ConsistencyLevel.java

/*
 * Copyright 2015 Edward Capriolo
 *
 * 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.teknek.nibiru;

public enum ConsistencyLevel {

  /**
   * N replicas must respond before Timeout
   */
  N,
  /**
   * Implies that the master (source of truth) is where this must execute
   */
  MASTER,
  /**
   * Implies a slave (potentially out of sync) should be used to services this request
   */
  SLAVE,
  /**
   * Implies quorum of servers must respond in aggrrement before acknowledgement
   */
  QUORUM,
  /**
   * A quorum in the local datacenter
   */
  LOCAL_QUORUM,
  /**
   * All replicas must ack the request
   */
  ALL,
  /**
   * write only
   */
  ANY, SERIAL,
  /**
   * Do whatever the backend prefers or implies
   */
  IMPLIED,
  /**
   * //Implies a consistency level > one and some timeline of how long before accepting partial
   * results
   */
  DEADLINE,
  /**
   * write may be buffered into volatile storage and potentially lost
   */
  UNSAFE

}