client/src/main/java/com/att/cadi/locator/DME2Locator.java

   1 /*******************************************************************************\r
   2  * ============LICENSE_START====================================================\r
   3  * * org.onap.aaf\r
   4  * * ===========================================================================\r
   5  * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.\r
   6  * * ===========================================================================\r
   7  * * Licensed under the Apache License, Version 2.0 (the "License");\r
   8  * * you may not use this file except in compliance with the License.\r
   9  * * You may obtain a copy of the License at\r
  10  * * \r
  11  *  *      http://www.apache.org/licenses/LICENSE-2.0\r
  12  * * \r
  13  *  * Unless required by applicable law or agreed to in writing, software\r
  14  * * distributed under the License is distributed on an "AS IS" BASIS,\r
  15  * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  16  * * See the License for the specific language governing permissions and\r
  17  * * limitations under the License.\r
  18  * * ============LICENSE_END====================================================\r
  19  * *\r
  20  * * ECOMP is a trademark and service mark of AT&T Intellectual Property.\r
  21  * *\r
  22  ******************************************************************************/\r
  23 package com.att.cadi.locator;\r
  24 \r
  25 \r
  26 import java.net.InetAddress;\r
  27 import java.net.URI;\r
  28 import java.net.URISyntaxException;\r
  29 import java.net.UnknownHostException;\r
  30 import java.util.Arrays;\r
  31 import java.util.Comparator;\r
  32 import java.util.Properties;\r
  33 import java.util.Random;\r
  34 import java.security.SecureRandom;\r
  35 \r
  36 //import com.att.aft.dme2.api.DME2Endpoint;\r
  37 import com.att.aft.dme2.api.DME2Exception;\r
  38 import com.att.aft.dme2.api.DME2Manager;\r
  39 import com.att.aft.dme2.api.DME2Server;\r
  40 import com.att.aft.dme2.manager.registry.DME2Endpoint;\r
  41 import com.att.cadi.Access;\r
  42 import com.att.cadi.Access.Level;\r
  43 import com.att.cadi.Locator;\r
  44 import com.att.cadi.LocatorException;\r
  45 import com.att.cadi.PropAccess;\r
  46 \r
  47 public class DME2Locator implements Locator<URI> {\r
  48         private DME2Manager dm;\r
  49         private DME2Endpoint[] endpoints;\r
  50         private Access access;\r
  51         private String service;\r
  52         private String version;\r
  53         private String routeOffer;\r
  54         private String envContext;\r
  55         private String thisMachine;\r
  56         private String pathInfo;\r
  57         private int thisPort;\r
  58         private boolean removeSelf;\r
  59         private final static SecureRandom random = new SecureRandom();\r
  60 \r
  61         // Default is to not bother trying to remove self\r
  62         public DME2Locator(Access access, DME2Manager dm, String service, String version, String envContext, String routeOffer) throws DME2Exception, UnknownHostException, LocatorException {\r
  63                 this(access,dm,service,version,envContext,routeOffer,false);\r
  64         }\r
  65         \r
  66         public DME2Locator(Access access, DME2Manager dm, String service, String version, String envContext, String routeOffer, boolean removeSelf) throws DME2Exception, UnknownHostException, LocatorException {\r
  67                 this.access = access;\r
  68                 if(dm==null) {\r
  69                         this.dm = new DME2Manager("DME2Locator created DME2Manager",System.getProperties());\r
  70                 } else {\r
  71                         this.dm = dm;\r
  72                 }\r
  73                 this.service = service;\r
  74                 this.version = version;\r
  75                 this.envContext = envContext;\r
  76                 this.routeOffer = routeOffer;\r
  77                 refresh();\r
  78                 if(thisMachine==null) {\r
  79                         // Can't get from dm... \r
  80                         thisMachine = InetAddress.getLocalHost().getHostName();\r
  81                         thisPort = 0;\r
  82                 } else {\r
  83                         thisPort = dm.getPort();\r
  84                 }\r
  85 \r
  86                 this.removeSelf = removeSelf;\r
  87         }\r
  88 \r
  89         // Default is to not bother trying to remove self\r
  90         public DME2Locator(Access access, DME2Manager dm, String aafurl) throws DME2Exception, UnknownHostException, LocatorException {\r
  91                 this(access,dm,aafurl,false);\r
  92         }\r
  93         \r
  94         public DME2Locator(Access access, DME2Manager dm, String aafurl, boolean removeSelf) throws DME2Exception, UnknownHostException, LocatorException {\r
  95                 if(aafurl==null) {\r
  96                         throw new LocatorException("URL is null");\r
  97                 }\r
  98                 this.access = access;\r
  99                 if(dm==null) {\r
 100                         Properties dprops;\r
 101                         if(access instanceof PropAccess) {\r
 102                                 dprops = ((PropAccess)access).getDME2Properties();\r
 103                         } else {\r
 104                                 dprops = System.getProperties();\r
 105                         }\r
 106                         dm = this.dm = new DME2Manager("DME2Locator created DME2Manager",dprops);\r
 107                 } else {\r
 108                         this.dm = dm;\r
