Ejemplo n.º 1
0
  /**
   * 第一步:通过subscriptionsByEventType得到该事件类型所有订阅者信息队列,根据优先级将当前订阅者信息插入到订阅者队列subscriptionsByEventType中;
   * 第二步:在typesBySubscriber中得到当前订阅者订阅的所有事件队列,将此事件保存到队列typesBySubscriber中,用于后续取消订阅; 第三步:检查这个事件是否是
   * Sticky 事件,如果是则从stickyEvents事件保存队列中取出该事件类型最后一个事件发送给当前订阅者。
   *
   * @param subscriber
   * @param subscriberMethod
   * @param sticky
   * @param priority
   */
  private void subscribe(
      Object subscriber, SubscriberMethod subscriberMethod, boolean sticky, int priority) {
    Class<?> eventType = subscriberMethod.eventType;
    CopyOnWriteArrayList<Subscription> subscriptions =
        subscriptionsByEventType.get(eventType); // 通过subscriptionsByEventType得到该事件类型所有订阅者信息队列
    Subscription newSubscription = new Subscription(subscriber, subscriberMethod, priority);
    // 根据当前的eventType,在subscriptionsByEventType生成对应的key-value(没有则加入,有则跳过次处理)
    if (subscriptions == null) {
      subscriptions = new CopyOnWriteArrayList<Subscription>();
      subscriptionsByEventType.put(eventType, subscriptions);
    } else {
      if (subscriptions.contains(newSubscription)) {
        throw new EventBusException(
            "Subscriber " + subscriber.getClass() + " already registered to event " + eventType);
      }
    }

    // Starting with EventBus 2.2 we enforced methods to be public (might change with annotations
    // again)
    // subscriberMethod.method.setAccessible(true);

    // 根据优先级将当前订阅者信息插入到订阅者队列subscriptionsByEventType中;
    int size = subscriptions.size();
    for (int i = 0; i <= size; i++) {
      if (i == size || newSubscription.priority > subscriptions.get(i).priority) {
        subscriptions.add(i, newSubscription);
        break;
      }
    }

    // 在typesBySubscriber中得到当前订阅者订阅的所有事件队列,将此事件保存到队列typesBySubscriber中,用于后续取消订阅;
    List<Class<?>> subscribedEvents = typesBySubscriber.get(subscriber);
    if (subscribedEvents == null) {
      subscribedEvents = new ArrayList<Class<?>>();
      typesBySubscriber.put(subscriber, subscribedEvents);
    }
    subscribedEvents.add(eventType);

    // 检查这个事件是否是 Sticky 事件,如果是,则从stickyEvents事件保存队列中取出该事件类型最后一个事件发送给当前订阅者。
    if (sticky) {
      if (eventInheritance) {
        // Existing sticky events of all subclasses of eventType have to be considered.
        // Note: Iterating over all events may be inefficient with lots of sticky events,
        // thus data structure should be changed to allow a more efficient lookup
        // (e.g. an additional map storing sub classes of super classes: Class -> List<Class>).
        Set<Map.Entry<Class<?>, Object>> entries = stickyEvents.entrySet();
        for (Map.Entry<Class<?>, Object> entry : entries) {
          Class<?> candidateEventType = entry.getKey();
          if (eventType.isAssignableFrom(
              candidateEventType)) { // 是用来判断一个类Class1和另一个类Class2是否相同或是另一个类的超类或接口
            Object stickyEvent = entry.getValue();
            checkPostStickyEventToSubscription(newSubscription, stickyEvent);
          }
        }
      } else {
        Object stickyEvent = stickyEvents.get(eventType);
        checkPostStickyEventToSubscription(newSubscription, stickyEvent);
      }
    }
  }
Ejemplo n.º 2
0
  private final boolean private_callProcedure(
      ProcedureCallback callback,
      int expectedSerializedSize,
      ProcedureInvocation invocation,
      long timeoutNanos)
      throws IOException, NoConnectionsException {
    if (m_isShutdown) {
      return false;
    }

