Modified bgp file name according to naming convention.
Change-Id: I403139b53fbc1a2dba894dfd39720707a52ba7cd
diff --git a/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpController.java b/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpController.java
new file mode 100755
index 0000000..79677e9
--- /dev/null
+++ b/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpController.java
@@ -0,0 +1,138 @@
+/*
+ * 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.bgp.controller;
+
+import java.util.Map;
+import java.util.Set;
+
+import org.onosproject.bgpio.exceptions.BgpParseException;
+import org.onosproject.bgpio.protocol.BgpMessage;
+
+/**
+ * Abstraction of an BGP controller. Serves as a one stop shop for obtaining BGP devices and (un)register listeners on
+ * bgp events
+ */
+public interface BgpController {
+
+ /**
+ * Returns list of bgp peers connected to this BGP controller.
+ *
+ * @return Iterable of BGPPeer elements
+ */
+ Iterable<BgpPeer> getPeers();
+
+ /**
+ * Returns the actual bgp peer for the given ip address.
+ *
+ * @param bgpId the id of the bgp peer to fetch
+ * @return the interface to this bgp peer
+ */
+ BgpPeer getPeer(BgpId bgpId);
+
+ /**
+ * Register a listener for BGP message events.
+ *
+ * @param listener the listener to notify
+ */
+ void addListener(BgpNodeListener listener);
+
+ /**
+ * Unregister a listener.
+ *
+ * @param listener the listener to unregister
+ */
+ void removeListener(BgpNodeListener listener);
+
+ /**
+ * Register a listener for BGP message events.
+ *
+ * @param listener the listener to notify
+ */
+ void addLinkListener(BgpLinkListener listener);
+
+ /**
+ * Unregister a listener.
+ *
+ * @param listener the listener to unregister
+ */
+ void removeLinkListener(BgpLinkListener listener);
+
+ /**
+ * Send a message to a particular bgp peer.
+ *
+ * @param bgpId the id of the peer to send message.
+ * @param msg the message to send
+ */
+ void writeMsg(BgpId bgpId, BgpMessage msg);
+
+ /**
+ * Process a message and notify the appropriate listeners.
+ *
+ * @param bgpId id of the peer the message arrived on
+ * @param msg the message to process.
+ * @throws BgpParseException on data processing error
+ */
+ void processBGPPacket(BgpId bgpId, BgpMessage msg) throws BgpParseException;
+
+ /**
+ * Close all connected BGP peers.
+ *
+ */
+ void closeConnectedPeers();
+
+ /**
+ * Get the BGPConfig class to the caller.
+ *
+ * @return configuration object
+ */
+ BgpCfg getConfig();
+
+ /**
+ * Get the BGP connected peers to this controller.
+ *
+ * @return the integer number
+ */
+ int connectedPeerCount();
+
+ /**
+ * Return BGP peer manager.
+ *
+ * @return BGPPeerManager peer manager instance
+ */
+ BgpPeerManager peerManager();
+
+ /**
+ * Return BGP connected peers.
+ *
+ * @return connectedPeers connected peers
+ */
+ Map<BgpId, BgpPeer> connectedPeers();
+
+ /**
+ * Return BGP node listener.
+ *
+ * @return node listener
+ */
+ Set<BgpNodeListener> listener();
+
+ /**
+ * Return BGP link listener.
+ *
+ * @return link listener
+ */
+ Set<BgpLinkListener> linkListener();
+}