Merge "Remove unused code"
[controller.git] / opendaylight / forwardingrulesmanager / implementation / src / main / java / org / opendaylight / controller / forwardingrulesmanager / internal / ForwardingRulesManager.java
index 3d6a0292ef67225079b11759a3560bdfddf85377..f7b647dd721a1f1f9117d95bc3723867574e5064 100644 (file)
@@ -33,7 +33,9 @@ import org.opendaylight.controller.clustering.services.CacheExistException;
 import org.opendaylight.controller.clustering.services.ICacheUpdateAware;
 import org.opendaylight.controller.clustering.services.IClusterContainerServices;
 import org.opendaylight.controller.clustering.services.IClusterServices;
+import org.opendaylight.controller.configuration.ConfigurationObject;
 import org.opendaylight.controller.configuration.IConfigurationContainerAware;
+import org.opendaylight.controller.configuration.IConfigurationContainerService;
 import org.opendaylight.controller.connectionmanager.IConnectionManager;
 import org.opendaylight.controller.containermanager.IContainerManager;
 import org.opendaylight.controller.forwardingrulesmanager.FlowConfig;
@@ -48,6 +50,9 @@ import org.opendaylight.controller.forwardingrulesmanager.PortGroupProvider;
 import org.opendaylight.controller.forwardingrulesmanager.implementation.data.FlowEntryDistributionOrder;
 import org.opendaylight.controller.sal.action.Action;
 import org.opendaylight.controller.sal.action.ActionType;
+import org.opendaylight.controller.sal.action.Enqueue;
+import org.opendaylight.controller.sal.action.Flood;
+import org.opendaylight.controller.sal.action.FloodAll;
 import org.opendaylight.controller.sal.action.Output;
 import org.opendaylight.controller.sal.connection.ConnectionLocality;
 import org.opendaylight.controller.sal.core.Config;
@@ -66,8 +71,6 @@ import org.opendaylight.controller.sal.match.MatchType;
 import org.opendaylight.controller.sal.utils.EtherTypes;
 import org.opendaylight.controller.sal.utils.GlobalConstants;
 import org.opendaylight.controller.sal.utils.IObjectReader;
-import org.opendaylight.controller.sal.utils.ObjectReader;
-import org.opendaylight.controller.sal.utils.ObjectWriter;
 import org.opendaylight.controller.sal.utils.Status;
 import org.opendaylight.controller.sal.utils.StatusCode;
 import org.opendaylight.controller.switchmanager.IInventoryListener;
@@ -98,14 +101,15 @@ public class ForwardingRulesManager implements
     private static final String PORT_REMOVED = "Port removed";
     private static final String NODE_DOWN = "Node is Down";
     private static final String INVALID_FLOW_ENTRY = "Invalid FlowEntry";
-    private String frmFileName;
-    private String portGroupFileName;
+    private static final String STATIC_FLOWS_FILE_NAME = "frm_staticflows.conf";
+    private static final String PORT_GROUP_FILE_NAME = "portgroup.conf";
     private ConcurrentMap<Integer, FlowConfig> staticFlows;
     private ConcurrentMap<Integer, Integer> staticFlowsOrdinal;
     private ConcurrentMap<String, PortGroupConfig> portGroupConfigs;
     private ConcurrentMap<PortGroupConfig, Map<Node, PortGroup>> portGroupData;
     private ConcurrentMap<String, Object> TSPolicies;
     private IContainerManager containerManager;
+    private IConfigurationContainerService configurationService;
     private boolean inContainerMode; // being used by global instance only
     protected boolean stopping;
 
@@ -242,6 +246,57 @@ public class ForwardingRulesManager implements
         return null;
     }
 
