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[DS-321] DSpace command launcher

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git-svn-id: http://scm.dspace.org/svn/repo/dspace/trunk@4311 9c30dcfa-912a-0410-8fc2-9e0234be79fd
This commit is contained in:
Stuart Lewis
2009-09-30 22:02:09 +00:00
parent d98a94fbcc
commit 2cc0f7ad4d
5 changed files with 511 additions and 0 deletions
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203
dspace-api/src/main/java/org/dspace/app/launcher/ScriptLauncher.java Normal file
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/*
* ScriptLauncher.java
*
* Version: $Revision$
*
* Date: $Date$
*
* Copyright (c) 2002-2009, Duraspace. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Duraspace nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/package org.dspace.app.launcher;
import org.dspace.core.ConfigurationManager;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import java.util.List;
import java.lang.reflect.Method;
/**
* A DSpace script launcher.
*
* @author Stuart Lewis
*/
public class ScriptLauncher
{
/**
* Execute the DSpace script launcher
*
* @param args Any parameters required to be passed to the scripts it executes
* @throws Exception
*/
public static void main(String[] args)
{
// Check that there is at least one argument
if (args.length < 1)
{
System.err.println("You must provide at least one command argument");
display();
System.exit(1);
}
// Parse the configuration file looking for the command entered
Document doc = getConfig();
String request = args[0];
Element root = doc.getRootElement();
List<Element> commands = root.getChildren("command");
for (Element command : commands)
{
if (request.equalsIgnoreCase(command.getChild("name").getValue()))
{
// Run each step
List<Element> steps = command.getChildren("step");
for (Element step : steps)
{
// Instantiate the class
Class target = null;
String className = step.getChild("class").getValue();
try
{
target = Class.forName(className,
true,
Thread.currentThread().getContextClassLoader());
}
catch (ClassNotFoundException e)
{
System.err.println("Error in launcher.xml: Invalid class name: " + className);
System.exit(1);
}
// Strip the leading argument from the args, and add the arguments
// Set <passargs>false</passargs> if the arguments should not be passed on
String[] useargs = args.clone();
Class[] argTypes = {useargs.getClass()};
boolean passargs = true;
if ((step.getAttribute("passuserargs") != null) &&
("false".equalsIgnoreCase(step.getAttribute("passuserargs").getValue())))
{
passargs = false;
}
if ((args.length == 1) || (!passargs))
{
useargs = new String[0];
}
else
{
String[] argsnew = new String[useargs.length - 1];
for (int i = 1; i < useargs.length; i++)
{
argsnew[i - 1] = useargs[i];
}
useargs = argsnew;
}
// Add any extra properties
List<Element> bits = step.getChildren("argument");
if (step.getChild("argument") != null)
{
String[] argsnew = new String[useargs.length + bits.size()];
int i = 0;
for (Element arg : bits)
{
argsnew[i++] = arg.getValue();
}
for (; i < bits.size() + useargs.length; i++)
{
argsnew[i] = useargs[i - bits.size()];
}
useargs = argsnew;
}
// Run the main() method
try
{
Object[] arguments = {useargs};
// Useful for debugging, so left in the code...
/**System.out.print("About to execute: " + className);
for (String param : useargs)
{
System.out.print(" " + param);
}
System.out.println("");**/
Method main = target.getMethod("main", argTypes);
Object output = main.invoke(null, arguments);
}
catch (Exception e)
{
System.err.println("Exception: " + e.getMessage());
System.exit(1);
}
}
System.exit(0);
}
}
// The command wasn't found
System.err.println("Command not found: " + args[0]);
display();
System.exit(1);
}
public static Document getConfig()
{
// Load the launcher configuration file
String config = ConfigurationManager.getProperty("dspace.dir") +
System.getProperty("file.separator") + "config" +
System.getProperty("file.separator") + "launcher.xml";
SAXBuilder saxBuilder = new SAXBuilder();
Document doc = null;
try
{
doc = saxBuilder.build(config);
}
catch (Exception e)
{
System.err.println("Unable to load the launcher configuration file: [dspace]/config/launcher.xml");
System.err.println(e.getMessage());
System.exit(1);
}
return doc;
}
public static void display()
{
Document doc = getConfig();
List<Element> commands = doc.getRootElement().getChildren("command");
System.out.println("Usage: dspace [command-name] {parameters}");
for (Element command : commands)
{
System.out.println(" - " + command.getChild("name").getValue() +
": " + command.getChild("description").getValue());
}
}
}