    if (callback == null) {
      callback = new NullCallback();
    }

    // Blessed threads (the ones that invoke callbacks) are not subject to backpressure
    boolean isBlessed = m_blessedThreadIds.contains(Thread.currentThread().getId());
    if (m_blockingQueue) {
      while (!m_distributer.queue(invocation, callback, isBlessed, timeoutNanos)) {
        try {
          backpressureBarrier();
        } catch (InterruptedException e) {
          throw new java.io.InterruptedIOException(
              "Interrupted while invoking procedure asynchronously");
        }
      }
      return true;
    } else {
      return m_distributer.queue(invocation, callback, isBlessed, timeoutNanos);
    }
  }
Ejemplo n.º 3
0
  /**
   * Removes the specified driver from the {@code DriverManager}'s list of registered drivers.
   *
   * <p>If a {@code null} value is specified for the driver to be removed, then no action is taken.
   *
   * <p>If a security manager exists and its {@code checkPermission} denies permission, then a
   * {@code SecurityException} will be thrown.
   *
   * <p>If the specified driver is not found in the list of registered drivers, then no action is
   * taken. If the driver was found, it will be removed from the list of registered drivers.
   *
   * <p>If a {@code DriverAction} instance was specified when the JDBC driver was registered, its
   * deregister method will be called prior to the driver being removed from the list of registered
   * drivers.
   *
   * @param driver the JDBC Driver to remove
   * @exception SQLException if a database access error occurs
   * @throws SecurityException if a security manager exists and its {@code checkPermission} method
   *     denies permission to deregister a driver.
   * @see SecurityManager#checkPermission
   */
  @CallerSensitive
  public static synchronized void deregisterDriver(Driver driver) throws SQLException {
    if (driver == null) {
      return;
    }

    SecurityManager sec = System.getSecurityManager();
    if (sec != null) {
      sec.checkPermission(DEREGISTER_DRIVER_PERMISSION);
    }

    println("DriverManager.deregisterDriver: " + driver);

    DriverInfo aDriver = new DriverInfo(driver, null);
    if (registeredDrivers.contains(aDriver)) {
      if (isDriverAllowed(driver, Reflection.getCallerClass())) {
        DriverInfo di = registeredDrivers.get(registeredDrivers.indexOf(aDriver));
        // If a DriverAction was specified, Call it to notify the
        // driver that it has been deregistered
        if (di.action() != null) {
          di.action().deregister();
        }
        registeredDrivers.remove(aDriver);
      } else {
        // If the caller does not have permission to load the driver then
        // throw a SecurityException.
        throw new SecurityException();
      }
    } else {
      println("    couldn't find driver to unload");
    }
  }
Ejemplo n.º 4
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  private final ClientResponse callProcedure(
      SyncCallback cb, long nowNanos, long timeout, ProcedureInvocation invocation)
      throws IOException, NoConnectionsException, ProcCallException {
    if (m_isShutdown) {
      throw new NoConnectionsException("Client instance is shutdown");
    }

    if (m_blessedThreadIds.contains(Thread.currentThread().getId())) {
      throw new IOException(
          "Can't invoke a procedure synchronously from with the client callback thread "
              + " without deadlocking the client library");
    }

    m_distributer.queue(invocation, cb, true, nowNanos, timeout);

    try {
      cb.waitForResponse();
    } catch (final InterruptedException e) {
      throw new java.io.InterruptedIOException("Interrupted while waiting for response");
    }
    if (cb.getResponse().getStatus() != ClientResponse.SUCCESS) {
      throw new ProcCallException(cb.getResponse(), cb.getResponse().getStatusString(), null);
    }
    // cb.result() throws ProcCallException if procedure failed
    return cb.getResponse();
  }
Ejemplo n.º 5
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  /**
   * Add listener using the specified frequency. Must be de-regsitered again using removeListener
   *
   * @param listener
   * @param frequency the frequency to call this listener. One of FREQUENCY_HIGH, FREQUENCY_MEDIUM,
   *     FREQUENCY_LOW
   */
  public void addListener(HeartListener listen, int frequency) {
    if (!highFrequencyListeners.contains(listen)
        && !mediumFrequencyListeners.contains(listen)
        && !lowFrequencyListeners.contains(listen)) {

      switch (frequency) {
        case FREQUENCY_HIGH:
          highFrequencyListeners.add(listen);
          break;
        case FREQUENCY_MEDIUM:
          mediumFrequencyListeners.add(listen);
          break;
        case FREQUENCY_LOW:
          lowFrequencyListeners.add(listen);
          break;
      }
    }
  }
Ejemplo n.º 6
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  private final boolean private_callProcedure(
      ProcedureCallback callback,
      int expectedSerializedSize,
      ProcedureInvocation invocation,
      long timeoutNanos)
      throws IOException, NoConnectionsException {
    if (m_isShutdown) {
      return false;
    }

    if (callback == null) {
      callback = new NullCallback();
    }

    final long nowNanos = System.nanoTime();

