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

   1 /*
   2  * Copyright (C) 2014 Red Hat, Inc.
   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.net.HttpURLConnection;
  12
  13 import java.util.ArrayList;
  14 import java.util.HashMap;
  15 import java.util.Iterator;
  16 import java.util.List;
  17
  18 import javax.ws.rs.Consumes;
  19 import javax.ws.rs.DELETE;
  20 import javax.ws.rs.GET;
  21 import javax.ws.rs.POST;
  22 import javax.ws.rs.PUT;
  23 import javax.ws.rs.Path;
  24 import javax.ws.rs.PathParam;
  25 import javax.ws.rs.Produces;
  26 import javax.ws.rs.QueryParam;
  27 import javax.ws.rs.core.MediaType;
  28 import javax.ws.rs.core.Response;
  29
  30 import org.codehaus.enunciate.jaxrs.ResponseCode;
  31 import org.codehaus.enunciate.jaxrs.StatusCodes;
  32 import org.opendaylight.neutron.spi.INeutronLoadBalancerHealthMonitorAware;
  33 import org.opendaylight.neutron.spi.INeutronLoadBalancerHealthMonitorCRUD;
  34 import org.opendaylight.neutron.spi.NeutronCRUDInterfaces;
  35 import org.opendaylight.neutron.spi.NeutronLoadBalancer;
  36 import org.opendaylight.neutron.spi.NeutronLoadBalancerHealthMonitor;
  37
  38 /**
  39  * Neutron Northbound REST APIs for Load Balancer HealthMonitor.<br>
  40  * This class provides REST APIs for managing neutron LoadBalancerHealthMonitor
  41  *
  42  * <br>
  43  * <br>
  44  * Authentication scheme : <b>HTTP Basic</b><br>
  45  * Authentication realm : <b>opendaylight</b><br>
  46  * Transport : <b>HTTP and HTTPS</b><br>
  47  * <br>
  48  * HTTPS Authentication is disabled by default. Administrator can enable it in
  49  * tomcat-server.xml after adding a proper keystore / SSL certificate from a
  50  * trusted authority.<br>
  51  * More info :
  52  * http://tomcat.apache.org/tomcat-7.0-doc/ssl-howto.html#Configuration
  53  *
  54  */
  55 @Path("/lbaas/healthmonitors")
  56 public class NeutronLoadBalancerHealthMonitorNorthbound {
  57
  58     private static final int HTTP_OK_BOTTOM = 200;
  59     private static final int HTTP_OK_TOP = 299;
  60     private static final String INTERFACE_NAME = "LoadBalancerHealthMonitor CRUD Interface";
  61     private static final String UUID_NO_EXIST = "LoadBalancerHealthMonitor UUID does not exist.";
  62     private static final String NO_PROVIDERS = "No providers registered.  Please try again later";
  63     private static final String NO_PROVIDER_LIST = "Couldn't get providers list.  Please try again later";
  64
  65
  66     private NeutronLoadBalancerHealthMonitor extractFields(NeutronLoadBalancerHealthMonitor o, List<String> fields) {
  67         return o.extractFields(fields);
  68     }
  69
  70     /**
  71      * Returns a list of all LoadBalancerHealthMonitor */
  72     @GET
  73     @Produces({ MediaType.APPLICATION_JSON })
  74     @StatusCodes({
  75             @ResponseCode(code = HttpURLConnection.HTTP_OK, condition = "Operation successful"),
  76             @ResponseCode(code = HttpURLConnection.HTTP_UNAUTHORIZED, condition = "Unauthorized"),
  77             @ResponseCode(code = HttpURLConnection.HTTP_NOT_IMPLEMENTED, condition = "Not Implemented"),
  78             @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
  79
  80     public Response listGroups(
  81             // return fields
  82             @QueryParam("fields") List<String> fields,
  83             // OpenStack LoadBalancerHealthMonitor attributes
  84             @QueryParam("id") String queryLoadBalancerHealthMonitorID,
  85             @QueryParam("tenant_id") String queryLoadBalancerHealthMonitorTenantID,
  86             // TODO "type" is being a property by the JSON parser.
