Java 类javax.servlet.http.HttpSessionBindingListener 实例源码

@Override
public void attributeUpdated(final Session session, final String name, final Object value, final Object old) {
    if(name.startsWith(IO_UNDERTOW)) {
        return;
    }
    final HttpSessionImpl httpSession = SecurityActions.forSession(session, servletContext, false);
    if (old != value) {
        if (old instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) old).valueUnbound(new HttpSessionBindingEvent(httpSession, name, old));
        }
        applicationListeners.httpSessionAttributeReplaced(httpSession, name, old);
    }
    if (value instanceof HttpSessionBindingListener) {
        ((HttpSessionBindingListener) value).valueBound(new HttpSessionBindingEvent(httpSession, name, value));
    }
}

/**
 * Serialize the attributes of this session into an object that can be
 * turned into a byte array with standard Java serialization.
 *
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Serializable> state = new HashMap<String, Serializable>();
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, (Serializable) value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

/**
 * Serialize the attributes of this session into an object that can be
 * turned into a byte array with standard Java serialization.
 *
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Serializable> state = new HashMap<String, Serializable>();
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, (Serializable) value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

/**
 * Serialize the attributes of this session into an object that can be
 * turned into a byte array with standard Java serialization.
 *
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Serializable> state = new HashMap<String, Serializable>();
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, (Serializable) value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

@Test
public void shouldUnbindOnInvalidate() throws Exception {

    Map<String, Object> sampleData = new HashMap<>();
    HttpSessionBindingListener mockA = mock(HttpSessionBindingListener.class);
    HttpSessionBindingListener mockC = mock(HttpSessionBindingListener.class);
    sampleData.put("a", mockA);
    sampleData.put("b", "b");
    sampleData.put("c", mockC);
    sampleData.put("b", "b");
    when(session.data()).thenReturn(sampleData);
    vertxWrappedSession.invalidate();
    verify(session).destroy();
    ArgumentCaptor<HttpSessionBindingEvent> sessionBindingEventCaptor = ArgumentCaptor.forClass(HttpSessionBindingEvent.class);
    verify(mockA).valueUnbound(sessionBindingEventCaptor.capture());
    verify(mockC).valueUnbound(sessionBindingEventCaptor.capture());
    assertThat(sessionBindingEventCaptor.getAllValues()).hasSize(2);
    assertHttpSessionBindingEvent("a", mockA, sessionBindingEventCaptor.getAllValues().get(0));
    assertHttpSessionBindingEvent("c", mockC, sessionBindingEventCaptor.getAllValues().get(1));
}

/**
 * Serialize the attributes of this session into an object that can be
 * turned into a byte array with standard Java serialization.
 *
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Serializable> state = new HashMap<String, Serializable>();
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, (Serializable) value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

/**
 * Removes the object bound with the specified name from
 * this session.
 */
public void removeAttribute(String name) {
  maybeThrowIllegalStateException();
  checkValid();
  Object value = getAttribute(name);
  // notify binding listeners
  if (value != null) {
    sessionData_.remove(name);
    updateCache();
    if (value instanceof HttpSessionBindingListener) {
      ((HttpSessionBindingListener) value).valueUnbound(
        new HttpSessionBindingEvent(this, name));
    }
  }
  // notify attribute listeners
  ServletSessionCache.getCache(cacheId_).
    notifySessionAttributeRemoved(this, name);
}

/**
 * Serialize the attributes of this session into an object that can
 * be turned into a byte array with standard Java serialization.
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap state = new HashMap();
    for (Iterator it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry entry = (Map.Entry) it.next();
        String name = (String) entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

public Serializable serializeState() {
    HashMap<String, Serializable> state = new HashMap<String, Serializable>();
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, (Serializable) value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

/**
 * Serialize the attributes of this session into an object that can
 * be turned into a byte array with standard Java serialization.
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Object> state = new HashMap<String, Object>();
    for (Iterator it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry entry = (Map.Entry) it.next();
        String name = (String) entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, value);
        }
        else {
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

