Example usage for org.eclipse.jgit.errors LockFailedException LockFailedException

Introduction

In this page you can find the example usage for org.eclipse.jgit.errors LockFailedException LockFailedException.

Prototype

public LockFailedException(File file) 

Source Link

Document

Construct a CannotLockException for the given file

Usage

From source file:org.ms123.common.git.FileHolder.java

License:Open Source License

/**
 * Save the configuration as a Git text style configuration file.
 * <p>//from w w  w. j  a  v  a2  s  . c om
 * <b>Warning:</b> Although this method uses the traditional Git file
 * locking approach to protect against concurrent writes of the
 * configuration file, it does not ensure that the file has not been
 * modified since the last read, which means updates performed by other
 * objects accessing the same backing file may be lost.
 *
 * @throws IOException
 *             the file could not be written.
 */
public void save() throws IOException {
    byte[] out1;
    byte[] out2 = new byte[0];
    byte[] outTotal;
    final String text = toText();
    if (utf8Bom) {
        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bos.write(0xEF);
        bos.write(0xBB);
        bos.write(0xBF);
        bos.write(text.getBytes(UTF8_CHARSET.name()));
        out1 = bos.toByteArray();
    } else {
        out1 = encode(text);
    }
    if (m_content != null) {
        out2 = encode("--\n" + m_content);
    }
    outTotal = concat(out1, out2);
    final LockFile lf = new LockFile(getFile(), fs);
    if (!lf.lock())
        throw new LockFailedException(getFile());
    try {
        lf.setNeedSnapshot(true);
        lf.write(outTotal);
        if (!lf.commit()) {
            throw new IOException(MessageFormat.format(JGitText.get().cannotCommitWriteTo, getFile()));
        }
    } finally {
        lf.unlock();
    }
    snapshot = lf.getCommitSnapshot();
    hash = hash(outTotal);
    fireConfigChangedEvent();
}

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