/**
* Runs the command without permission, data and concurrency checks.
*
* @param ctx database context
* @param os output stream
* @return result of check
*/
public boolean run(final Context ctx, final OutputStream os) {
perf = new Performance();
context = ctx;
prop = ctx.prop;
mprop = ctx.mprop;
out = PrintOutput.get(os);
try {
return run();
} catch (final ProgressException ex) {
// process was interrupted by the user or server
abort();
return error(INTERRUPTED);
} catch (final Throwable ex) {
// unexpected error
Performance.gc(2);
abort();
if (ex instanceof OutOfMemoryError) {
Util.debug(ex);
return error(OUT_OF_MEM + (createWrite() ? H_OUT_OF_MEM : ""));
}
return error(Util.bug(ex) + NL + info.toString());
} finally {
// flushes the output
try {
if (out != null) out.flush();
} catch (final IOException ignored) {
}
}
}
/**
* Adds the error message to the message buffer {@link #info}.
*
* @param msg error message
* @param ext error extension
* @return {@code false}
*/
protected final boolean error(final String msg, final Object... ext) {
info.reset();
info.addExt(msg == null ? "" : msg, ext);
return false;
}
/**
* Adds information on command execution.
*
* @param str information to be added
* @param ext extended info
* @return {@code true}
*/
protected final boolean info(final String str, final Object... ext) {
info.addExt(str, ext).add(NL);
return true;
}
/**
* Returns command information.
*
* @return info string
*/
public final String info() {
return info.toString();
}