/** * Adds group reservation to this partition. * * @param r Reservation. * @return {@code false} If such reservation already added. */ public boolean addReservation(GridDhtPartitionsReservation r) { assert state.getReference() != EVICTED : "we can reserve only active partitions"; assert state.getStamp() != 0 : "partition must be already reserved before adding group reservation"; return reservations.addIfAbsent(r); }
/** * @param updateSeq Update sequence. * @return {@code True} if entry has been transitioned to state EVICTED. */ boolean tryEvict(boolean updateSeq) { if (state.getReference() != RENTING || state.getStamp() != 0 || groupReserved()) return false; // Attempt to evict partition entries from cache. clearAll(); if (map.isEmpty() && state.compareAndSet(RENTING, EVICTED, 0, 0)) { if (log.isDebugEnabled()) log.debug("Evicted partition: " + this); if (!GridQueryProcessor.isEnabled(cctx.config())) clearSwap(); if (cctx.isDrEnabled()) cctx.dr().partitionEvicted(id); cctx.dataStructures().onPartitionEvicted(id); rent.onDone(); ((GridDhtPreloader) cctx.preloader()).onPartitionEvicted(this, updateSeq); clearDeferredDeletes(); return true; } return false; }
/** * Reserves a partition so it won't be cleared. * * @return {@code True} if reserved. */ @Override public boolean reserve() { while (true) { int reservations = state.getStamp(); GridDhtPartitionState s = state.getReference(); if (s == EVICTED) return false; if (state.compareAndSet(s, s, reservations, reservations + 1)) return true; } }
/** Releases previously reserved partition. */ @Override public void release() { while (true) { int reservations = state.getStamp(); if (reservations == 0) return; GridDhtPartitionState s = state.getReference(); assert s != EVICTED; // Decrement reservations. if (state.compareAndSet(s, s, reservations, --reservations)) { tryEvict(true); break; } } }
/** * @param updateSeq Update sequence. * @return Future to signal that this node is no longer an owner or backup. */ IgniteInternalFuture<?> rent(boolean updateSeq) { while (true) { int reservations = state.getStamp(); GridDhtPartitionState s = state.getReference(); if (s == RENTING || s == EVICTED) return rent; if (state.compareAndSet(s, RENTING, reservations, reservations)) { if (log.isDebugEnabled()) log.debug("Moved partition to RENTING state: " + this); // Evict asynchronously, as the 'rent' method may be called // from within write locks on local partition. tryEvictAsync(updateSeq); break; } } return rent; }
/** @return {@code True} if transitioned to OWNING state. */ boolean own() { while (true) { int reservations = state.getStamp(); GridDhtPartitionState s = state.getReference(); if (s == RENTING || s == EVICTED) return false; if (s == OWNING) return true; assert s == MOVING; if (state.compareAndSet(MOVING, OWNING, reservations, reservations)) { if (log.isDebugEnabled()) log.debug("Owned partition: " + this); // No need to keep history any more. evictHist = null; return true; } } }
/** @return Partition state. */ public GridDhtPartitionState state() { return state.getReference(); }