northbound-api/src/main/java/org/opendaylight/neutron/northbound/api/NeutronPortsNorthbound.java

   1 /*
   2  * Copyright IBM Corporation, 2013.  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.neutron.northbound.api;
  10
  11 import java.util.ArrayList;
  12 import java.util.HashMap;
  13 import java.util.Iterator;
  14 import java.util.List;
  15
  16 import javax.ws.rs.Consumes;
  17 import javax.ws.rs.DELETE;
  18 import javax.ws.rs.DefaultValue;
  19 import javax.ws.rs.GET;
  20 import javax.ws.rs.POST;
  21 import javax.ws.rs.PUT;
  22 import javax.ws.rs.Path;
  23 import javax.ws.rs.PathParam;
  24 import javax.ws.rs.Produces;
  25 import javax.ws.rs.QueryParam;
  26 import javax.ws.rs.core.Context;
  27 import javax.ws.rs.core.MediaType;
  28 import javax.ws.rs.core.Response;
  29 import javax.ws.rs.core.UriInfo;
  30
  31 import org.codehaus.enunciate.jaxrs.ResponseCode;
  32 import org.codehaus.enunciate.jaxrs.StatusCodes;
  33 import org.opendaylight.neutron.spi.INeutronNetworkCRUD;
  34 import org.opendaylight.neutron.spi.INeutronPortAware;
  35 import org.opendaylight.neutron.spi.INeutronPortCRUD;
  36 import org.opendaylight.neutron.spi.INeutronSubnetCRUD;
  37 import org.opendaylight.neutron.spi.NeutronCRUDInterfaces;
  38 import org.opendaylight.neutron.spi.NeutronPort;
  39 import org.opendaylight.neutron.spi.NeutronSubnet;
  40 import org.opendaylight.neutron.spi.Neutron_IPs;
  41
  42 /**
  43  * Neutron Northbound REST APIs.<br>
  44  * This class provides REST APIs for managing neutron port objects
  45  *
  46  * <br>
  47  * <br>
  48  * Authentication scheme : <b>HTTP Basic</b><br>
  49  * Authentication realm : <b>opendaylight</b><br>
  50  * Transport : <b>HTTP and HTTPS</b><br>
  51  * <br>
  52  * HTTPS Authentication is disabled by default. Administrator can enable it in
  53  * tomcat-server.xml after adding a proper keystore / SSL certificate from a
  54  * trusted authority.<br>
  55  * More info :
  56  * http://tomcat.apache.org/tomcat-7.0-doc/ssl-howto.html#Configuration
  57  *
  58  */
  59
  60 @Path("/ports")
  61 public class NeutronPortsNorthbound {
  62
  63     final String mac_regex="^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$";
  64
  65     private NeutronPort extractFields(NeutronPort o, List<String> fields) {
  66         return o.extractFields(fields);
  67     }
  68
  69     @Context
  70     UriInfo uriInfo;
  71
  72     /**
  73      * Returns a list of all Ports */
  74
  75     @GET
  76     @Produces({ MediaType.APPLICATION_JSON })
  77     //@TypeHint(OpenStackPorts.class)
  78     @StatusCodes({
  79         @ResponseCode(code = 200, condition = "Operation successful"),
  80         @ResponseCode(code = 401, condition = "Unauthorized"),
  81         @ResponseCode(code = 501, condition = "Not Implemented"),
  82         @ResponseCode(code = 503, condition = "No providers available") })
  83     public Response listPorts(
  84             // return fields
  85             @QueryParam("fields") List<String> fields,
  86             // note: openstack isn't clear about filtering on lists, so we aren't handling them
  87             @QueryParam("id") String queryID,
  88             @QueryParam("network_id") String queryNetworkID,
  89             @QueryParam("name") String queryName,
  90             @QueryParam("admin_state_up") String queryAdminStateUp,
  91             @QueryParam("status") String queryStatus,
  92             @QueryParam("mac_address") String queryMACAddress,
  93             @QueryParam("device_id") String queryDeviceID,
  94             @QueryParam("device_owner") String queryDeviceOwner,
  95             @QueryParam("tenant_id") String queryTenantID,
  96             // linkTitle
  97             @QueryParam("limit") Integer limit,
  98             @QueryParam("marker") String marker,
  99             @DefaultValue("false") @QueryParam("page_reverse") Boolean pageReverse
 100             // sorting not supported
 101             ) {
 102         INeutronPortCRUD portInterface = NeutronCRUDInterfaces.getINeutronPortCRUD(this);
 103         if (portInterface == null) {
 104             throw new ServiceUnavailableException("Port CRUD Interface "
 105                     + RestMessages.SERVICEUNAVAILABLE.toString());
 106         }
 107         List<NeutronPort> allPorts = portInterface.getAllPorts();
 108         List<NeutronPort> ans = new ArrayList<NeutronPort>();
 109         Iterator<NeutronPort> i = allPorts.iterator();
 110         while (i.hasNext()) {
 111             NeutronPort oSS = i.next();
 112             if ((queryID == null || queryID.equals(oSS.getID())) &&
 113                     (queryNetworkID == null || queryNetworkID.equals(oSS.getNetworkUUID())) &&
 114                     (queryName == null || queryName.equals(oSS.getName())) &&
