Examples with Configuration java.lang.module.Configuration used on opensource projects

Example 1 with Configuration

use of java.lang.module.Configuration in project Bytecoder by mirkosertic.

the class LauncherHelper method showResolvedModules.

/**
 * Called by the launcher to show the resolved modules
 */
static void showResolvedModules() {
    initOutput(System.out);
    ModuleLayer bootLayer = ModuleLayer.boot();
    Configuration cf = bootLayer.configuration();
    cf.modules().stream().map(ResolvedModule::reference).sorted(new JrtFirstComparator()).forEach(LauncherHelper::showModule);
}

Example 2 with Configuration

use of java.lang.module.Configuration in project Bytecoder by mirkosertic.

the class Module method findModule.

/**
 * Find the runtime Module corresponding to the given ResolvedModule
 * in the given parent layer (or its parents).
 */
private static Module findModule(ModuleLayer parent, ResolvedModule resolvedModule) {
    Configuration cf = resolvedModule.configuration();
    String dn = resolvedModule.name();
    return parent.layers().filter(l -> l.configuration() == cf).findAny().map(layer -> {
        Optional<Module> om = layer.findModule(dn);
        assert om.isPresent() : dn + " not found in layer";
        Module m = om.get();
        assert m.getLayer() == layer : m + " not in expected layer";
        return m;
    }).orElse(null);
}

Example 3 with Configuration

use of java.lang.module.Configuration in project Bytecoder by mirkosertic.

the class ModuleBootstrap method limitFinder.

/**
 * Returns a ModuleFinder that limits observability to the given root
 * modules, their transitive dependences, plus a set of other modules.
 */
private static ModuleFinder limitFinder(ModuleFinder finder, Set<String> roots, Set<String> otherMods) {
    // resolve all root modules
    Configuration cf = Configuration.empty().resolve(finder, ModuleFinder.of(), roots);
    // module name -> reference
    Map<String, ModuleReference> map = new HashMap<>();
    // root modules and their transitive dependences
    cf.modules().stream().map(ResolvedModule::reference).forEach(mref -> map.put(mref.descriptor().name(), mref));
    // additional modules
    otherMods.stream().map(finder::find).flatMap(Optional::stream).forEach(mref -> map.putIfAbsent(mref.descriptor().name(), mref));
    // set of modules that are observable
    Set<ModuleReference> mrefs = new HashSet<>(map.values());
    return new ModuleFinder() {

        @Override
        public Optional<ModuleReference> find(String name) {
            return Optional.ofNullable(map.get(name));
        }

        @Override
        public Set<ModuleReference> findAll() {
            return mrefs;
        }
    };
}

Example 4 with Configuration

use of java.lang.module.Configuration in project Bytecoder by mirkosertic.

the class Modules method loadModule.

/**
 * Called by the VM to load a system module, typically "java.instrument" or
 * "jdk.management.agent". If the module is not loaded then it is resolved
 * and loaded (along with any dependences that weren't previously loaded)
 * into a child layer.
 */
public static synchronized Module loadModule(String name) {
    ModuleLayer top = topLayer;
    if (top == null)
        top = ModuleLayer.boot();
    Module module = top.findModule(name).orElse(null);
    if (module != null) {
        // module already loaded
        return module;
    }
    // resolve the module with the top-most layer as the parent
    ModuleFinder empty = ModuleFinder.of();
    ModuleFinder finder = ModuleBootstrap.unlimitedFinder();
    Set<String> roots = Set.of(name);
    Configuration cf = top.configuration().resolveAndBind(empty, finder, roots);
    // create the child layer
    Function<String, ClassLoader> clf = ModuleLoaderMap.mappingFunction(cf);
    ModuleLayer newLayer = top.defineModules(cf, clf);
    // add qualified exports/opens to give access to modules in child layer
    Map<String, Module> map = newLayer.modules().stream().collect(Collectors.toMap(Module::getName, Function.identity()));
    ModuleLayer layer = top;
    while (layer != null) {
        for (Module m : layer.modules()) {
            // qualified exports
            m.getDescriptor().exports().stream().filter(ModuleDescriptor.Exports::isQualified).forEach(e -> e.targets().forEach(target -> {
                Module other = map.get(target);
                if (other != null) {
                    addExports(m, e.source(), other);
                }
            }));
            // qualified opens
            m.getDescriptor().opens().stream().filter(ModuleDescriptor.Opens::isQualified).forEach(o -> o.targets().forEach(target -> {
                Module other = map.get(target);
                if (other != null) {
                    addOpens(m, o.source(), other);
                }
            }));
        }
        List<ModuleLayer> parents = layer.parents();
        assert parents.size() <= 1;
        layer = parents.isEmpty() ? null : parents.get(0);
    }
    // update security manager before making types visible
    JLA.addNonExportedPackages(newLayer);
    // update the built-in class loaders to make the types visible
    for (ResolvedModule resolvedModule : cf.modules()) {
        ModuleReference mref = resolvedModule.reference();
        String mn = mref.descriptor().name();
        ClassLoader cl = clf.apply(mn);
        if (cl == null) {
            BootLoader.loadModule(mref);
        } else {
            ((BuiltinClassLoader) cl).loadModule(mref);
        }
    }
    // new top layer
    topLayer = newLayer;
    // return module
    return newLayer.findModule(name).orElseThrow(() -> new InternalError("module not loaded"));
}

