ONOS checkin based on commit tag e796610b1f721d02f9b0e213cf6f7790c10ecd60

Change-Id: Ife8810491034fe7becdba75dda20de4267bd15cd

1 files changed, 51 insertions, 0 deletions

diff --git a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/core/impl/LogicalClockManager.java b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/core/impl/LogicalClockManager.java
new file mode 100644
index 00000000..ccf0f326
--- /dev/null
+++ b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/core/impl/LogicalClockManager.java
@@ -0,0 +1,51 @@
+package org.onosproject.store.core.impl;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+import org.onosproject.store.Timestamp;
+import org.onosproject.store.impl.LogicalTimestamp;
+import org.onosproject.store.service.AtomicCounter;
+import org.onosproject.store.service.LogicalClockService;
+import org.onosproject.store.service.StorageService;
+import org.slf4j.Logger;
+
+/**
+ * LogicalClockService implementation based on a AtomicCounter.
+ */
+@Component(immediate = true, enabled = true)
+@Service
+public class LogicalClockManager implements LogicalClockService {
+
+    private final Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected StorageService storageService;
+
+    private static final String SYSTEM_LOGICAL_CLOCK_COUNTER_NAME = "sys-clock-counter";
+    private AtomicCounter atomicCounter;
+
+    @Activate
+    public void activate() {
+        atomicCounter = storageService.atomicCounterBuilder()
+                                      .withName(SYSTEM_LOGICAL_CLOCK_COUNTER_NAME)
+                                      .withPartitionsDisabled()
+                                      .build();
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        log.info("Stopped");
+    }
+
+    @Override
+    public Timestamp getTimestamp() {
+        return new LogicalTimestamp(atomicCounter.incrementAndGet());
+    }
+}
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