io.fabric8.kubernetes.client.Watcher Maven / Gradle / Ivy

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/**
 * Copyright (C) 2015 Red Hat, 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 io.fabric8.kubernetes.client;

import org.slf4j.LoggerFactory;

public interface Watcher {

  /**
   * If the Watcher can reconnect itself after an error
   * @return
   */
  default boolean reconnecting() {
    return false;
  }

  void eventReceived(Action action, T resource);

  /**
   * Invoked when the watcher is gracefully closed.
   */
  default void onClose() {
    LoggerFactory.getLogger(Watcher.class).debug("Watcher closed");
  }

  /**
   * Invoked when the watcher closes due to an Exception.
   *
   * @param cause What caused the watcher to be closed.
   */
  void onClose(WatcherException cause);

  enum Action {
    ADDED, MODIFIED, DELETED, ERROR, BOOKMARK
  }

}