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.cassandra.stress;
  
  import java.io.IOException;
  
  import org.apache.cassandra.stress.report.Timer;
  import org.apache.cassandra.stress.settings.SettingsLog;
  import org.apache.cassandra.stress.settings.StressSettings;
  import org.apache.cassandra.stress.util.JavaDriverClient;
  import org.apache.cassandra.transport.SimpleClient;
  
  public abstract class Operation
  {
      public final StressSettings settings;
      private final Timer timer;
  
      public Operation(Timer timer, StressSettings settings)
      {
          this.timer = timer;
          this.settings = settings;
      }
  
      public static interface RunOp
      {
          public boolean run() throws Exception;
          public int partitionCount();
          public int rowCount();
      }
  
      public abstract int ready(WorkManager permits);
  
      public boolean isWrite()
      {
          return false;
      }
  
      public void run(SimpleClient client) throws IOException
      {
          throw new UnsupportedOperationException();
      }
  
      public void run(JavaDriverClient client) throws IOException
      {
          throw new UnsupportedOperationException();
      }
  
      public final void timeWithRetry(RunOp run) throws IOException
      {
          timer.start();
  
          boolean success = false;
          String exceptionMessage = null;
  
          int tries = 0;
          for (; tries < settings.errors.tries; tries++)
          {
              try
              {
                  success = run.run();
                  break;
              }
              catch (Exception e)
              {
                  switch (settings.log.level)
                  {
                      case MINIMAL:
                          break;
  
                      case NORMAL:
                          System.err.println(e);
                          break;
  
                      case VERBOSE:
                          e.printStackTrace(System.err);
                          break;
  
                      default:
                          throw new AssertionError();
                  }
                  exceptionMessage = getExceptionMessage(e);
              }
          }
  
          timer.stop(run.partitionCount(), run.rowCount(), !success);
  
          if (!success)
          {
              error(String.format("Operation x%d on key(s) %s: %s%n",
                      tries,
                      key(),
                      (exceptionMessage == null)
                          ? "Data returned was not validated"
                          : "Error executing: " + exceptionMessage));
          }
  
      }
  
      public abstract String key();
  
      protected String getExceptionMessage(Exception e)
      {
          String className = e.getClass().getSimpleName();
          String message = e.getMessage();
          return (message == null) ? "(" + className + ")" : String.format("(%s): %s", className, message);
      }
  
      protected void error(String message) throws IOException
      {
          if (!settings.errors.ignore)
              throw new IOException(message);
          else if (settings.log.level.compareTo(SettingsLog.Level.MINIMAL) > 0)
              System.err.println(message);
      }
  
      public void intendedStartNs(long intendedTime)
      {
          timer.intendedTimeNs(intendedTime);
      }
  }
  