Add pkt handling to DHCPService

[vpnservice.git] / dhcpservice / dhcpservice-impl / src / main / java / org / opendaylight / vpnservice / dhcpservice / NodeListener.java

diff --git a/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/NodeListener.java b/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/NodeListener.java
new file mode 100644 (file)
index 0000000..8cb8a7a
--- /dev/null
+++ b/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/NodeListener.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2015 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.vpnservice.dhcpservice;
+
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.vpnservice.dhcpservice.api.DHCPMConstants;
+import org.opendaylight.vpnservice.mdsalutil.*;
+import org.opendaylight.vpnservice.mdsalutil.interfaces.IMdsalApiManager;
+import org.opendaylight.vpnservice.mdsalutil.packet.IPProtocols;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.List;
+
+public class NodeListener extends AbstractDataChangeListener<Node> implements AutoCloseable {
+
+    private static final Logger LOG = LoggerFactory.getLogger(NodeListener.class);
+
+    private IMdsalApiManager mdsalManager;
+    private ListenerRegistration<DataChangeListener> listenerRegistration;
+    private final DataBroker broker;
+    private DhcpManager dhcpManager;
+
+    public NodeListener(final DataBroker db, final DhcpManager dhcpMgr) {
+        super(Node.class);
+        broker = db;
+        dhcpManager = dhcpMgr;
+        registerListener(db);
+    }
+
+    private void registerListener(final DataBroker db) {
+        try {
+            listenerRegistration = db.registerDataChangeListener(LogicalDatastoreType.OPERATIONAL,
+                    getWildCardPath(), NodeListener.this, AsyncDataBroker.DataChangeScope.SUBTREE);
+        } catch (final Exception e) {
+            LOG.error("NodeListener: DataChange listener registration fail!", e);
+            throw new IllegalStateException("NodeListener: registration Listener failed.", e);
+        }
+    }
+
+    private InstanceIdentifier<Node> getWildCardPath() {
+        return InstanceIdentifier.create(Nodes.class).child(Node.class);
+    }
+
+
+    @Override
+    protected void remove(InstanceIdentifier<Node> identifier, Node del) {
+
+    }
+
+    @Override
+    protected void update(InstanceIdentifier<Node> identifier, Node original, Node update) {
+
+    }
+
+    @Override
+    protected void add(InstanceIdentifier<Node> identifier, Node add) {
+        NodeId nodeId = add.getId();
+        String[] node =  nodeId.getValue().split(":");
+        BigInteger dpId = new BigInteger(node[1]);
+        dhcpManager.installDhcpEntries(dpId);
+    }
+
+    @Override
+    public void close() throws Exception {
+        if (listenerRegistration != null) {
+            try {
+                listenerRegistration.close();
+            } catch (final Exception e) {
+                LOG.error("Error when cleaning up NodeListener.", e);
+            }
+            listenerRegistration = null;
+            //ToDo: Should we delete DHCP flows when we are closed?
+        }
+        LOG.debug("Node Listener Closed");
+    }
+}