Example 5 with Configuration

use of java.lang.module.Configuration in project Bytecoder by mirkosertic.

the class ModuleBootstrap method boot.

/**
 * Initialize the module system, returning the boot layer.
 *
 * @see java.lang.System#initPhase2()
 */
public static ModuleLayer boot() throws Exception {
    // Step 0: Command line options
    long t0 = System.nanoTime();
    ModuleFinder upgradeModulePath = finderFor("jdk.module.upgrade.path");
    ModuleFinder appModulePath = finderFor("jdk.module.path");
    boolean isPatched = patcher.hasPatches();
    String mainModule = System.getProperty("jdk.module.main");
    Set<String> addModules = addModules();
    Set<String> limitModules = limitModules();
    PrintStream traceOutput = null;
    String trace = getAndRemoveProperty("jdk.module.showModuleResolution");
    if (trace != null && Boolean.parseBoolean(trace))
        traceOutput = System.out;
    // Step 1: The observable system modules, either all system modules
    // or the system modules pre-generated for the initial module (the
    // initial module may be the unnamed module). If the system modules
    // are pre-generated for the initial module then resolution can be
    // skipped.
    long t1 = System.nanoTime();
    SystemModules systemModules = null;
    ModuleFinder systemModuleFinder;
    boolean haveModulePath = (appModulePath != null || upgradeModulePath != null);
    boolean needResolution = true;
    if (!haveModulePath && addModules.isEmpty() && limitModules.isEmpty()) {
        systemModules = SystemModuleFinders.systemModules(mainModule);
        if (systemModules != null && !isPatched && (traceOutput == null)) {
            needResolution = false;
        }
    }
    if (systemModules == null) {
        // all system modules are observable
        systemModules = SystemModuleFinders.allSystemModules();
    }
    if (systemModules != null) {
        // images build
        systemModuleFinder = SystemModuleFinders.of(systemModules);
    } else {
        // exploded build or testing
        systemModules = new ExplodedSystemModules();
        systemModuleFinder = SystemModuleFinders.ofSystem();
    }
    Counters.add("jdk.module.boot.1.systemModulesTime", t1);
    // Step 2: Define and load java.base. This patches all classes loaded
    // to date so that they are members of java.base. Once java.base is
    // loaded then resources in java.base are available for error messages
    // needed from here on.
    long t2 = System.nanoTime();
    ModuleReference base = systemModuleFinder.find(JAVA_BASE).orElse(null);
    if (base == null)
        throw new InternalError(JAVA_BASE + " not found");
    URI baseUri = base.location().orElse(null);
    if (baseUri == null)
        throw new InternalError(JAVA_BASE + " does not have a location");
    BootLoader.loadModule(base);
    Modules.defineModule(null, base.descriptor(), baseUri);
    Counters.add("jdk.module.boot.2.defineBaseTime", t2);
    if (getAndRemoveProperty("jdk.module.validation") != null) {
        return createBootLayerForValidation();
    }
    // Step 3: If resolution is needed then create the module finder and
    // the set of root modules to resolve.
    long t3 = System.nanoTime();
    ModuleFinder savedModuleFinder = null;
    ModuleFinder finder;
    Set<String> roots;
    if (needResolution) {
        // upgraded modules override the modules in the run-time image
        if (upgradeModulePath != null)
            systemModuleFinder = ModuleFinder.compose(upgradeModulePath, systemModuleFinder);
        // The module finder: [--upgrade-module-path] system [--module-path]
        if (appModulePath != null) {
            finder = ModuleFinder.compose(systemModuleFinder, appModulePath);
        } else {
            finder = systemModuleFinder;
        }
        // The root modules to resolve
        roots = new HashSet<>();
        // launcher -m option to specify the main/initial module
        if (mainModule != null)
            roots.add(mainModule);
        // additional module(s) specified by --add-modules
        boolean addAllDefaultModules = false;
        boolean addAllSystemModules = false;
        boolean addAllApplicationModules = false;
        for (String mod : addModules) {
            switch(mod) {
                case ALL_DEFAULT:
                    addAllDefaultModules = true;
                    break;
                case ALL_SYSTEM:
                    addAllSystemModules = true;
                    break;
                case ALL_MODULE_PATH:
                    addAllApplicationModules = true;
                    break;
                default:
                    roots.add(mod);
            }
        }
        // --limit-modules
