/** {@inheritDoc} */ @Override public final Map<UUID, GridNodeMetrics> metrics(Collection<UUID> nodeIds) throws GridSpiException { assert !F.isEmpty(nodeIds); long now = U.currentTimeMillis(); Collection<UUID> expired = new LinkedList<>(); for (UUID id : nodeIds) { GridNodeMetrics nodeMetrics = metricsMap.get(id); Long ts = tsMap.get(id); if (nodeMetrics == null || ts == null || ts < now - metricsExpireTime) expired.add(id); } if (!expired.isEmpty()) { Map<UUID, GridNodeMetrics> refreshed = metrics0(expired); for (UUID id : refreshed.keySet()) tsMap.put(id, now); metricsMap.putAll(refreshed); } return F.view(metricsMap, F.contains(nodeIds)); }