    // Blessed threads (the ones that invoke callbacks) are not subject to backpressure
    boolean isBlessed = m_blessedThreadIds.contains(Thread.currentThread().getId());
    if (m_blockingQueue) {
      while (!m_distributer.queue(invocation, callback, isBlessed, nowNanos, timeoutNanos)) {

        /*
         * Wait on backpressure honoring the timeout settings
         */
        final long delta = Math.max(1, System.nanoTime() - nowNanos);
        final long timeout =
            timeoutNanos == Distributer.USE_DEFAULT_CLIENT_TIMEOUT
                ? m_distributer.getProcedureTimeoutNanos()
                : timeoutNanos;
        try {
          if (backpressureBarrier(nowNanos, timeout - delta)) {
            final ClientResponseImpl r =
                new ClientResponseImpl(
                    ClientResponse.CONNECTION_TIMEOUT,
                    ClientResponse.UNINITIALIZED_APP_STATUS_CODE,
                    "",
                    new VoltTable[0],
                    String.format(
                        "No response received in the allotted time (set to %d ms).",
                        TimeUnit.NANOSECONDS.toMillis(timeoutNanos)));
            try {
              callback.clientCallback(r);
            } catch (Throwable t) {
              m_distributer.uncaughtException(callback, r, t);
            }
          }
        } catch (InterruptedException e) {
          throw new java.io.InterruptedIOException(
              "Interrupted while invoking procedure asynchronously");
        }
      }
      return true;
    } else {
      return m_distributer.queue(invocation, callback, isBlessed, nowNanos, timeoutNanos);
    }
  }
Ejemplo n.º 7
0
  @Override
  public synchronized void add(int index, Layer layer) {
    if (mLayerList.contains(layer)) throw new IllegalArgumentException("layer added twice");

    if (layer instanceof UpdateListener) mMap.events.bind((UpdateListener) layer);

    if (layer instanceof InputListener) mMap.input.bind((InputListener) layer);

    mLayerList.add(index, layer);
    mDirtyLayers = true;
  }
Ejemplo n.º 8
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 @Override
 public void drain() throws InterruptedException {
   if (m_isShutdown) {
     return;
   }
   if (m_blessedThreadIds.contains(Thread.currentThread().getId())) {
     throw new RuntimeException(
         "Can't invoke backpressureBarrier from within the client callback thread "
             + " without deadlocking the client library");
   }
   m_distributer.drain();
 }
Ejemplo n.º 9
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  @Override
  public synchronized Layer set(int index, Layer layer) {
    if (mLayerList.contains(layer)) throw new IllegalArgumentException("layer added twice");

    mDirtyLayers = true;
    Layer remove = mLayerList.set(index, layer);

    // unbind replaced layer
    if (remove instanceof UpdateListener) mMap.events.unbind((UpdateListener) remove);
    if (remove instanceof InputListener) mMap.input.unbind((InputListener) remove);