  87             @QueryParam("type") String queryLoadBalancerHealthMonitorType,
  88             @QueryParam("delay") Integer queryLoadBalancerHealthMonitorDelay,
  89             @QueryParam("timeout") Integer queryLoadBalancerHealthMonitorTimeout,
  90             @QueryParam("max_retries") Integer queryLoadBalancerHealthMonitorMaxRetries,
  91             @QueryParam("http_method") String queryLoadBalancerHealthMonitorHttpMethod,
  92             @QueryParam("url_path") String queryLoadBalancerHealthMonitorUrlPath,
  93             @QueryParam("expected_codes") String queryLoadBalancerHealthMonitorExpectedCodes,
  94             @QueryParam("admin_state_up") Boolean queryLoadBalancerHealthMonitorIsAdminStateUp,
  95             // pagination
  96             @QueryParam("limit") String limit,
  97             @QueryParam("marker") String marker,
  98             @QueryParam("page_reverse") String pageReverse
  99             // sorting not supported
 100     ) {
 101         INeutronLoadBalancerHealthMonitorCRUD loadBalancerHealthMonitorInterface = NeutronCRUDInterfaces
 102                 .getINeutronLoadBalancerHealthMonitorCRUD(this);
 103         if (loadBalancerHealthMonitorInterface == null) {
 104             throw new ServiceUnavailableException(INTERFACE_NAME
 105                     + RestMessages.SERVICEUNAVAILABLE.toString());
 106         }
 107         List<NeutronLoadBalancerHealthMonitor> allLoadBalancerHealthMonitors = loadBalancerHealthMonitorInterface.getAllNeutronLoadBalancerHealthMonitors();
 108         List<NeutronLoadBalancerHealthMonitor> ans = new ArrayList<NeutronLoadBalancerHealthMonitor>();
 109         Iterator<NeutronLoadBalancerHealthMonitor> i = allLoadBalancerHealthMonitors.iterator();
 110         while (i.hasNext()) {
 111             NeutronLoadBalancerHealthMonitor nsg = i.next();
 112             if ((queryLoadBalancerHealthMonitorID == null ||
 113                     queryLoadBalancerHealthMonitorID.equals(nsg.getLoadBalancerHealthMonitorID())) &&
 114                     (queryLoadBalancerHealthMonitorTenantID == null ||
 115                             queryLoadBalancerHealthMonitorTenantID.equals
 116                                     (nsg.getLoadBalancerHealthMonitorTenantID())) &&
 117                     (queryLoadBalancerHealthMonitorType == null ||
 118                             queryLoadBalancerHealthMonitorType.equals
 119                                     (nsg.getLoadBalancerHealthMonitorType())) &&
 120                     (queryLoadBalancerHealthMonitorDelay == null ||
 121                             queryLoadBalancerHealthMonitorDelay.equals
 122                                     (nsg.getLoadBalancerHealthMonitorDelay())) &&
 123                     (queryLoadBalancerHealthMonitorTimeout == null ||
 124                             queryLoadBalancerHealthMonitorTimeout.equals
 125                                     (nsg.getLoadBalancerHealthMonitorTimeout())) &&
 126                     (queryLoadBalancerHealthMonitorMaxRetries == null ||
 127                             queryLoadBalancerHealthMonitorMaxRetries.equals
 128                                     (nsg.getLoadBalancerHealthMonitorMaxRetries())) &&
 129                     (queryLoadBalancerHealthMonitorHttpMethod == null ||
 130                             queryLoadBalancerHealthMonitorHttpMethod.equals
 131                                     (nsg.getLoadBalancerHealthMonitorHttpMethod())) &&
 132                     (queryLoadBalancerHealthMonitorUrlPath == null ||
 133                             queryLoadBalancerHealthMonitorUrlPath.equals
 134                                     (nsg.getLoadBalancerHealthMonitorUrlPath())) &&
 135                     (queryLoadBalancerHealthMonitorExpectedCodes == null ||
 136                             queryLoadBalancerHealthMonitorExpectedCodes.equals
 137                                     (nsg.getLoadBalancerHealthMonitorExpectedCodes())) &&
 138                     (queryLoadBalancerHealthMonitorIsAdminStateUp == null ||
 139                             queryLoadBalancerHealthMonitorIsAdminStateUp.equals
 140                                     (nsg.getLoadBalancerHealthMonitorAdminStateIsUp()))) {
