JavaExecutor.java

/*
 * This file is part of Waarp Project (named also Waarp or GG).
 *
 *  Copyright (c) 2019, Waarp SAS, and individual contributors by the @author
 *  tags. See the COPYRIGHT.txt in the distribution for a full listing of
 * individual contributors.
 *
 *  All Waarp Project is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * Waarp is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with
 * Waarp . If not, see <http://www.gnu.org/licenses/>.
 */
package org.waarp.gateway.ftp.exec;

import org.waarp.common.command.exception.CommandAbstractException;
import org.waarp.common.command.exception.Reply421Exception;
import org.waarp.common.exception.InvalidArgumentException;
import org.waarp.common.future.WaarpFuture;
import org.waarp.common.logging.SysErrLogger;
import org.waarp.common.logging.WaarpLogger;
import org.waarp.common.logging.WaarpLoggerFactory;
import org.waarp.common.utility.ParametersChecker;
import org.waarp.common.utility.WaarpSystemUtil;
import org.waarp.common.utility.WaarpThreadFactory;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

/**
 *
 */
public class JavaExecutor extends AbstractExecutor {
  /**
   * Internal Logger
   */
  private static final WaarpLogger logger =
      WaarpLoggerFactory.getLogger(JavaExecutor.class);
  private final String[] args;
  private final WaarpFuture futureCompletion;
  private final long delay;

  /**
   * @param command
   * @param delay
   * @param futureCompletion
   */
  public JavaExecutor(final String command, final long delay,
                      final WaarpFuture futureCompletion) {
    args = BLANK.split(command);
    this.futureCompletion = futureCompletion;
    this.delay = delay;
  }

  @Override
  public final void run() throws CommandAbstractException {
    final String className = args[0];
    try {
      ParametersChecker.checkSanityString(className);
    } catch (final InvalidArgumentException e) {
      SysErrLogger.FAKE_LOGGER.ignoreLog(e);
      logger.error(
          "Status: " + e.getMessage() + "\n\t Exec in error with " + className);
      throw new Reply421Exception("Pre Exec command is not correctly executed");
    }
    final GatewayRunnable runnable;
    try {
      runnable =
          (GatewayRunnable) WaarpSystemUtil.newInstance(className);//NOSONAR
    } catch (final Exception e) {
      logger.error("ExecJava command is not available: " + className + ": {}",
                   e.getMessage());
      throw new Reply421Exception("Pre Exec command is not executable");
    }
    runnable.setArgs(true, useLocalExec, (int) delay, args);
    logger.debug("{} {}", className, runnable.getClass().getName());
    int status = -1;
    if (delay <= 0) {
      runnable.run();
      status = runnable.getFinalStatus();
    } else {
      final ExecutorService executorService = Executors.newSingleThreadExecutor(
          new WaarpThreadFactory("JavaExecutor"));
      executorService.execute(runnable);
      try {
        Thread.yield();
        executorService.shutdown();
        if (delay > 100) {
          if (!executorService.awaitTermination(delay, TimeUnit.MILLISECONDS)) {
            executorService.shutdownNow();
            logger.error("Exec is in Time Out");
            status = -1;
          } else {
            status = runnable.getFinalStatus();
          }
        } else {
          while (!executorService.awaitTermination(30, TimeUnit.SECONDS)) {
            // nothing
          }
          status = runnable.getFinalStatus();
        }
      } catch (final InterruptedException e) {//NOSONAR
        SysErrLogger.FAKE_LOGGER.ignoreLog(e);
        logger.error("Status: " + e.getMessage() + "\n\t Exec in error with " +
                     runnable);
        throw new Reply421Exception(
            "Pre Exec command is not correctly executed");
      }
    }
    if (status == 0) {
      futureCompletion.setSuccess();
      logger.info("Exec OK with {}", runnable);
    } else if (status == 1) {
      logger.warn("Exec in warning with " + runnable);
      futureCompletion.setSuccess();
    } else {
      logger.error("Status: " + status + " Exec in error with " + runnable);
      throw new Reply421Exception("Pre command executed in error");
    }
  }

}