hwvtepsouthbound/hwvtepsouthbound-impl/src/main/java/org/opendaylight/ovsdb/hwvtepsouthbound/HwvtepSouthboundUtil.java

   1 /*
   2  * Copyright (c) 2015 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.ovsdb.hwvtepsouthbound;
  10
  11 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  12 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  13 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  14 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  15 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  16 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepGlobalAugmentation;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepGlobalRef;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepLogicalSwitchAttributes;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepPhysicalSwitchAttributes;
  21 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.data.impl.codec.DeserializationException;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 import com.google.common.base.Optional;
  28 import com.google.common.base.Preconditions;
  29 import com.google.common.util.concurrent.CheckedFuture;
  30
  31 public class HwvtepSouthboundUtil {
  32
  33     private static final Logger LOG = LoggerFactory.getLogger(HwvtepSouthboundUtil.class);
  34
  35     private static InstanceIdentifierCodec instanceIdentifierCodec;
  36
  37     private HwvtepSouthboundUtil() {
  38         // Prevent instantiating a utility class
  39     }
  40
  41     public static void setInstanceIdentifierCodec(InstanceIdentifierCodec iidc) {
  42         instanceIdentifierCodec = iidc;
  43     }
  44
  45     public static InstanceIdentifierCodec getInstanceIdentifierCodec() {
  46         return instanceIdentifierCodec;
  47     }
  48
  49     public static String serializeInstanceIdentifier(InstanceIdentifier<?> iid) {
  50         return instanceIdentifierCodec.serialize(iid);
  51     }
  52
  53     public static InstanceIdentifier<?> deserializeInstanceIdentifier(String iidString) {
  54         InstanceIdentifier<?> result = null;
  55         try {
  56             result = instanceIdentifierCodec.bindingDeserializer(iidString);
  57         } catch (DeserializationException e) {
  58             LOG.warn("Unable to deserialize iidString", e);
  59         }
  60         return result;
  61     }
  62
  63     public static <D extends org.opendaylight.yangtools.yang.binding.DataObject> Optional<D> readNode(
  64                     ReadWriteTransaction transaction, final InstanceIdentifier<D> connectionIid) {
  65         Optional<D> node = Optional.absent();
  66         try {
  67             node = transaction.read(LogicalDatastoreType.OPERATIONAL, connectionIid).checkedGet();
  68         } catch (final ReadFailedException e) {
  69             LOG.warn("Read Operational/DS for Node failed! {}", connectionIid, e);
  70         }
  71         return node;
  72     }
  73
  74     public static <D extends org.opendaylight.yangtools.yang.binding.DataObject> boolean deleteNode(
  75                     ReadWriteTransaction transaction, final InstanceIdentifier<D> connectionIid) {
  76         boolean result = false;
  77         transaction.delete(LogicalDatastoreType.OPERATIONAL, connectionIid);
  78         CheckedFuture<Void, TransactionCommitFailedException> future = transaction.submit();
  79         try {
  80             future.checkedGet();
  81             result = true;
  82         } catch (TransactionCommitFailedException e) {
  83             LOG.warn("Failed to delete {} ", connectionIid, e);
  84         }
  85         return result;
  86     }
  87
  88     public static Optional<HwvtepGlobalAugmentation> getManagingNode(DataBroker db,
  89                     HwvtepPhysicalSwitchAttributes pNode) {
  90         Preconditions.checkNotNull(pNode);
  91         Optional<HwvtepGlobalAugmentation> result = null;
  92         HwvtepGlobalRef ref = pNode.getManagedBy();
  93         if (ref != null && ref.getValue() != null) {
  94             result = getManagingNode(db, ref);
  95         } else {
  96             LOG.warn("Cannot find client for PhysicalSwitch without a specified ManagedBy {}", pNode);
  97             return Optional.absent();
  98         }
  99         if (!result.isPresent()) {
 100             LOG.warn("Failed to find managing node for PhysicalSwitch {}", pNode);
 101         }
 102         return result;
 103     }
 104
 105     public static Optional<HwvtepGlobalAugmentation> getManagingNode(DataBroker db, HwvtepGlobalRef ref) {
 106         try {
 107             ReadOnlyTransaction transaction = db.newReadOnlyTransaction();
 108             @SuppressWarnings("unchecked")
 109             // Note: erasure makes this safe in combination with the typecheck
 110             // below
 111             InstanceIdentifier<Node> path = (InstanceIdentifier<Node>) ref.getValue();
 112
 113             CheckedFuture<Optional<Node>, ReadFailedException> nf =
 114                             transaction.read(LogicalDatastoreType.OPERATIONAL, path);
 115             transaction.close();
 116             Optional<Node> optional = nf.get();
 117             if (optional != null && optional.isPresent()) {
 118                 HwvtepGlobalAugmentation hwvtepNode = null;
 119                 Node node = optional.get();
 120                 if (node instanceof HwvtepGlobalAugmentation) {
 121                     hwvtepNode = (HwvtepGlobalAugmentation) node;
 122                 } else if (node != null) {
 123                     hwvtepNode = node.getAugmentation(HwvtepGlobalAugmentation.class);
 124                 }
 125                 if (hwvtepNode != null) {
 126                     return Optional.of(hwvtepNode);
 127                 } else {
 128                     LOG.warn("Hwvtep switch claims to be managed by {} but " + "that HwvtepNode does not exist",
 129                                     ref.getValue());
 130                     return Optional.absent();
 131                 }
 132             } else {
 133                 LOG.warn("Mysteriously got back a thing which is *not* a topology Node: {}", optional);
 134                 return Optional.absent();
 135             }
 136         } catch (Exception e) {
 137             LOG.warn("Failed to get HwvtepNode {}", ref, e);
 138             return Optional.absent();
 139         }
 140     }
 141
 142 }