 115                     (queryAdminStateUp == null || queryAdminStateUp.equals(oSS.getAdminStateUp())) &&
 116                     (queryStatus == null || queryStatus.equals(oSS.getStatus())) &&
 117                     (queryMACAddress == null || queryMACAddress.equals(oSS.getMacAddress())) &&
 118                     (queryDeviceID == null || queryDeviceID.equals(oSS.getDeviceID())) &&
 119                     (queryDeviceOwner == null || queryDeviceOwner.equals(oSS.getDeviceOwner())) &&
 120                     (queryTenantID == null || queryTenantID.equals(oSS.getTenantID()))) {
 121                 if (fields.size() > 0) {
 122                     ans.add(extractFields(oSS,fields));
 123                 } else {
 124                     ans.add(oSS);
 125                 }
 126             }
 127         }
 128
 129         if (limit != null && ans.size() > 1) {
 130             // Return a paginated request
 131             NeutronPortRequest request = (NeutronPortRequest) PaginatedRequestFactory.createRequest(limit,
 132                     marker, pageReverse, uriInfo, ans, NeutronPort.class);
 133             return Response.status(200).entity(request).build();
 134         }
 135
 136         return Response.status(200).entity(
 137                 new NeutronPortRequest(ans)).build();
 138     }
 139
 140     /**
 141      * Returns a specific Port */
 142
 143     @Path("{portUUID}")
 144     @GET
 145     @Produces({ MediaType.APPLICATION_JSON })
 146     //@TypeHint(OpenStackPorts.class)
 147     @StatusCodes({
 148         @ResponseCode(code = 200, condition = "Operation successful"),
 149         @ResponseCode(code = 401, condition = "Unauthorized"),
 150         @ResponseCode(code = 404, condition = "Not Found"),
 151         @ResponseCode(code = 501, condition = "Not Implemented"),
 152         @ResponseCode(code = 503, condition = "No providers available") })
 153     public Response showPort(
 154             @PathParam("portUUID") String portUUID,
 155             // return fields
 156             @QueryParam("fields") List<String> fields ) {
 157         INeutronPortCRUD portInterface = NeutronCRUDInterfaces.getINeutronPortCRUD(this);
 158         if (portInterface == null) {
 159             throw new ServiceUnavailableException("Port CRUD Interface "
 160                     + RestMessages.SERVICEUNAVAILABLE.toString());
 161         }
 162         if (!portInterface.portExists(portUUID)) {
 163             throw new ResourceNotFoundException("port UUID does not exist.");
 164         }
 165         if (fields.size() > 0) {
 166             NeutronPort ans = portInterface.getPort(portUUID);
 167             return Response.status(200).entity(
 168                     new NeutronPortRequest(extractFields(ans, fields))).build();
 169         } else {
 170             return Response.status(200).entity(
 171                     new NeutronPortRequest(portInterface.getPort(portUUID))).build();
 172         }
 173     }
 174
 175     /**
 176      * Creates new Ports */
 177
 178     @POST
 179     @Produces({ MediaType.APPLICATION_JSON })
 180     @Consumes({ MediaType.APPLICATION_JSON })
 181     //@TypeHint(OpenStackPorts.class)
 182     @StatusCodes({
 183         @ResponseCode(code = 201, condition = "Created"),
 184         @ResponseCode(code = 400, condition = "Bad Request"),
 185         @ResponseCode(code = 401, condition = "Unauthorized"),
 186         @ResponseCode(code = 403, condition = "Forbidden"),
 187         @ResponseCode(code = 404, condition = "Not Found"),
 188         @ResponseCode(code = 409, condition = "Conflict"),
 189         @ResponseCode(code = 501, condition = "Not Implemented"),
 190         @ResponseCode(code = 503, condition = "MAC generation failure"),
 191         @ResponseCode(code = 503, condition = "No providers available") })
 192     public Response createPorts(final NeutronPortRequest input) {
 193         INeutronPortCRUD portInterface = NeutronCRUDInterfaces.getINeutronPortCRUD(this);
 194         if (portInterface == null) {
 195             throw new ServiceUnavailableException("Port CRUD Interface "
 196                     + RestMessages.SERVICEUNAVAILABLE.toString());
 197         }
 198         INeutronNetworkCRUD networkInterface = NeutronCRUDInterfaces.getINeutronNetworkCRUD( this);
 199         if (networkInterface == null) {
 200             throw new ServiceUnavailableException("Network CRUD Interface "
 201                     + RestMessages.SERVICEUNAVAILABLE.toString());
 202         }
 203         INeutronSubnetCRUD subnetInterface = NeutronCRUDInterfaces.getINeutronSubnetCRUD( this);
 204         if (subnetInterface == null) {
 205             throw new ServiceUnavailableException("Subnet CRUD Interface "
