BUG-726: Move pcep topology tunnel to aggregator
[bgpcep.git] / pcep / tunnel / tunnel-provider / src / test / java / org / opendaylight / bgpcep / pcep / tunnel / provider / TunnelProgrammingTest.java
diff --git a/pcep/tunnel/tunnel-provider/src/test/java/org/opendaylight/bgpcep/pcep/tunnel/provider/TunnelProgrammingTest.java b/pcep/tunnel/tunnel-provider/src/test/java/org/opendaylight/bgpcep/pcep/tunnel/provider/TunnelProgrammingTest.java
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+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. 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.bgpcep.pcep.tunnel.provider;
+
+import com.google.common.collect.Lists;
+import com.google.common.util.concurrent.ListenableFuture;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Executor;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+import org.opendaylight.bgpcep.programming.spi.Instruction;
+import org.opendaylight.bgpcep.programming.spi.InstructionScheduler;
+import org.opendaylight.bgpcep.programming.spi.SchedulerException;
+import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
+import org.opendaylight.controller.md.sal.binding.test.AbstractConcurrentDataBrokerTest;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.Bandwidth;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.topology.rev140113.NetworkTopologyRef;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.AdministrativeStatus;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.PcepCreateP2pTunnelInput1;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.PcepCreateP2pTunnelInput1Builder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.PcepUpdateTunnelInput1;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.PcepUpdateTunnelInput1Builder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ClassType;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.Ipv4Case;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.ipv4._case.Ipv4;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.InstructionStatus;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.SubmitInstructionInput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.IpPrefixCase;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.IpPrefixCaseBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.ip.prefix._case.IpPrefixBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.AddLspInput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.AddLspOutput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.NetworkTopologyPcepService;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.RemoveLspInput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.RemoveLspOutput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.UpdateLspInput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.UpdateLspOutput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.add.lsp.args.Arguments;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.p2p.rev130819.tunnel.p2p.path.cfg.attributes.ExplicitHops;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.p2p.rev130819.tunnel.p2p.path.cfg.attributes.ExplicitHopsBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepCreateP2pTunnelInputBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepDestroyTunnelInputBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepUpdateTunnelInputBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.ExplicitHops1;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.ExplicitHops1Builder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.Link1;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.Link1Builder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.SupportingNode1;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.SupportingNode1Builder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.tunnel.pcep.supporting.node.attributes.PathComputationClientBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.programming.rev130930.create.p2p.tunnel.input.DestinationBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.programming.rev130930.create.p2p.tunnel.input.SourceBuilder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.LinkId;
+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.NodeId;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TpId;
