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

Introduction

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

Prototype

@Override
    public List<Archive> getNestedArchives(EntryFilter filter) throws IOException 

Source Link

Usage

From source file:org.springframework.cloud.dataflow.app.launcher.ModuleLauncher.java

public void launchAggregatedModules(List<ModuleLaunchRequest> moduleLaunchRequests,
        Map<String, String> aggregateArgs) {
    try {//from  w w  w.j av  a2 s. com
        List<String> mainClassNames = new ArrayList<>();
        LinkedHashSet<URL> jarURLs = new LinkedHashSet<>();
        List<String> seenArchives = new ArrayList<>();
        final List<String[]> arguments = new ArrayList<>();
        final ClassLoader classLoader;
        if (!(aggregateArgs.containsKey(EXCLUDE_DEPENDENCIES_ARG)
                || aggregateArgs.containsKey(INCLUDE_DEPENDENCIES_ARG))) {
            for (ModuleLaunchRequest moduleLaunchRequest : moduleLaunchRequests) {
                Resource resource = resolveModule(moduleLaunchRequest.getModule());
                JarFileArchive jarFileArchive = new JarFileArchive(resource.getFile());
                jarURLs.add(jarFileArchive.getUrl());
                for (Archive archive : jarFileArchive.getNestedArchives(ArchiveMatchingEntryFilter.FILTER)) {
                    // avoid duplication based on unique JAR names
                    String urlAsString = archive.getUrl().toString();
                    String jarNameWithExtension = urlAsString.substring(0, urlAsString.lastIndexOf("!/"));
                    String jarNameWithoutExtension = jarNameWithExtension
                            .substring(jarNameWithExtension.lastIndexOf("/") + 1);
                    if (!seenArchives.contains(jarNameWithoutExtension)) {
                        seenArchives.add(jarNameWithoutExtension);
                        jarURLs.add(archive.getUrl());
                    }
                }
                mainClassNames.add(jarFileArchive.getMainClass());
                arguments.add(toArgArray(moduleLaunchRequest.getArguments()));
            }
            classLoader = ClassloaderUtils.createModuleClassloader(jarURLs.toArray(new URL[jarURLs.size()]));
        } else {
            // First, resolve modules and extract main classes - while slightly less efficient than just
            // doing the same processing after resolution, this ensures that module artifacts are processed
            // correctly for extracting their main class names. It is not possible in the general case to
            // identify, after resolution, whether a resource represents a module artifact which was part of the
            // original request or not. We will include the first module as root and the next as direct dependencies
            Coordinates root = null;
            ArrayList<Coordinates> includeCoordinates = new ArrayList<>();
            for (ModuleLaunchRequest moduleLaunchRequest : moduleLaunchRequests) {
                Coordinates moduleCoordinates = toCoordinates(moduleLaunchRequest.getModule());
                if (root == null) {
                    root = moduleCoordinates;
                } else {
                    includeCoordinates.add(toCoordinates(moduleLaunchRequest.getModule()));
                }
                Resource moduleResource = resolveModule(moduleLaunchRequest.getModule());
                JarFileArchive moduleArchive = new JarFileArchive(moduleResource.getFile());
                mainClassNames.add(moduleArchive.getMainClass());
                arguments.add(toArgArray(moduleLaunchRequest.getArguments()));
            }
            for (String include : StringUtils
                    .commaDelimitedListToStringArray(aggregateArgs.get(INCLUDE_DEPENDENCIES_ARG))) {
                includeCoordinates.add(toCoordinates(include));
            }
            // Resolve all artifacts - since modules have been specified as direct dependencies, they will take
            // precedence in the resolution order, ensuring that the already resolved artifacts will be returned as
            // part of the response.
            Resource[] libraries = moduleResolver.resolve(root,
                    includeCoordinates.toArray(new Coordinates[includeCoordinates.size()]),
                    StringUtils.commaDelimitedListToStringArray(aggregateArgs.get(EXCLUDE_DEPENDENCIES_ARG)));
            for (Resource library : libraries) {
                jarURLs.add(library.getURL());
            }
            classLoader = new URLClassLoader(jarURLs.toArray(new URL[jarURLs.size()]));
        }

        final List<Class<?>> mainClasses = new ArrayList<>();
        for (String mainClass : mainClassNames) {
            mainClasses.add(ClassUtils.forName(mainClass, classLoader));
        }
        Runnable moduleAggregatorRunner = new ModuleAggregatorRunner(classLoader, mainClasses,
                toArgArray(aggregateArgs), arguments);
        Thread moduleAggregatorRunnerThread = new Thread(moduleAggregatorRunner);
        moduleAggregatorRunnerThread.setContextClassLoader(classLoader);
        moduleAggregatorRunnerThread.setName(MODULE_AGGREGATOR_RUNNER_THREAD_NAME);
        moduleAggregatorRunnerThread.start();
    } catch (Exception e) {
        throw new RuntimeException("failed to start aggregated modules: "
                + StringUtils.collectionToCommaDelimitedString(moduleLaunchRequests), e);
    }
}

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