pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/message/PCEPUpdateRequestMessageParser.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. 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 package org.opendaylight.protocol.pcep.impl.message;
   9
  10 import io.netty.buffer.ByteBuf;
  11
  12 import java.util.List;
  13
  14 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  15 import org.opendaylight.protocol.pcep.PCEPDocumentedException;
  16 import org.opendaylight.protocol.pcep.PCEPErrors;
  17 import org.opendaylight.protocol.pcep.UnknownObject;
  18 import org.opendaylight.protocol.pcep.spi.ObjectHandlerRegistry;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.Pcupd;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.PcupdBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.bandwidth.object.Bandwidth;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Ero;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.include.route.object.Iro;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.Metrics;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.MetricsBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.object.Lsp;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.Lspa;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.metric.object.Metric;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcupd.message.PcupdMessageBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcupd.message.pcupd.message.Updates;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcupd.message.pcupd.message.UpdatesBuilder;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcupd.message.pcupd.message.updates.Path;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcupd.message.pcupd.message.updates.PathBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.srp.object.Srp;
  37
  38 import com.google.common.collect.Lists;
  39
  40 /**
  41  * Parser for {@link Pcupd}
  42  */
  43 public class PCEPUpdateRequestMessageParser extends AbstractMessageParser {
  44
  45         public static final int TYPE = 11;
  46
  47         public PCEPUpdateRequestMessageParser(final ObjectHandlerRegistry registry) {
  48                 super(registry);
  49         }
  50
  51         @Override
  52         public void serializeMessage(final Message message, final ByteBuf buffer) {
  53                 if (!(message instanceof Pcupd)) {
  54                         throw new IllegalArgumentException("Wrong instance of PCEPMessage. Passed instance of " + message.getClass()
  55                                         + ". Nedded PcupdMessage.");
  56                 }
  57                 final Pcupd msg = (Pcupd) message;
  58                 final List<Updates> updates = msg.getPcupdMessage().getUpdates();
  59                 for (final Updates update : updates) {
  60                         buffer.writeBytes(serializeObject(update.getSrp()));
  61                         buffer.writeBytes(serializeObject(update.getLsp()));
  62                         final Path p = update.getPath();
  63                         if (p != null) {
  64                                 buffer.writeBytes(serializeObject(p.getEro()));
  65                                 if (p.getLspa() != null) {
  66                                         buffer.writeBytes(serializeObject(p.getLspa()));
  67                                 }
  68                                 if (p.getBandwidth() != null) {
  69                                         buffer.writeBytes(serializeObject(p.getBandwidth()));
  70                                 }
  71                                 if (p.getMetrics() != null && !p.getMetrics().isEmpty()) {
  72                                         for (final Metrics m : p.getMetrics()) {
  73                                                 buffer.writeBytes(serializeObject(m.getMetric()));
  74                                         }
  75                                 }
  76                                 if (p.getIro() != null) {
  77                                         buffer.writeBytes(serializeObject(p.getIro()));
  78                                 }
  79                         }
  80                 }
  81         }
  82
  83         @Override
  84         protected Message validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException, PCEPDocumentedException {
  85                 if (objects == null) {
  86                         throw new IllegalArgumentException("Passed list can't be null.");
  87                 }
  88                 if (objects.isEmpty()) {
  89                         throw new PCEPDeserializerException("Pcup message cannot be empty.");
  90                 }
  91
  92                 final List<Updates> updateRequests = Lists.newArrayList();
  93
  94                 while (!objects.isEmpty()) {
  95                         final Updates update = getValidUpdates(objects);
  96                         if (update != null) {
  97                                 updateRequests.add(update);
  98                         }
  99                 }
 100                 if (!objects.isEmpty()) {
 101                         if (objects.get(0) instanceof UnknownObject) {
 102                                 throw new PCEPDocumentedException("Unknown object encountered", ((UnknownObject) objects.get(0)).getError());
 103                         }
 104                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
 105                 }
 106                 return new PcupdBuilder().setPcupdMessage(new PcupdMessageBuilder().setUpdates(updateRequests).build()).build();
 107         }
 108
 109         private Updates getValidUpdates(final List<Object> objects) throws PCEPDocumentedException {
 110                 final UpdatesBuilder builder = new UpdatesBuilder();
 111                 if (objects.get(0) instanceof Srp) {
 112                         builder.setSrp((Srp) objects.get(0));
 113                         objects.remove(0);
 114                 } else {
 115                         throw new PCEPDocumentedException("Srp object missing.", PCEPErrors.SRP_MISSING);
 116                 }
 117                 if (objects.get(0) instanceof Lsp) {
 118                         builder.setLsp((Lsp) objects.get(0));
 119                         objects.remove(0);
 120                 } else {
 121                         throw new PCEPDocumentedException("Lsp object missing.", PCEPErrors.LSP_MISSING);
 122                 }
 123                 if (!objects.isEmpty()) {
 124                         final PathBuilder pBuilder = new PathBuilder();
 125                         if (objects.get(0) instanceof Ero) {
 126                                 pBuilder.setEro((Ero) objects.get(0));
 127                                 objects.remove(0);
 128                         } else {
 129                                 throw new PCEPDocumentedException("Ero object missing.", PCEPErrors.ERO_MISSING);
 130                         }
 131                         parsePath(objects, pBuilder);
 132                         builder.setPath(pBuilder.build());
 133                 }
 134                 return builder.build();
 135         }
 136
 137         private void parsePath(final List<Object> objects, final PathBuilder pBuilder) throws PCEPDocumentedException {
 138                 final List<Metrics> pathMetrics = Lists.newArrayList();
 139                 Object obj;
 140                 State state = State.Init;
 141                 while (!objects.isEmpty() && !state.equals(State.End)) {
 142                         obj = objects.get(0);
 143                         switch (state) {
 144                         case Init:
 145                                 state = State.LspaIn;
 146                                 if (obj instanceof Lspa) {
 147                                         pBuilder.setLspa((Lspa) obj);
 148                                         break;
 149                                 }
 150                         case LspaIn:
 151                                 state = State.BandwidthIn;
 152                                 if (obj instanceof Bandwidth) {
 153                                         pBuilder.setBandwidth((Bandwidth) obj);
 154                                         break;
 155                                 }
 156                         case BandwidthIn:
 157                                 state = State.MetricIn;
 158                                 if (obj instanceof Metric) {
 159                                         pathMetrics.add(new MetricsBuilder().setMetric((Metric) obj).build());
 160                                         state = State.BandwidthIn;
 161                                         break;
 162                                 }
 163                         case MetricIn:
 164                                 state = State.IroIn;
 165                                 if (obj instanceof Iro) {
 166                                         pBuilder.setIro((Iro) obj);
 167                                         break;
 168                                 }
 169                         case IroIn:
 170                                 state = State.End;
 171                                 break;
 172                         case End:
 173                                 break;
 174                         default:
 175                                 if (obj instanceof UnknownObject) {
 176                                         throw new PCEPDocumentedException("Unknown object", ((UnknownObject) obj).getError());
 177                                 }
 178                         }
 179                         if (!state.equals(State.End)) {
 180                                 objects.remove(0);
 181                         }
 182                 }
 183                 if (!pathMetrics.isEmpty()) {
 184                         pBuilder.setMetrics(pathMetrics);
 185                 }
 186         }
 187
 188         private enum State {
 189                 Init, LspaIn, BandwidthIn, MetricIn, IroIn, End
 190         }
 191
 192         @Override
 193         public int getMessageType() {
 194                 return TYPE;
 195         }
 196 }