/** {@inheritDoc} */ @Override public Map<?, ?> waitForAttributes(Collection<?> keys, long timeout) throws InterruptedException { A.notNull(keys, "keys"); if (keys.isEmpty()) return Collections.emptyMap(); if (timeout == 0) timeout = Long.MAX_VALUE; long now = System.currentTimeMillis(); // Prevent overflow. long end = now + timeout < 0 ? Long.MAX_VALUE : now + timeout; // Don't wait longer than session timeout. if (end > endTime) end = endTime; synchronized (mux) { while (!closed && !attrs.keySet().containsAll(keys) && now < end) { mux.wait(end - now); now = System.currentTimeMillis(); } if (closed) throw new InterruptedException("Session was closed: " + this); Map<Object, Object> retVal = new HashMap<Object, Object>(keys.size()); for (Object key : keys) retVal.put(key, attrs.get(key)); return retVal; } }