+    /**
+     * Checks if the FlowEntry targets are valid for this container
+     *
+     * @param flowEntry
+     *            The flow entry to test
+     * @return a Status object representing the result of the validation
+     */
+    private Status validateEntry(FlowEntry flowEntry) {
+        // Node presence check
+        Node node = flowEntry.getNode();
+        if (!switchManager.getNodes().contains(node)) {
+            return new Status(StatusCode.BADREQUEST, String.format("Node %s is not present in this container", node));
+        }
+
+        // Ports and actions validation check
+        Flow flow = flowEntry.getFlow();
+        Match match = flow.getMatch();
+        if (match.isPresent(MatchType.IN_PORT)) {
+            NodeConnector inputPort = (NodeConnector)match.getField(MatchType.IN_PORT).getValue();
+            if (!switchManager.getNodeConnectors(node).contains(inputPort)) {
+                String msg = String.format("Ingress port %s is not present on this container", inputPort);
+                return new Status(StatusCode.BADREQUEST, msg);
+            }
+        }
+        for (Action action : flow.getActions()) {
+            if (action instanceof Flood && !GlobalConstants.DEFAULT.toString().equals(getContainerName())) {
+                return new Status(StatusCode.BADREQUEST, String.format("Flood is only allowed in default container"));
+            }
+            if (action instanceof FloodAll && !GlobalConstants.DEFAULT.toString().equals(getContainerName())) {
+                return new Status(StatusCode.BADREQUEST, String.format("FloodAll is only allowed in default container"));
+            }
+            if (action instanceof Output) {
+                Output out = (Output)action;
+                NodeConnector outputPort = out.getPort();
+                if (!switchManager.getNodeConnectors(node).contains(outputPort)) {
+                    String msg = String.format("Output port %s is not present on this container", outputPort);
+                    return new Status(StatusCode.BADREQUEST, msg);
+                }
+            }
+            if (action instanceof Enqueue) {
+                Enqueue out = (Enqueue)action;
+                NodeConnector outputPort = out.getPort();
+                if (!switchManager.getNodeConnectors(node).contains(outputPort)) {
+                    String msg = String.format("Enqueue port %s is not present on this container", outputPort);
+                    return new Status(StatusCode.BADREQUEST, msg);
+                }
+            }
+        }
+        return new Status(StatusCode.SUCCESS);
+    }
+
     /**
      * Adds a flow entry onto the network node It runs various validity checks
      * and derive the final container flows merged entries that will be
@@ -263,6 +318,15 @@ public class ForwardingRulesManager implements
             return new Status(StatusCode.NOTACCEPTABLE, INVALID_FLOW_ENTRY);
         }
 
+        // Operational check: input, output and queue ports presence check and
+        // action validation for this container
+        Status status = validateEntry(flowEntry);
+        if (!status.isSuccess()) {
+            String msg = String.format("%s: %s", INVALID_FLOW_ENTRY, status.getDescription());
+            log.warn("{}: {}", msg, flowEntry);
+            return new Status(StatusCode.NOTACCEPTABLE, msg);
+        }
+
         /*
          * Redundant Check: Check if the request is a redundant one from the
          * same application the flowEntry is equal to an existing one. Given we
@@ -330,7 +394,7 @@ public class ForwardingRulesManager implements
         for (FlowEntryInstall installEntry : toInstallSafe) {
 
             // Install and update database
-            Status ret = addEntriesInternal(installEntry, async);
+            Status ret = addEntryInternal(installEntry, async);
 
             if (ret.isSuccess()) {
                 oneSucceded = true;
@@ -421,6 +485,15 @@ public class ForwardingRulesManager implements
             return new Status(StatusCode.SUCCESS, msg);
         }
 
+        // Operational check: input, output and queue ports presence check and
+        // action validation for this container
+        Status status = validateEntry(newFlowEntry);
+        if (!status.isSuccess()) {
+            String msg = String.format("Modify: %s: %s", INVALID_FLOW_ENTRY, status.getDescription());
+            log.warn("{}: {}", msg, newFlowEntry);
+            return new Status(StatusCode.NOTACCEPTABLE, msg);
+        }
+
         /*
          * Conflict Check: Verify the new entry would not conflict with an
          * existing one. This is a loose check on the previous original flow
@@ -467,7 +540,7 @@ public class ForwardingRulesManager implements
         Status succeeded = null;
         boolean decouple = false;
         if (installedList.size() != toInstallList.size()) {
-            log.info("Modify: New flow entry does not satisfy the same "
+            log.trace("Modify: New flow entry does not satisfy the same "
                     + "number of container flows as the original entry does");
             decouple = true;
         }
@@ -479,7 +552,7 @@ public class ForwardingRulesManager implements
              */
             FlowEntryInstall sameMatchEntry = installedSwView.get(installEntry);
             if (sameMatchEntry != null && !sameMatchEntry.getOriginal().equals(currentFlowEntry)) {
-                log.info("Modify: new container flow merged flow entry clashes with existing flow");
+                log.trace("Modify: new container flow merged flow entry clashes with existing flow");
                 decouple = true;
             } else {
                 toInstallSafe.add(installEntry);
@@ -493,7 +566,7 @@ public class ForwardingRulesManager implements
             }
             // Install new entries
             for (FlowEntryInstall newEntry : toInstallSafe) {
-                succeeded = this.addEntriesInternal(newEntry, async);
+                succeeded = this.addEntryInternal(newEntry, async);
             }
         } else {
             /*
@@ -553,7 +626,9 @@ public class ForwardingRulesManager implements
     /**
      * This is the function that modifies the final container flows merged
      * entries on the network node and update the database. It expects that all
-     * the validity checks are passed
+     * the validity checks are passed.
+     * This function is supposed to be called only on the controller on which
+     * the IFRM call is executed.
      *
      * @param currentEntries
      * @param newEntries
@@ -563,13 +638,13 @@ public class ForwardingRulesManager implements
      *         contain the unique id assigned to this request
      */
     private Status modifyEntryInternal(FlowEntryInstall currentEntries, FlowEntryInstall newEntries, boolean async) {
+        Status status = new Status(StatusCode.UNDEFINED);
         FlowEntryDistributionOrderFutureTask futureStatus =
                 distributeWorkOrder(currentEntries, newEntries, UpdateType.CHANGED);
         if (futureStatus != null) {
-            Status retStatus = new Status(StatusCode.UNDEFINED);
             try {
-                retStatus = futureStatus.get();
-                if (retStatus.getCode()
+                status = futureStatus.get();
+                if (status.getCode()
                         .equals(StatusCode.TIMEOUT)) {
                     // A timeout happened, lets cleanup the workMonitor
                     workMonitor.remove(futureStatus.getOrder());
@@ -579,30 +654,31 @@ public class ForwardingRulesManager implements
             } catch (ExecutionException e) {
                 log.error("", e);
             }
-            return retStatus;
         } else {
             // Modify the flow on the network node
-            Status status = async ? programmer.modifyFlowAsync(currentEntries.getNode(), currentEntries.getInstall()
-                    .getFlow(), newEntries.getInstall()
-                    .getFlow()) : programmer.modifyFlow(currentEntries.getNode(), currentEntries.getInstall()
-                    .getFlow(), newEntries.getInstall()
-                    .getFlow());
+            status = modifyEntryInHw(currentEntries, newEntries, async);
+        }
 