 206                     + RestMessages.SERVICEUNAVAILABLE.toString());
 207         }
 208         if (input.isSingleton()) {
 209             NeutronPort singleton = input.getSingleton();
 210
 211             /*
 212              * the port must be part of an existing network, must not already exist,
 213              * have a valid MAC and the MAC not be in use
 214              */
 215             if (singleton.getNetworkUUID() == null) {
 216                 throw new BadRequestException("network UUID musy be specified");
 217             }
 218             if (portInterface.portExists(singleton.getID())) {
 219                 throw new BadRequestException("port UUID already exists");
 220             }
 221             if (!networkInterface.networkExists(singleton.getNetworkUUID())) {
 222                 throw new ResourceNotFoundException("network UUID does not exist.");
 223             }
 224             if (singleton.getMacAddress() == null ||
 225                     !singleton.getMacAddress().matches(mac_regex)) {
 226                 throw new BadRequestException("MAC address not properly formatted");
 227             }
 228             if (portInterface.macInUse(singleton.getMacAddress())) {
 229                 throw new ResourceConflictException("MAC Address is in use.");
 230             }
 231             /*
 232              * if fixed IPs are specified, each one has to have an existing subnet ID
 233              * that is in the same scoping network as the port.  In addition, if an IP
 234              * address is specified it has to be a valid address for the subnet and not
 235              * already in use
 236              */
 237             List<Neutron_IPs> fixedIPs = singleton.getFixedIPs();
 238             if (fixedIPs != null && fixedIPs.size() > 0) {
 239                 Iterator<Neutron_IPs> fixedIPIterator = fixedIPs.iterator();
 240                 while (fixedIPIterator.hasNext()) {
 241                     Neutron_IPs ip = fixedIPIterator.next();
 242                     if (ip.getSubnetUUID() == null) {
 243                         throw new BadRequestException("subnet UUID not specified");
 244                     }
 245                     NeutronSubnet subnet = subnetInterface.getSubnet(ip.getSubnetUUID());
 246                     if (subnet == null) {
 247                         throw new BadRequestException("subnet UUID must exist");
 248                     }
 249                     if (!singleton.getNetworkUUID().equalsIgnoreCase(subnet.getNetworkUUID())) {
 250                         throw new BadRequestException("network UUID must match that of subnet");
 251                     }
 252                     if (ip.getIpAddress() != null) {
 253                         if (!subnet.isValidIP(ip.getIpAddress())) {
 254                             throw new BadRequestException("IP address is not valid");
 255                         }
 256                         if (subnet.isIPInUse(ip.getIpAddress())) {
 257                             throw new ResourceConflictException("IP address is in use.");
 258                         }
 259                     }
 260                 }
 261             }
 262
 263             Object[] instances = NeutronUtil.getInstances(INeutronPortAware.class, this);
 264             if (instances != null) {
 265                 if (instances.length > 0) {
 266                     for (Object instance : instances) {
 267                         INeutronPortAware service = (INeutronPortAware) instance;
 268                         int status = service.canCreatePort(singleton);
 269                         if (status < 200 || status > 299) {
 270                             return Response.status(status).build();
 271                         }
 272                     }
 273                 } else {
 274                     throw new ServiceUnavailableException("No providers registered.  Please try again later");
 275                 }
 276             } else {
 277                 throw new ServiceUnavailableException("Couldn't get providers list.  Please try again later");
 278             }
 279
 280             // add the port to the cache
 281             portInterface.addPort(singleton);
 282             if (instances != null) {
 283                 for (Object instance : instances) {
 284                     INeutronPortAware service = (INeutronPortAware) instance;
 285                     service.neutronPortCreated(singleton);
 286                 }
 287             }
 288         } else {
 289             List<NeutronPort> bulk = input.getBulk();
 290             Iterator<NeutronPort> i = bulk.iterator();
 291             HashMap<String, NeutronPort> testMap = new HashMap<String, NeutronPort>();
 292             Object[] instances = NeutronUtil.getInstances(INeutronPortAware.class, this);
