Example usage for java.util.stream Stream parallel

Introduction

In this page you can find the example usage for java.util.stream Stream parallel.

Prototype

S parallel();

Source Link

Document

Returns an equivalent stream that is parallel.

Usage

From source file:org.hswebframework.web.service.authorization.simple.SimpleAuthorizationSettingService.java

private List<AuthorizationSettingEntity> getUserSetting(String userId) {
    Map<String, List<SettingInfo>> settingInfo = authorizationSettingTypeSuppliers.stream()
            .map(supplier -> supplier.get(userId)).flatMap(Set::stream)
            .collect(Collectors.groupingBy(SettingInfo::getType));
    Stream<Map.Entry<String, List<SettingInfo>>> settingInfoStream = settingInfo.entrySet().stream();
    //1 ?/*from  w  ww  . j  a  va2s  .  c  o m*/
    if (settingInfo.size() > 1) {
        settingInfoStream = settingInfoStream.parallel();
    }
    return settingInfoStream.map(entry -> createQuery()
            // where type = ? and setting_for in (?,?,?....)
            .where(type, entry.getKey()).and()
            .in(settingFor,
                    entry.getValue().stream().map(SettingInfo::getSettingFor).collect(Collectors.toList()))
            .listNoPaging()).flatMap(List::stream).collect(Collectors.toList());
}

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From source file:org.pdfsam.configuration.EnhancedClassloaderProvider.java

private static URL[] getUrls(Stream<Path> files) throws MalformedURLException {
    Set<URI> modules = files.parallel().filter(new JarSignatureFilter()).map(Path::toUri)
            .collect(Collectors.toSet());
    // TODO remove all this cumbersome code once Eclipse stops complaining about uncaught exception when using stream.map
    List<URL> urls = new ArrayList<>();
    for (URI module : modules) {
        urls.add(module.toURL());/*  w  w w .  j  av  a 2  s.c  o  m*/
    }
    return urls.toArray(new URL[urls.size()]);
}

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