com.datastax.driver.core.exceptions.QueryConsistencyException Maven / Gradle / Ivy

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A driver for Apache Cassandra 1.2+ that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's binary protocol.

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/*
 * 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.driver.core.exceptions;

import com.datastax.driver.core.ConsistencyLevel;
import com.datastax.driver.core.EndPoint;
import java.net.InetAddress;
import java.net.InetSocketAddress;

/**
 * A failure to reach the required consistency level during the execution of a query.
 *
 * Such an exception is returned when the query has been tried by Cassandra but cannot be
 * achieved with the requested consistency level because either:
 *
 * 

 *   the coordinator did not receive enough replica responses within the rpc timeout set for
 *       Cassandra;
 *   
some replicas replied with an error.
 * 
 *
 * .
 */
@SuppressWarnings("serial")
public abstract class QueryConsistencyException extends QueryExecutionException
    implements CoordinatorException {

  private final EndPoint endPoint;
  private final ConsistencyLevel consistency;
  private final int received;
  private final int required;

  protected QueryConsistencyException(
      EndPoint endPoint, String msg, ConsistencyLevel consistency, int received, int required) {
    super(msg);
    this.endPoint = endPoint;
    this.consistency = consistency;
    this.received = received;
    this.required = required;
  }

  protected QueryConsistencyException(
      EndPoint endPoint,
      String msg,
      Throwable cause,
      ConsistencyLevel consistency,
      int received,
      int required) {
    super(msg, cause);
    this.endPoint = endPoint;
    this.consistency = consistency;
    this.received = received;
    this.required = required;
  }

  /**
   * The consistency level of the operation that failed.
   *
   * @return the consistency level of the operation that failed.
   */
  public ConsistencyLevel getConsistencyLevel() {
    return consistency;
  }

  /**
   * The number of replicas that had acknowledged/responded to the operation before it failed.
   *
   * @return the number of replica that had acknowledged/responded the operation before it failed.
   */
  public int getReceivedAcknowledgements() {
    return received;
  }

  /**
   * The minimum number of replica acknowledgements/responses that were required to fulfill the
   * operation.
   *
   * @return The minimum number of replica acknowledgements/response that were required to fulfill
   *     the operation.
   */
  public int getRequiredAcknowledgements() {
    return required;
  }

  /**
   * {@inheritDoc}
   *
   * Note that this is the information of the host that coordinated the query, not the
   * one that timed out.
   */
  @Override
  public EndPoint getEndPoint() {
    return endPoint;
  }

  @Override
  @Deprecated
  public InetSocketAddress getAddress() {
    return (endPoint == null) ? null : endPoint.resolve();
  }

  @Override
  @Deprecated
  public InetAddress getHost() {
    return (endPoint == null) ? null : endPoint.resolve().getAddress();
  }
}