    return remove;
  }
Ejemplo n.º 10
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 /**
  * Shutdown the client closing all network connections and release all memory resources.
  *
  * @throws InterruptedException
  */
 @Override
 public void close() throws InterruptedException {
   if (m_blessedThreadIds.contains(Thread.currentThread().getId())) {
     throw new RuntimeException(
         "Can't invoke backpressureBarrier from within the client callback thread "
             + " without deadlocking the client library");
   }
   m_isShutdown = true;
   synchronized (m_backpressureLock) {
     m_backpressureLock.notifyAll();
   }
   m_distributer.shutdown();
 }
Ejemplo n.º 11
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 public void registerEventListener(String event, GeckoEventListener listener) {
   synchronized (mEventListeners) {
     CopyOnWriteArrayList<GeckoEventListener> listeners = mEventListeners.get(event);
     if (listeners == null) {
       // create a CopyOnWriteArrayList so that we can modify it
       // concurrently with iterating through it in handleGeckoMessage.
       // Otherwise we could end up throwing a ConcurrentModificationException.
       listeners = new CopyOnWriteArrayList<GeckoEventListener>();
     } else if (listeners.contains(listener)) {
       Log.w(
           LOGTAG,
           "EventListener already registered for event '" + event + "'",
           new IllegalArgumentException());
     }
     listeners.add(listener);
     mEventListeners.put(event, listeners);
   }
 }
Ejemplo n.º 12
0
 @Override
 public void backpressureBarrier() throws InterruptedException {
   if (m_isShutdown) {
     return;
   }
   if (m_blessedThreadIds.contains(Thread.currentThread().getId())) {
     throw new RuntimeException(
         "Can't invoke backpressureBarrier from within the client callback thread "
             + " without deadlocking the client library");
   }
   if (m_backpressure) {
     synchronized (m_backpressureLock) {
       if (m_backpressure) {
         while (m_backpressure && !m_isShutdown) {
           m_backpressureLock.wait();
         }
       }
     }
   }
 }
Ejemplo n.º 13
0
  /**
   * Wait on backpressure with a timeout. Returns true on timeout, false otherwise. Timeout nanos is
   * the initial timeout quantity which will be adjusted to reflect remaining time on spurious
   * wakeups
   */
  public boolean backpressureBarrier(final long start, long timeoutNanos)
      throws InterruptedException {
    if (m_isShutdown) {
      return false;
    }
    if (m_blessedThreadIds.contains(Thread.currentThread().getId())) {
      throw new RuntimeException(
          "Can't invoke backpressureBarrier from within the client callback thread "
              + " without deadlocking the client library");
    }
    if (m_backpressure) {
      synchronized (m_backpressureLock) {
        if (m_backpressure) {
          while (m_backpressure && !m_isShutdown) {
            if (start != 0) {
              // Wait on the condition for the specified timeout remaining
              m_backpressureLock.wait(
                  timeoutNanos / TimeUnit.MILLISECONDS.toNanos(1),
                  (int) (timeoutNanos % TimeUnit.MILLISECONDS.toNanos(1)));

              // Condition is true, break and return false
              if (!m_backpressure) break;

              // Calculate whether the timeout should be triggered
              final long nowNanos = System.nanoTime();
              final long deltaNanos = Math.max(1, nowNanos - start);
              if (deltaNanos >= timeoutNanos) {
                return true;
              }

