diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/portchain/impl/PortChainManager.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/portchain/impl/PortChainManager.java
new file mode 100644
index 0000000..5201a2c
--- /dev/null
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/portchain/impl/PortChainManager.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright 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.vtnrsc.portchain.impl;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.util.Collections;
+
+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.onlab.util.KryoNamespace;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.EventuallyConsistentMap;
+import org.onosproject.store.service.MultiValuedTimestamp;
+import org.onosproject.store.service.StorageService;
+import org.onosproject.store.service.WallClockTimestamp;
+import org.onosproject.vtnrsc.PortChain;
+import org.onosproject.vtnrsc.PortChainId;
+import org.onosproject.vtnrsc.portchain.PortChainService;
+import org.slf4j.Logger;
+
+/**
+ * Provides implementation of the portChainService.
+ */
+@Component(immediate = true)
+@Service
+public class PortChainManager implements PortChainService {
+
+    private final Logger log = getLogger(getClass());
+
+    private static final String PORT_CHAIN_ID_NULL = "PortChain ID cannot be null";
+    private static final String PORT_CHAIN_NULL = "PortChain cannot be null";
+
+    private EventuallyConsistentMap<PortChainId, PortChain> portChainStore;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected StorageService storageService;
+
+    @Activate
+    public void activate() {
+
+        KryoNamespace.Builder serializer = KryoNamespace.newBuilder()
+                .register(KryoNamespaces.API)
+                .register(MultiValuedTimestamp.class)
+                .register(PortChain.class);
+
+        portChainStore = storageService
+                .<PortChainId, PortChain>eventuallyConsistentMapBuilder()
+                .withName("portchainstore").withSerializer(serializer)
+                .withTimestampProvider((k, v) -> new WallClockTimestamp()).build();
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        portChainStore.destroy();
+        log.info("Stopped");
+    }
+
+    @Override
+    public boolean exists(PortChainId portChainId) {
+        checkNotNull(portChainId, PORT_CHAIN_ID_NULL);
+        return portChainStore.containsKey(portChainId);
+    }
+
+    @Override
+    public int getPortChainCount() {
+        return portChainStore.size();
+    }
+
+    @Override
+    public Iterable<PortChain> getPortChains() {
+        return Collections.unmodifiableCollection(portChainStore.values());
+    }
+
+    @Override
+    public PortChain getPortChain(PortChainId portChainId) {
+        checkNotNull(portChainId, PORT_CHAIN_ID_NULL);
+        return portChainStore.get(portChainId);
+    }
+
+    @Override
+    public boolean createPortChain(PortChain portChain) {
+        checkNotNull(portChain, PORT_CHAIN_NULL);
+
+        portChainStore.put(portChain.portChainId(), portChain);
+        if (!portChainStore.containsKey(portChain.portChainId())) {
+            log.debug("The portChain is created failed which identifier was {}", portChain.portChainId()
+                      .toString());
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean updatePortChain(PortChain portChain) {
+        checkNotNull(portChain, PORT_CHAIN_NULL);
+
+        if (!portChainStore.containsKey(portChain.portChainId())) {
+            log.debug("The portChain is not exist whose identifier was {} ",
+                      portChain.portChainId().toString());
+            return false;
+        }
+
+        portChainStore.put(portChain.portChainId(), portChain);
+
+        if (!portChain.equals(portChainStore.get(portChain.portChainId()))) {
+            log.debug("The portChain is updated failed whose identifier was {} ",
+                      portChain.portChainId().toString());
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean removePortChain(PortChainId portChainId) {
+        checkNotNull(portChainId, PORT_CHAIN_NULL);
+
+        portChainStore.remove(portChainId);
+        if (portChainStore.containsKey(portChainId)) {
+            log.debug("The portChain is removed failed whose identifier was {}",
+                      portChainId.toString());
+            return false;
+        }
+        return true;
+    }
+}
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/portchain/impl/package-info.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/portchain/impl/package-info.java
new file mode 100644
index 0000000..424d54a
--- /dev/null
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/portchain/impl/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 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.
+ */
+
+/**
+ * Implementation of service for interacting with the inventory of port chains.
+ */
+package org.onosproject.vtnrsc.portchain.impl;