-            if (!status.isSuccess()) {
-                log.trace("SDN Plugin failed to program the flow: {}. The failure is: {}", newEntries.getInstall(),
-                        status.getDescription());
-                return status;
-            }
+        if (!status.isSuccess()) {
+            log.trace("{} SDN Plugin failed to program the flow: {}. The failure is: {}",
+                    (futureStatus != null) ? "Remote" : "Local", newEntries.getInstall(), status.getDescription());
+            return status;
+        }
 
-            log.trace("Modified {} => {}", currentEntries.getInstall(), newEntries.getInstall());
+        log.trace("Modified {} => {}", currentEntries.getInstall(), newEntries.getInstall());
 
-            // Update DB
-            newEntries.setRequestId(status.getRequestId());
-            updateSwViews(currentEntries, false);
-            updateSwViews(newEntries, true);
+        // Update DB
+        newEntries.setRequestId(status.getRequestId());
+        updateSwViews(currentEntries, false);
+        updateSwViews(newEntries, true);
 
-            return status;
-        }
+        return status;
+    }
+
+    private Status modifyEntryInHw(FlowEntryInstall currentEntries, FlowEntryInstall newEntries, boolean async) {
+        return async ? programmer.modifyFlowAsync(currentEntries.getNode(), currentEntries.getInstall().getFlow(),
+                newEntries.getInstall().getFlow()) : programmer.modifyFlow(currentEntries.getNode(), currentEntries
+                .getInstall().getFlow(), newEntries.getInstall().getFlow());
     }
 
     /**
@@ -671,6 +747,8 @@ public class ForwardingRulesManager implements
      * This is the function that removes the final container flows merged entry
      * from the network node and update the database. It expects that all the
      * validity checks are passed
+     * This function is supposed to be called only on the controller on which
+     * the IFRM call is executed.
      *
      * @param entry
      *            the flow entry to remove
@@ -680,13 +758,12 @@ public class ForwardingRulesManager implements
      *         contain the unique id assigned to this request
      */
     private Status removeEntryInternal(FlowEntryInstall entry, boolean async) {
+        Status status = new Status(StatusCode.UNDEFINED);
         FlowEntryDistributionOrderFutureTask futureStatus = distributeWorkOrder(entry, null, UpdateType.REMOVED);
         if (futureStatus != null) {
-            Status retStatus = new Status(StatusCode.UNDEFINED);
             try {
-                retStatus = futureStatus.get();
-                if (retStatus.getCode()
-                        .equals(StatusCode.TIMEOUT)) {
+                status = futureStatus.get();
+                if (status.getCode().equals(StatusCode.TIMEOUT)) {
                     // A timeout happened, lets cleanup the workMonitor
                     workMonitor.remove(futureStatus.getOrder());
                 }
@@ -695,28 +772,31 @@ public class ForwardingRulesManager implements
             } catch (ExecutionException e) {
                 log.error("", e);
             }
-            return retStatus;
         } else {
             // Mark the entry to be deleted (for CC just in case we fail)
             entry.toBeDeleted();
 
