SideBandProgressMonitor.java

/*
 * Copyright (C) 2008-2010, Google Inc. and others
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0 which is available at
 * https://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package org.eclipse.jgit.transport;

import java.io.IOException;
import java.io.OutputStream;

import org.eclipse.jgit.lib.BatchingProgressMonitor;
import org.eclipse.jgit.lib.Constants;

/** Write progress messages out to the sideband channel. */
class SideBandProgressMonitor extends BatchingProgressMonitor {
    private final OutputStream out;

    private boolean write;

    SideBandProgressMonitor(OutputStream os) {
        out = os;
        write = true;
    }

    /** {@inheritDoc} */
    @Override
    protected void onUpdate(String taskName, int workCurr) {
        StringBuilder s = new StringBuilder();
        format(s, taskName, workCurr);
        s.append("   \r"); //$NON-NLS-1$
        send(s);
    }

    /** {@inheritDoc} */
    @Override
    protected void onEndTask(String taskName, int workCurr) {
        StringBuilder s = new StringBuilder();
        format(s, taskName, workCurr);
        s.append(", done\n"); //$NON-NLS-1$
        send(s);
    }

    private void format(StringBuilder s, String taskName, int workCurr) {
        s.append(taskName);
        s.append(": "); //$NON-NLS-1$
        s.append(workCurr);
    }

    /** {@inheritDoc} */
    @Override
    protected void onUpdate(String taskName, int cmp, int totalWork, int pcnt) {
        StringBuilder s = new StringBuilder();
        format(s, taskName, cmp, totalWork, pcnt);
        s.append("   \r"); //$NON-NLS-1$
        send(s);
    }

    /** {@inheritDoc} */
    @Override
    protected void onEndTask(String taskName, int cmp, int totalWork, int pcnt) {
        StringBuilder s = new StringBuilder();
        format(s, taskName, cmp, totalWork, pcnt);
        s.append("\n"); //$NON-NLS-1$
        send(s);
    }

    private void format(StringBuilder s, String taskName, int cmp,
            int totalWork, int pcnt) {
        s.append(taskName);
        s.append(": "); //$NON-NLS-1$
        if (pcnt < 100)
            s.append(' ');
        if (pcnt < 10)
            s.append(' ');
        s.append(pcnt);
        s.append("% ("); //$NON-NLS-1$
        s.append(cmp);
        s.append("/"); //$NON-NLS-1$
        s.append(totalWork);
        s.append(")"); //$NON-NLS-1$
    }

    private void send(StringBuilder s) {
        if (write) {
            try {
                out.write(Constants.encode(s.toString()));
                out.flush();
            } catch (IOException err) {
                write = false;
            }
        }
    }
}