 141                 if (fields.size() > 0) {
 142                     ans.add(extractFields(nsg,fields));
 143                 } else {
 144                     ans.add(nsg);
 145                 }
 146             }
 147         }
 148         return Response.status(HttpURLConnection.HTTP_OK).entity(
 149                 new NeutronLoadBalancerHealthMonitorRequest(ans)).build();
 150     }
 151
 152     /**
 153      * Returns a specific LoadBalancerHealthMonitor */
 154
 155     @Path("{loadBalancerHealthMonitorID}")
 156     @GET
 157     @Produces({ MediaType.APPLICATION_JSON })
 158     @StatusCodes({
 159             @ResponseCode(code = HttpURLConnection.HTTP_OK, condition = "Operation successful"),
 160             @ResponseCode(code = HttpURLConnection.HTTP_UNAUTHORIZED, condition = "Unauthorized"),
 161             @ResponseCode(code = HttpURLConnection.HTTP_NOT_FOUND, condition = "Not Found"),
 162             @ResponseCode(code = HttpURLConnection.HTTP_NOT_IMPLEMENTED, condition = "Not Implemented"),
 163             @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
 164     public Response showLoadBalancerHealthMonitor(@PathParam("loadBalancerHealthMonitorID") String loadBalancerHealthMonitorID,
 165             // return fields
 166             @QueryParam("fields") List<String> fields) {
 167         INeutronLoadBalancerHealthMonitorCRUD loadBalancerHealthMonitorInterface = NeutronCRUDInterfaces.getINeutronLoadBalancerHealthMonitorCRUD(this);
 168         if (loadBalancerHealthMonitorInterface == null) {
 169             throw new ServiceUnavailableException(INTERFACE_NAME
 170                     + RestMessages.SERVICEUNAVAILABLE.toString());
 171         }
 172         if (!loadBalancerHealthMonitorInterface.neutronLoadBalancerHealthMonitorExists(loadBalancerHealthMonitorID)) {
 173             throw new ResourceNotFoundException(UUID_NO_EXIST);
 174         }
 175         if (fields.size() > 0) {
 176             NeutronLoadBalancerHealthMonitor ans = loadBalancerHealthMonitorInterface.getNeutronLoadBalancerHealthMonitor(loadBalancerHealthMonitorID);
 177             return Response.status(HttpURLConnection.HTTP_OK).entity(
 178                     new NeutronLoadBalancerHealthMonitorRequest(extractFields(ans, fields))).build();
 179         } else {
 180             return Response.status(HttpURLConnection.HTTP_OK).entity(new NeutronLoadBalancerHealthMonitorRequest(loadBalancerHealthMonitorInterface.getNeutronLoadBalancerHealthMonitor(loadBalancerHealthMonitorID))).build();
 181         }
 182     }
 183
 184     /**
 185      * Creates new LoadBalancerHealthMonitor */
 186
 187     @POST
 188     @Produces({ MediaType.APPLICATION_JSON })
 189     @Consumes({ MediaType.APPLICATION_JSON })
 190     @StatusCodes({
 191             @ResponseCode(code = HttpURLConnection.HTTP_CREATED, condition = "Created"),
 192             @ResponseCode(code = HttpURLConnection.HTTP_BAD_REQUEST, condition = "Bad Request"),
 193             @ResponseCode(code = HttpURLConnection.HTTP_UNAUTHORIZED, condition = "Unauthorized"),
 194             @ResponseCode(code = HttpURLConnection.HTTP_FORBIDDEN, condition = "Forbidden"),
 195             @ResponseCode(code = HttpURLConnection.HTTP_NOT_FOUND, condition = "Not Found"),
 196             @ResponseCode(code = HttpURLConnection.HTTP_CONFLICT, condition = "Conflict"),
 197             @ResponseCode(code = HttpURLConnection.HTTP_NOT_IMPLEMENTED, condition = "Not Implemented"),
 198             @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
 199     public Response createLoadBalancerHealthMonitors(final NeutronLoadBalancerHealthMonitorRequest input) {
 200         INeutronLoadBalancerHealthMonitorCRUD loadBalancerHealthMonitorInterface = NeutronCRUDInterfaces.getINeutronLoadBalancerHealthMonitorCRUD(this);
 201         if (loadBalancerHealthMonitorInterface == null) {
 202             throw new ServiceUnavailableException(INTERFACE_NAME
 203                     + RestMessages.SERVICEUNAVAILABLE.toString());
 204         }
 205         if (input.isSingleton()) {
 206             NeutronLoadBalancerHealthMonitor singleton = input.getSingleton();
 207
 208             /*
 209              *  Verify that the LoadBalancerHealthMonitor doesn't already exist.
