content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.kafka.clients;
  
  /**
   * The states of a node connection
   *
   * DISCONNECTED: connection has not been successfully established yet
   * CONNECTING: connection is under progress
   * CHECKING_API_VERSIONS: connection has been established and api versions check is in progress. Failure of this check will cause connection to close
   * READY: connection is ready to send requests
   * AUTHENTICATION_FAILED: connection failed due to an authentication error
   */
  public enum ConnectionState {
      DISCONNECTED, CONNECTING, CHECKING_API_VERSIONS, READY, AUTHENTICATION_FAILED;
  
      public boolean isDisconnected() {
          return this == AUTHENTICATION_FAILED || this == DISCONNECTED;
      }
  
      public boolean isConnected() {
          return this == CHECKING_API_VERSIONS || this == READY;
      }
  }
  