Example usage for org.springframework.context.support ClassPathXmlApplicationContext isActive

Introduction

In this page you can find the example usage for org.springframework.context.support ClassPathXmlApplicationContext isActive.

Prototype

@Override
    public boolean isActive() 

Source Link

Usage

From source file:org.easyrec.plugin.container.PluginRegistry.java

@SuppressWarnings({ "unchecked" })
public PluginVO checkPlugin(byte[] file) throws Exception {
    PluginVO plugin;//  w ww . j  a v a2 s .  co m
    FileOutputStream fos = null;
    URLClassLoader ucl;
    ClassPathXmlApplicationContext cax = null;
    File tmpFile = null;

    try {
        if (file == null)
            throw new IllegalArgumentException("Passed file must not be null!");

        tmpFile = File.createTempFile("plugin", null);
        tmpFile.deleteOnExit();

        fos = new FileOutputStream(tmpFile);
        fos.write(file);
        fos.close();

        // check if plugin is valid
        ucl = new URLClassLoader(new URL[] { tmpFile.toURI().toURL() }, this.getClass().getClassLoader());

        if (ucl.getResourceAsStream(DEFAULT_PLUGIN_CONFIG_FILE) != null) {
            cax = new ClassPathXmlApplicationContext(new String[] { DEFAULT_PLUGIN_CONFIG_FILE }, false,
                    appContext);
            cax.setClassLoader(ucl);
            logger.info("Classloader: " + cax.getClassLoader());
            cax.refresh();

            Map<String, GeneratorPluginSupport> beans = cax.getBeansOfType(GeneratorPluginSupport.class);

            if (beans.isEmpty()) {
                logger.debug("No class implementing a generator could be found. Plugin rejected!");
                throw new Exception("No class implementing a generator could be found. Plugin rejected!");
            }

            Generator<GeneratorConfiguration, GeneratorStatistics> generator = beans.values().iterator().next();

            logger.info(String.format("Plugin successfully validated! class: %s name: %s, id: %s",
                    generator.getClass(), generator.getDisplayName(), generator.getId()));

            cax.getAutowireCapableBeanFactory().autowireBeanProperties(generator,
                    AutowireCapableBeanFactory.AUTOWIRE_BY_NAME, false);

            plugin = new PluginVO(generator.getDisplayName(), generator.getId().getUri(),
                    generator.getId().getVersion(), LifecyclePhase.NOT_INSTALLED.toString(), file, null);

            if (tmpFile.delete())
                logger.info("tmpFile deleted successfully");

            return plugin;
        } else { // config file not found
            logger.debug("No valid config file found in the supplied .jar file. Plugin rejected!");
            throw new Exception("No valid config file found in the supplied .jar file. Plugin rejected!");
        }
    } catch (Exception e) {
        logger.error("An Exception occurred while checking the plugin!", e);

        throw e;
    } finally {
        if (fos != null)
            fos.close();

        if ((cax != null) && (!cax.isActive()))
            cax.close();

        if (tmpFile != null)
            try {
                if (!tmpFile.delete())
                    logger.warn("could not delete tmpFile");
            } catch (SecurityException se) {
                logger.error("Could not delete temporary file! Please check permissions!", se);
            }
    }
}

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