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.chinook;
  
  import org.apache.calcite.avatica.Meta;
  import org.apache.calcite.avatica.jdbc.JdbcMeta;
  import org.apache.calcite.avatica.remote.Driver;
  import org.apache.calcite.avatica.server.AvaticaProtobufHandler;
  import org.apache.calcite.avatica.server.HttpServer;
  import org.apache.calcite.avatica.server.Main;
  
  import net.hydromatic.chinook.data.hsqldb.ChinookHsqldb;
  
  import java.io.IOException;
  import java.sql.SQLException;
  import java.util.List;
  
  /**
   * Wrapping Calcite engine with Avatica tansport for testing JDBC capabilities
   * between Avatica JDBC transport and Calcite.
   */
  public class ChinookAvaticaServer {
    private HttpServer server;
  
    public void startWithCalcite() throws Exception {
      final String[] args = {CalciteChinookMetaFactory.class.getName()};
      this.server = Main.start(args, 0, AvaticaProtobufHandler::new);
    }
  
    public void startWithRaw() throws Exception {
      final String[] args = {RawChinookMetaFactory.class.getName()};
      this.server = Main.start(args, 0, AvaticaProtobufHandler::new);
    }
  
    public String getURL() {
      return "jdbc:avatica:remote:url=http://localhost:" + server.getPort()
          + ";serialization=" + Driver.Serialization.PROTOBUF.name();
    }
  
    public void stop() {
      server.stop();
    }
  
    /**
     * Factory for Chinook Calcite database wrapped in meta for Avatica.
     */
    public static class CalciteChinookMetaFactory implements Meta.Factory {
      private static final CalciteConnectionProvider CONNECTION_PROVIDER =
          new CalciteConnectionProvider();
  
      private static volatile JdbcMeta instance = null;
  
      private static JdbcMeta getInstance() {
        if (instance == null) {
          synchronized (CalciteChinookMetaFactory.class) {
            try {
              instance =
                  new JdbcMeta(CalciteConnectionProvider.DRIVER_URL,
                      CONNECTION_PROVIDER.provideConnectionInfo());
            } catch (SQLException | IOException e) {
              throw new RuntimeException(e);
            }
          }
        }
        return instance;
      }
  
      @Override public Meta create(List<String> args) {
        return getInstance();
      }
    }
  
    /**
     * Factory for Chinook Calcite database wrapped in meta for Avatica.
     */
    public static class RawChinookMetaFactory implements Meta.Factory {
      private static volatile JdbcMeta instance = null;
  
      private static JdbcMeta getInstance() {
        if (instance == null) {
          synchronized (RawChinookMetaFactory.class) {
            if (instance == null) {
              try {
                instance =
                    new JdbcMeta(ChinookHsqldb.URI, ChinookHsqldb.USER, ChinookHsqldb.PASSWORD);
              } catch (SQLException e) {
                throw new RuntimeException(e);
              }
            }
          }
        }
        return instance;
      }
  
      @Override public Meta create(List<String> args) {
        return getInstance();
      }
    }
  }
  