Examples with ChannelExec com.jcraft.jsch.ChannelExec used on opensource projects

Example 71 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project winery by eclipse.

the class InstanceModelUtils method executeCommand.

public static String executeCommand(Session session, String command) {
    ChannelExec channelExec = null;
    try {
        logger.info("Executing script: \"{}\"", command);
        channelExec = (ChannelExec) session.openChannel("exec");
        channelExec.setCommand(command);
        StringBuilder outputBuffer = new StringBuilder();
        StringBuilder errorBuffer = new StringBuilder();
        InputStream in = channelExec.getInputStream();
        InputStream err = channelExec.getExtInputStream();
        channelExec.connect();
        byte[] tmp = new byte[1024];
        int timer = 0;
        while (true) {
            while (in.available() > 0) {
                int i = in.read(tmp, 0, 1024);
                if (i < 0)
                    break;
                outputBuffer.append(new String(tmp, 0, i));
            }
            while (err.available() > 0) {
                int i = err.read(tmp, 0, 1024);
                if (i < 0)
                    break;
                errorBuffer.append(new String(tmp, 0, i));
            }
            if (channelExec.isClosed() && in.available() == 0 && err.available() == 0) {
                break;
            }
            if (timer++ % 5 == 0) {
                logger.info("Still executing...");
            }
            // noinspection BusyWait
            Thread.sleep(1000);
        }
        if (!errorBuffer.toString().isEmpty()) {
            logger.error(errorBuffer.toString());
        }
        if (!outputBuffer.toString().isEmpty()) {
            logger.info(outputBuffer.toString());
        }
        logger.info("\"{}\" exited with code '{}'", command, channelExec.getExitStatus());
        return outputBuffer.toString().trim();
    } catch (JSchException | InterruptedException | IOException e) {
        throw new RuntimeException("Failed to execute command \"" + command + "\"");
    } finally {
        if (channelExec != null) {
            channelExec.disconnect();
        }
    }
}