+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.TopologyBuilder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Link;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.LinkBuilder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.LinkKey;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPointBuilder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPointKey;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNode;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNodeBuilder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNodeKey;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.TerminationPoint1;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.TerminationPoint1Builder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.IgpTerminationPointAttributesBuilder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.igp.termination.point.attributes.termination.point.type.IpBuilder;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.common.RpcResult;
+
+public class TunnelProgrammingTest extends AbstractConcurrentDataBrokerTest {
+
+    private static final TopologyId TOPOLOGY_ID = new TopologyId("tunnel-topo");
+    private static final InstanceIdentifier<Topology> TOPO_IID = InstanceIdentifier.builder(NetworkTopology.class).child(Topology.class, new TopologyKey(TOPOLOGY_ID)).build();
+
+    private static final String NODE1_IPV4 = "127.0.0.1";
+    private static final NodeId NODE1_ID = new NodeId("pcc://" + NODE1_IPV4);
+    private static final TpId TP1_ID = new TpId(NODE1_IPV4);
+
+    private static final String NODE2_IPV4 = "127.0.0.10";
+    private static final NodeId NODE2_ID = new NodeId("pcc://" + NODE2_IPV4);
+    private static final TpId TP2_ID = new TpId(NODE2_IPV4);
+
+    private static final LinkId LINK1_ID = new LinkId("link1");
+
+    private static final String IPV4_PREFIX1 = "195.20.160.40/32";
+    private static final String IPV4_PREFIX2 = "201.20.160.43/32";
+
+    @Mock
+    private NetworkTopologyPcepService topologyService;
+    @Mock
+    private InstructionScheduler scheduler;
+    @Mock
+    private ListenableFuture<Instruction> instructionFuture;
+    @Mock
+    private Instruction instruction;
+
+    private TunnelProgramming tunnelProgramming;
+
+    private AddLspInput addLspInput;
+    private UpdateLspInput updateLspInput;
+    private RemoveLspInput removeLspInput;
+
+    @Mock
+    private ListenableFuture<RpcResult<AddLspOutput>> futureAddLspOutput;
+    @Mock
+    private ListenableFuture<RpcResult<UpdateLspOutput>> futureUpdateLspOutput;
+    @Mock
+    private ListenableFuture<RpcResult<RemoveLspOutput>> futureRemoveLspOutput;
+
+    @Before
+    public void setUp() throws SchedulerException, InterruptedException, ExecutionException, TransactionCommitFailedException {
+        MockitoAnnotations.initMocks(this);
+        Mockito.doReturn(true).when(this.instruction).checkedExecutionStart();
+        Mockito.doNothing().when(this.instruction).executionCompleted(InstructionStatus.Failed, null);
+        Mockito.doAnswer(invocation -> {
+            final Runnable callback = (Runnable) invocation.getArguments()[0];
+            callback.run();
+            return null;
+        }).when(this.instructionFuture).addListener(Mockito.any(Runnable.class), Mockito.any(Executor.class));
+        Mockito.doAnswer(invocation -> {
+            final Runnable callback = (Runnable) invocation.getArguments()[0];
+            callback.run();
+            return null;
+        }).when(this.futureAddLspOutput).addListener(Mockito.any(Runnable.class), Mockito.any(Executor.class));
+        Mockito.doAnswer(invocation -> {
+            final Runnable callback = (Runnable) invocation.getArguments()[0];
+            callback.run();
+            return null;
+        }).when(this.futureUpdateLspOutput).addListener(Mockito.any(Runnable.class), Mockito.any(Executor.class));
+        Mockito.doAnswer(invocation -> {
+            final Runnable callback = (Runnable) invocation.getArguments()[0];
+            callback.run();
+            return null;
+        }).when(this.futureRemoveLspOutput).addListener(Mockito.any(Runnable.class), Mockito.any(Executor.class));
+        Mockito.doAnswer(invocation -> {
+            TunnelProgrammingTest.this.addLspInput = (AddLspInput) invocation.getArguments()[0];
+            return TunnelProgrammingTest.this.futureAddLspOutput;
