Updated L2Gw changes in "neutronvpn", "elanmanager" and "dhcpservice" modules

[vpnservice.git] / elanmanager / elanmanager-impl / src / main / java / org / opendaylight / vpnservice / elan / l2gw / listeners / HwvtepPhysicalLocatorListener.java

diff --git a/elanmanager/elanmanager-impl/src/main/java/org/opendaylight/vpnservice/elan/l2gw/listeners/HwvtepPhysicalLocatorListener.java b/elanmanager/elanmanager-impl/src/main/java/org/opendaylight/vpnservice/elan/l2gw/listeners/HwvtepPhysicalLocatorListener.java
new file mode 100644 (file)
index 0000000..04f6304
--- /dev/null
+++ b/elanmanager/elanmanager-impl/src/main/java/org/opendaylight/vpnservice/elan/l2gw/listeners/HwvtepPhysicalLocatorListener.java
@@ -0,0 +1,141 @@
+/*
+ * 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.elan.l2gw.listeners;
+
+import com.google.common.collect.Lists;
+import org.opendaylight.controller.md.sal.binding.api.ClusteredDataChangeListener;
+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.datastoreutils.AsyncClusteredDataChangeListenerBase;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPoint;
+
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+
+/**
+ * Listener for physical locator presence in operational datastore
+ *
+ *
+ *
+ */
+public class HwvtepPhysicalLocatorListener extends
+        AsyncClusteredDataChangeListenerBase<TerminationPoint, HwvtepPhysicalLocatorListener> implements AutoCloseable {
+
+    private DataBroker broker;
+    private ListenerRegistration<DataChangeListener> lstnerRegistration;
+
+    private static final Logger logger = LoggerFactory.getLogger(HwvtepPhysicalLocatorListener.class);
+
+    public HwvtepPhysicalLocatorListener(DataBroker broker) {
+        super(TerminationPoint.class, HwvtepPhysicalLocatorListener.class);
+
+        this.broker = broker;
+        registerListener();
+        logger.debug("created HwvtepPhysicalLocatorListener");
+    }
+
+    static Map<InstanceIdentifier<TerminationPoint>, List<Runnable>> waitingJobsList = new ConcurrentHashMap<>();
+    static Map<InstanceIdentifier<TerminationPoint>, Boolean> teps = new ConcurrentHashMap<>();
+
+    public static void runJobAfterPhysicalLocatorIsAvialable(InstanceIdentifier<TerminationPoint> key, Runnable runnable) {
+        if (teps.get(key) != null) {
+            logger.debug("physical locator already available {} running job ", key);
+            runnable.run();
+            return;
+        }
+        synchronized (HwvtepPhysicalLocatorListener.class) {
+            List<Runnable> list = waitingJobsList.get(key);
+            if (list == null) {
+                waitingJobsList.put(key, Lists.newArrayList(runnable));
+            } else {
+                list.add(runnable);
+            }
+            logger.debug("added the job to wait list of physical locator {}", key);
+        }
+    }
+
+    protected void registerListener() {
+        try {
+            lstnerRegistration = this.broker.registerDataChangeListener(LogicalDatastoreType.OPERATIONAL,
+                    InstanceIdentifier.create(NetworkTopology.class).child(Topology.class).child(Node.class).
+                            child(TerminationPoint.class), this, DataChangeScope.BASE);
+        } catch (final Exception e) {
+            logger.error("Hwvtep LocalUcasMacs DataChange listener registration failed !", e);
+            throw new IllegalStateException("Hwvtep LocalUcasMacs DataChange listener registration failed .", e);
+        }
+    }
+
+    @Override
+    public void close() throws Exception {
+        if (lstnerRegistration != null) {
+            try {
+                lstnerRegistration.close();
+            } catch (final Exception e) {
+                logger.error("Error when cleaning up DataChangeListener.", e);
+            }
+            lstnerRegistration = null;
+        }
+    }
+
+    @Override
+    protected void remove(InstanceIdentifier<TerminationPoint> identifier, TerminationPoint del) {
+        logger.trace("physical locator removed {}", identifier);
+        teps.remove(identifier);
+    }
+
+    @Override
+    protected void update(InstanceIdentifier<TerminationPoint> identifier, TerminationPoint original, TerminationPoint update) {
+        logger.trace("physical locator available {}", identifier);
+    }
+
+    @Override
+    protected void add(InstanceIdentifier<TerminationPoint> identifier, TerminationPoint add) {
+        logger.trace("physical locator available {}", identifier);
+        teps.put(identifier, true);
+        List<Runnable> runnableList = null;
+        synchronized (HwvtepPhysicalLocatorListener.class) {
+            runnableList = waitingJobsList.get(identifier);
+            waitingJobsList.remove(identifier);
+        }
+        if (runnableList != null) {
+            logger.debug("physical locator available {} running jobs ", identifier);
+            for (Runnable r : runnableList) {
+                r.run();
+            }
+        } else {
+            logger.debug("no jobs are waiting for physical locator {}", identifier);
+        }
+    }
+
+    @Override
+    protected InstanceIdentifier<TerminationPoint> getWildCardPath() {
+        return InstanceIdentifier.create(NetworkTopology.class).child(Topology.class).child(Node.class).
+                child(TerminationPoint.class);
+    }
+
+    @Override
+    protected ClusteredDataChangeListener getDataChangeListener() {
+        return HwvtepPhysicalLocatorListener.this;
+    }
+
+    @Override
+    protected DataChangeScope getDataChangeScope() {
+        return DataChangeScope.BASE;
+    }
+}