JavaLaunchTask.java

/*
** Module   : JavaLaunchTask.java
** Abstract : Launcher for java-style tasks.
**
** Copyright (c) 2014-2023, Golden Code Development Corporation.
**
** -#- -I- --Date-- ---------------------------------Description----------------------------------
** 001 CA  20140206 First version.
** 002 TJD 20220504 Java 11 compatibility minor changes
** 003 GBB 20230512 Logging methods replaced by CentralLogger/ConversionStatus.
*/
/*
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU Affero General Public License as
** published by the Free Software Foundation, either version 3 of the
** License, or (at your option) any later version.
**
** This program 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 Affero General Public License for more details.
**
** You may find a copy of the GNU Affero GPL version 3 at the following
** location: https://www.gnu.org/licenses/agpl-3.0.en.html
** 
** Additional terms under GNU Affero GPL version 3 section 7:
** 
**   Under Section 7 of the GNU Affero GPL version 3, the following additional
**   terms apply to the works covered under the License.  These additional terms
**   are non-permissive additional terms allowed under Section 7 of the GNU
**   Affero GPL version 3 and may not be removed by you.
** 
**   0. Attribution Requirement.
** 
**     You must preserve all legal notices or author attributions in the covered
**     work or Appropriate Legal Notices displayed by works containing the covered
**     work.  You may not remove from the covered work any author or developer
**     credit already included within the covered work.
** 
**   1. No License To Use Trademarks.
** 
**     This license does not grant any license or rights to use the trademarks
**     Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
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**     name Golden Code, FWD, or the names of any author or contributor, for
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*/

package com.goldencode.p2j.scheduler;

import java.lang.reflect.*;
import java.util.logging.*;

import com.goldencode.p2j.util.logging.*;

/**
 * Launcher for java-style tasks.
 */
class JavaLaunchTask
implements Runnable
{
   /** Logger. */
   private static final CentralLogger LOG = CentralLogger.get(JavaLaunchTask.class);

   /** The target class. */
   private final String cls;
   
   /** The target method. */
   private final String method;
   
   /**
    * Configure this launcher.
    * 
    * @param    cls
    *           The target class.
    * @param    method
    *           The target method.
    */
   public JavaLaunchTask(String cls, String method)
   {
      this.cls = cls;
      this.method = method;
   }

   /**
    * Invoke the {@link #method} from the specified {@link #cls class}.  If the method is not 
    * static, a new instance of {@link #cls} type will be created.
    */
   @Override
   public void run()
   {
      try
      {
         Class<?> clazz = Class.forName(cls);
         Method mthd = clazz.getMethod(method);
         Object instance = (Modifier.isStatic(mthd.getModifiers())) ? null 
                                                                    : clazz.getDeclaredConstructor().newInstance();
         
         mthd.invoke(instance);
      }
      catch (Exception e)
      {
         if (LOG.isLoggable(Level.SEVERE))
         {
            final String msg = String.format("Could not launch java job %s.%s", cls, method);
            LOG.logp(Level.SEVERE, "JavaLaunchTask", "run", msg);
         }
      }
   }
}