+        }).when(this.topologyService).addLsp(Mockito.any(AddLspInput.class));
+        Mockito.doAnswer(invocation -> {
+            TunnelProgrammingTest.this.updateLspInput = (UpdateLspInput) invocation.getArguments()[0];
+            return TunnelProgrammingTest.this.futureUpdateLspOutput;
+        }).when(this.topologyService).updateLsp(Mockito.any(UpdateLspInput.class));
+        Mockito.doAnswer(invocation -> {
+            TunnelProgrammingTest.this.removeLspInput = (RemoveLspInput) invocation.getArguments()[0];
+            return TunnelProgrammingTest.this.futureRemoveLspOutput;
+        }).when(this.topologyService).removeLsp(Mockito.any(RemoveLspInput.class));
+        Mockito.doReturn(this.instruction).when(this.instructionFuture).get();
+        Mockito.doReturn(true).when(this.instructionFuture).isDone();
+        Mockito.doReturn(this.instructionFuture).when(this.scheduler).scheduleInstruction(Mockito.any(SubmitInstructionInput.class));
+
+        createInitialTopology();
+        this.tunnelProgramming = new TunnelProgramming(this.scheduler, getDataBroker(), this.topologyService);
+    }
+
+    @Test
+    public void testTunnelProgramming() throws TransactionCommitFailedException {
+        final Bandwidth bwd = new Bandwidth(new byte[] {0x00, 0x00, 0x00, (byte) 0xff});
+        final ClassType classType = new ClassType((short) 1);
+        final String tunnelName = "create-tunnel";
+        final NetworkTopologyRef topologyRef = new NetworkTopologyRef(TOPO_IID);
+        // create tunnel
+        final PcepCreateP2pTunnelInputBuilder createInputBuilder = new PcepCreateP2pTunnelInputBuilder();
+        createInputBuilder.setDestination(new DestinationBuilder().setNode(NODE2_ID).setTp(TP2_ID).build());
+        createInputBuilder.setSource(new SourceBuilder().setNode(NODE1_ID).setTp(TP1_ID).build());
+        createInputBuilder.setNetworkTopologyRef(topologyRef);
+        createInputBuilder.setBandwidth(bwd);
+        createInputBuilder.setClassType(classType);
+        createInputBuilder.setSymbolicPathName(tunnelName);
+        createInputBuilder.setExplicitHops(Lists.newArrayList());
+        createInputBuilder.addAugmentation(PcepCreateP2pTunnelInput1.class, new PcepCreateP2pTunnelInput1Builder().setAdministrativeStatus(AdministrativeStatus.Active).build());
+        this.tunnelProgramming.pcepCreateP2pTunnel(createInputBuilder.build());
+        //check add-lsp input
+        Assert.assertNotNull(this.addLspInput);
+        Assert.assertEquals(tunnelName, this.addLspInput.getName());
+        final Arguments agrs = this.addLspInput.getArguments();
+        Assert.assertNotNull(agrs);
+        Assert.assertEquals(bwd, agrs.getBandwidth().getBandwidth());
+        Assert.assertEquals(classType, agrs.getClassType().getClassType());
+        final Ipv4 ipv4Endpoints = ((Ipv4Case) agrs.getEndpointsObj().getAddressFamily()).getIpv4();
+        Assert.assertEquals(NODE1_IPV4, ipv4Endpoints.getSourceIpv4Address().getValue());
+        Assert.assertEquals(NODE2_IPV4, ipv4Endpoints.getDestinationIpv4Address().getValue());
+        Assert.assertEquals(NODE1_ID.getValue(), this.addLspInput.getNode().getValue());
+        createLink();
+
+        // update tunnel
+        final PcepUpdateTunnelInputBuilder updateInputBuilder = new PcepUpdateTunnelInputBuilder();
+        updateInputBuilder.setNetworkTopologyRef(topologyRef);
+        updateInputBuilder.setBandwidth(bwd);
+        updateInputBuilder.setClassType(classType);
+        updateInputBuilder.setExplicitHops(Lists.newArrayList(createExplicitHop(IPV4_PREFIX1), createExplicitHop(IPV4_PREFIX2)));
+        updateInputBuilder.setLinkId(LINK1_ID);
+        updateInputBuilder.addAugmentation(PcepUpdateTunnelInput1.class, new PcepUpdateTunnelInput1Builder().setAdministrativeStatus(AdministrativeStatus.Active).build());
+        this.tunnelProgramming.pcepUpdateTunnel(updateInputBuilder.build());
+        //check update-lsp input
+        Assert.assertNotNull(this.updateLspInput);
+        Assert.assertEquals(LINK1_ID.getValue(), this.updateLspInput.getName());
+        final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.update.lsp.args.Arguments updArgs = this.updateLspInput.getArguments();
+        Assert.assertEquals(2, updArgs.getEro().getSubobject().size());
+        final List<Subobject> subObjects = updArgs.getEro().getSubobject();