 293             while (i.hasNext()) {
 294                 NeutronPort test = i.next();
 295
 296                 /*
 297                  * the port must be part of an existing network, must not already exist,
 298                  * have a valid MAC and the MAC not be in use.  Further the bulk request
 299                  * can't already contain a new port with the same UUID
 300                  */
 301                 if (portInterface.portExists(test.getID())) {
 302                     throw new BadRequestException("port UUID already exists");
 303                 }
 304                 if (testMap.containsKey(test.getID())) {
 305                     throw new BadRequestException("port UUID already exists");
 306                 }
 307                 for (NeutronPort check : testMap.values()) {
 308                     if (test.getMacAddress().equalsIgnoreCase(check.getMacAddress())) {
 309                         throw new ResourceConflictException("MAC address already allocated");
 310                     }
 311                     for (Neutron_IPs test_fixedIP : test.getFixedIPs()) {
 312                         for (Neutron_IPs check_fixedIP : check.getFixedIPs()) {
 313                             if (test_fixedIP.getSubnetUUID().equals(check_fixedIP.getSubnetUUID())) {
 314                                 if (test_fixedIP.getIpAddress().equals(check_fixedIP.getIpAddress())) {
 315                                     throw new ResourceConflictException("IP address already allocated");
 316                                 }
 317                             }
 318                         }
 319                     }
 320                 }
 321                 testMap.put(test.getID(), test);
 322                 if (!networkInterface.networkExists(test.getNetworkUUID())) {
 323                     throw new ResourceNotFoundException("network UUID does not exist.");
 324                 }
 325                 if (!test.getMacAddress().matches(mac_regex)) {
 326                     throw new BadRequestException("MAC address not properly formatted");
 327                 }
 328                 if (portInterface.macInUse(test.getMacAddress())) {
 329                     throw new ResourceConflictException("MAC address in use");
 330                 }
 331
 332                 /*
 333                  * if fixed IPs are specified, each one has to have an existing subnet ID
 334                  * that is in the same scoping network as the port.  In addition, if an IP
 335                  * address is specified it has to be a valid address for the subnet and not
 336                  * already in use (or be the gateway IP address of the subnet)
 337                  */
 338                 List<Neutron_IPs> fixedIPs = test.getFixedIPs();
 339                 if (fixedIPs != null && fixedIPs.size() > 0) {
 340                     Iterator<Neutron_IPs> fixedIPIterator = fixedIPs.iterator();
 341                     while (fixedIPIterator.hasNext()) {
 342                         Neutron_IPs ip = fixedIPIterator.next();
 343                         if (ip.getSubnetUUID() == null) {
 344                             throw new BadRequestException("subnet UUID must be specified");
 345                         }
 346                         if (!subnetInterface.subnetExists(ip.getSubnetUUID())) {
 347                             throw new BadRequestException("subnet UUID doesn't exists");
 348                         }
 349                         NeutronSubnet subnet = subnetInterface.getSubnet(ip.getSubnetUUID());
 350                         if (!test.getNetworkUUID().equalsIgnoreCase(subnet.getNetworkUUID())) {
 351                             throw new BadRequestException("network UUID must match that of subnet");
 352                         }
 353                         if (ip.getIpAddress() != null) {
 354                             if (!subnet.isValidIP(ip.getIpAddress())) {
 355                                 throw new BadRequestException("ip address not valid");
 356                             }
 357                             //TODO: need to add consideration for a fixed IP being assigned the same address as a allocated IP in the
 358                             //same bulk create
 359                             if (subnet.isIPInUse(ip.getIpAddress())) {
 360                                 throw new ResourceConflictException("IP address in use");
 361                             }
 362                         }
 363                     }
 364                 }
 365                 if (instances != null) {
 366                     if (instances.length > 0) {
 367                         for (Object instance : instances) {