             // Remove from node
-            Status status = async ? programmer.removeFlowAsync(entry.getNode(), entry.getInstall()
-                    .getFlow()) : programmer.removeFlow(entry.getNode(), entry.getInstall()
-                    .getFlow());
-
-            if (!status.isSuccess()) {
-                log.trace("SDN Plugin failed to remove the flow: {}. The failure is: {}", entry.getInstall(),
-                        status.getDescription());
-                return status;
-            }
-            log.trace("Removed  {}", entry.getInstall());
-
-            // Update DB
-            updateSwViews(entry, false);
+            status = removeEntryInHw(entry, async);
+        }
 
+        if (!status.isSuccess()) {
+            log.trace("{} SDN Plugin failed to remove the flow: {}. The failure is: {}",
+                    (futureStatus != null) ? "Remote" : "Local", entry.getInstall(), status.getDescription());
             return status;
         }
+
+        log.trace("Removed  {}", entry.getInstall());
+
+        // Update DB
+        updateSwViews(entry, false);
+
+        return status;
+    }
+
+    private Status removeEntryInHw(FlowEntryInstall entry, boolean async) {
+        return async ? programmer.removeFlowAsync(entry.getNode(), entry.getInstall().getFlow()) : programmer
+                .removeFlow(entry.getNode(), entry.getInstall().getFlow());
     }
 
     /**
@@ -724,6 +804,8 @@ public class ForwardingRulesManager implements
      * on the network node and updates the database. It expects that all the
      * validity and conflict checks are passed. That means it does not check
      * whether this flow would conflict or overwrite an existing one.
+     * This function is supposed to be called only on the controller on which
+     * the IFRM call is executed.
      *
      * @param entry
      *            the flow entry to install
@@ -732,14 +814,13 @@ public class ForwardingRulesManager implements
      * @return the status of this request. In case of asynchronous call, it will
      *         contain the unique id assigned to this request
      */
-    private Status addEntriesInternal(FlowEntryInstall entry, boolean async) {
+    private Status addEntryInternal(FlowEntryInstall entry, boolean async) {
+        Status status = new Status(StatusCode.UNDEFINED);
         FlowEntryDistributionOrderFutureTask futureStatus = distributeWorkOrder(entry, null, UpdateType.ADDED);
         if (futureStatus != null) {
-            Status retStatus = new Status(StatusCode.UNDEFINED);
             try {
-                retStatus = futureStatus.get();
-                if (retStatus.getCode()
-                        .equals(StatusCode.TIMEOUT)) {
+                status = futureStatus.get();
+                if (status.getCode().equals(StatusCode.TIMEOUT)) {
                     // A timeout happened, lets cleanup the workMonitor
                     workMonitor.remove(futureStatus.getOrder());
                 }
@@ -748,27 +829,29 @@ public class ForwardingRulesManager implements
             } catch (ExecutionException e) {
                 log.error("", e);
             }
-            return retStatus;
         } else {
-            // Install the flow on the network node
-            Status status = async ? programmer.addFlowAsync(entry.getNode(), entry.getInstall()
-                    .getFlow()) : programmer.addFlow(entry.getNode(), entry.getInstall()
-                    .getFlow());
+            status = addEntryInHw(entry, async);
+        }
 
-            if (!status.isSuccess()) {
-                log.trace("SDN Plugin failed to program the flow: {}. The failure is: {}", entry.getInstall(),
-                        status.getDescription());
-                return status;
-            }
+        if (!status.isSuccess()) {
+            log.trace("{} SDN Plugin failed to program the flow: {}. The failure is: {}",
+                    (futureStatus != null) ? "Remote" : "Local", entry.getInstall(), status.getDescription());
+            return status;
+        }
 
-            log.trace("Added    {}", entry.getInstall());
+        log.trace("Added    {}", entry.getInstall());
 
-            // Update DB
-            entry.setRequestId(status.getRequestId());
-            updateSwViews(entry, true);
+        // Update DB
+        entry.setRequestId(status.getRequestId());
+        updateSwViews(entry, true);
 
-            return status;
-        }
+        return status;
+    }
+
+    private Status addEntryInHw(FlowEntryInstall entry, boolean async) {
+        // Install the flow on the network node
+        return async ? programmer.addFlowAsync(entry.getNode(), entry.getInstall().getFlow()) : programmer.addFlow(
+                entry.getNode(), entry.getInstall().getFlow());
     }
 
