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 harry.model.sut;
  
  import java.util.concurrent.CompletableFuture;
  import java.util.regex.Pattern;
  
  public class DoubleWritingSut implements SystemUnderTest
  {
      private final SystemUnderTest primary;
      private final SystemUnderTest secondary;
  
      public DoubleWritingSut(SystemUnderTest primary,
                              SystemUnderTest secondary)
      {
          this.primary = primary;
          this.secondary = secondary;
      }
      public boolean isShutdown()
      {
          return primary.isShutdown();
      }
  
      public void shutdown()
      {
          primary.shutdown();
      }
  
      private static final Pattern pattern = Pattern.compile("^select", Pattern.CASE_INSENSITIVE);
  
      public Object[][] execute(String statement, ConsistencyLevel cl, Object... bindings)
      {
          if (pattern.matcher(statement).find())
              return primary.execute(statement, cl, bindings);
  
          secondary.execute(statement, cl, bindings);
          return primary.execute(statement, cl, bindings);
      }
  
      public CompletableFuture<Object[][]> executeAsync(String statement, ConsistencyLevel cl, Object... bindings)
      {
          throw new UnsupportedOperationException("Not implemented (yet)");
      }
  }
  