        savedModuleFinder = finder;
        if (!limitModules.isEmpty()) {
            finder = limitFinder(finder, limitModules, roots);
        }
        // the default set of roots.
        if (mainModule == null || addAllDefaultModules) {
            roots.addAll(DefaultRoots.compute(systemModuleFinder, finder));
        }
        // modules will be resolved.
        if (addAllSystemModules) {
            // observable modules
            ModuleFinder f = finder;
            systemModuleFinder.findAll().stream().map(ModuleReference::descriptor).map(ModuleDescriptor::name).filter(// observable
            mn -> f.find(mn).isPresent()).forEach(mn -> roots.add(mn));
        }
        // modules on the application module path will be resolved.
        if (appModulePath != null && addAllApplicationModules) {
            // observable modules
            ModuleFinder f = finder;
            appModulePath.findAll().stream().map(ModuleReference::descriptor).map(ModuleDescriptor::name).filter(// observable
            mn -> f.find(mn).isPresent()).forEach(mn -> roots.add(mn));
        }
    } else {
        // no resolution case
        finder = systemModuleFinder;
        roots = null;
    }
    Counters.add("jdk.module.boot.3.optionsAndRootsTime", t3);
    // Step 4: Resolve the root modules, with service binding, to create
    // the configuration for the boot layer. If resolution is not needed
    // then create the configuration for the boot layer from the
    // readability graph created at link time.
    long t4 = System.nanoTime();
    Configuration cf;
    if (needResolution) {
        cf = JLMA.resolveAndBind(finder, roots, traceOutput);
    } else {
        Map<String, Set<String>> map = systemModules.moduleReads();
        cf = JLMA.newConfiguration(systemModuleFinder, map);
    }
    // check that modules specified to --patch-module are resolved
    if (isPatched) {
        patcher.patchedModules().stream().filter(mn -> !cf.findModule(mn).isPresent()).forEach(mn -> warnUnknownModule(PATCH_MODULE, mn));
    }
    Counters.add("jdk.module.boot.4.resolveTime", t4);
    // Step 5: Map the modules in the configuration to class loaders.
    // The static configuration provides the mapping of standard and JDK
    // modules to the boot and platform loaders. All other modules (JDK
    // tool modules, and both explicit and automatic modules on the
    // application module path) are defined to the application class
    // loader.
    long t5 = System.nanoTime();
    // mapping of modules to class loaders
    Function<String, ClassLoader> clf = ModuleLoaderMap.mappingFunction(cf);
    // loaded from the runtime image
    if (haveModulePath) {
        for (ResolvedModule resolvedModule : cf.modules()) {
            ModuleReference mref = resolvedModule.reference();
            String name = mref.descriptor().name();
            ClassLoader cl = clf.apply(name);
            if (cl == null) {
                if (upgradeModulePath != null && upgradeModulePath.find(name).isPresent())
                    fail(name + ": cannot be loaded from upgrade module path");
                if (!systemModuleFinder.find(name).isPresent())
                    fail(name + ": cannot be loaded from application module path");
            }
        }
    }
    // check for split packages in the modules mapped to the built-in loaders
    if (systemModules.hasSplitPackages() || isPatched || haveModulePath) {
        checkSplitPackages(cf, clf);
    }
    // load/register the modules with the built-in class loaders
    loadModules(cf, clf);
    Counters.add("jdk.module.boot.5.loadModulesTime", t5);
    // Step 6: Define all modules to the VM
    long t6 = System.nanoTime();
    ModuleLayer bootLayer = ModuleLayer.empty().defineModules(cf, clf);
    Counters.add("jdk.module.boot.6.layerCreateTime", t6);
    // check incubating status
    if (systemModules.hasIncubatorModules() || haveModulePath) {
        checkIncubatingStatus(cf);
    }
    // --add-reads, --add-exports/--add-opens, and --illegal-access
    long t7 = System.nanoTime();
    addExtraReads(bootLayer);
    boolean extraExportsOrOpens = addExtraExportsAndOpens(bootLayer);
    addIllegalAccess(upgradeModulePath, systemModules, bootLayer, extraExportsOrOpens);
    Counters.add("jdk.module.boot.7.adjustModulesTime", t7);
    // save module finders for later use
    if (savedModuleFinder != null) {
        unlimitedFinder = new SafeModuleFinder(savedModuleFinder);
        if (savedModuleFinder != finder)
            limitedFinder = new SafeModuleFinder(finder);
    }
    // total time to initialize
    Counters.add("jdk.module.boot.totalTime", t0);
    Counters.publish();
    return bootLayer;
}