Examples with ServiceLoader java.util.ServiceLoader used on opensource projects

Example 6 with ServiceLoader

use of java.util.ServiceLoader in project jdk8u_jdk by JetBrains.

the class Charset method providers.

// Creates an iterator that walks over the available providers, ignoring
// those whose lookup or instantiation causes a security exception to be
// thrown.  Should be invoked with full privileges.
//
private static Iterator<CharsetProvider> providers() {
    return new Iterator<CharsetProvider>() {

        ClassLoader cl = ClassLoader.getSystemClassLoader();

        ServiceLoader<CharsetProvider> sl = ServiceLoader.load(CharsetProvider.class, cl);

        Iterator<CharsetProvider> i = sl.iterator();

        CharsetProvider next = null;

        private boolean getNext() {
            while (next == null) {
                try {
                    if (!i.hasNext())
                        return false;
                    next = i.next();
                } catch (ServiceConfigurationError sce) {
                    if (sce.getCause() instanceof SecurityException) {
                        // Ignore security exceptions
                        continue;
                    }
                    throw sce;
                }
            }
            return true;
        }

        public boolean hasNext() {
            return getNext();
        }

        public CharsetProvider next() {
            if (!getNext())
                throw new NoSuchElementException();
            CharsetProvider n = next;
            next = null;
            return n;
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
}

Example 7 with ServiceLoader

use of java.util.ServiceLoader in project JMRI by JMRI.

the class StartupActionModelUtil method prepareActionsHashMap.

private void prepareActionsHashMap() {
    if (this.actions == null) {
        this.actions = new HashMap<>();
        this.overrides = new HashMap<>();
        ResourceBundle rb = ResourceBundle.getBundle("apps.ActionListBundle");
        rb.keySet().stream().filter((key) -> (!key.isEmpty())).forEach((key) -> {
            try {
                Class<?> clazz = Class.forName(key);
                ActionAttributes attrs = new ActionAttributes(rb.getString(key), clazz);
                this.actions.put(clazz, attrs);
            } catch (ClassNotFoundException ex) {
                log.error("Did not find class \"{}\"", key);
            }
        });
        ServiceLoader<StartupActionFactory> loader = ServiceLoader.load(StartupActionFactory.class);
        loader.forEach(factory -> {
            for (Class<?> clazz : factory.getActionClasses()) {
                ActionAttributes attrs = new ActionAttributes(factory.getTitle(clazz), clazz);
                this.actions.put(clazz, attrs);
                for (String overridden : factory.getOverriddenClasses(clazz)) {
                    this.overrides.put(overridden, clazz);
                }
            }
        });
        // allow factories to be garbage collected
        loader.reload();
    }
}