Examples with Session org.neo4j.driver.v1.Session used on opensource projects

Example 16 with Session

use of org.neo4j.driver.v1.Session in project ACS by ACS-Community.

the class Executor method remotePortable.

/**
    * @return false - if this failed gracefully
    * @throws IOException - if this failed severely
    */
private static boolean remotePortable(String username, String password, String command, String endMark, NativeCommand.Listener listener, String host) throws IOException {
    if (listener == null) {
        // normalization: use a do-nothing implementation
        listener = new NativeCommand.ListenerAdapter();
    }
    try {
        remoteFlow.reset(null);
        // connect
        // --------
        Connection conn = new Connection(host);
        connections.add(conn);
        conn.connect();
        remoteFlow.success(RemoteFlow.CONNECT);
        // login
        // ------
        boolean isAuthenticated = conn.authenticateWithPassword(username, password);
        if (isAuthenticated == false)
            throw new IOException("Authentication failed");
        remoteFlow.success(RemoteFlow.LOG_IN);
        // send command
        // -------------
        Session sess = conn.openSession();
        sessions.add(sess);
        /* msc 2008-11:
          * We're passing the command as an argument to ssh, just like typing
          * > ssh 127.0.0.1 "env" 
          * on the commandline. This opens a non-login shell on the remote host
          * which (thank you bash) won't parse the .bash_profile but only the .bashrc!
          * Now unfortunately the usual setup for accounts on Alma machines is to
          * have the ACS settings defined in .bash_profile. The optimal way around
          * this would be to run a real login shell here by allocating a terminal,
          * and then deal with all the input output/stuff ourselves. I'm trying here
          * to get away with something cheaper: Explicitly source the .bash_profile
          * before running the command.
          */
        command = ". ~/.bash_profile ; " + command;
        log.info("Now sending: '" + command + "'");
        sess.execCommand(command);
        remoteFlow.success(RemoteFlow.SEND_COMMAND);
        // read output, scan for endmark
        // ----------------------------
        SearchBuffer searchStdout = null;
        SearchBuffer searchStderr = null;
        if (endMark != null) {
            searchStdout = new SearchBuffer(endMark);
            searchStderr = new SearchBuffer(endMark);
        }
        InputStream stdout = sess.getStdout();
        InputStream stderr = sess.getStderr();
        byte[] buffer = new byte[8192];
        while (true) {
            if (stdout.available() == 0 && stderr.available() == 0) {
                /* Even though currently there is no data available, it may be that new data arrives
					 * and the session's underlying channel is closed before we call waitForCondition().
					 * This means that EOF and STDOUT_DATA (or STDERR_DATA, or both) may be set together. */
                int conditions = sess.waitForCondition(//
                ChannelCondition.STDOUT_DATA | ChannelCondition.STDERR_DATA | ChannelCondition.EOF, // allow several seconds
                10 * 1000);
                if ((conditions & ChannelCondition.TIMEOUT) != 0) {
                    throw new IOException("Timeout while waiting for data from peer");
                }
                if ((conditions & ChannelCondition.EOF) != 0) {
                    /* The remote side won't send us further data ... */
                    if ((conditions & (ChannelCondition.STDOUT_DATA | ChannelCondition.STDERR_DATA)) == 0) {
                        /* ... and we have consumed all data in the local arrival window. */
                        break;
                    }
                }
            /* At this point, either STDOUT_DATA or STDERR_DATA, (or both) is set. */
            }
            /* If you below use "if" instead of "while", then the way the output appears on the local
				 * stdout and stder streams is more "balanced". Addtionally reducing the buffer size
				 * will also improve the interleaving, but performance will slightly suffer.
				 * OKOK, that all matters only if you get HUGE amounts of stdout and stderr data =)
				 */
            if (stdout.available() > 0) {
                int len = stdout.read(buffer);
                listener.stdoutWritten(null, new String(buffer, 0, len));
                if (searchStdout != null)
                    if (searchStdout.add(buffer, 0, len)) {
                        remoteFlow.success(RemoteFlow.COMPLETE);
                        break;
                    }
            }
            if (stderr.available() > 0) {
                int len = stderr.read(buffer);
                // msc 2008-11: porting to a different ssh library. this should of course
                // call stderrWritten() but i don't want to change the original behavior.
                listener.stdoutWritten(null, new String(buffer, 0, len));
                if (searchStderr != null)
                    if (searchStderr.add(buffer, 0, len)) {
                        remoteFlow.success(RemoteFlow.COMPLETE);
                        break;
                    }
            }
        }
        return true;
    } catch (IOException exc) {
        remoteFlow.failure(exc);
        /* throw exc; */
        return false;
    }
}