 210              */
 211             if (loadBalancerHealthMonitorInterface.neutronLoadBalancerHealthMonitorExists(singleton.getLoadBalancerHealthMonitorID())) {
 212                 throw new BadRequestException("LoadBalancerHealthMonitor UUID already exists");
 213             }
 214
 215             Object[] instances = NeutronUtil.getInstances(INeutronLoadBalancerHealthMonitorAware.class, this);
 216             if (instances != null) {
 217                 if (instances.length > 0) {
 218                     for (Object instance : instances) {
 219                         INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
 220                         int status = service.canCreateNeutronLoadBalancerHealthMonitor(singleton);
 221                         if (status < HTTP_OK_BOTTOM || status > HTTP_OK_TOP) {
 222                             return Response.status(status).build();
 223                         }
 224                     }
 225                 } else {
 226                     throw new ServiceUnavailableException(NO_PROVIDERS);
 227                 }
 228             } else {
 229                 throw new ServiceUnavailableException(NO_PROVIDER_LIST);
 230             }
 231             loadBalancerHealthMonitorInterface.addNeutronLoadBalancerHealthMonitor(singleton);
 232             if (instances != null) {
 233                 for (Object instance : instances) {
 234                     INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
 235                     service.neutronLoadBalancerHealthMonitorCreated(singleton);
 236                 }
 237             }
 238         } else {
 239             List<NeutronLoadBalancerHealthMonitor> bulk = input.getBulk();
 240             Iterator<NeutronLoadBalancerHealthMonitor> i = bulk.iterator();
 241             HashMap<String, NeutronLoadBalancerHealthMonitor> testMap = new HashMap<String, NeutronLoadBalancerHealthMonitor>();
 242             Object[] instances = NeutronUtil.getInstances(INeutronLoadBalancerHealthMonitorAware.class, this);
 243             while (i.hasNext()) {
 244                 NeutronLoadBalancerHealthMonitor test = i.next();
 245
 246                 /*
 247                  *  Verify that the firewall policy doesn't already exist
 248                  */
 249
 250                 if (loadBalancerHealthMonitorInterface
 251                         .neutronLoadBalancerHealthMonitorExists(test.getLoadBalancerHealthMonitorID())) {
 252                     throw new BadRequestException("LoadBalancerHealthMonitor UUID already is already created");
 253                 }
 254                 if (testMap.containsKey(test.getLoadBalancerHealthMonitorID())) {
 255                     throw new BadRequestException("LoadBalancerHealthMonitor UUID already exists");
 256                 }
 257                 if (instances != null) {
 258                     if (instances.length > 0) {
 259                         for (Object instance : instances) {
 260                             INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
 261                             int status = service.canCreateNeutronLoadBalancerHealthMonitor(test);
 262                             if (status < HTTP_OK_BOTTOM || status > HTTP_OK_TOP) {
 263                                 return Response.status(status).build();
 264                             }
 265                         }
 266                     } else {
 267                         throw new ServiceUnavailableException(NO_PROVIDERS);
 268                     }
 269                 } else {
 270                     throw new ServiceUnavailableException(NO_PROVIDER_LIST);
 271                 }
 272             }
 273             /*
 274              * now, each element of the bulk request can be added to the cache
 275              */
 276             i = bulk.iterator();
 277             while (i.hasNext()) {
 278                 NeutronLoadBalancerHealthMonitor test = i.next();
 279                 loadBalancerHealthMonitorInterface.addNeutronLoadBalancerHealthMonitor(test);
 280                 if (instances != null) {
 281                     for (Object instance : instances) {
 282                         INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
 283                         service.neutronLoadBalancerHealthMonitorCreated(test);