 368                             INeutronPortAware service = (INeutronPortAware) instance;
 369                             int status = service.canCreatePort(test);
 370                             if (status < 200 || status > 299) {
 371                                 return Response.status(status).build();
 372                             }
 373                         }
 374                     } else {
 375                         throw new ServiceUnavailableException("No providers registered.  Please try again later");
 376                     }
 377                 } else {
 378                     throw new ServiceUnavailableException("Couldn't get providers list.  Please try again later");
 379                 }
 380             }
 381
 382             //once everything has passed, then we can add to the cache
 383             i = bulk.iterator();
 384             while (i.hasNext()) {
 385                 NeutronPort test = i.next();
 386                 portInterface.addPort(test);
 387                 if (instances != null) {
 388                     for (Object instance : instances) {
 389                         INeutronPortAware service = (INeutronPortAware) instance;
 390                         service.neutronPortCreated(test);
 391                     }
 392                 }
 393             }
 394         }
 395         return Response.status(201).entity(input).build();
 396     }
 397
 398     /**
 399      * Updates a Port */
 400
 401     @Path("{portUUID}")
 402     @PUT
 403     @Produces({ MediaType.APPLICATION_JSON })
 404     @Consumes({ MediaType.APPLICATION_JSON })
 405     //@TypeHint(OpenStackPorts.class)
 406     @StatusCodes({
 407         @ResponseCode(code = 200, condition = "Operation successful"),
 408         @ResponseCode(code = 400, condition = "Bad Request"),
 409         @ResponseCode(code = 401, condition = "Unauthorized"),
 410         @ResponseCode(code = 403, condition = "Forbidden"),
 411         @ResponseCode(code = 404, condition = "Not Found"),
 412         @ResponseCode(code = 409, condition = "Conflict"),
 413         @ResponseCode(code = 501, condition = "Not Implemented"),
 414         @ResponseCode(code = 503, condition = "No providers available") })
 415     public Response updatePort(
 416             @PathParam("portUUID") String portUUID,
 417             NeutronPortRequest input
 418             ) {
 419         INeutronPortCRUD portInterface = NeutronCRUDInterfaces.getINeutronPortCRUD(this);
 420         if (portInterface == null) {
 421             throw new ServiceUnavailableException("Port CRUD Interface "
 422                     + RestMessages.SERVICEUNAVAILABLE.toString());
 423         }
 424         INeutronSubnetCRUD subnetInterface = NeutronCRUDInterfaces.getINeutronSubnetCRUD( this);
 425         if (subnetInterface == null) {
 426             throw new ServiceUnavailableException("Subnet CRUD Interface "
 427                     + RestMessages.SERVICEUNAVAILABLE.toString());
 428         }
 429
 430         // port has to exist and only a single delta is supported
 431         if (!portInterface.portExists(portUUID)) {
 432             throw new ResourceNotFoundException("port UUID does not exist.");
 433         }
 434         NeutronPort target = portInterface.getPort(portUUID);
 435         if (!input.isSingleton()) {
 436             throw new BadRequestException("only singleton edit suported");
 437         }
 438         NeutronPort singleton = input.getSingleton();
 439         NeutronPort original = portInterface.getPort(portUUID);
 440
 441         // deltas restricted by Neutron
 442         if (singleton.getID() != null || singleton.getTenantID() != null ||
 443                 singleton.getStatus() != null) {
 444             throw new BadRequestException("attribute change blocked by Neutron");
 445         }
 446
 447         Object[] instances = NeutronUtil.getInstances(INeutronPortAware.class, this);
 448         if (instances != null) {
 449             if (instances.length > 0) {
 450                 for (Object instance : instances) {
 451                     INeutronPortAware service = (INeutronPortAware) instance;
 452                     int status = service.canUpdatePort(singleton, original);
 453                     if (status < 200 || status > 299) {
 454                         return Response.status(status).build();
 455                     }
 456                 }
 457             } else {
 458                 throw new ServiceUnavailableException("No providers registered.  Please try again later");
 459             }
 460         } else {
 461             throw new ServiceUnavailableException("Couldn't get providers list.  Please try again later");
 462         }
 463
 464         // Verify the new fixed ips are valid
 465         List<Neutron_IPs> fixedIPs = singleton.getFixedIPs();
