `Iterator` contract, `NoSuchElementException` is thrown. This applies even if other services are added to the collection.

Due to the dynamic nature of OSGi, hasNext() invocation made on the same Iterator can return different values based on the services availability. However, as explained above, next() will always obey the result of the last hasNext() method.

Note: Even though the collection and its iterators communicate in a thread-safe manner, iterators themselves are not thread-safe. Concurrent access on the iterators should be properly synchronized. Due to the light nature of the iterators, consider creating a new one rather then reusing or sharing. @see java.util.Iterator @see java.util.Collection @see java.util.List @see java.util.Set @see java.util.SortedSet @author Costin Leau

  /**
   * Creates a dynamic OSGi list of OSGi services interested in receiving
   * events for OSGi application contexts.
   */
  private void createListenersList() {
    OsgiServiceCollectionProxyFactoryBean fb = new OsgiServiceCollectionProxyFactoryBean();
    fb.setBundleContext(bundleContext);
    fb.setCardinality(Cardinality.C_0__N);
    fb.setCollectionType(CollectionType.LIST);
    fb.setInterfaces(new Class[] { OsgiBundleApplicationContextListener.class });
    fb.setBeanClassLoader(extenderConfiguration.getClassLoader());
    fb.afterPropertiesSet();


    applicationListenersCleaner = fb;
    applicationListeners = (List) fb.getObject();
  }

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    Class<?>[] params = writeMethod.getParameterTypes();
    if (params.length != 1) {
      throw new IllegalArgumentException("Setter for [" + beanName + "] must have only one argument");
    }
    if (Collection.class.isAssignableFrom(params[0])) {
      return getServiceProperty(new OsgiServiceCollectionProxyFactoryBean(), s, writeMethod, beanName);
    }
    else {
      return getServiceProperty(new OsgiServiceProxyFactoryBean(), s, writeMethod, beanName);
    }
  }

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    processor.getServiceProperty(pfb, ref, setter, null);
    assertFalse(pfb.getCardinality().isMandatory());
  }


  public void testProperMultiCardinality() throws Exception {
    OsgiServiceCollectionProxyFactoryBean pfb = new OsgiServiceCollectionProxyFactoryBean();


    Method setter = AnnotatedBean.class.getMethod("setAnnotatedBeanTypeWithCardinality0_N",
      new Class[] { List.class });
    ServiceReference ref = AnnotationUtils.getAnnotation(setter, ServiceReference.class);
    processor.getServiceProperty(pfb, ref, setter, null);
    assertFalse(pfb.getCardinality().isMandatory());


    setter = AnnotatedBean.class.getMethod("setAnnotatedBeanTypeWithCardinality1_N",
      new Class[] { SortedSet.class });
    ref = AnnotationUtils.getAnnotation(setter, ServiceReference.class);
    pfb = new OsgiServiceCollectionProxyFactoryBean();
    processor.getServiceProperty(pfb, ref, setter, null);
    assertTrue(pfb.getCardinality().isMandatory());
  }

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    processor.getServiceProperty(pfb, ref, setter, null);
    assertTrue(pfb.getCardinality().isMandatory());
  }


  public void testErrorMultiCardinality() throws Exception {
    OsgiServiceCollectionProxyFactoryBean pfb = new OsgiServiceCollectionProxyFactoryBean();


    Method setter = AnnotatedBean.class.getMethod("setAnnotatedBeanErrorTypeWithCardinality1_N",
      new Class[] { SortedSet.class });
    ServiceReference ref = AnnotationUtils.getAnnotation(setter, ServiceReference.class);
    pfb = new OsgiServiceCollectionProxyFactoryBean();
    try {
      processor.getServiceProperty(pfb, ref, setter, null);
      fail("IllegalArgumentException should have been thrown");
    }
    catch (Exception e) {

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  private OsgiServiceCollectionProxyFactoryBean fb;




  protected void onSetUp() throws Exception {
    fb = new OsgiServiceCollectionProxyFactoryBean();
    fb.setBundleContext(bundleContext);
    fb.setBeanClassLoader(getClass().getClassLoader());
  }

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  private OsgiServiceCollectionProxyFactoryBean fb;




  protected void onSetUp() throws Exception {
    fb = new OsgiServiceCollectionProxyFactoryBean();
    fb.setBundleContext(bundleContext);
    fb.setBeanClassLoader(getClass().getClassLoader());
  }

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  /**
   * Creates a dynamic OSGi list of OSGi services interested in receiving events for OSGi application contexts.
   */
  private void createListenersList() {
    OsgiServiceCollectionProxyFactoryBean fb = new OsgiServiceCollectionProxyFactoryBean();
    fb.setBundleContext(bundleContext);
    fb.setCardinality(Cardinality.C_0__N);
    fb.setCollectionType(CollectionType.LIST);
    fb.setInterfaces(new Class[] { OsgiBundleApplicationContextListener.class });
    fb.setBeanClassLoader(extenderConfiguration.getClassLoader());
    fb.afterPropertiesSet();


    applicationListenersCleaner = fb;
    applicationListeners = (List) fb.getObject();
  }

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  private ServiceReference ref;




  protected void setUp() throws Exception {
    super.setUp();
    this.serviceFactoryBean = new OsgiServiceCollectionProxyFactoryBean();
    // this.serviceFactoryBean.setApplicationContext(new
    // GenericApplicationContext());


    ref = new MockServiceReference(new String[] { Serializable.class.getName() });

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    OsgiServiceProxyFactoryBean fb = (OsgiServiceProxyFactoryBean) appContext.getBean("&refWLocalConfig");
    assertEquals(55, getTimeout(fb));
  }


  public void testLocalDefinitionForCardinalityOnMultiImporter() throws Exception {
    OsgiServiceCollectionProxyFactoryBean fb = (OsgiServiceCollectionProxyFactoryBean) appContext.getBean("&colWLocalConfig");
    assertEquals(Cardinality.C_1__N, getCardinality(fb));
  }

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    OsgiServiceProxyFactoryBean fb = (OsgiServiceProxyFactoryBean) appContext.getBean("&refWDefaults");
    assertEquals(Cardinality.C_0__1, getCardinality(fb));
  }


  public void testCardinalityDefaultOnMultiImporter() throws Exception {
    OsgiServiceCollectionProxyFactoryBean fb = (OsgiServiceCollectionProxyFactoryBean) appContext.getBean("&colWDefaults");
    assertEquals(Cardinality.C_0__N, getCardinality(fb));
  }

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