FileHandler.java 文件源码

/**
 * Flush the writer.
 */
@Override
public void flush() {

    writerLock.readLock().lock();
    try {
        if (writer == null)
            return;
        writer.flush();
    } catch (Exception e) {
        reportError(null, e, ErrorManager.FLUSH_FAILURE);
    } finally {
        writerLock.readLock().unlock();
    }

}