+        final IpPrefixCase prefix1 = (IpPrefixCase)subObjects.get(0).getSubobjectType();
+        final IpPrefixCase prefix2 = (IpPrefixCase)subObjects.get(1).getSubobjectType();
+        Assert.assertEquals(IPV4_PREFIX1, prefix1.getIpPrefix().getIpPrefix().getIpv4Prefix().getValue());
+        Assert.assertEquals(IPV4_PREFIX2, prefix2.getIpPrefix().getIpPrefix().getIpv4Prefix().getValue());
+
+        // delete tunnel
+        final PcepDestroyTunnelInputBuilder destroyInputBuilder = new PcepDestroyTunnelInputBuilder();
+        destroyInputBuilder.setLinkId(LINK1_ID);
+        destroyInputBuilder.setNetworkTopologyRef(topologyRef);
+        this.tunnelProgramming.pcepDestroyTunnel(destroyInputBuilder.build());
+        Assert.assertNotNull(this.removeLspInput);
+        Assert.assertEquals(LINK1_ID.getValue(), this.removeLspInput.getName());
+        Assert.assertEquals(NODE1_ID.getValue(), this.removeLspInput.getNode().getValue());
+    }
+
+    private void createInitialTopology() throws TransactionCommitFailedException {
+        final TopologyBuilder topologyBuilder = new TopologyBuilder();
+        topologyBuilder.setKey(new TopologyKey(TOPOLOGY_ID));
+        topologyBuilder.setServerProvided(true);
+        topologyBuilder.setTopologyId(TOPOLOGY_ID);
+        topologyBuilder.setNode(Lists.newArrayList(createNode(NODE1_ID, TP1_ID, NODE1_IPV4), createNode(NODE2_ID, TP2_ID, NODE2_IPV4)));
+        final WriteTransaction wTx = getDataBroker().newWriteOnlyTransaction();
+        wTx.put(LogicalDatastoreType.OPERATIONAL, TOPO_IID, topologyBuilder.build(), true);
+        wTx.submit().checkedGet();
+    }
+
+    private static Node createNode(final NodeId nodeId, final TpId tpId, final String ipv4Address) {
+        final TerminationPointBuilder tpBuilder = new TerminationPointBuilder();
+        tpBuilder.setTpId(tpId);
+        tpBuilder.setKey(new TerminationPointKey(tpId));
+        tpBuilder.addAugmentation(TerminationPoint1.class, new TerminationPoint1Builder().setIgpTerminationPointAttributes(new IgpTerminationPointAttributesBuilder().setTerminationPointType(new IpBuilder().setIpAddress(Lists.newArrayList(new IpAddress(new Ipv4Address(ipv4Address)))).build()).build()).build());
+        final NodeBuilder nodeBuilder = new NodeBuilder();
+        nodeBuilder.setNodeId(nodeId);
+        nodeBuilder.setKey(new NodeKey(nodeId));
+        nodeBuilder.setTerminationPoint(Lists.newArrayList(tpBuilder.build()));
+        final SupportingNode supportingNode = new SupportingNodeBuilder().setKey(new SupportingNodeKey(nodeId, new TopologyId("dummy"))).addAugmentation(SupportingNode1.class, new SupportingNode1Builder().setPathComputationClient(new PathComputationClientBuilder().setControlling(true).build()).build()).build();
+        nodeBuilder.setSupportingNode(Lists.newArrayList(supportingNode));
+        return nodeBuilder.build();
+    }
+
+    private static ExplicitHops createExplicitHop(final String ipv4Prefix) {
+        final ExplicitHopsBuilder explcitHopsBuilder = new ExplicitHopsBuilder();
+        explcitHopsBuilder.addAugmentation(ExplicitHops1.class, new ExplicitHops1Builder().setSubobjectType(new IpPrefixCaseBuilder().setIpPrefix(new IpPrefixBuilder().setIpPrefix(new IpPrefix(new Ipv4Prefix(ipv4Prefix))).build()).build()).build());
+        return explcitHopsBuilder.build();
+    }
+
+    private void createLink() throws TransactionCommitFailedException {
+        final LinkBuilder linkBuilder = new LinkBuilder();
+        linkBuilder.setSource(new org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.link.attributes.SourceBuilder().setSourceNode(NODE1_ID).setSourceTp(TP1_ID).build());
+        linkBuilder.setDestination(new org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.link.attributes.DestinationBuilder().setDestNode(NODE2_ID).setDestTp(TP2_ID).build());
+        linkBuilder.setLinkId(LINK1_ID);
+        linkBuilder.setKey(new LinkKey(LINK1_ID));
+        linkBuilder.addAugmentation(Link1.class, new Link1Builder().setSymbolicPathName(LINK1_ID.getValue()).build());
+        final WriteTransaction wTx = getDataBroker().newWriteOnlyTransaction();
+        wTx.put(LogicalDatastoreType.OPERATIONAL, TOPO_IID.builder().child(Link.class, new LinkKey(LINK1_ID)).build(), linkBuilder.build(), true);
+        wTx.submit().checkedGet();
+    }
+
+}