Example usage for java.util.concurrent ConcurrentHashMap ConcurrentHashMap

Introduction

In this page you can find the example usage for java.util.concurrent ConcurrentHashMap ConcurrentHashMap.

Prototype

public ConcurrentHashMap()

Source Link

Document

Creates a new, empty map with the default initial table size (16).

Usage

From source file:com.krawler.portal.util.SystemProperties.java

private SystemProperties() {
    Properties p = new Properties();

    ClassLoader classLoader = getClass().getClassLoader();

    // system.properties

    try {/* w w  w.j  a v a  2s.c o  m*/
        URL url = classLoader.getResource("system.properties");

        if (url != null) {
            InputStream is = url.openStream();

            p.load(is);

            is.close();

            logger.debug("Loading " + url);
        }
    } catch (Exception e) {
        logger.warn(e.getMessage(), e);
    }

    // system-ext.properties

    try {
        URL url = classLoader.getResource("system-ext.properties");

        if (url != null) {
            InputStream is = url.openStream();

            p.load(is);

            is.close();

            logger.debug("Loading " + url);
        }
    } catch (Exception e) {
        logger.warn(e.getMessage(), e);
    }

    // Set environment properties

    SystemEnv.setProperties(p);

    // Set system properties

    boolean systemPropertiesLoad = GetterUtil.getBoolean(System.getProperty(SYSTEM_PROPERTIES_LOAD), true);

    boolean systemPropertiesFinal = GetterUtil.getBoolean(System.getProperty(SYSTEM_PROPERTIES_FINAL), true);

    if (systemPropertiesLoad) {
        Enumeration<String> enu = (Enumeration<String>) p.propertyNames();

        while (enu.hasMoreElements()) {
            String key = enu.nextElement();

            if (systemPropertiesFinal || Validator.isNull(System.getProperty(key))) {

                System.setProperty(key, p.getProperty(key));
            }
        }
    }

    _props = new ConcurrentHashMap<String, String>();

    // Use a fast concurrent hash map implementation instead of the slower
    // java.util.Properties

    PropertiesUtil.fromProperties(p, _props);
}