Remove deprecated connection pool-event related classes/methods

* ConnectionPoolOpenedEvent
* ConnectionAddedEvent
* ConnectionRemovedEvent
* ConnectionPoolListener#connectionPoolOpened
* ConnectionPoolListener#connectionAdded
* ConnectionPoolListener#connectionRemoved

JAVA-5151

Author: jyemin

driver-core/src/main/com/mongodb/event/ConnectionAddedEvent.java

@@ -24,18 +24,6 @@
  * @since 3.5
  */
 public interface ConnectionPoolListener extends EventListener {
-    /**
-     * Invoked when a connection pool is opened. The default implementation does nothing.
-     *
-     * @param event the event
-     * @deprecated Prefer {@link #connectionPoolCreated} Implementations should NOT implement this method at all, instead relying on
-     * the default no-op implementation. If an application implements both this method and connectionPoolCreated, the application risks
-     * double-counting events.
-     */
-    @Deprecated
-    default void connectionPoolOpened(ConnectionPoolOpenedEvent event) {
-    }
-
     /**
      * Invoked when a connection pool is created. The default implementation does nothing.
      *
@@ -105,18 +93,6 @@ default void connectionCheckOutFailed(ConnectionCheckOutFailedEvent event) {
     default void connectionCheckedIn(ConnectionCheckedInEvent event) {
     }
 
-    /**
-     * Invoked when a connection is added to a pool. The default implementation does nothing.
-     *
-     * @param event the event
-     * @deprecated Prefer {@link #connectionCreated} Implementations should NOT implement this method at all, instead relying on
-     * the default no-op implementation. If an application implements both this method and connectionCreated, the application risks
-     * double-counting events.
-     */
-    @Deprecated
-    default void connectionAdded(ConnectionAddedEvent event) {
-    }
-
     /**
      * Invoked when a connection is created. The default implementation does nothing.
      *
@@ -135,18 +111,6 @@ default void connectionCreated(ConnectionCreatedEvent event) {
     default void connectionReady(ConnectionReadyEvent event) {
     }
 
-    /**
-     * Invoked when a connection is removed from a pool. The default implementation does nothing.
-     *
-     * @param event the event
-     * @deprecated Prefer {@link #connectionClosed} Implementations should NOT implement this method at all, instead relying on
-     * the default no-op implementation. If an application implements both this method and connectionClosed, the application risks
-     * double-counting events.
-     */
-    @Deprecated
-    default void connectionRemoved(ConnectionRemovedEvent event) {
-    }
-
     /**
      * Invoked when a connection is removed from a pool. The default implementation does nothing.
      *

driver-core/src/main/com/mongodb/event/ConnectionPoolListener.java

@@ -498,14 +498,13 @@ private void connectionPoolCreated(final ConnectionPoolListener connectionPoolLi
             logMessage("Connection pool created", clusterId, message, entries);
         }
         connectionPoolListener.connectionPoolCreated(new ConnectionPoolCreatedEvent(serverId, settings));
-        connectionPoolListener.connectionPoolOpened(new com.mongodb.event.ConnectionPoolOpenedEvent(serverId, settings));
     }
 
     /**
      * Send both current and deprecated events in order to preserve backwards compatibility.
      * Must not throw {@link Exception}s.
      *
-     * @return A {@link TimePoint} after executing {@link ConnectionPoolListener#connectionAdded(com.mongodb.event.ConnectionAddedEvent)},
+     * @return A {@link TimePoint} after executing {@link ConnectionPoolListener#connectionCreated(ConnectionCreatedEvent)},
      * {@link ConnectionPoolListener#connectionCreated(ConnectionCreatedEvent)}.
      * This order is required by
      * <a href="https://github.com/mongodb/specifications/blob/master/source/connection-monitoring-and-pooling/connection-monitoring-and-pooling.rst#events">CMAP</a>
@@ -516,7 +515,6 @@ private TimePoint connectionCreated(final ConnectionPoolListener connectionPoolL
                 "Connection created: address={}:{}, driver-generated ID={}",
                 connectionId.getLocalValue());
 
-        connectionPoolListener.connectionAdded(new com.mongodb.event.ConnectionAddedEvent(connectionId));
         connectionPoolListener.connectionCreated(new ConnectionCreatedEvent(connectionId));
         return TimePoint.now();
     }
@@ -541,7 +539,6 @@ private void connectionClosed(final ConnectionPoolListener connectionPoolListene
                     "Connection closed: address={}:{}, driver-generated ID={}. Reason: {}.[ Error: {}]",
                     entries);
         }
-        connectionPoolListener.connectionRemoved(new com.mongodb.event.ConnectionRemovedEvent(connectionId, getReasonForRemoved(reason)));
         connectionPoolListener.connectionClosed(new ConnectionClosedEvent(connectionId, reason));
     }
 
@@ -577,27 +574,6 @@ private TimePoint connectionCheckoutStarted(final OperationContext operationCont
         return TimePoint.now();
     }
 
-    private com.mongodb.event.ConnectionRemovedEvent.Reason getReasonForRemoved(final ConnectionClosedEvent.Reason reason) {
-        com.mongodb.event.ConnectionRemovedEvent.Reason removedReason = com.mongodb.event.ConnectionRemovedEvent.Reason.UNKNOWN;
-        switch (reason) {
-            case STALE:
-                removedReason = com.mongodb.event.ConnectionRemovedEvent.Reason.STALE;
-                break;
-            case IDLE:
-                removedReason = com.mongodb.event.ConnectionRemovedEvent.Reason.MAX_IDLE_TIME_EXCEEDED;
-                break;
-            case ERROR:
-                removedReason = com.mongodb.event.ConnectionRemovedEvent.Reason.ERROR;
-                break;
-            case POOL_CLOSED:
-                removedReason = com.mongodb.event.ConnectionRemovedEvent.Reason.POOL_CLOSED;
-                break;
-            default:
-                break;
-        }
-        return removedReason;
-    }
-
     /**
      * Must not throw {@link Exception}s.
      */