     /**
@@ -1110,7 +1193,10 @@ public class ForwardingRulesManager implements
             List<FlowEntryInstall> list = new ArrayList<FlowEntryInstall>(groupFlows.get(groupName));
             toBeRemoved = list.size();
             for (FlowEntryInstall entry : list) {
-                Status status = this.removeEntry(entry.getOriginal(), false);
+                // since this is the entry that was stored in groupFlows
+                // it is already validated and merged
+                // so can call removeEntryInternal directly
+                Status status = this.removeEntryInternal(entry, false);
                 if (status.isSuccess()) {
                     toBeRemoved -= 1;
                 } else {
@@ -1263,7 +1349,7 @@ public class ForwardingRulesManager implements
                 }
                 Status error = modifyEntry(currentFlowEntry, newFlowEntry, false);
                 if (error.isSuccess()) {
-                    log.info("Ports {} added to FlowEntry {}", portList, flowName);
+                    log.trace("Ports {} added to FlowEntry {}", portList, flowName);
                 } else {
                     log.warn("Failed to add ports {} to Flow entry {}. The failure is: {}", portList,
                             currentFlowEntry.toString(), error.getDescription());
@@ -1287,7 +1373,7 @@ public class ForwardingRulesManager implements
                 }
                 Status status = modifyEntry(currentFlowEntry, newFlowEntry, false);
                 if (status.isSuccess()) {
-                    log.info("Ports {} removed from FlowEntry {}", portList, flowName);
+                    log.trace("Ports {} removed from FlowEntry {}", portList, flowName);
                 } else {
                     log.warn("Failed to remove ports {} from Flow entry {}. The failure is: {}", portList,
                             currentFlowEntry.toString(), status.getDescription());
@@ -1335,7 +1421,7 @@ public class ForwardingRulesManager implements
         Status status = modifyEntry(currentFlowEntry, newFlowEntry, false);
 
         if (status.isSuccess()) {
-            log.info("Output port replaced with {} for flow {} on node {}", outPort, flowName, node);
+            log.trace("Output port replaced with {} for flow {} on node {}", outPort, flowName, node);
         } else {
             log.warn("Failed to replace output port for flow {} on node {}. The failure is: {}", flowName, node,
                     status.getDescription());
@@ -1504,15 +1590,25 @@ public class ForwardingRulesManager implements
 
     @Override
     public Status addStaticFlow(FlowConfig config) {
+        return addStaticFlow(config, false);
+    }
+
+    private Status addStaticFlow(FlowConfig config, boolean async) {
         // Configuration object validation
-        Status status = config.validate(container);
+        Status status = config.validate();
         if (!status.isSuccess()) {
             log.warn("Invalid Configuration for flow {}. The failure is {}", config, status.getDescription());
             String error = "Invalid Configuration (" + status.getDescription() + ")";
             config.setStatus(error);
             return new Status(StatusCode.BADREQUEST, error);
         }
-        return addStaticFlowInternal(config, false);
+        return addStaticFlowInternal(config, async, false);
+    }
+
+
+    @Override
+    public Status addStaticFlowAsync(FlowConfig config) {
+        return addStaticFlow(config, true);
     }
 
     /**
@@ -1530,7 +1626,7 @@ public class ForwardingRulesManager implements
      *            installation on the network node was successful
      * @return The status of this request
      */
-    private Status addStaticFlowInternal(FlowConfig config, boolean restore) {
+    private Status addStaticFlowInternal(FlowConfig config, boolean async, boolean restore) {
         boolean multipleFlowPush = false;
         String error;
         Status status;
@@ -1567,7 +1663,7 @@ public class ForwardingRulesManager implements
             // Program hw
             if (config.installInHw()) {
                 FlowEntry entry = config.getFlowEntry();
-                status = this.installFlowEntry(entry);
+                status = async ? this.installFlowEntryAsync(entry) : this.installFlowEntry(entry);
                 if (!status.isSuccess()) {
                     config.setStatus(status.getDescription());
                     if (!restore) {
@@ -1669,6 +1765,7 @@ public class ForwardingRulesManager implements
                     config.setStatus(StatusCode.SUCCESS.toString());
                     break;
                 default:
+                    break;
                 }
             }
         }
@@ -1678,6 +1775,15 @@ public class ForwardingRulesManager implements
 
     @Override
     public Status removeStaticFlow(FlowConfig config) {
+        return removeStaticFlow(config, false);
+    }
+
+    @Override
+    public Status removeStaticFlowAsync(FlowConfig config) {
+        return removeStaticFlow(config, true);
+    }
+
+    private Status removeStaticFlow(FlowConfig config, boolean async) {
         /*
          * No config.isInternal() check as NB does not take this path and GUI
          * cannot issue a delete on an internal generated flow. We need this
@@ -1701,7 +1807,8 @@ public class ForwardingRulesManager implements
         }
 
         // Program the network node
-        Status status = this.uninstallFlowEntry(config.getFlowEntry());
+        Status status = async ? this.uninstallFlowEntryAsync(config.getFlowEntry()) : this.uninstallFlowEntry(config
+                .getFlowEntry());
 
         // Update configuration database if programming was successful
         if (status.isSuccess()) {
@@ -1713,6 +1820,15 @@ public class ForwardingRulesManager implements
 
