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
   *
   *    https://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.bigtop.manager.stack.core.executor;
  
  import org.apache.bigtop.manager.common.constants.MessageConstants;
  import org.apache.bigtop.manager.common.enums.Command;
  import org.apache.bigtop.manager.common.shell.ShellResult;
  import org.apache.bigtop.manager.common.utils.CaseUtils;
  import org.apache.bigtop.manager.common.utils.Environments;
  import org.apache.bigtop.manager.grpc.payload.ComponentCommandPayload;
  import org.apache.bigtop.manager.stack.core.exception.StackException;
  import org.apache.bigtop.manager.stack.core.spi.PrioritySPIFactory;
  import org.apache.bigtop.manager.stack.core.spi.hook.Hook;
  import org.apache.bigtop.manager.stack.core.spi.param.Params;
  import org.apache.bigtop.manager.stack.core.spi.script.Script;
  
  import lombok.extern.slf4j.Slf4j;
  
  import java.lang.reflect.Method;
  import java.util.Map;
  
  @Slf4j
  public class StackExecutor {
  
      private static final Map<String, Script> SCRIPT_MAP = new PrioritySPIFactory<>(Script.class).getSPIMap();
  
      private static final Map<String, Params> PARAMS_MAP = new PrioritySPIFactory<>(Params.class).getSPIMap();
  
      private static final Map<String, Hook> HOOK_MAP = new PrioritySPIFactory<>(Hook.class).getSPIMap();
  
      private static Script getCommandScript(ComponentCommandPayload payload) {
          String componentName = payload.getComponentName();
          Script script = SCRIPT_MAP.get(componentName);
          if (script == null) {
              throw new StackException("Cannot find script for component: {0}", componentName);
          }
  
          return script;
      }
  
      private static void runBeforeHook(String command, Params params) {
          Hook hook = HOOK_MAP.get(command.toLowerCase());
          if (hook != null) {
              hook.before(params);
          }
      }
  
      private static void runAfterHook(String command, Params params) {
          Hook hook = HOOK_MAP.get(command.toLowerCase());
          if (hook != null) {
              hook.after(params);
          }
      }
  
      public static ShellResult execute(ComponentCommandPayload payload) {
          try {
              String command = payload.getCommand().equalsIgnoreCase(Command.CUSTOM.getCode())
                      ? payload.getCustomCommand()
                      : payload.getCommand();
              Script script = getCommandScript(payload);
  
              String methodName = CaseUtils.toCamelCase(command, CaseUtils.SEPARATOR_UNDERSCORE, false);
              Method method = script.getClass().getMethod(methodName, Params.class);
  
              Params params = PARAMS_MAP
                      .get(payload.getServiceName())
                      .getClass()
                      .getDeclaredConstructor(ComponentCommandPayload.class)
                      .newInstance(payload);
              params.initGlobalParams();
              if (Environments.isDevMode()) {
                  log.info("Executing {}::{} on dev mode", script.getName(), method.getName());
                  return ShellResult.success();
              } else {
                  runBeforeHook(command, params);
  
                  log.info("Executing {}::{}", script.getName(), method.getName());
                  ShellResult result = (ShellResult) method.invoke(script, params);
                  if (result.getExitCode() != MessageConstants.SUCCESS_CODE) {
                      log.error("Error executing script: {}", result.getErrMsg());
                  }
  
                  runAfterHook(command, params);
  
                  return result;
              }
          } catch (Exception e) {
              log.error("Error executing command, payload: {}", payload, e);
              return ShellResult.fail();
          }
      }
  }
  