 466         if (fixedIPs != null && fixedIPs.size() > 0) {
 467             Iterator<Neutron_IPs> fixedIPIterator = fixedIPs.iterator();
 468             while (fixedIPIterator.hasNext()) {
 469                 Neutron_IPs ip = fixedIPIterator.next();
 470                 if (ip.getSubnetUUID() == null) {
 471                     throw new BadRequestException("subnet UUID must be specified");
 472                 }
 473                 if (!subnetInterface.subnetExists(ip.getSubnetUUID())) {
 474                     throw new BadRequestException("subnet UUID doesn't exist.");
 475                 }
 476                 NeutronSubnet subnet = subnetInterface.getSubnet(ip.getSubnetUUID());
 477                 if (!target.getNetworkUUID().equalsIgnoreCase(subnet.getNetworkUUID())) {
 478                     throw new BadRequestException("network UUID must match that of subnet");
 479                 }
 480                 if (ip.getIpAddress() != null) {
 481                     if (!subnet.isValidIP(ip.getIpAddress())) {
 482                         throw new BadRequestException("invalid IP address");
 483                     }
 484                     if (subnet.isIPInUse(ip.getIpAddress())) {
 485                         throw new ResourceConflictException("IP address in use");
 486                     }
 487                 }
 488             }
 489         }
 490
 491         //        TODO: Support change of security groups
 492         // update the port and return the modified object
 493         portInterface.updatePort(portUUID, singleton);
 494         NeutronPort updatedPort = portInterface.getPort(portUUID);
 495         if (instances != null) {
 496             for (Object instance : instances) {
 497                 INeutronPortAware service = (INeutronPortAware) instance;
 498                 service.neutronPortUpdated(updatedPort);
 499             }
 500         }
 501         return Response.status(200).entity(
 502                 new NeutronPortRequest(updatedPort)).build();
 503
 504     }
 505
 506     /**
 507      * Deletes a Port */
 508
 509     @Path("{portUUID}")
 510     @DELETE
 511     @StatusCodes({
 512         @ResponseCode(code = 204, condition = "No Content"),
 513         @ResponseCode(code = 401, condition = "Unauthorized"),
 514         @ResponseCode(code = 403, condition = "Forbidden"),
 515         @ResponseCode(code = 404, condition = "Not Found"),
 516         @ResponseCode(code = 501, condition = "Not Implemented"),
 517         @ResponseCode(code = 503, condition = "No providers available") })
 518     public Response deletePort(
 519             @PathParam("portUUID") String portUUID) {
 520         INeutronPortCRUD portInterface = NeutronCRUDInterfaces.getINeutronPortCRUD(this);
 521         if (portInterface == null) {
 522             throw new ServiceUnavailableException("Port CRUD Interface "
 523                     + RestMessages.SERVICEUNAVAILABLE.toString());
 524         }
 525
 526         // port has to exist and not be owned by anyone.  then it can be removed from the cache
 527         if (!portInterface.portExists(portUUID)) {
 528             throw new ResourceNotFoundException("port UUID does not exist.");
 529         }
 530         NeutronPort port = portInterface.getPort(portUUID);
 531         if (port.getDeviceID() != null ||
 532                 port.getDeviceOwner() != null) {
 533             Response.status(403).build();
 534         }
 535         NeutronPort singleton = portInterface.getPort(portUUID);
 536         Object[] instances = NeutronUtil.getInstances(INeutronPortAware.class, this);
 537         if (instances != null) {
 538             if (instances.length > 0) {
 539                 for (Object instance : instances) {
 540                     INeutronPortAware service = (INeutronPortAware) instance;
 541                     int status = service.canDeletePort(singleton);
 542                     if (status < 200 || status > 299) {
 543                         return Response.status(status).build();
 544                     }
 545                 }
 546             } else {
 547                 throw new ServiceUnavailableException("No providers registered.  Please try again later");
 548             }
 549         } else {
 550             throw new ServiceUnavailableException("Couldn't get providers list.  Please try again later");
 551         }
 552         portInterface.removePort(portUUID);
 553         if (instances != null) {
 554             for (Object instance : instances) {
 555                 INeutronPortAware service = (INeutronPortAware) instance;
 556                 service.neutronPortDeleted(singleton);
 557             }
 558         }
 559         return Response.status(204).build();
 560     }
 561 }