     @Override
     public Status removeStaticFlow(String name, Node node) {
+       return removeStaticFlow(name, node, false);
+    }
+
+    @Override
+    public Status removeStaticFlowAsync(String name, Node node) {
+        return removeStaticFlow(name, node, true);
+    }
+
+    private Status removeStaticFlow(String name, Node node, boolean async) {
         // Look for the target configuration entry
         Integer key = 0;
         FlowConfig target = null;
@@ -1743,7 +1859,7 @@ public class ForwardingRulesManager implements
         }
 
         // Program the network node
-        Status status = this.removeEntry(target.getFlowEntry(), false);
+        Status status = this.removeEntry(target.getFlowEntry(), async);
 
         // Update configuration database if programming was successful
         if (status.isSuccess()) {
@@ -1764,7 +1880,7 @@ public class ForwardingRulesManager implements
         }
 
         // Validity Check
-        Status status = newFlowConfig.validate(container);
+        Status status = newFlowConfig.validate();
         if (!status.isSuccess()) {
             String msg = "Invalid Configuration (" + status.getDescription() + ")";
             newFlowConfig.setStatus(msg);
@@ -1793,7 +1909,7 @@ public class ForwardingRulesManager implements
         // Do not attempt to reinstall the flow, warn user
         if (newFlowConfig.equals(oldFlowConfig)) {
             String msg = "No modification detected";
-            log.info("Static flow modification skipped. New flow and old flow are the same: {}", newFlowConfig);
+            log.trace("Static flow modification skipped. New flow and old flow are the same: {}", newFlowConfig);
             return new Status(StatusCode.SUCCESS, msg);
         }
 
@@ -1844,7 +1960,7 @@ public class ForwardingRulesManager implements
             }
         }
         if (target != null) {
-            Status status = target.validate(container);
+            Status status = target.validate();
             if (!status.isSuccess()) {
                 log.warn(status.getDescription());
                 return status;
@@ -1895,7 +2011,7 @@ public class ForwardingRulesManager implements
      *            inactive list
      */
     private void uninstallAllFlowEntries(boolean preserveFlowEntries) {
-        log.info("Uninstalling all non-internal flows");
+        log.trace("Uninstalling all non-internal flows");
 
         List<FlowEntryInstall> toRemove = new ArrayList<FlowEntryInstall>();
 
@@ -1933,7 +2049,7 @@ public class ForwardingRulesManager implements
      * default container instance of FRM only when the last container is deleted
      */
     private void reinstallAllFlowEntries() {
-        log.info("Reinstalling all inactive flows");
+        log.trace("Reinstalling all inactive flows");
 
         for (FlowEntry flowEntry : this.inactiveFlows.keySet()) {
             this.addEntry(flowEntry, false);
@@ -1945,22 +2061,7 @@ public class ForwardingRulesManager implements
 
     @Override
     public List<FlowConfig> getStaticFlows() {
-        return getStaticFlowsOrderedList(staticFlows, staticFlowsOrdinal.get(0).intValue());
-    }
-
-    // TODO: need to come out with a better algorithm for maintaining the order
-    // of the configuration entries
-    // with actual one, index associated to deleted entries cannot be reused and
-    // map grows...
-    private List<FlowConfig> getStaticFlowsOrderedList(ConcurrentMap<Integer, FlowConfig> flowMap, int maxKey) {
-        List<FlowConfig> orderedList = new ArrayList<FlowConfig>();
-        for (int i = 0; i <= maxKey; i++) {
-            FlowConfig entry = flowMap.get(i);
-            if (entry != null) {
-                orderedList.add(entry);
-            }
-        }
-        return orderedList;
+        return new ArrayList<FlowConfig>(staticFlows.values());
     }
 
     @Override
@@ -2003,34 +2104,13 @@ public class ForwardingRulesManager implements
         return new ArrayList<Node>(set);
     }
 
-    @SuppressWarnings("unchecked")
     private void loadFlowConfiguration() {
-        ObjectReader objReader = new ObjectReader();
-        ConcurrentMap<Integer, FlowConfig> confList = (ConcurrentMap<Integer, FlowConfig>) objReader.read(this,
-                frmFileName);
-
-        ConcurrentMap<String, PortGroupConfig> pgConfig = (ConcurrentMap<String, PortGroupConfig>) objReader.read(this,
-                portGroupFileName);
-
-        if (pgConfig != null) {
-            for (ConcurrentMap.Entry<String, PortGroupConfig> entry : pgConfig.entrySet()) {
-                addPortGroupConfig(entry.getKey(), entry.getValue().getMatchString(), true);
-            }
+        for (ConfigurationObject conf : configurationService.retrieveConfiguration(this, PORT_GROUP_FILE_NAME)) {
+            addPortGroupConfig(((PortGroupConfig) conf).getName(), ((PortGroupConfig) conf).getMatchString(), true);
         }
 
