org.mgnlconfig.yaml.dependency.YamlFileConfigDependency Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of light-yaml Show documentation

Enhances extension capabilities of Yaml configuration files (~ to JCR 'extends' property), provides connection to the JCR config workspace and to all the registries as well

The newest version!

/**
 * This file Copyright (c) 2016 Magnolia International
 * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
 *
 *
 * This file is dual-licensed under both the Magnolia
 * Network Agreement and the GNU General Public License.
 * You may elect to use one or the other of these licenses.
 *
 * This file is distributed in the hope that it will be
 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
 * Redistribution, except as permitted by whichever of the GPL
 * or MNA you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or
 * modify this file under the terms of the GNU General
 * Public License, Version 3, as published by the Free Software
 * Foundation.  You should have received a copy of the GNU
 * General Public License, Version 3 along with this program;
 * if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 2. For the Magnolia Network Agreement (MNA), this file
 * and the accompanying materials are made available under the
 * terms of the MNA which accompanies this distribution, and
 * is available at http://www.magnolia-cms.com/mna.html
 *
 * Any modifications to this file must keep this entire header
 * intact.
 *
 */
package org.mgnlconfig.yaml.dependency;


import info.magnolia.resourceloader.Resource;

import java.io.IOException;
import java.util.Collections;

import org.mgnlconfig.yaml.MgnYamlConstructor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.yaml.snakeyaml.Yaml;

class YamlFileConfigDependency implements ConfigDependency {

    private static final Logger log = LoggerFactory.getLogger(YamlFileConfigDependency.class);

    private final DependencyTracker dependencyTracker;

    private final Resource yamlResource;

    private long lastResolved = -1;

    YamlFileConfigDependency(DependencyTracker dependencyTracker, Resource yamlResource) {
        this.dependencyTracker = dependencyTracker;
        this.yamlResource = yamlResource;
    }

    @Override
    public boolean needsUpdate() {
        return yamlResource.getLastModified() > lastResolved;
    }

    @Override
    public Object getRawData() {
        try {
            lastResolved = System.currentTimeMillis();
            return new Yaml(new MgnYamlConstructor(dependencyTracker)).load(yamlResource.openReader());
        } catch (IOException e) {
            log.warn("{}", e.getMessage());
            return Collections.emptyMap();
        }
    }
}