pcep/ietf-stateful02/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful02/Stateful02PCUpdateRequestMessageParser.java

   1 /*
   2  * Copyright (c) 2014 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.ietf.stateful02;
   9
  10 import io.netty.buffer.ByteBuf;
  11 import io.netty.buffer.Unpooled;
  12
  13 import java.util.List;
  14
  15 import org.opendaylight.protocol.pcep.spi.AbstractMessageParser;
  16 import org.opendaylight.protocol.pcep.spi.MessageUtil;
  17 import org.opendaylight.protocol.pcep.spi.ObjectRegistry;
  18 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  19 import org.opendaylight.protocol.pcep.spi.PCEPErrors;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.Pcupd;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.PcupdBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.lsp.object.Lsp;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.PcupdMessageBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.pcupd.message.Updates;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.pcupd.message.UpdatesBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.pcupd.message.updates.Path;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.pcupd.message.updates.PathBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.bandwidth.object.Bandwidth;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Ero;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.include.route.object.Iro;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.Metrics;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.MetricsBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.Lspa;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.metric.object.Metric;
  37
  38 import com.google.common.collect.Lists;
  39
  40 /**
  41  * Parser for {@link Pcupd}
  42  */
  43 public final class Stateful02PCUpdateRequestMessageParser extends AbstractMessageParser {
  44
  45         public static final int TYPE = 11;
  46
  47         public Stateful02PCUpdateRequestMessageParser(final ObjectRegistry registry) {
  48                 super(registry);
  49         }
  50
  51         @Override
  52         public void serializeMessage(final Message message, final ByteBuf out) {
  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                 ByteBuf buffer = Unpooled.buffer();
  60                 for (final Updates update : updates) {
  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                 MessageUtil.formatMessage(TYPE, buffer, out);
  82         }
  83
  84         @Override
  85         protected Message validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException {
  86                 if (objects == null) {
  87                         throw new IllegalArgumentException("Passed list can't be null.");
  88                 }
  89                 if (objects.isEmpty()) {
  90                         throw new PCEPDeserializerException("Pcup message cannot be empty.");
  91                 }
  92
  93                 final List<Updates> updateRequests = Lists.newArrayList();
  94
  95                 while (!objects.isEmpty()) {
  96                         final Updates update = getValidUpdates(objects, errors);
  97                         if (update != null) {
  98                                 updateRequests.add(update);
  99                         }
 100                 }
 101                 if (!objects.isEmpty()) {
 102                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
 103                 }
 104                 return new PcupdBuilder().setPcupdMessage(new PcupdMessageBuilder().setUpdates(updateRequests).build()).build();
 105         }
 106
 107         private Updates getValidUpdates(final List<Object> objects, final List<Message> errors) {
 108                 final UpdatesBuilder builder = new UpdatesBuilder();
 109                 if (objects.get(0) instanceof Lsp) {
 110                         builder.setLsp((Lsp) objects.get(0));
 111                         objects.remove(0);
 112                 } else {
 113                         errors.add(createErrorMsg(PCEPErrors.LSP_MISSING));
 114                         return null;
 115                 }
 116                 if (!objects.isEmpty()) {
 117                         final PathBuilder pBuilder = new PathBuilder();
 118                         if (objects.get(0) instanceof Ero) {
 119                                 pBuilder.setEro((Ero) objects.get(0));
 120                                 objects.remove(0);
 121                         } else {
 122                                 errors.add(createErrorMsg(PCEPErrors.ERO_MISSING));
 123                                 return null;
 124                         }
 125                         parsePath(objects, pBuilder);
 126                         builder.setPath(pBuilder.build());
 127                 }
 128                 return builder.build();
 129         }
 130
 131         private void parsePath(final List<Object> objects, final PathBuilder pBuilder) {
 132                 final List<Metrics> pathMetrics = Lists.newArrayList();
 133                 Object obj;
 134                 State state = State.Init;
 135                 while (!objects.isEmpty() && !state.equals(State.End)) {
 136                         obj = objects.get(0);
 137                         switch (state) {
 138                         case Init:
 139                                 state = State.LspaIn;
 140                                 if (obj instanceof Lspa) {
 141                                         pBuilder.setLspa((Lspa) obj);
 142                                         break;
 143                                 }
 144                         case LspaIn:
 145                                 state = State.BandwidthIn;
 146                                 if (obj instanceof Bandwidth) {
 147                                         pBuilder.setBandwidth((Bandwidth) obj);
 148                                         break;
 149                                 }
 150                         case BandwidthIn:
 151                                 state = State.MetricIn;
 152                                 if (obj instanceof Metric) {
 153                                         pathMetrics.add(new MetricsBuilder().setMetric((Metric) obj).build());
 154                                         state = State.BandwidthIn;
 155                                         break;
 156                                 }
 157                         case MetricIn:
 158                                 state = State.IroIn;
 159                                 if (obj instanceof Iro) {
 160                                         pBuilder.setIro((Iro) obj);
 161                                         break;
 162                                 }
 163                         case IroIn:
 164                                 state = State.End;
 165                                 break;
 166                         case End:
 167                                 break;
 168                         }
 169                         if (!state.equals(State.End)) {
 170                                 objects.remove(0);
 171                         }
 172                 }
 173                 if (!pathMetrics.isEmpty()) {
 174                         pBuilder.setMetrics(pathMetrics);
 175                 }
 176         }
 177
 178         private enum State {
 179                 Init, LspaIn, BandwidthIn, MetricIn, IroIn, End
 180         }
 181
 182         @Override
 183         public int getMessageType() {
 184                 return TYPE;
 185         }
 186 }