-        if (confList == null) {
-            return;
-        }
-
-        int maxKey = 0;
-        for (Integer key : confList.keySet()) {
-            if (key.intValue() > maxKey) {
-                maxKey = key.intValue();
-            }
-        }
-
-        for (FlowConfig conf : getStaticFlowsOrderedList(confList, maxKey)) {
-            addStaticFlowInternal(conf, true);
+        for (ConfigurationObject conf : configurationService.retrieveConfiguration(this, STATIC_FLOWS_FILE_NAME)) {
+            addStaticFlowInternal((FlowConfig) conf, false, true);
         }
     }
 
@@ -2045,25 +2125,44 @@ public class ForwardingRulesManager implements
     }
 
     private Status saveConfigInternal() {
-        ObjectWriter objWriter = new ObjectWriter();
-        ConcurrentMap<Integer, FlowConfig> nonDynamicFlows = new ConcurrentHashMap<Integer, FlowConfig>();
+        List<ConfigurationObject> nonDynamicFlows = new ArrayList<ConfigurationObject>();
+
         for (Integer ordinal : staticFlows.keySet()) {
             FlowConfig config = staticFlows.get(ordinal);
             // Do not save dynamic and controller generated static flows
             if (config.isDynamic() || config.isInternalFlow()) {
                 continue;
             }
-            nonDynamicFlows.put(ordinal, config);
+            nonDynamicFlows.add(config);
         }
-        objWriter.write(nonDynamicFlows, frmFileName);
-        objWriter.write(new ConcurrentHashMap<String, PortGroupConfig>(portGroupConfigs), portGroupFileName);
-        return new Status(StatusCode.SUCCESS, null);
+
+        configurationService.persistConfiguration(nonDynamicFlows, STATIC_FLOWS_FILE_NAME);
+        configurationService.persistConfiguration(new ArrayList<ConfigurationObject>(portGroupConfigs.values()),
+                PORT_GROUP_FILE_NAME);
+
+        return new Status(StatusCode.SUCCESS);
     }
 
     @Override
     public void subnetNotify(Subnet sub, boolean add) {
     }
 
+    private boolean programInternalFlow(boolean proactive, FlowConfig fc) {
+        boolean retVal = true; // program flows unless determined otherwise
+        if(proactive) {
+            // if the flow already exists do not program
+            if(flowConfigExists(fc)) {
+                retVal = false;
+            }
+        } else {
+            // if the flow does not exist do not program
+            if(!flowConfigExists(fc)) {
+                retVal = false;
+            }
+        }
+        return retVal;
+    }
+
     /**
      * (non-Javadoc)
      *
@@ -2118,14 +2217,20 @@ public class ForwardingRulesManager implements
                 dropAllConfig.setActions(dropAction);
                 defaultConfigs.add(dropAllConfig);
 
-                log.info("Forwarding mode for node {} set to {}", node, (proactive ? "proactive" : "reactive"));
+                log.trace("Forwarding mode for node {} set to {}", node, (proactive ? "proactive" : "reactive"));
                 for (FlowConfig fc : defaultConfigs) {
-                    Status status = (proactive) ? addStaticFlowInternal(fc, false) : removeStaticFlow(fc);
-                    if (status.isSuccess()) {
-                        log.info("{} Proactive Static flow: {}", (proactive ? "Installed" : "Removed"), fc.getName());
+                    // check if the frm really needs to act on the notification.
+                    // this is to check against duplicate notifications
+                    if(programInternalFlow(proactive, fc)) {
+                        Status status = (proactive) ? addStaticFlowInternal(fc, false, false) : removeStaticFlow(fc);
+                        if (status.isSuccess()) {
+                            log.trace("{} Proactive Static flow: {}", (proactive ? "Installed" : "Removed"), fc.getName());
+                        } else {
+                            log.warn("Failed to {} Proactive Static flow: {}", (proactive ? "install" : "remove"),
+                                    fc.getName());
+                        }
                     } else {
-                        log.warn("Failed to {} Proactive Static flow: {}", (proactive ? "install" : "remove"),
-                                fc.getName());
+                        log.debug("Got redundant install request for internal flow: {} on node: {}. Request not sent to FRM.", fc.getName(), node);
                     }
                 }
                 return new Status(StatusCode.SUCCESS);
@@ -2145,7 +2250,7 @@ public class ForwardingRulesManager implements
      * @param node
      */
     private void cleanDatabaseForNode(Node node) {
-        log.info("Cleaning Flow database for Node {}", node);
+        log.trace("Cleaning Flow database for Node {}", node);
         if (nodeFlows.containsKey(node)) {
             List<FlowEntryInstall> toRemove = new ArrayList<FlowEntryInstall>(nodeFlows.get(node));
 