/**
 * Binds an object to this session, using the name specified. If an object of 
 * the same name is already bound to the session, the object is replaced.
 * @param name The name to which the object is bound; cannot be null.
 * @param value The object to be bound.
 */
public void setAttribute(String name, Object value) {
    if (!isValid())
        throw new IllegalStateException(
            "Method is called on an invalidated session");
    if (value == null) removeAttribute(name);
    else {
        attributes.put(name, value);
        try {
            HttpSessionBindingListener listener = (HttpSessionBindingListener) value;
            listener.valueBound(new HttpSessionBindingEvent(this, name, value));
            listener.notifyAll();
        }
        catch (ClassCastException e) { }
    }
}

private void cleanUpAttributes() {
    if (!isValid())
        throw new IllegalStateException(
            "Method is called on an invalidated session");
    Iterator iter = attributes.entrySet().iterator();
    while (iter.hasNext()) {
        Entry e = (Entry) iter.next();
        String name = e.getKey() + "";
        Object value = e.getValue();
        iter.remove();
        try {
            HttpSessionBindingListener listener = (HttpSessionBindingListener) value;
            listener.valueUnbound(new HttpSessionBindingEvent(this, name, value));
            listener.notifyAll();
        }
        catch (ClassCastException err) { }
    }
}

/**
 * Serialize the attributes of this session into an object that can be
 * turned into a byte array with standard Java serialization.
 *
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Serializable> state = new HashMap<String, Serializable>();
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, (Serializable) value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

/**
 * Serialize the attributes of this session into an object that can be
 * turned into a byte array with standard Java serialization.
 *
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Serializable> state = new HashMap<String, Serializable>();
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, (Serializable) value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

/**
 * Serialize the attributes of this session into an object that can
 * be turned into a byte array with standard Java serialization.
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Object> state = new HashMap<String, Object>();
    for (Iterator it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry entry = (Map.Entry) it.next();
        String name = (String) entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, value);
        }
        else {
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

/**
 * Serialize the attributes of this session into an object that can be
 * turned into a byte array with standard Java serialization.
 * @return a representation of this session's serialized state
 */
public Serializable serializeState() {
    HashMap<String, Serializable> state = new HashMap<>();
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof Serializable) {
            state.put(name, (Serializable) value);
        }
        else {
            // Not serializable... Servlet containers usually automatically
            // unbind the attribute in this case.
            if (value instanceof HttpSessionBindingListener) {
                ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
            }
        }
    }
    return state;
}

private static boolean isWeb(final Class<?> beanClass) {
    if (Servlet.class.isAssignableFrom(beanClass)
        || Filter.class.isAssignableFrom(beanClass)) {
        return true;
    }
    if (EventListener.class.isAssignableFrom(beanClass)) {
        return HttpSessionAttributeListener.class.isAssignableFrom(beanClass)
               || ServletContextListener.class.isAssignableFrom(beanClass)
               || ServletRequestListener.class.isAssignableFrom(beanClass)
               || ServletContextAttributeListener.class.isAssignableFrom(beanClass)
               || HttpSessionListener.class.isAssignableFrom(beanClass)
               || HttpSessionBindingListener.class.isAssignableFrom(beanClass)
               || HttpSessionActivationListener.class.isAssignableFrom(beanClass)
               || HttpSessionIdListener.class.isAssignableFrom(beanClass)
               || ServletRequestAttributeListener.class.isAssignableFrom(beanClass);
    }

    return false;
}

@Override
public void removeAttribute(String name) {
    if (attributes != null) {
        Object value = attributes.get(name);
        if (value != null && value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
        }
        attributes.remove(name);
    }
}

@Override
public void setAttribute(String name, Object value) {
    attributes.put(name, value);

    if (value != null && value instanceof HttpSessionBindingListener) {
        ((HttpSessionBindingListener) value).valueBound(new HttpSessionBindingEvent(this, name, value));
    }

}

@Override
public void attributeAdded(final Session session, final String name, final Object value) {
    if(name.startsWith(IO_UNDERTOW)) {
        return;
    }
    final HttpSessionImpl httpSession = SecurityActions.forSession(session, servletContext, false);
    applicationListeners.httpSessionAttributeAdded(httpSession, name, value);
    if (value instanceof HttpSessionBindingListener) {
        ((HttpSessionBindingListener) value).valueBound(new HttpSessionBindingEvent(httpSession, name, value));
    }
}

