fr.gael.dhus.server.http.webapp.WebApplication.java Source code

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Here is the source code for fr.gael.dhus.server.http.webapp.WebApplication.java

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/*
 * Data Hub Service (DHuS) - For Space data distribution.
 * Copyright (C) 2013,2014,2015,2017 GAEL Systems
 *
 * This file is part of DHuS software sources.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package fr.gael.dhus.server.http.webapp;

import com.google.common.io.Files;
import org.apache.commons.io.IOUtils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.JarURLConnection;
import java.net.URL;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;

/**
 * Abstract class defining WebApplication
 */
public abstract class WebApplication {
    private WebApp annotation;

    public WebApplication() {
        annotation = this.getClass().getAnnotation(WebApp.class);
        if (annotation == null) {
            throw new IllegalArgumentException("WebApp annotation is missing on " + this.getClass());
        }
    }

    public boolean isActive() {
        return true;
    }

    public abstract void configure(String dest_folder) throws IOException;

    public abstract boolean hasWarStream();

    public abstract InputStream getWarStream();

    /**
     * Throws an Exception if something is wrong with the web
     * application installation
     * @throws Exception
     */
    public abstract void checkInstallation() throws Exception;

    protected void copyFolder(File from, File to) throws IOException {
        to.mkdirs();
        for (File cfg : from.listFiles()) {
            if (cfg.isDirectory()) {
                copyFolder(cfg, new File(to, cfg.getName()));
            } else {
                Files.copy(cfg, new File(to, cfg.getName()));
            }
        }
    }

    protected void extractJarFolder(URL url, String configuration_folder, String dest_folder) throws IOException {
        final JarURLConnection connection = (JarURLConnection) url.openConnection();
        if (connection != null) {
            Enumeration<JarEntry> entries = connection.getJarFile().entries();
            while (entries.hasMoreElements()) {
                JarEntry entry = (JarEntry) entries.nextElement();
                if (!entry.isDirectory() && entry.getName().startsWith(configuration_folder)) {
                    InputStream in = connection.getJarFile().getInputStream(entry);
                    try {
                        File file = new File(dest_folder, entry.getName().substring(configuration_folder.length()));
                        if (!file.getParentFile().exists()) {
                            file.getParentFile().mkdirs();
                        }
                        OutputStream out = new FileOutputStream(file);
                        try {
                            IOUtils.copy(in, out);
                        } finally {
                            out.close();
                        }
                    } finally {
                        in.close();
                    }
                }
            }
        }
    }

    protected void extractJarFile(URL url, String configuration_folder, String dest_folder) throws IOException {
        final JarURLConnection connection = (JarURLConnection) url.openConnection();
        if (connection != null) {
            Enumeration<JarEntry> entries = connection.getJarFile().entries();
            while (entries.hasMoreElements()) {
                JarEntry entry = (JarEntry) entries.nextElement();
                if (!entry.isDirectory() && entry.getName().equals(configuration_folder)) {
                    InputStream in = connection.getJarFile().getInputStream(entry);
                    try {
                        File file = new File(dest_folder);
                        if (!file.getParentFile().exists()) {
                            file.getParentFile().mkdirs();
                        }
                        OutputStream out = new FileOutputStream(file);
                        try {
                            IOUtils.copy(in, out);
                        } finally {
                            out.close();
                        }
                    } finally {
                        in.close();
                    }
                }
            }
        }
    }

    public String getName() {
        return annotation.name();
    }

    public List<String> getWelcomeFiles() {
        return Arrays.asList(annotation.welcomeFiles());
    }

    public String getAllow() {
        return (annotation.allowIps().trim().isEmpty()) ? null : annotation.allowIps();
    }

    public String getDeny() {
        return (annotation.denyIps().trim().isEmpty()) ? null : annotation.denyIps();
    }

    public Boolean isPartOfScalability() {
        return Boolean.parseBoolean(annotation.scalability());
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append(getClass().getSimpleName()).append("{name:").append(annotation.name());
        sb.append("; welcome:").append(Arrays.asList(annotation.welcomeFiles()));
        sb.append("; allow:").append((annotation.allowIps().trim().isEmpty()) ? null : annotation.allowIps());
        sb.append("; deny:").append((annotation.denyIps().trim().isEmpty()) ? null : annotation.denyIps());
        sb.append('}');
        return sb.toString();
    }
}