ConfigProperties.java

/*
 * Copyright (c) 2014, 2016 Red Hat, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */

package org.opendaylight.ovsdb.utils.config;

import java.util.HashMap;
import java.util.Map;

import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.FrameworkUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public final class ConfigProperties {
    private static final Logger LOG = LoggerFactory.getLogger(ConfigProperties.class);
    private static final Map<String, String> OVERRIDES = new HashMap<>();

    private ConfigProperties() {
        // empty
    }

    public static String getProperty(Class<?> classParam, final String propertyStr) {
        return getProperty(classParam, propertyStr, null);
    }

    public static String getProperty(Class<?> classParam, final String propertyStr, final String defaultValue) {
        String value = ConfigProperties.OVERRIDES.get(propertyStr);
        if (value != null) {
            return value;
        }

        Bundle bundle = FrameworkUtil.getBundle(classParam);

        if (bundle != null) {
            BundleContext bundleContext = bundle.getBundleContext();
            if (bundleContext != null) {
                value = bundleContext.getProperty(propertyStr);
            }
        }
        if (value == null) {
            value = System.getProperty(propertyStr, defaultValue);
        }

        if (value == null) {
            LOG.debug("ConfigProperties missing a value for {}, default {}", propertyStr, defaultValue);
        }

        return value;
    }

    public static void overrideProperty(String property, String value) {
        ConfigProperties.OVERRIDES.put(property, value);
    }
}