Add group rule service, purge flood rules, use group to handle ARP

Change-Id: If0db889d6ab28a4d36f433f16bf84241d2726045
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/Constants.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/Constants.java
index 6475a7a..891b1ee 100644
--- a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/Constants.java
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/Constants.java
@@ -68,7 +68,6 @@
     public static final String UNSUPPORTED_VENDOR = "unsupported_vendor";
 
     public static final int PRIORITY_TUNNEL_TAG_RULE = 30000;
-    public static final int PRIORITY_FLOATING_INTERNAL = 42000;
     public static final int PRIORITY_FLOATING_EXTERNAL = 41000;
     public static final int PRIORITY_STATEFUL_SNAT_RULE = 40500;
     public static final int PRIORITY_ICMP_RULE = 43000;
@@ -79,7 +78,6 @@
     public static final int PRIORITY_SNAT_RULE = 26000;
     public static final int PRIORITY_SWITCHING_RULE = 30000;
     public static final int PRIORITY_FLAT_JUMP_UPSTREAM_RULE = 41000;
-    public static final int PRIORITY_FLAT_JUMP_DOWNSTREAM_RULE = 41000;
     public static final int PRIORITY_FLAT_UPSTREAM_RULE = 41000;
     public static final int PRIORITY_FLAT_DOWNSTREAM_RULE = 42000;
     public static final int PRIORITY_DHCP_RULE = 42000;
@@ -90,11 +88,10 @@
     public static final int PRIORITY_CT_RULE = 32000;
     public static final int PRIORITY_CT_DROP_RULE = 32500;
     public static final int PRIORITY_ARP_GATEWAY_RULE = 41000;
-    public static final int PRIORITY_ARP_SUBNET_RULE = 40000;
     public static final int PRIORITY_ARP_CONTROL_RULE = 40000;
     public static final int PRIORITY_ARP_REPLY_RULE = 40000;
     public static final int PRIORITY_ARP_REQUEST_RULE = 40000;
-    public static final int PRIORITY_ARP_FLOOD_RULE = 39000;
+    public static final int PRIORITY_ARP_GROUP_RULE = 39000;
     public static final int PRIORITY_FORCED_ACL_RULE = 50000;
     public static final int PRIORITY_ICMP_PROBE_RULE = 50000;
 
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackGroupRuleService.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackGroupRuleService.java
new file mode 100644
index 0000000..4a0df58
--- /dev/null
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackGroupRuleService.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+ *
+ * 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.openstacknetworking.api;
+
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.group.GroupBucket;
+import org.onosproject.net.group.GroupDescription;
+
+import java.util.List;
+
+/**
+ * Service for setting group rules.
+ */
+public interface OpenstackGroupRuleService {
+
+    /**
+     * Configures the group table rule.
+     *
+     * @param appId         application ID
+     * @param deviceId      device ID
+     * @param groupId       group ID
+     * @param type          group type
+     * @param buckets       a list of group buckets
+     * @param install       true for rule addition, false for rule removal
+     */
+    void setRule(ApplicationId appId, DeviceId deviceId, int groupId,
+                 GroupDescription.Type type, List<GroupBucket> buckets, boolean install);
+
+    /**
+     * Checks whether has the group in store with given device ID and group ID.
+     *
+     * @param deviceId      device ID
+     * @param groupId       group ID
+     * @return true if the group exists, false otherwise
+     */
+    boolean hasGroup(DeviceId deviceId, int groupId);
+
+    /**
+     * Configures buckets to the existing group.
+     * With install flag true, this method will add buckets to existing buckets,
+     * while with install flag false, this method will remove buckets from
+     * existing buckets.
+     *
+     * @param appId         application ID
+     * @param deviceId      device ID
+     * @param groupId       group ID
+     * @param buckets       a list of group buckets
+     * @param install       true for buckets addition, false for buckets removal
+     */
+    void setBuckets(ApplicationId appId, DeviceId deviceId, int groupId,
+                    List<GroupBucket> buckets, boolean install);
+
+    /**
+     * Configures buckets.
+     *
+     * @param appId         application ID
+     * @param deviceId      device ID
+     * @param groupId       group ID
+     * @param buckets       a lit of group buckets
+     */
+    void setBuckets(ApplicationId appId, DeviceId deviceId, int groupId,
+                    List<GroupBucket> buckets);
+}