ONOS checkin based on commit tag e796610b1f721d02f9b0e213cf6f7790c10ecd60

Change-Id: Ife8810491034fe7becdba75dda20de4267bd15cd

1 files changed, 82 insertions, 0 deletions

diff --git a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceClockManager.java b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceClockManager.java
new file mode 100644
index 00000000..da5bd5de
--- /dev/null
+++ b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceClockManager.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2014-2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.store.device.impl;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+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.cluster.ClusterService;
+import org.onosproject.cluster.NodeId;
+import org.onosproject.mastership.MastershipTerm;
+import org.onosproject.mastership.MastershipTermService;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.device.DeviceClockService;
+import org.onosproject.store.Timestamp;
+import org.onosproject.store.impl.MastershipBasedTimestamp;
+import org.slf4j.Logger;
+
+/**
+ * Clock service to issue Timestamp based on Device Mastership.
+ */
+@Component(immediate = true)
+@Service
+public class DeviceClockManager implements DeviceClockService {
+
+    private final Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected MastershipTermService mastershipTermService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected ClusterService clusterService;
+
+    protected NodeId localNodeId;
+
+    private final AtomicLong ticker = new AtomicLong(0);
+
+    @Activate
+    public void activate() {
+        localNodeId = clusterService.getLocalNode().id();
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        log.info("Stopped");
+    }
+
+    @Override
+    public Timestamp getTimestamp(DeviceId deviceId) {
+        MastershipTerm term = mastershipTermService.getMastershipTerm(deviceId);
+        if (term == null || !localNodeId.equals(term.master())) {
+            throw new IllegalStateException("Requesting timestamp for " + deviceId + " without mastership");
+        }
+        return new MastershipBasedTimestamp(term.termNumber(), ticker.incrementAndGet());
+    }
+
+    @Override
+    public boolean isTimestampAvailable(DeviceId deviceId) {
+        MastershipTerm term = mastershipTermService.getMastershipTerm(deviceId);
+        return term != null && localNodeId.equals(term.master());
+    }
+}