hadoopInstaller.installation.HostInstallation.java Source code

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Here is the source code for hadoopInstaller.installation.HostInstallation.java

Source

package hadoopInstaller.installation;

/*
 * #%L
 * Hadoop Installer
 * %%
 * Copyright (C) 2015 - 2016 Julin Maestri
 * %%
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * #L%
 */

import hadoopInstaller.exception.InstallationError;
import hadoopInstaller.logging.MessageFormattingLog;

import java.net.URI;
import java.net.URISyntaxException;

import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.VFS;

import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;

public class HostInstallation {

    private Host host;
    private Installer installer;
    private MessageFormattingLog log;

    public HostInstallation(Host aHost, Installer anInstaller) {
        host = aHost;
        installer = anInstaller;
        log = installer.getLog();
    }

    public void run() throws InstallationError {
        log.info("HostInstallation.Started", //$NON-NLS-1$
                host.getHostname());
        Session session = sshConnect();
        // TODO- Detect if the hostname is correctly set in the target host, and
        // promp to fix it. if needed
        FileObject remoteDirectory = sftpConnect();
        try {
            if (installer.doDeploy()) {
                new DeployInstallationFiles(host, session, remoteDirectory, installer).run();
            }
            new UploadConfiguration(installer.getConfigurationFilesToUpload(),
                    installer.getConfig().deleteOldConfigurationFiles(), log).run(host, remoteDirectory);
        } finally {
            try {
                remoteDirectory.close();
                log.debug("HostInstallation.SFTP.Disconnect", //$NON-NLS-1$
                        host.getHostname());
            } catch (FileSystemException e) {
                throw new InstallationError(e, "HostInstallation.CouldNotClose", //$NON-NLS-1$
                        remoteDirectory.getName().getURI());
            }
            if (session.isConnected()) {
                session.disconnect();
                log.debug("HostInstallation.SSH.Disconnect", //$NON-NLS-1$
                        host.getHostname());
            }
        }
        log.info("HostInstallation.Ended", //$NON-NLS-1$
                host.getHostname());
    }

    private FileObject sftpConnect() throws InstallationError {
        FileObject remoteDirectory;
        log.debug("HostInstallation.SFTP.Connect.Start", //$NON-NLS-1$
                host.getHostname(), host.getUsername());
        try {
            String uri = new URI("sftp", host.getUsername(), //$NON-NLS-1$
                    host.getHostname(), host.getPort(), host.getInstallationDirectory(), null, null).toString();
            remoteDirectory = VFS.getManager().resolveFile(uri, installer.getSftpOptions());
        } catch (URISyntaxException | FileSystemException e) {
            throw new InstallationError(e, "HostInstallation.SFTP.Connect.End", //$NON-NLS-1$
                    host.getHostname());
        }
        try {
            if (!remoteDirectory.exists()) {
                remoteDirectory.createFolder();
            }
        } catch (FileSystemException e) {
            throw new InstallationError(e, "HostInstallation.CouldNotCreate", //$NON-NLS-1$
                    remoteDirectory.getName().getURI(), host.getUsername());
        }
        log.debug("HostInstallation.SFTP.Connect.Success", //$NON-NLS-1$
                host.getHostname(), host.getUsername());
        return remoteDirectory;
    }

    private Session sshConnect() throws InstallationError {
        Session session = null;
        log.debug("HostInstallation.SSH.Connect.Start", //$NON-NLS-1$
                host.getHostname(), host.getUsername());
        try {
            session = installer.getSsh().getSession(host.getUsername(), host.getHostname(), host.getPort());
            session.connect();
        } catch (JSchException e) {
            /*
             * TODO If configuration say so, ask if a user should be created.
             * This should try to login as root, or sudo user, the configuration
             * username with a password indicated by the user, and configure ssh
             * keys.
             */
            throw new InstallationError(e, "HostInstallation.SSH.Connect.Fail", //$NON-NLS-1$
                    host.getHostname(), host.getUsername());
        }
        log.debug("HostInstallation.SSH.Connect.Success", //$NON-NLS-1$
                host.getHostname(), host.getUsername());
        return session;
    }
}