org.codice.ddf.admin.application.service.impl.ApplicationConfigInstaller.java Source code

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Here is the source code for org.codice.ddf.admin.application.service.impl.ApplicationConfigInstaller.java

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/**
 * Copyright (c) Codice Foundation
 * <p>
 * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 * <p>
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License
 * is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 */
package org.codice.ddf.admin.application.service.impl;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.EnumSet;
import java.util.Map.Entry;
import java.util.Properties;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.karaf.features.FeaturesService;
import org.codice.ddf.admin.application.service.ApplicationService;
import org.codice.ddf.admin.application.service.ApplicationServiceException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Installs applications based on a configuration file.
 */
public class ApplicationConfigInstaller extends Thread {

    private static final Logger LOGGER = LoggerFactory.getLogger(ApplicationConfigInstaller.class);

    private ApplicationService appService;

    private FeaturesService featuresService;

    private String postInstallFeatureStart;

    private String postInstallFeatureStop;

    private String fileName;

    /**
     * Constructor that creates the config installer.
     *
     * @param fileName                Full pathname of the properties file.
     * @param appService              Reference to the application server that should be called to
     *                                start the applications.
     * @param featuresService         Reference to the features service that should be used to stop
     *                                and start and post-installation features.
     * @param postInstallFeatureStart Feature that should be started if installation occurs.
     * @param postInstallFeatureStop  Feature that should be stopped if installation occurs.
     */
    public ApplicationConfigInstaller(String fileName, ApplicationService appService,
            FeaturesService featuresService, String postInstallFeatureStart, String postInstallFeatureStop) {
        this.fileName = fileName;
        this.appService = appService;
        this.featuresService = featuresService;
        this.postInstallFeatureStart = postInstallFeatureStart;
        this.postInstallFeatureStop = postInstallFeatureStop;
    }

    @Override
    public void run() {

        File configFile = new File(fileName);
        if (!configFile.exists()) {
            LOGGER.debug("No config file located, cannot load from it.");
            return;
        }
        InputStream is = null;
        try {
            is = new FileInputStream(configFile);
            Properties props = new Properties();
            props.load(is);
            if (!props.isEmpty()) {
                LOGGER.debug("Found applications to install from config.");
                for (Entry<Object, Object> curApp : props.entrySet()) {
                    String appName = curApp.getKey().toString();
                    String appLocation = curApp.getValue().toString();
                    LOGGER.debug("Starting app {} at location: {}", appName, appLocation);

                    try {
                        if (StringUtils.isNotEmpty(appLocation)) {
                            appService.addApplication(new URI(appLocation));
                        }
                        appService.startApplication(appName);
                    } catch (ApplicationServiceException ase) {
                        LOGGER.warn("Could not start " + appName, ase);
                    } catch (URISyntaxException use) {
                        LOGGER.warn("Could not install application, location is not a valid URI " + appLocation,
                                use);
                    }

                }
                LOGGER.debug("Finished installing applications, uninstalling installer module...");

                try {
                    if (!StringUtils.isBlank(postInstallFeatureStart)) {
                        featuresService.installFeature(postInstallFeatureStart,
                                EnumSet.of(FeaturesService.Option.NoAutoRefreshBundles));
                    }
                    if (!StringUtils.isBlank(postInstallFeatureStop)) {
                        featuresService.uninstallFeature(postInstallFeatureStop);
                    }
                } catch (Exception e) {
                    LOGGER.debug("Error while trying to run the post-install start and stop operations.", e);
                }

            } else {
                LOGGER.debug("No applications were found in the configuration file.");
            }
            is.close();
        } catch (FileNotFoundException fnfe) {
            LOGGER.warn("Could not file the configuration file at " + configFile.getAbsolutePath(), fnfe);
        } catch (IOException ioe) {
            LOGGER.warn("Could not load file as property list.", ioe);
        } finally {
            IOUtils.closeQuietly(is);
        }
    }

}