https://github.com/datastax/java-driver/java-driver-core: A driver for Apache Cassandra(R) 2.1+ that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's native protocol versions 3 and above.
  • Various (DataStax) 
/*
 * Copyright DataStax, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.datastax.oss.driver.internal.core.context;

import com.datastax.oss.driver.api.core.session.SessionBuilder;


A component that gets notified of certain events in the session's lifecycle.

This is intended for third-party extensions, no built-in components implement this.

/**
 * A component that gets notified of certain events in the session's lifecycle.
 *
 * <p>This is intended for third-party extensions, no built-in components implement this.
 */
public interface LifecycleListener extends AutoCloseable {

  
Invoked when the session is ready to process user requests.

This corresponds to the moment when the SessionBuilder.build() returns, or the future returned by SessionBuilder.buildAsync() completes. If the session initialization fails, this method will not get called. 
This method is invoked on a driver thread, it should complete relatively quickly and not
block.

/**
   * Invoked when the session is ready to process user requests.
   *
   * <p>This corresponds to the moment when the {@link SessionBuilder#build()} returns, or the
   * future returned by {@link SessionBuilder#buildAsync()} completes. If the session initialization
   * fails, this method will not get called.
   *
   * <p>This method is invoked on a driver thread, it should complete relatively quickly and not
   * block.
   */
  void onSessionReady();

  
Invoked when the session shuts down.

Implementations should perform any necessary cleanup, for example freeing resources or
cancelling scheduled tasks.

Note that this method gets called even if the shutdown results from a failed initialization. In that case, implementations should be ready to handle a call to this method even though onSessionReady() hasn't been invoked. 
This method is invoked on a driver thread, it should complete relatively quickly and not
block.

/**
   * Invoked when the session shuts down.
   *
   * <p>Implementations should perform any necessary cleanup, for example freeing resources or
   * cancelling scheduled tasks.
   *
   * <p>Note that this method gets called even if the shutdown results from a failed initialization.
   * In that case, implementations should be ready to handle a call to this method even though
   * {@link #onSessionReady()} hasn't been invoked.
   *
   * <p>This method is invoked on a driver thread, it should complete relatively quickly and not
   * block.
   */
  @Override
  void close() throws Exception;
}