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 com.datastax.oss.driver.api.core.retry;
  
  import static com.datastax.oss.driver.api.core.ConsistencyLevel.EACH_QUORUM;
  import static com.datastax.oss.driver.api.core.ConsistencyLevel.ONE;
  import static com.datastax.oss.driver.api.core.ConsistencyLevel.QUORUM;
  import static com.datastax.oss.driver.api.core.ConsistencyLevel.SERIAL;
  import static com.datastax.oss.driver.api.core.ConsistencyLevel.THREE;
  import static com.datastax.oss.driver.api.core.ConsistencyLevel.TWO;
  import static com.datastax.oss.driver.api.core.retry.RetryDecision.IGNORE;
  import static com.datastax.oss.driver.api.core.retry.RetryDecision.RETHROW;
  import static com.datastax.oss.driver.api.core.retry.RetryDecision.RETRY_NEXT;
  import static com.datastax.oss.driver.api.core.retry.RetryDecision.RETRY_SAME;
  import static com.datastax.oss.driver.api.core.servererrors.WriteType.BATCH;
  import static com.datastax.oss.driver.api.core.servererrors.WriteType.BATCH_LOG;
  import static com.datastax.oss.driver.api.core.servererrors.WriteType.CAS;
  import static com.datastax.oss.driver.api.core.servererrors.WriteType.CDC;
  import static com.datastax.oss.driver.api.core.servererrors.WriteType.COUNTER;
  import static com.datastax.oss.driver.api.core.servererrors.WriteType.SIMPLE;
  import static com.datastax.oss.driver.api.core.servererrors.WriteType.UNLOGGED_BATCH;
  import static com.datastax.oss.driver.api.core.servererrors.WriteType.VIEW;
  
  import com.datastax.oss.driver.api.core.connection.ClosedConnectionException;
  import com.datastax.oss.driver.api.core.connection.HeartbeatException;
  import com.datastax.oss.driver.api.core.servererrors.OverloadedException;
  import com.datastax.oss.driver.api.core.servererrors.ReadFailureException;
  import com.datastax.oss.driver.api.core.servererrors.ServerError;
  import com.datastax.oss.driver.api.core.servererrors.TruncateException;
  import com.datastax.oss.driver.api.core.servererrors.WriteFailureException;
  import com.datastax.oss.driver.internal.core.retry.ConsistencyDowngradingRetryPolicy;
  import org.junit.Test;
  
  public class ConsistencyDowngradingRetryPolicyTest extends RetryPolicyTestBase {
  
    public ConsistencyDowngradingRetryPolicyTest() {
      super(new ConsistencyDowngradingRetryPolicy("test"));
    }
  
    @Test
    public void should_process_read_timeouts() {
      // retry count != 0
      assertOnReadTimeout(QUORUM, 2, 2, false, 1).hasDecision(RETHROW);
      // serial CL
      assertOnReadTimeout(SERIAL, 2, 2, false, 0).hasDecision(RETHROW);
      // received < blockFor
      assertOnReadTimeout(QUORUM, 4, 3, true, 0).hasDecision(RETRY_SAME).hasConsistency(THREE);
      assertOnReadTimeout(QUORUM, 4, 3, false, 0).hasDecision(RETRY_SAME).hasConsistency(THREE);
      assertOnReadTimeout(QUORUM, 3, 2, true, 0).hasDecision(RETRY_SAME).hasConsistency(TWO);
      assertOnReadTimeout(QUORUM, 3, 2, false, 0).hasDecision(RETRY_SAME).hasConsistency(TWO);
      assertOnReadTimeout(QUORUM, 2, 1, true, 0).hasDecision(RETRY_SAME).hasConsistency(ONE);
      assertOnReadTimeout(QUORUM, 2, 1, false, 0).hasDecision(RETRY_SAME).hasConsistency(ONE);
      assertOnReadTimeout(EACH_QUORUM, 2, 0, true, 0).hasDecision(RETRY_SAME).hasConsistency(ONE);
      assertOnReadTimeout(EACH_QUORUM, 2, 0, false, 0).hasDecision(RETRY_SAME).hasConsistency(ONE);
      assertOnReadTimeout(QUORUM, 2, 0, true, 0).hasDecision(RETHROW);
      assertOnReadTimeout(QUORUM, 2, 0, false, 0).hasDecision(RETHROW);
      // data present
      assertOnReadTimeout(QUORUM, 2, 2, false, 0).hasDecision(RETRY_SAME);
      assertOnReadTimeout(QUORUM, 2, 2, true, 0).hasDecision(RETHROW);
    }
  
