/*
    * 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.shardingsphere.infra.executor.sql.execute.engine.raw.callback;
  
  import com.google.common.base.Preconditions;
  import org.apache.shardingsphere.infra.executor.kernel.model.ExecutorCallback;
  import org.apache.shardingsphere.infra.executor.sql.execute.engine.raw.RawSQLExecutionUnit;
  import org.apache.shardingsphere.infra.executor.sql.execute.result.ExecuteResult;
  import org.apache.shardingsphere.infra.executor.sql.process.ProcessEngine;
  import org.apache.shardingsphere.infra.spi.ShardingSphereServiceLoader;
  
  import java.sql.SQLException;
  import java.util.Collection;
  
  /**
   * Raw SQL executor callback.
   */
  public final class RawSQLExecutorCallback implements ExecutorCallback<RawSQLExecutionUnit, ExecuteResult> {
      
      @SuppressWarnings("rawtypes")
      private final Collection<RawExecutorCallback> callbacks;
      
      private final ProcessEngine processEngine = new ProcessEngine();
      
      public RawSQLExecutorCallback() {
          callbacks = ShardingSphereServiceLoader.getServiceInstances(RawExecutorCallback.class);
          Preconditions.checkState(!callbacks.isEmpty(), "No raw executor callback implementation found.");
      }
      
      @SuppressWarnings("unchecked")
      @Override
      public Collection<ExecuteResult> execute(final Collection<RawSQLExecutionUnit> inputs, final boolean isTrunkThread, final String processId) throws SQLException {
          Collection<ExecuteResult> result = callbacks.iterator().next().execute(inputs, isTrunkThread);
          for (RawSQLExecutionUnit each : inputs) {
              processEngine.completeSQLUnitExecution(each, processId);
          }
          return result;
      }
  }