Madan Jampani | 3e033bd | 2015-04-08 13:03:49 -0700 | [diff] [blame] | 1 | package org.onosproject.store.core.impl; |
| 2 | |
| 3 | import static org.slf4j.LoggerFactory.getLogger; |
| 4 | |
| 5 | import org.apache.felix.scr.annotations.Activate; |
| 6 | import org.apache.felix.scr.annotations.Component; |
| 7 | import org.apache.felix.scr.annotations.Deactivate; |
| 8 | import org.apache.felix.scr.annotations.Reference; |
| 9 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 10 | import org.apache.felix.scr.annotations.Service; |
| 11 | import org.onosproject.store.Timestamp; |
| 12 | import org.onosproject.store.impl.LogicalTimestamp; |
| 13 | import org.onosproject.store.service.AtomicCounter; |
| 14 | import org.onosproject.store.service.LogicalClockService; |
| 15 | import org.onosproject.store.service.StorageService; |
| 16 | import org.slf4j.Logger; |
| 17 | |
| 18 | /** |
| 19 | * LogicalClockService implementation based on a AtomicCounter. |
| 20 | */ |
| 21 | @Component(immediate = true, enabled = true) |
| 22 | @Service |
| 23 | public class LogicalClockManager implements LogicalClockService { |
| 24 | |
| 25 | private final Logger log = getLogger(getClass()); |
| 26 | |
| 27 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 28 | protected StorageService storageService; |
| 29 | |
| 30 | private static final String SYSTEM_LOGICAL_CLOCK_COUNTER_NAME = "sys-clock-counter"; |
| 31 | private AtomicCounter atomicCounter; |
| 32 | |
| 33 | @Activate |
| 34 | public void activate() { |
| 35 | atomicCounter = storageService.atomicCounterBuilder() |
| 36 | .withName(SYSTEM_LOGICAL_CLOCK_COUNTER_NAME) |
| 37 | .withPartitionsDisabled() |
| 38 | .build(); |
| 39 | log.info("Started."); |
| 40 | } |
| 41 | |
| 42 | @Deactivate |
| 43 | public void deactivate() { |
| 44 | log.info("Stopped."); |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | public Timestamp getTimestamp() { |
| 49 | return new LogicalTimestamp(atomicCounter.incrementAndGet()); |
| 50 | } |
| 51 | } |