/** Based on the deadline, calculate and set the timeout to the given headers. */
private static void updateTimeoutHeaders(
@Nullable Deadline effectiveDeadline,
@Nullable Deadline callDeadline,
@Nullable Deadline outerCallDeadline,
Metadata headers) {
headers.removeAll(TIMEOUT_KEY);
if (effectiveDeadline == null) {
return;
}
long effectiveTimeout = max(0, effectiveDeadline.timeRemaining(TimeUnit.NANOSECONDS));
headers.put(TIMEOUT_KEY, effectiveTimeout);
logIfContextNarrowedTimeout(
effectiveTimeout, effectiveDeadline, outerCallDeadline, callDeadline);
}
private static void logIfContextNarrowedTimeout(
long effectiveTimeout,
Deadline effectiveDeadline,
@Nullable Deadline outerCallDeadline,
@Nullable Deadline callDeadline) {
if (!log.isLoggable(Level.INFO) || outerCallDeadline != effectiveDeadline) {
return;
}
StringBuilder builder = new StringBuilder();
builder.append(
String.format("Call timeout set to '%d' ns, due to context deadline.", effectiveTimeout));
if (callDeadline == null) {
builder.append(" Explicit call timeout was not set.");
} else {
long callTimeout = callDeadline.timeRemaining(TimeUnit.NANOSECONDS);
builder.append(String.format(" Explicit call timeout was '%d' ns.", callTimeout));
}
log.info(builder.toString());
}