/jira3-script-plugin/src/main/java/com/google/code/jira/script/service/ScriptService.java

package com.google.code.jira.script.service;



import java.io.FileReader;

import java.io.IOException;

import java.io.Reader;

import java.util.Iterator;

import java.util.List;



import javax.script.ScriptEngine;

import javax.script.ScriptEngineFactory;

import javax.script.ScriptEngineManager;

import javax.script.ScriptException;



import org.apache.commons.io.IOUtils;

import org.apache.log4j.Category;



import com.atlassian.configurable.ObjectConfiguration;

import com.atlassian.configurable.ObjectConfigurationException;

import com.atlassian.jira.service.AbstractService;

import com.opensymphony.module.propertyset.PropertySet;



public class ScriptService extends AbstractService {



	private static final Category log = Category.getInstance(ScriptService.class);



	private static final String SERVICE_ID = ScriptService.class.getName();



	private static final String SERVICE_XML = "service/scriptservice.xml";



	private static final String INPUT_FILE_KEY = "FILE";



	private static final String ENGINE_NAME_KEY = "ENGINE";



	private String inputFile;



	private String engineName;



	public ObjectConfiguration getObjectConfiguration() throws ObjectConfigurationException {

		return getObjectConfiguration(SERVICE_ID, SERVICE_XML, null);

	}



	public void init(PropertySet ps) throws ObjectConfigurationException {

		super.init(ps);

		inputFile = getProperty(INPUT_FILE_KEY);

		engineName = getProperty(ENGINE_NAME_KEY);

		log.info("init: " + getName() + " - " + engineName + " - " + inputFile);

	}



	public void run() {

		log.info("run: " + getName() + " located at " + inputFile + " using " + engineName + " as engine.");



		// Validates "engineName" property

		if (engineName == null || "".equals(engineName)) {

			log.error("Skip running service because engine name is NULL!");

			return;

		}



		// Validates "inputFile" property

		if (inputFile == null || "".equals(inputFile)) {

			log.error("Skip running service because input file is NULL!");

			return;

		}



		// Loads the engine

		ScriptEngineManager manager = new ScriptEngineManager();

		List factories = manager.getEngineFactories();

		if (factories == null || factories.size() == 0) {

			log.error("No engines found! Please check your JVM version and configuration.");

		}



		ScriptEngine engine = null;

		for (Iterator iterator = factories.iterator(); iterator.hasNext();) {

			ScriptEngineFactory factory = (ScriptEngineFactory) iterator.next();

			if (engineName.equals(factory.getEngineName())) {

				engine = factory.getScriptEngine();

				break;

			}

		}



		if (engine == null) {

			log.error("No script engine found associate with the name " + engineName + ".");

		}



		Reader reader = null;

		try {

			engine.put("log", log);



			reader = new FileReader(inputFile);

			engine.eval(reader);

		} catch (ScriptException e) {

			log.error("Error evaluating script.", e);

		} catch (IOException e) {

			log.error("Error loading file.", e);

		} finally {

			IOUtils.closeQuietly(reader);

		}

	}

}