              // Reassigning timeout nanos with remainder of timeout
              timeoutNanos -= deltaNanos;
            } else {
              m_backpressureLock.wait();
            }
          }
        }
      }
    }
    return false;
  }
Ejemplo n.º 14
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 public void addPlanetSelectedListener(OnPlanetSelectedListener listener) {
   if (!mPlanetSelectedListeners.contains(listener)) {
     mPlanetSelectedListeners.add(listener);
   }
 }
Ejemplo n.º 15
0
 @Override
 public void addListener(INetworkConnectionListener listener) {
   if (!listeners.contains(listener)) {
     listeners.add(listener);
   }
 }
Ejemplo n.º 16
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 public void registerListener(SmilesListener listener) {
   if (!listeners.contains(listener)) {
     listeners.add(listener);
   }
 }
 /**
  * Add a data callback.
  *
  * @param dataCallback the data callback
  */
 public void addDataCallback(OneSheeldDataCallback dataCallback) {
   if (dataCallback != null && !dataCallbacks.contains(dataCallback))
     dataCallbacks.add(dataCallback);
 }
 /**
  * Add an error callback.
  *
  * @param errorCallback the error callback
  */
 public void addErrorCallback(OneSheeldErrorCallback errorCallback) {
   if (errorCallback != null && !errorCallbacks.contains(errorCallback))
     errorCallbacks.add(errorCallback);
 }
 /**
  * Add a version query callback.
  *
  * @param versionQueryCallback the version query callback
  */
 public void addVersionQueryCallback(OneSheeldVersionQueryCallback versionQueryCallback) {
   if (versionQueryCallback != null && !versionQueryCallbacks.contains(versionQueryCallback))
     versionQueryCallbacks.add(versionQueryCallback);
 }
Ejemplo n.º 20
0
 /**
  * @param String
  * @return boolean
  */
 public boolean contains(String str) {
   return (m_channelTopics.contains(str));
 }
 /**
  * Remove a connection callback.
  *
  * @param connectionCallback the connection callback
  */
 public void removeConnectionCallback(OneSheeldConnectionCallback connectionCallback) {
   if (connectionCallback != null && connectionCallbacks.contains(connectionCallback))
     connectionCallbacks.remove(connectionCallback);
 }
 /**
  * Remove an error callback.
  *
  * @param errorCallback the error callback
  */
 public void removeErrorCallback(OneSheeldErrorCallback errorCallback) {
   if (errorCallback != null && errorCallbacks.contains(errorCallback))
     errorCallbacks.remove(errorCallback);
 }
 /**
  * Remove a data callback.
  *
  * @param dataCallback the data callback
  */
 public void removeDataCallback(OneSheeldDataCallback dataCallback) {
   if (dataCallback != null && dataCallbacks.contains(dataCallback))
     dataCallbacks.remove(dataCallback);
 }
 /**
  * Add a connection callback.
  *
  * @param connectionCallback the connection callback
  */
 public void addConnectionCallback(OneSheeldConnectionCallback connectionCallback) {
   if (connectionCallback != null && !connectionCallbacks.contains(connectionCallback))
     connectionCallbacks.add(connectionCallback);
 }
Ejemplo n.º 25
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 public void addDialog(DialogWrapper d) {
   if (!dialogs.contains(d)) {
     dialogs.add(d);
   }
 }
 /**
  * Remove a version query callback.
  *
  * @param versionQueryCallback the version query callback
  */
 public void removeVersionQueryCallback(OneSheeldVersionQueryCallback versionQueryCallback) {
   if (versionQueryCallback != null && versionQueryCallbacks.contains(versionQueryCallback))
     versionQueryCallbacks.remove(versionQueryCallback);
 }
 @Override
 public boolean contains(final Object o) {
   return copyOnWriteArrayList.contains(o);
 }
 @Override
 public void onNewShieldFrameReceived(ShieldFrame frame) {
   if (frame.getShieldId() == UIShield.DATA_LOGGER.getId()) {
     switch (frame.getFunctionId()) {
       case START_LOGGING:
         if (frame.getArguments().size() > 0) fileName = frame.getArgumentAsString(0);
         else fileName = null;
         headerList = new CopyOnWriteArrayList<String>();
         dataSet = new ArrayList<Map<String, String>>();
         rowData = new HashMap<String, String>();
         currentStatus = LOGGING;
         isStarted = true;
         if (eventHandler != null) {
           eventHandler.onStartLogging();
         }
         break;
       case STOP_LOGGING:
         saveData();
         break;
       case ADD_STRING:
         if (isStarted) {
           currentStatus = LOGGING;
           String key = frame.getArgumentAsString(0);
           String value = frame.getArgumentAsString(1);
           if (!headerList.contains(key)) headerList.add(key);
           rowData.put(key, value);
           if (eventHandler != null) {
             eventHandler.onAdd(key, value);
           }
         }
         break;
       case ADD_FLOAT:
         if (isStarted) {
           currentStatus = LOGGING;
           String keyFloat = frame.getArgumentAsString(0);
           String valueFloat = frame.getArgumentAsFloat(1) + "";
           if (!headerList.contains(keyFloat)) headerList.add(keyFloat);
           rowData.put(keyFloat, valueFloat);
           if (eventHandler != null) {
             eventHandler.onAdd(keyFloat, valueFloat);
           }
         }
         break;
       case LOG:
         if (isStarted) {
           currentStatus = LOGGING;
           if (eventHandler != null) {
             eventHandler.onLog(new HashMap<>(rowData));
           }
           if (!headerList.contains("Time")) headerList.add("Time");
           rowData.put(
               "Time",
               new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.US)
                   .format(new Date())
                   .toString());
           // rowData.remove("Time");
           dataSet.add(new HashMap<>(rowData));
           rowData = new HashMap<>();
         }
         break;
       default:
         break;
     }
   }
 }