diff --git a/apps/flowanalyzer/src/main/java/org/onosproject/flowanalyzer/FlowAnalyzer.java b/apps/flowanalyzer/src/main/java/org/onosproject/flowanalyzer/FlowAnalyzer.java
index 9f899ac..990ec45 100644
--- a/apps/flowanalyzer/src/main/java/org/onosproject/flowanalyzer/FlowAnalyzer.java
+++ b/apps/flowanalyzer/src/main/java/org/onosproject/flowanalyzer/FlowAnalyzer.java
@@ -15,34 +15,33 @@
  */
 package org.onosproject.flowanalyzer;
 
-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.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.HostId;
+import org.onosproject.net.Link;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.flow.FlowEntry;
 import org.onosproject.net.flow.FlowRuleService;
-import org.onosproject.net.DeviceId;
-import org.onosproject.net.HostId;
 import org.onosproject.net.flow.criteria.Criteria;
 import org.onosproject.net.flow.criteria.Criterion;
 import org.onosproject.net.flow.criteria.PortCriterion;
 import org.onosproject.net.flow.instructions.Instruction;
 import org.onosproject.net.flow.instructions.Instructions;
-import org.onosproject.net.topology.TopologyService;
-import org.onosproject.net.topology.TopologyGraph;
 import org.onosproject.net.link.LinkService;
-import org.onosproject.net.Link;
+import org.onosproject.net.topology.TopologyGraph;
+import org.onosproject.net.topology.TopologyService;
 import org.onosproject.net.topology.TopologyVertex;
 import org.osgi.service.component.ComponentContext;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
@@ -51,19 +50,18 @@
 /**
  * Simple flow space analyzer app.
  */
-@Component(immediate = true)
-@Service(value = FlowAnalyzer.class)
+@Component(immediate = true, service = FlowAnalyzer.class)
 public class FlowAnalyzer {
 
     private final Logger log = getLogger(getClass());
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected FlowRuleService flowRuleService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected TopologyService topologyService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected LinkService linkService;
 
     @Activate