Example usage for org.springframework.boot.loader.archive Archive getManifest

Introduction

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

Prototype

Manifest getManifest() throws IOException;

Source Link

Document

Returns the manifest of the archive.

Usage

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

/**
 * Scan for plugins.//from w w w.  j  a  v a 2s  .  c o  m
 */
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);
        }
    }
}

---

From source file:org.springframework.cloud.deployer.thin.ThinJarAppWrapper.java

protected String getMainClass(Archive archive) {
    try {/*from   w  w w .ja  va  2  s  .  com*/
        Manifest manifest = archive.getManifest();
        String mainClass = null;
        if (manifest != null) {
            mainClass = manifest.getMainAttributes().getValue("Start-Class");
        }
        if (mainClass == null) {
            throw new IllegalStateException("No 'Start-Class' manifest entry specified in " + this);
        }
        return mainClass;
    } catch (Exception e) {
        try {
            File root = new File(archive.getUrl().toURI());
            if (archive instanceof ExplodedArchive) {
                return MainClassFinder.findSingleMainClass(root);
            } else {
                return MainClassFinder.findSingleMainClass(new JarFile(root), "/");
            }
        } catch (Exception ex) {
            throw new IllegalStateException("Cannot find main class", e);
        }
    }
}

---