Example 17 with Session

use of org.neo4j.driver.v1.Session in project intellij-community by JetBrains.

the class BasicWithHTTPProxy method main.

public static void main(String[] args) {
    String hostname = "my-ssh-server";
    String username = "joe";
    String password = "joespass";
    String proxyHost = "192.168.1.1";
    // default port used by squid
    int proxyPort = 3128;
    try {
        /* Create a connection instance */
        Connection conn = new Connection(hostname);
        /* We want to connect through a HTTP proxy */
        conn.setProxyData(new HTTPProxyData(proxyHost, proxyPort));
        // if the proxy requires basic authentication:
        // conn.setProxyData(new HTTPProxyData(proxyHost, proxyPort, "username", "secret"));
        /* Now connect (through the proxy) */
        conn.connect();
        /* Authenticate.
			 * If you get an IOException saying something like
			 * "Authentication method password not supported by the server at this stage."
			 * then please check the FAQ.
			 */
        boolean isAuthenticated = conn.authenticateWithPassword(username, password);
        if (isAuthenticated == false)
            throw new IOException("Authentication failed.");
        /* Create a session */
        Session sess = conn.openSession();
        sess.execCommand("uname -a && date && uptime && who");
        System.out.println("Here is some information about the remote host:");
        /* 
			 * This basic example does not handle stderr, which is sometimes dangerous
			 * (please read the FAQ).
			 */
        InputStream stdout = new StreamGobbler(sess.getStdout());
        BufferedReader br = new BufferedReader(new InputStreamReader(stdout));
        while (true) {
            String line = br.readLine();
            if (line == null)
                break;
            System.out.println(line);
        }
        /* Show exit status, if available (otherwise "null") */
        System.out.println("ExitCode: " + sess.getExitStatus());
        /* Close this session */
        sess.close();
        /* Close the connection */
        conn.close();
    } catch (IOException e) {
        e.printStackTrace(System.err);
        System.exit(2);
    }
}

Example 18 with Session

use of org.neo4j.driver.v1.Session in project intellij-community by JetBrains.

the class SingleThreadStdoutStderr method main.