@@ -2300,7 +2405,7 @@ public class ForwardingRulesManager implements
             if ((staticFlow.getNode().equals(node)) && (staticFlow.getPortGroup().equals(config.getName()))) {
                 for (Short port : data.getPorts()) {
                     FlowConfig derivedFlow = getDerivedFlowConfig(staticFlow, config.getName(), port);
-                    addStaticFlowInternal(derivedFlow, false);
+                    addStaticFlowInternal(derivedFlow, false, false);
                 }
             }
         }
@@ -2322,7 +2427,7 @@ public class ForwardingRulesManager implements
 
     @Override
     public void portGroupChanged(PortGroupConfig config, Map<Node, PortGroup> data, boolean add) {
-        log.info("PortGroup Changed for: {} Data: {}", config, portGroupData);
+        log.trace("PortGroup Changed for: {} Data: {}", config, portGroupData);
         Map<Node, PortGroup> existingData = portGroupData.get(config);
         if (existingData != null) {
             for (Map.Entry<Node, PortGroup> entry : data.entrySet()) {
@@ -2410,6 +2515,16 @@ public class ForwardingRulesManager implements
         }
     }
 
+    public void setConfigurationContainerService(IConfigurationContainerService service) {
+        log.trace("Got configuration service set request {}", service);
+        this.configurationService = service;
+    }
+
+    public void unsetConfigurationContainerService(IConfigurationContainerService service) {
+        log.trace("Got configuration service UNset request");
+        this.configurationService = null;
+    }
+
     @Override
     public PortGroupProvider getPortGroupProvider() {
         return portGroupProvider;
@@ -2460,8 +2575,6 @@ public class ForwardingRulesManager implements
      *
      */
     void init() {
-        frmFileName = GlobalConstants.STARTUPHOME.toString() + "frm_staticflows_" + this.getContainerName() + ".conf";
-        portGroupFileName = GlobalConstants.STARTUPHOME.toString() + "portgroup_" + this.getContainerName() + ".conf";
 
         inContainerMode = false;
 
@@ -2528,13 +2641,13 @@ public class ForwardingRulesManager implements
                                         FlowEntryInstall feiNew = workOrder.get(fe);
                                         switch (fe.getUpType()) {
                                         case ADDED:
-                                            gotStatus = addEntriesInternal(feiCurrent, false);
+                                            gotStatus = addEntryInHw(feiCurrent, false);
                                             break;
                                         case CHANGED:
-                                            gotStatus = modifyEntryInternal(feiCurrent, feiNew, false);
+                                            gotStatus = modifyEntryInHw(feiCurrent, feiNew, false);
                                             break;
                                         case REMOVED:
-                                            gotStatus = removeEntryInternal(feiCurrent, false);
+                                            gotStatus = removeEntryInHw(feiCurrent, false);
                                             break;
                                         }
                                         // Remove the Order
@@ -2631,12 +2744,16 @@ public class ForwardingRulesManager implements
         }
 
         /*
-         * Read startup and build database if we have not already gotten the
-         * configurations synced from another node
+         * Read startup and build database if we are the coordinator
          */
-        if (staticFlows.isEmpty()) {
-            loadFlowConfiguration();
-        }
+        loadFlowConfiguration();
+    }
+
+    /**
+     * Function called by the dependency manager before Container is Stopped and Destroyed.
+     */
+    public void containerStop() {
+        uninstallAllFlowEntries(false);
     }
 
     /**
@@ -2646,7 +2763,6 @@ public class ForwardingRulesManager implements
      */
     void stop() {
         stopping = true;
-        uninstallAllFlowEntries(false);
         // Shutdown executor
         this.executor.shutdownNow();
         // Now walk all the workMonitor and wake up the one sleeping because
@@ -2746,6 +2862,7 @@ public class ForwardingRulesManager implements
             this.reinstallAllFlowEntries();
             break;
         default:
+            break;
         }
 
         // Update our configuration DB
@@ -2988,7 +3105,11 @@ public class ForwardingRulesManager implements
                 // staticFlowEntry should never be null.
                 // the null check is just an extra defensive check.
                 if(staticFlowEntry != null) {
-                    staticFlows.remove(staticFlowEntry.getKey());
+                    // Modify status and update cluster cache
+                    log.debug("Updating static flow configuration on async error event");
+                    String status = String.format("Cannot be installed on node. reason: %s", errorString);
+                    staticFlowEntry.getValue().setStatus(status);
+                    refreshClusterStaticFlowsStatus(node);
                 }
             }
         }
@@ -3148,4 +3269,5 @@ public class ForwardingRulesManager implements
         }
         return list;
     }
+
 }