 284                     }
 285                 }
 286             }
 287         }
 288         return Response.status(HttpURLConnection.HTTP_CREATED).entity(input).build();
 289     }
 290
 291     /**
 292      * Updates a LoadBalancerHealthMonitor Policy
 293      */
 294     @Path("{loadBalancerHealthMonitorID}")
 295     @PUT
 296     @Produces({ MediaType.APPLICATION_JSON })
 297     @Consumes({ MediaType.APPLICATION_JSON })
 298     @StatusCodes({
 299             @ResponseCode(code = HttpURLConnection.HTTP_OK, condition = "Operation successful"),
 300             @ResponseCode(code = HttpURLConnection.HTTP_BAD_REQUEST, condition = "Bad Request"),
 301             @ResponseCode(code = HttpURLConnection.HTTP_UNAUTHORIZED, condition = "Unauthorized"),
 302             @ResponseCode(code = HttpURLConnection.HTTP_FORBIDDEN, condition = "Forbidden"),
 303             @ResponseCode(code = HttpURLConnection.HTTP_NOT_FOUND, condition = "Not Found"),
 304             @ResponseCode(code = HttpURLConnection.HTTP_NOT_IMPLEMENTED, condition = "Not Implemented"),
 305             @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
 306     public Response updateLoadBalancerHealthMonitor(
 307             @PathParam("loadBalancerHealthMonitorID") String loadBalancerHealthMonitorID,
 308             final NeutronLoadBalancerHealthMonitorRequest input) {
 309         INeutronLoadBalancerHealthMonitorCRUD loadBalancerHealthMonitorInterface = NeutronCRUDInterfaces
 310                 .getINeutronLoadBalancerHealthMonitorCRUD(this);
 311         if (loadBalancerHealthMonitorInterface == null) {
 312             throw new ServiceUnavailableException(INTERFACE_NAME
 313                     + RestMessages.SERVICEUNAVAILABLE.toString());
 314         }
 315
 316         /*
 317          * verify the LoadBalancerHealthMonitor exists and there is only one delta provided
 318          */
 319         if (!loadBalancerHealthMonitorInterface.neutronLoadBalancerHealthMonitorExists(loadBalancerHealthMonitorID)) {
 320             throw new ResourceNotFoundException(UUID_NO_EXIST);
 321         }
 322         if (!input.isSingleton()) {
 323             throw new BadRequestException("Only singleton edit supported");
 324         }
 325         NeutronLoadBalancerHealthMonitor delta = input.getSingleton();
 326         NeutronLoadBalancerHealthMonitor original = loadBalancerHealthMonitorInterface
 327                 .getNeutronLoadBalancerHealthMonitor(loadBalancerHealthMonitorID);
 328
 329         /*
 330          * updates restricted by Neutron
 331          */
 332         if (delta.getLoadBalancerHealthMonitorID() != null ||
 333                 delta.getLoadBalancerHealthMonitorTenantID() != null ||
 334                 delta.getLoadBalancerHealthMonitorType() != null ||
 335                 delta.getLoadBalancerHealthMonitorDelay() != null ||
 336                 delta.getLoadBalancerHealthMonitorTimeout() != null ||
 337                 delta.getLoadBalancerHealthMonitorMaxRetries() != null ||
 338                 delta.getLoadBalancerHealthMonitorHttpMethod() != null ||
 339                 delta.getLoadBalancerHealthMonitorUrlPath() != null ||
 340                 delta.getLoadBalancerHealthMonitorExpectedCodes() != null ||
 341                 delta.getLoadBalancerHealthMonitorAdminStateIsUp() != null) {
 342             throw new BadRequestException("Attribute edit blocked by Neutron");
 343         }
 344
 345         Object[] instances = NeutronUtil.getInstances(INeutronLoadBalancerHealthMonitorAware.class, this);
 346         if (instances != null) {
 347             if (instances.length > 0) {
 348                 for (Object instance : instances) {
 349                     INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
 350                     int status = service.canUpdateNeutronLoadBalancerHealthMonitor(delta, original);
 351                     if (status < HTTP_OK_BOTTOM || status > HTTP_OK_TOP) {
 352                         return Response.status(status).build();
 353                     }
 354                 }
 355             } else {
 356                 throw new ServiceUnavailableException(NO_PROVIDERS);
 357             }
 358         } else {
 359             throw new ServiceUnavailableException(NO_PROVIDER_LIST);
 360         }
 361
 362         /*