@Override
public void attributeRemoved(final Session session, final String name, final Object old) {
    if(name.startsWith(IO_UNDERTOW)) {
        return;
    }
    final HttpSessionImpl httpSession = SecurityActions.forSession(session, servletContext, false);
    if (old != null) {
        applicationListeners.httpSessionAttributeRemoved(httpSession, name, old);
        if (old instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) old).valueUnbound(new HttpSessionBindingEvent(httpSession, name, old));
        }
    }
}

public void setAttribute(String string, Object object) {
    Object originalValue = attr.put(string, object);
    if (originalValue != null && originalValue instanceof HttpSessionBindingListener) {
        ((HttpSessionBindingListener) originalValue).valueUnbound(new HttpSessionBindingEvent(this, string));
    }
    if (object != null && object instanceof HttpSessionBindingListener) {
        ((HttpSessionBindingListener) object).valueBound(new HttpSessionBindingEvent(this, string));
    }
}

/**
 * Notifies listeners that attribute was added. See {@link SessionNotifier}
 * {@link #attributeAdded(RepositoryBackedSession, String, Object)}.
 * <p>
 * If the added attribute <code>value</code> is a HttpSessionBindingListener,
 * it will receive the {@link HttpSessionBindingEvent}. If there are
 * {@link HttpSessionAttributeListener} instances associated to
 * {@link ServletContext}, they will be notified via
 * {@link HttpSessionAttributeListener#attributeAdded(HttpSessionBindingEvent)}
 * .
 */
@Override
public void attributeAdded(RepositoryBackedSession session, String key, Object value) {
  // If the
  if (session instanceof HttpSession && value instanceof HttpSessionBindingListener) {
    ((HttpSessionBindingListener)value).valueBound(new HttpSessionBindingEvent((HttpSession)session, key));
  }
  HttpSessionBindingEvent event = new HttpSessionBindingEvent((HttpSession)session, key, value);
  for (HttpSessionAttributeListener listener : descriptor.getHttpSessionAttributeListeners()) {
    listener.attributeAdded(event);
  }
}

@Test
public void testAttributeAdded() {
  HttpSessionAttributeListener listener = mock(HttpSessionAttributeListener.class);
  descriptor.addHttpSessionAttributeListener(listener);
  notifier.attributeAdded(session, "Test", "value");
  verify(listener).attributeAdded(any(HttpSessionBindingEvent.class));
  HttpSessionBindingListener bindingListener = mock(HttpSessionBindingListener.class);
  notifier.attributeAdded(session, "Test", bindingListener);
  verify(listener, times(2)).attributeAdded(any(HttpSessionBindingEvent.class));
  verify(bindingListener).valueBound(any(HttpSessionBindingEvent.class));
}

@Test
public void testAttributeReplaced() {
  HttpSessionAttributeListener listener = mock(HttpSessionAttributeListener.class);
  notifier.attributeReplaced(session, "Test", "very-old-value");
  verify(listener, never()).attributeReplaced(any(HttpSessionBindingEvent.class));
  descriptor.addHttpSessionAttributeListener(listener);
  notifier.attributeReplaced(session, "Test", "old-value");
  verify(listener).attributeReplaced(any(HttpSessionBindingEvent.class));
  HttpSessionBindingListener bindingListener = mock(HttpSessionBindingListener.class);
  notifier.attributeReplaced(session, "Test", bindingListener);
  verify(listener, times(2)).attributeReplaced(any(HttpSessionBindingEvent.class));
  verify(bindingListener).valueUnbound(any(HttpSessionBindingEvent.class));
}

@Test
public void testAttributeRemoved() {
  notifier.attributeRemoved(session, "Test", "very-old-value");
  HttpSessionAttributeListener listener = mock(HttpSessionAttributeListener.class);
  descriptor.addHttpSessionAttributeListener(listener);
  notifier.attributeRemoved(session, "Test", "old-value");
  verify(listener).attributeRemoved(any(HttpSessionBindingEvent.class));
  HttpSessionBindingListener bindingListener = mock(HttpSessionBindingListener.class);
  notifier.attributeRemoved(session, "Test", bindingListener);
  verify(listener, times(2)).attributeRemoved(any(HttpSessionBindingEvent.class));
  verify(bindingListener).valueUnbound(any(HttpSessionBindingEvent.class));
}