public static void main(String[] args) {
    String hostname = "127.0.0.1";
    String username = "joe";
    String password = "joespass";
    try {
        /* Create a connection instance */
        Connection conn = new Connection(hostname);
        /* Now connect */
        conn.connect();
        /* Authenticate */
        boolean isAuthenticated = conn.authenticateWithPassword(username, password);
        if (isAuthenticated == false)
            throw new IOException("Authentication failed.");
        /* Create a session */
        Session sess = conn.openSession();
        sess.execCommand("echo \"Huge amounts of text on STDOUT\"; echo \"Huge amounts of text on STDERR\" >&2");
        /*
			 * Advanced:
			 * The following is a demo on how one can read from stdout and
			 * stderr without having to use two parallel worker threads (i.e.,
			 * we don't use the Streamgobblers here) and at the same time not
			 * risking a deadlock (due to a filled SSH2 channel window, caused
			 * by the stream which you are currently NOT reading from =).
			 */
        /* Don't wrap these streams and don't let other threads work on
			 * these streams while you work with Session.waitForCondition()!!!
			 */
        InputStream stdout = sess.getStdout();
        InputStream stderr = sess.getStderr();
        byte[] buffer = new byte[8192];
        while (true) {
            if ((stdout.available() == 0) && (stderr.available() == 0)) {
                /* Even though currently there is no data available, it may be that new data arrives
					 * and the session's underlying channel is closed before we call waitForCondition().
					 * This means that EOF and STDOUT_DATA (or STDERR_DATA, or both) may
					 * be set together.
					 */
                int conditions = sess.waitForCondition(ChannelCondition.STDOUT_DATA | ChannelCondition.STDERR_DATA | ChannelCondition.EOF, 2000);
                if ((conditions & ChannelCondition.TIMEOUT) != 0) {
                    /* A timeout occured. */
                    throw new IOException("Timeout while waiting for data from peer.");
                }
                if ((conditions & ChannelCondition.EOF) != 0) {
                    if ((conditions & (ChannelCondition.STDOUT_DATA | ChannelCondition.STDERR_DATA)) == 0) {
                        /* ... and we have consumed all data in the local arrival window. */
                        break;
                    }
                }
            /* OK, either STDOUT_DATA or STDERR_DATA (or both) is set. */
            // You can be paranoid and check that the library is not going nuts:
            // if ((conditions & (ChannelCondition.STDOUT_DATA | ChannelCondition.STDERR_DATA)) == 0)
            //	throw new IllegalStateException("Unexpected condition result (" + conditions + ")");
            }
            while (stdout.available() > 0) {
                int len = stdout.read(buffer);
                if (// this check is somewhat paranoid
                len > 0)
                    System.out.write(buffer, 0, len);
            }
            while (stderr.available() > 0) {
                int len = stderr.read(buffer);
                if (// this check is somewhat paranoid
                len > 0)
                    System.err.write(buffer, 0, len);
            }
        }
        /* Close this session */
        sess.close();
        /* Close the connection */
        conn.close();
    } catch (IOException e) {
        e.printStackTrace(System.err);
        System.exit(2);
    }
}

Example 19 with Session

use of org.neo4j.driver.v1.Session in project intellij-community by JetBrains.

the class StdoutAndStderr method main.

public static void main(String[] args) {
    String hostname = "127.0.0.1";
    String username = "joe";
    String password = "joespass";
    try {
        /* Create a connection instance */
        Connection conn = new Connection(hostname);
        /* Now connect */
        conn.connect();
        /* Authenticate */
        boolean isAuthenticated = conn.authenticateWithPassword(username, password);
        if (isAuthenticated == false)
            throw new IOException("Authentication failed.");
        /* Create a session */
        Session sess = conn.openSession();
        sess.execCommand("echo \"Text on STDOUT\"; echo \"Text on STDERR\" >&2");
        InputStream stdout = new StreamGobbler(sess.getStdout());
        InputStream stderr = new StreamGobbler(sess.getStderr());
        BufferedReader stdoutReader = new BufferedReader(new InputStreamReader(stdout));
        BufferedReader stderrReader = new BufferedReader(new InputStreamReader(stderr));
        System.out.println("Here is the output from stdout:");
        while (true) {
            String line = stdoutReader.readLine();
            if (line == null)
                break;
            System.out.println(line);
        }
        System.out.println("Here is the output from stderr:");
        while (true) {
            String line = stderrReader.readLine();
            if (line == null)
                break;
            System.out.println(line);
        }
        /* Close this session */
        sess.close();
        /* Close the connection */
        conn.close();
    } catch (IOException e) {
        e.printStackTrace(System.err);
        System.exit(2);
    }
}

Example 20 with Session

use of org.neo4j.driver.v1.Session in project cloudstack by apache.

the class SshHelper method openConnectionSession.

/**
     * It gets a {@link Session} from the given {@link Connection}; then, it waits
     * {@value #WAITING_OPEN_SSH_SESSION} milliseconds before returning the session, given a time to
     * ensure that the connection is open before proceeding the execution.
     */
protected static Session openConnectionSession(Connection conn) throws IOException, InterruptedException {
    Session sess = conn.openSession();
    Thread.sleep(WAITING_OPEN_SSH_SESSION);
    return sess;
}