    @Test
    public void should_process_write_timeouts() {
      // retry count != 0
      assertOnWriteTimeout(QUORUM, BATCH_LOG, 2, 0, 1).hasDecision(RETHROW);
      // SIMPLE
      assertOnWriteTimeout(QUORUM, SIMPLE, 2, 1, 0).hasDecision(IGNORE);
      assertOnWriteTimeout(QUORUM, SIMPLE, 2, 0, 0).hasDecision(RETHROW);
      // BATCH
      assertOnWriteTimeout(QUORUM, BATCH, 2, 1, 0).hasDecision(IGNORE);
      assertOnWriteTimeout(QUORUM, BATCH, 2, 0, 0).hasDecision(RETHROW);
      // UNLOGGED_BATCH
      assertOnWriteTimeout(QUORUM, UNLOGGED_BATCH, 4, 3, 0)
          .hasDecision(RETRY_SAME)
          .hasConsistency(THREE);
      assertOnWriteTimeout(QUORUM, UNLOGGED_BATCH, 3, 2, 0)
          .hasDecision(RETRY_SAME)
          .hasConsistency(TWO);
      assertOnWriteTimeout(QUORUM, UNLOGGED_BATCH, 2, 1, 0)
          .hasDecision(RETRY_SAME)
          .hasConsistency(ONE);
      assertOnWriteTimeout(EACH_QUORUM, UNLOGGED_BATCH, 2, 0, 0)
          .hasDecision(RETRY_SAME)
          .hasConsistency(ONE);
      assertOnWriteTimeout(QUORUM, UNLOGGED_BATCH, 2, 0, 0).hasDecision(RETHROW);
      // BATCH_LOG
      assertOnWriteTimeout(QUORUM, BATCH_LOG, 2, 1, 0).hasDecision(RETRY_SAME);
      // others
      assertOnWriteTimeout(QUORUM, COUNTER, 2, 1, 0).hasDecision(RETHROW);
      assertOnWriteTimeout(QUORUM, CAS, 2, 1, 0).hasDecision(RETHROW);
      assertOnWriteTimeout(QUORUM, VIEW, 2, 1, 0).hasDecision(RETHROW);
      assertOnWriteTimeout(QUORUM, CDC, 2, 1, 0).hasDecision(RETHROW);
    }
  
    @Test
    public void should_process_unavailable() {
      // retry count != 0
      assertOnUnavailable(QUORUM, 2, 1, 1).hasDecision(RETHROW);
      // SERIAL
      assertOnUnavailable(SERIAL, 2, 1, 0).hasDecision(RETRY_NEXT);
      // downgrade
      assertOnUnavailable(QUORUM, 4, 3, 0).hasDecision(RETRY_SAME).hasConsistency(THREE);
      assertOnUnavailable(QUORUM, 3, 2, 0).hasDecision(RETRY_SAME).hasConsistency(TWO);
      assertOnUnavailable(QUORUM, 2, 1, 0).hasDecision(RETRY_SAME).hasConsistency(ONE);
      assertOnUnavailable(EACH_QUORUM, 2, 0, 0).hasDecision(RETRY_SAME).hasConsistency(ONE);
      assertOnUnavailable(QUORUM, 2, 0, 0).hasDecision(RETHROW);
    }
  
    @Test
    public void should_process_aborted_request() {
      assertOnRequestAborted(ClosedConnectionException.class, 0).hasDecision(RETRY_NEXT);
      assertOnRequestAborted(ClosedConnectionException.class, 1).hasDecision(RETRY_NEXT);
      assertOnRequestAborted(HeartbeatException.class, 0).hasDecision(RETRY_NEXT);
      assertOnRequestAborted(HeartbeatException.class, 1).hasDecision(RETRY_NEXT);
      assertOnRequestAborted(Throwable.class, 0).hasDecision(RETHROW);
    }
  
    @Test
    public void should_process_error_response() {
      assertOnErrorResponse(ReadFailureException.class, 0).hasDecision(RETHROW);
      assertOnErrorResponse(ReadFailureException.class, 1).hasDecision(RETHROW);
      assertOnErrorResponse(WriteFailureException.class, 0).hasDecision(RETHROW);
      assertOnErrorResponse(WriteFailureException.class, 1).hasDecision(RETHROW);
      assertOnErrorResponse(WriteFailureException.class, 1).hasDecision(RETHROW);
  
      assertOnErrorResponse(OverloadedException.class, 0).hasDecision(RETRY_NEXT);
      assertOnErrorResponse(OverloadedException.class, 1).hasDecision(RETRY_NEXT);
      assertOnErrorResponse(ServerError.class, 0).hasDecision(RETRY_NEXT);
      assertOnErrorResponse(ServerError.class, 1).hasDecision(RETRY_NEXT);
      assertOnErrorResponse(TruncateException.class, 0).hasDecision(RETRY_NEXT);
      assertOnErrorResponse(TruncateException.class, 1).hasDecision(RETRY_NEXT);
    }
  }
  