@Override
public void setAttribute(String name, Object value) {
    assertIsValid();
    Assert.notNull(name, "Attribute name must not be null");
    if (value != null) {
        this.attributes.put(name, value);
        if (value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueBound(new HttpSessionBindingEvent(this, name, value));
        }
    }
    else {
        removeAttribute(name);
    }
}

@Override
public void removeAttribute(String name) {
    assertIsValid();
    Assert.notNull(name, "Attribute name must not be null");
    Object value = this.attributes.remove(name);
    if (value instanceof HttpSessionBindingListener) {
        ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
    }
}

/**
 * Clear all of this session's attributes.
 */
public void clearAttributes() {
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
        }
    }
}

protected void doClearAttributes(Map<String, Object> attributes) {
    for (Iterator<Map.Entry<String, Object>> it = attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueUnbound(
                    new HttpSessionBindingEvent(new MockHttpSession(), name, value));
        }
    }
}

@Override
public void setAttribute(String name, Object value) {
    assertIsValid();
    Assert.notNull(name, "Attribute name must not be null");
    if (value != null) {
        this.attributes.put(name, value);
        if (value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueBound(new HttpSessionBindingEvent(this, name, value));
        }
    }
    else {
        removeAttribute(name);
    }
}

@Override
public void removeAttribute(String name) {
    assertIsValid();
    Assert.notNull(name, "Attribute name must not be null");
    Object value = this.attributes.remove(name);
    if (value instanceof HttpSessionBindingListener) {
        ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
    }
}

/**
 * Clear all of this session's attributes.
 */
public void clearAttributes() {
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
        }
    }
}

@Override
public void setAttribute(String name, Object value) {
    assertIsValid();
    Assert.notNull(name, "Attribute name must not be null");
    if (value != null) {
        this.attributes.put(name, value);
        if (value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueBound(new HttpSessionBindingEvent(this, name, value));
        }
    }
    else {
        removeAttribute(name);
    }
}

@Override
public void removeAttribute(String name) {
    assertIsValid();
    Assert.notNull(name, "Attribute name must not be null");
    Object value = this.attributes.remove(name);
    if (value instanceof HttpSessionBindingListener) {
        ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
    }
}

/**
 * Clear all of this session's attributes.
 */
public void clearAttributes() {
    for (Iterator<Map.Entry<String, Object>> it = this.attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueUnbound(new HttpSessionBindingEvent(this, name, value));
        }
    }
}

protected void doClearAttributes(Map<String, Object> attributes) {
    for (Iterator<Map.Entry<String, Object>> it = attributes.entrySet().iterator(); it.hasNext();) {
        Map.Entry<String, Object> entry = it.next();
        String name = entry.getKey();
        Object value = entry.getValue();
        it.remove();
        if (value instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) value).valueUnbound(
                    new HttpSessionBindingEvent(new MockHttpSession(), name, value));
        }
    }
}

@Override
// TODO: catch HttpSessionBindingListener exceptions?
public void invalidate() {
    checkSessionState();
    Map<String, HttpSessionBindingListener> toUnbind = delegate.data().entrySet().stream()
        .filter( entry -> HttpSessionBindingListener.class.isInstance(entry.getValue()))
        .collect(toMap(Map.Entry::getKey, e -> HttpSessionBindingListener.class.cast(e.getValue())));
    delegate.destroy();
    toUnbind.forEach( (name, listener) -> listener.valueUnbound(createHttpSessionBindingEvent(name,listener)));
    toUnbind.clear();
}

public void valueBound(HttpSessionBindingEvent event) {
    for (EventListener listener: PluginWebInstanceRepository.getListeners()) {
        if (listener instanceof HttpSessionBindingListener) {
            ((HttpSessionBindingListener) listener).valueBound(event);
        }
    }
}

public void valueUnbound(HttpSessionBindingEvent event) {
    for (EventListener listener: PluginWebInstanceRepository.getListeners()) {
        if (listener instanceof HttpSessionActivationListener) {
            ((HttpSessionBindingListener) listener).valueUnbound(event);
        }
    }
}