 363          * update the object and return it
 364          */
 365         loadBalancerHealthMonitorInterface.updateNeutronLoadBalancerHealthMonitor(loadBalancerHealthMonitorID, delta);
 366         NeutronLoadBalancerHealthMonitor updatedLoadBalancerHealthMonitor = loadBalancerHealthMonitorInterface
 367                 .getNeutronLoadBalancerHealthMonitor(loadBalancerHealthMonitorID);
 368         if (instances != null) {
 369             for (Object instance : instances) {
 370                 INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
 371                 service.neutronLoadBalancerHealthMonitorUpdated(updatedLoadBalancerHealthMonitor);
 372             }
 373         }
 374         return Response.status(HttpURLConnection.HTTP_OK).entity(new NeutronLoadBalancerHealthMonitorRequest
 375                 (loadBalancerHealthMonitorInterface.getNeutronLoadBalancerHealthMonitor
 376                         (loadBalancerHealthMonitorID))).build();
 377     }
 378
 379
 380
 381     /**
 382      * Deletes a LoadBalancerHealthMonitor
 383      * */
 384     @Path("{loadBalancerHealthMonitorID}")
 385     @DELETE
 386     @StatusCodes({
 387             @ResponseCode(code = HttpURLConnection.HTTP_NO_CONTENT, condition = "No Content"),
 388             @ResponseCode(code = HttpURLConnection.HTTP_UNAUTHORIZED, condition = "Unauthorized"),
 389             @ResponseCode(code = HttpURLConnection.HTTP_NOT_FOUND, condition = "Not Found"),
 390             @ResponseCode(code = HttpURLConnection.HTTP_CONFLICT, condition = "Conflict"),
 391             @ResponseCode(code = HttpURLConnection.HTTP_NOT_IMPLEMENTED, condition = "Not Implemented"),
 392             @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
 393     public Response deleteLoadBalancerHealthMonitor(
 394             @PathParam("loadBalancerHealthMonitorID") String loadBalancerHealthMonitorID) {
 395         INeutronLoadBalancerHealthMonitorCRUD loadBalancerHealthMonitorInterface = NeutronCRUDInterfaces.getINeutronLoadBalancerHealthMonitorCRUD(this);
 396         if (loadBalancerHealthMonitorInterface == null) {
 397             throw new ServiceUnavailableException(INTERFACE_NAME
 398                     + RestMessages.SERVICEUNAVAILABLE.toString());
 399         }
 400         /*
 401          * verify the LoadBalancerHealthMonitor exists and it isn't currently in use
 402          */
 403         if (!loadBalancerHealthMonitorInterface.neutronLoadBalancerHealthMonitorExists(loadBalancerHealthMonitorID)) {
 404             throw new ResourceNotFoundException(UUID_NO_EXIST);
 405         }
 406         if (loadBalancerHealthMonitorInterface.neutronLoadBalancerHealthMonitorInUse(loadBalancerHealthMonitorID)) {
 407             return Response.status(HttpURLConnection.HTTP_CONFLICT).build();
 408         }
 409         NeutronLoadBalancerHealthMonitor singleton = loadBalancerHealthMonitorInterface.getNeutronLoadBalancerHealthMonitor(loadBalancerHealthMonitorID);
 410         Object[] instances = NeutronUtil.getInstances(INeutronLoadBalancerHealthMonitorAware.class, this);
 411         if (instances != null) {
 412             if (instances.length > 0) {
 413                 for (Object instance : instances) {
 414                     INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
 415                     int status = service.canDeleteNeutronLoadBalancerHealthMonitor(singleton);
 416                     if (status < HTTP_OK_BOTTOM || status > HTTP_OK_TOP) {
 417                         return Response.status(status).build();
 418                     }
 419                 }
 420             } else {
 421                 throw new ServiceUnavailableException(NO_PROVIDERS);
 422             }
 423         } else {
 424             throw new ServiceUnavailableException(NO_PROVIDER_LIST);
 425         }
 426         loadBalancerHealthMonitorInterface.removeNeutronLoadBalancerHealthMonitor(loadBalancerHealthMonitorID);
 427         if (instances != null) {
 428             for (Object instance : instances) {
 429                 INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
 430                 service.neutronLoadBalancerHealthMonitorDeleted(singleton);
 431             }
 432         }
 433         return Response.status(HttpURLConnection.HTTP_NO_CONTENT).build();
 434     }
 435 }