Example usage for org.springframework.boot.loader.archive JarFileArchive JarFileArchive

Introduction

In this page you can find the example usage for org.springframework.boot.loader.archive JarFileArchive JarFileArchive.

Prototype

public JarFileArchive(File file, URL url) throws IOException 

Source Link

Usage

From source file:com.hurence.logisland.classloading.PluginLoader.java

/**
 * Scan for plugins./*from w ww  . ja  va 2s . c  om*/
 */
private static void scanAndRegisterPlugins() {
    Set<URL> urls = new HashSet<>();
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    while (cl != null) {
        if (cl instanceof URLClassLoader) {
            urls.addAll(Arrays.asList(((URLClassLoader) cl).getURLs()));
            cl = cl.getParent();
        }
    }

    for (URL url : urls) {
        try {
            Archive archive = null;
            try {
                archive = new JarFileArchive(
                        new File(URLDecoder.decode(url.getFile(), Charset.defaultCharset().name())), url);
            } catch (Exception e) {
                //silently swallowing exception. just skip the archive since not an archive
            }
            if (archive == null) {
                continue;
            }
            Manifest manifest = archive.getManifest();
            if (manifest != null) {
                String exportedPlugins = manifest.getMainAttributes()
                        .getValue(ManifestAttributes.MODULE_EXPORTS);
                if (exportedPlugins != null) {
                    String version = StringUtils.defaultIfEmpty(
                            manifest.getMainAttributes().getValue(ManifestAttributes.MODULE_VERSION),
                            "UNKNOWN");

                    logger.info("Loading components from module {}", archive.getUrl().toExternalForm());

                    final Archive arc = archive;

                    if (StringUtils.isNotBlank(exportedPlugins)) {
                        Arrays.stream(exportedPlugins.split(",")).map(String::trim).forEach(s -> {
                            if (registry.putIfAbsent(s, PluginClassloaderBuilder.build(arc)) == null) {
                                logger.info("Registered component '{}' version '{}'", s, version);
                            }

                        });
                    }
                }
            }

        } catch (Exception e) {
            logger.error("Unable to load components from " + url.toExternalForm(), e);
        }
    }
}

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