eu.eidas.node.utils.PluginPropertyLoader.java Source code

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Here is the source code for eu.eidas.node.utils.PluginPropertyLoader.java

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/*
 * Copyright (c) 2015 by European Commission
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/european-union-public-licence-eupl-v.1.1
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 *
 */

package eu.eidas.node.utils;

import eu.eidas.node.logging.LoggingMarkerMDC;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

/**
 * property loader for integration plugins
 */
public class PluginPropertyLoader extends PropertyPlaceholderConfigurer {
    private static final Logger LOGGER = LoggerFactory.getLogger(PluginPropertyLoader.class.getName());
    String locationProp = null;
    String[] locationNames = null;
    Resource[] locations = null;

    public void setLocationProp(String locationProp) {
        this.locationProp = locationProp;
    }

    public void setLocationNames(String[] locations) {
        if (locations != null) {
            locationNames = new String[locations.length];
            System.arraycopy(locations, 0, locationNames, 0, locationNames.length);
        }
    }

    @Override
    protected String resolvePlaceholder(String placeholder, Properties props) {
        String result = super.resolvePlaceholder(placeholder, props);
        if (result == null || result.isEmpty()) {
            result = PropertiesUtil.getProperty(placeholder);
        }
        if (result == null) {
            result = "";
        }
        return result;
    }

    @Override
    protected void loadProperties(Properties props) throws IOException {
        updatePropLocation();
        LOGGER.info(LoggingMarkerMDC.SYSTEM_EVENT, "Loading properties");
        if (props != null && locations != null && locations.length > 0) {
            super.loadProperties(props);
        }
    }

    private boolean isLocationReadable(String locationPropValue) {
        for (int i = 0; i < locationNames.length && locationPropValue != null; i++) {
            if (!locations[0].isReadable()) {
                LOGGER.error("Not readable config file " + locationNames[i]);
                locations = null;
                return false;
            }
        }
        return true;

    }

    private void updatePropLocation() {
        if (locationProp != null && locationNames != null && locationNames.length > 0) {
            List<Resource> loadedLocations = new ArrayList<Resource>();
            DefaultResourceLoader drl = new DefaultResourceLoader();
            String locationPropValue = PropertiesUtil.getProperty(locationProp);
            for (int i = 0; i < locationNames.length && locationPropValue != null; i++) {
                String currentLocation = locationPropValue + locationNames[i];
                loadedLocations.add(drl.getResource("file:" + currentLocation.replace(File.separatorChar, '/')));
            }
            locations = new Resource[loadedLocations.size()];
            loadedLocations.toArray(locations);
            if (isLocationReadable(locationPropValue) && locations.length > 0) {
                setLocations(locations);
            }
        }
    }
}