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.ambari.server.serveraction.users;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.ConcurrentMap;
  
  import jakarta.inject.Inject;
  import jakarta.inject.Singleton;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.actionmanager.HostRoleStatus;
  import org.apache.ambari.server.agent.CommandReport;
  import org.apache.ambari.server.hooks.users.UserHookParams;
  import org.apache.ambari.server.serveraction.AbstractServerAction;
  import org.apache.ambari.server.utils.ShellCommandUtil;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.google.common.base.Splitter;
  
  @Singleton
  public class PostUserCreationHookServerAction extends AbstractServerAction {
    private static final Logger LOGGER = LoggerFactory.getLogger(PostUserCreationHookServerAction.class);
    private static final int MAX_SYMBOLS_PER_LOG_MESSAGE = 7900;
  
    @Inject
    private ShellCommandUtilityWrapper shellCommandUtilityWrapper;
  
    @Inject
    private ObjectMapper objectMapper;
  
    @Inject
    private CollectionPersisterServiceFactory collectionPersisterServiceFactory;
  
    @Inject
    public PostUserCreationHookServerAction() {
      super();
    }
  
    @Override
    public CommandReport execute(ConcurrentMap<String, Object> requestSharedDataContext) throws AmbariException, InterruptedException {
      LOGGER.debug("Executing custom script server action; Context: {}", requestSharedDataContext);
      ShellCommandUtil.Result result = null;
      CommandReport cmdReport = null;
  
      try {
  
        Map<String, String> commandParams = getCommandParameters();
        validateCommandParams(commandParams);
  
        //persist user data to csv
        CollectionPersisterService<String, List<String>> csvPersisterService = collectionPersisterServiceFactory.createCsvFilePersisterService(commandParams.get(UserHookParams.CMD_INPUT_FILE.param()));
        csvPersisterService.persistMap(getPayload(commandParams));
  
        String[] cmd = assembleCommand(commandParams);
  
        result = shellCommandUtilityWrapper.runCommand(cmd);
  
        // long command results need to be split to chunks to feed external log processors (eg.: syslog)
        logCommandResult(Arrays.asList(cmd).toString(), result);
  
        cmdReport = createCommandReport(result.getExitCode(), result.isSuccessful() ?
            HostRoleStatus.COMPLETED : HostRoleStatus.FAILED, "{}", result.getStdout(), result.getStderr());
  
        LOGGER.debug("Command report: {}", cmdReport);
  
  
      } catch (InterruptedException e) {
        LOGGER.error("The server action thread has been interrupted", e);
        throw e;
      } catch (Exception e) {
        LOGGER.error("Server action is about to quit due to an exception.", e);
        throw new AmbariException("Server action execution failed to complete!", e);
      }
  
      return cmdReport;
    }
  
    private void logCommandResult(String command, ShellCommandUtil.Result result) {
      LOGGER.info("Execution of command [ {} ] - {}", command, result.isSuccessful() ? "succeeded" : "failed");
      String stringToLog = result.isSuccessful() ? result.getStdout() : result.getStderr();
      if (stringToLog == null) stringToLog = "";
      List<String> logLines = Splitter.fixedLength(MAX_SYMBOLS_PER_LOG_MESSAGE).splitToList(stringToLog);
      LOGGER.info("BEGIN - {} for command {}", result.isSuccessful() ? "stdout" : "stderr", command);
      for (String line : logLines) {
        LOGGER.info("command output *** : {}", line);
      }
      LOGGER.info("END - {} for command {}", result.isSuccessful() ? "stdout" : "stderr", command);
    }
  
  
    private String[] assembleCommand(Map<String, String> params) {
      String[] cmdArray = new String[]{
          params.get(UserHookParams.SCRIPT.param()),
          params.get(UserHookParams.CMD_INPUT_FILE.param()),
          params.get(UserHookParams.CLUSTER_SECURITY_TYPE.param()),
          params.get(UserHookParams.CMD_HDFS_PRINCIPAL.param()),
          params.get(UserHookParams.CMD_HDFS_KEYTAB.param()),
          params.get(UserHookParams.CMD_HDFS_USER.param())
      };
      LOGGER.debug("Server action command to be executed: {}", cmdArray);
      return cmdArray;
    }
  
    /**
     * Validates command parameters, throws exception in case required parameters are missing
     */
    private void validateCommandParams(Map<String, String> commandParams) {
  
      LOGGER.info("Validating command parameters ...");
  
      if (!commandParams.containsKey(UserHookParams.PAYLOAD.param())) {
        LOGGER.error("Missing command parameter: {}; Failing the server action.", UserHookParams.PAYLOAD.param());
        throw new IllegalArgumentException("Missing command parameter: [" + UserHookParams.PAYLOAD.param() + "]");
      }
  
      if (!commandParams.containsKey(UserHookParams.SCRIPT.param())) {
        LOGGER.error("Missing command parameter: {}; Failing the server action.", UserHookParams.SCRIPT.param());
        throw new IllegalArgumentException("Missing command parameter: [" + UserHookParams.SCRIPT.param() + "]");
      }
  
      if (!commandParams.containsKey(UserHookParams.CMD_INPUT_FILE.param())) {
        LOGGER.error("Missing command parameter: {}; Failing the server action.", UserHookParams.CMD_INPUT_FILE.param());
        throw new IllegalArgumentException("Missing command parameter: [" + UserHookParams.CMD_INPUT_FILE.param() + "]");
      }
  
      if (!commandParams.containsKey(UserHookParams.CLUSTER_SECURITY_TYPE.param())) {
        LOGGER.error("Missing command parameter: {}; Failing the server action.", UserHookParams.CLUSTER_SECURITY_TYPE.param());
        throw new IllegalArgumentException("Missing command parameter: [" + UserHookParams.CLUSTER_SECURITY_TYPE.param() + "]");
      }
  
      if (!commandParams.containsKey(UserHookParams.CMD_HDFS_USER.param())) {
        LOGGER.error("Missing command parameter: {}; Failing the server action.", UserHookParams.CMD_HDFS_USER.param());
        throw new IllegalArgumentException("Missing command parameter: [" + UserHookParams.CMD_HDFS_USER.param() + "]");
      }
  
      LOGGER.info("Command parameter validation passed.");
    }
  
    private Map<String, List<String>> getPayload(Map<String, String> commandParams) throws IOException {
      Map<String, List<String>> payload = objectMapper.readValue(commandParams.get(UserHookParams.PAYLOAD.param()), Map.class);
      return payload;
    }
  
  }
  