Merge "DHCP Handling for TOR VM"

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

diff --git a/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/DhcpInterfaceConfigListener.java b/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/DhcpInterfaceConfigListener.java
new file mode 100644 (file)
index 0000000..1bb1dd7
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+++ b/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/DhcpInterfaceConfigListener.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2016 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.DataChangeScope;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.vpnservice.mdsalutil.AbstractDataChangeListener;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.interfacemgr.rev150331.IfTunnel;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.interfacemgr.rev150331.ParentRefs;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class DhcpInterfaceConfigListener extends AbstractDataChangeListener<Interface> implements AutoCloseable {
+
+    private static final Logger logger = LoggerFactory.getLogger(DhcpInterfaceConfigListener.class);
+    private ListenerRegistration<DataChangeListener> listenerRegistration;
+    private DataBroker dataBroker;
+    private DhcpExternalTunnelManager dhcpExternalTunnelManager;
+
+    public DhcpInterfaceConfigListener(DataBroker dataBroker, DhcpExternalTunnelManager dhcpExternalTunnelManager) {
+        super(Interface.class);
+        this.dataBroker = dataBroker;
+        this.dhcpExternalTunnelManager = dhcpExternalTunnelManager;
+        registerListener();
+    }
+
+    private void registerListener() {
+        try {
+            listenerRegistration = dataBroker.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,
+                    getWildCardPath(), DhcpInterfaceConfigListener.this, DataChangeScope.SUBTREE);
+        } catch (final Exception e) {
+            logger.error("DhcpInterfaceEventListener DataChange listener registration fail!", e);
+            throw new IllegalStateException("DhcpInterfaceEventListener registration Listener failed.", e);
+        }
+    }
+
+    private InstanceIdentifier<Interface> getWildCardPath() {
+        return InstanceIdentifier.create(Interfaces.class).child(Interface.class);
+    }
+
+    @Override
+    public void close() throws Exception {
+        if (listenerRegistration != null) {
+            try {
+                listenerRegistration.close();
+            } catch (final Exception e) {
+                logger.error("Error when cleaning up DataChangeListener.", e);
+            }
+            listenerRegistration = null;
+        }
+        logger.info("DhcpInterfaceConfigListener Closed");
+    }
+    @Override
+    protected void remove(InstanceIdentifier<Interface> identifier, Interface del) {
+        IfTunnel tunnelInterface = del.getAugmentation(IfTunnel.class);
+        if (tunnelInterface != null && !tunnelInterface.isInternal()) {
+            IpAddress tunnelIp = tunnelInterface.getTunnelDestination();
+            ParentRefs interfce = del.getAugmentation(ParentRefs.class);
+            if (interfce != null) {
+                dhcpExternalTunnelManager.handleTunnelStateDown(tunnelIp, interfce.getDatapathNodeIdentifier());
+            }
+        }
+    }
+
+    @Override
+    protected void update(InstanceIdentifier<Interface> identifier, Interface original, Interface update) {
+        // Handled in update () DhcpInterfaceEventListener
+    }
+
+    @Override
+    protected void add(InstanceIdentifier<Interface> identifier, Interface add) {
+        // Handled in add() DhcpInterfaceEventListener
+    }
+}
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