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.calcite.test.concurrent;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import java.sql.Connection;
  import java.sql.Statement;
  
  /**
   * Used to extend functionality of mtsql.
   */
  public interface ConcurrentTestPluginCommand {
  
    /** Test context. */
    interface TestContext {
      /**
       * Store a message as output for mtsql script.
       *
       * @param message Message to be output
       */
      void storeMessage(String message);
  
      /**
       * Get connection for thread.
       *
       * @return connection for thread
       */
      Connection getConnection();
  
      /**
       * Get current statement for thread, or null if none.
       *
       * @return current statement for thread
       */
      @Nullable Statement getCurrentStatement();
    }
  
    /**
     * Implement this method to extend functionality of mtsql.
     *
     * @param testContext Exposed context for plugin to run in.
     */
    void execute(TestContext testContext);
  }
  