 109                 }\r
 110                 String[] split = aafurl.split("/");\r
 111                 StringBuilder sb = new StringBuilder();\r
 112                 boolean dme2Entered = false;\r
 113                 for(String s : split) {\r
 114                         if(s.startsWith("service=")) {\r
 115                                 this.service = s.substring(8);\r
 116                         } else if(s.startsWith("version=")) {\r
 117                                 this.version = s.substring(8);\r
 118                         } else if(s.startsWith("envContext=")) {\r
 119                                 this.envContext = s.substring(11);\r
 120                         } else if(s.startsWith("routeOffer=")) {\r
 121                                 this.routeOffer = s.substring(11);\r
 122                                 dme2Entered = true;\r
 123                         } else if(dme2Entered) {\r
 124                                 sb.append('/');\r
 125                                 sb.append(s);\r
 126                         }\r
 127                 }\r
 128                 pathInfo = sb.toString();\r
 129                 thisMachine = dm.getHostname();\r
 130                 if(thisMachine==null) {\r
 131                         // Can't get from dm... \r
 132                         thisMachine = InetAddress.getLocalHost().getHostName();\r
 133                         thisPort = 0;\r
 134                 } else {\r
 135                         thisPort = dm.getPort();\r
 136                 }\r
 137                 this.removeSelf=removeSelf;\r
 138                 refresh();\r
 139         }\r
 140         \r
 141         @Override\r
 142         public boolean refresh() {\r
 143                 try {\r
 144                         dm.refresh();\r
 145                         //endpoints = dm.findEndpoints(service, version, envContext, routeOffer, true);\r
 146                         if(removeSelf) {\r
 147 //                              for(int i=0;i<endpoints.length;++i) {\r
 148 //                                      if(endpoints[i].getPort()==thisPort && endpoints[i].getHost().equals(thisMachine))\r
 149 //                                              endpoints[i]=null;\r
 150                                 }\r
 151                         //}\r
 152                         //return endpoints.length!=0;\r
 153                 } catch (Exception e) {\r
 154                         access.log(Level.ERROR, e.getMessage());\r
 155                 }\r
 156                 return false;\r
 157         }\r
 158 \r
 159         private String noEndpointsString() {\r
 160                 StringBuilder sb = new StringBuilder("No DME2 Endpoints found for ");\r
 161                 sb.append(service);\r
 162                 sb.append('/');\r
 163                 sb.append(version);\r
 164                 sb.append('/');\r
 165                 sb.append(envContext);\r
 166                 sb.append('/');\r
 167                 sb.append(routeOffer);\r
 168                 return sb.toString();\r
 169         }\r
 170 \r
 171         @Override\r
 172         public URI get(Locator.Item item) throws LocatorException {\r
 173                 if(!hasItems()) \r
 174                         throw new LocatorException(noEndpointsString());\r
 175                 if(item == null) \r
 176                         return null;\r
 177 \r
 178                 DME2Item li = ((DME2Item)item);\r
 179                 // if URI has been created, use it\r
 180                 if(li.uri!=null)return li.uri;\r
 181         \r
 182                 // URI not created, create it\r
 183 //              if(li.idx<endpoints.length) {\r
 184 //                      DME2Endpoint de = endpoints[li.idx];\r
 185 //                      if(de!=null) {\r
 186 //                              try {\r
 187 //                                      return li.uri=new URI(de.getProtocol().toLowerCase(),null,de.getHost(),de.getPort(),pathInfo,null,null);\r
 188 //                              } catch (URISyntaxException e) {\r
 189 //                                      throw new LocatorException(e);\r
 190 //                              }\r
 191 //                      }\r
 192 //              }\r
 193                 return null;\r
 194         }\r
 195         \r
 196         @Override\r
 197         public boolean hasItems() {\r
 198                 //return endpoints!=null && endpoints.length>0;\r
 199                 return true;\r
 200         }\r
 201 \r
 202         @Override\r
 203         public void invalidate(Locator.Item item) throws LocatorException {\r
 204                 if(item instanceof DME2Item) {\r
 205                         int idx = ((DME2Item)item).idx;\r
 206 //                      if(idx<endpoints.length) {\r
 207 //                              DME2Endpoint uhoh = endpoints[idx]; // Sometimes, DME2Endpoint, at least on File system, returns bogus entries.\r
 208 //                              endpoints[idx]=null;\r
 209 //                              boolean noneLeft=true;\r
 210 //                              for(int i=0;i<endpoints.length && noneLeft;++i) {\r
 211 //                                      noneLeft = endpoints[i]==null;\r
 212 //                              }\r
 213 //                              if(noneLeft && refresh()) { // make sure DME2 isn't giving us the same invalidated entry...\r
 214 //                                      for(int i=0;i<endpoints.length && noneLeft;++i) {\r
 215 //                                              DME2Endpoint ep = endpoints[i];\r
 216 //                                              if(ep != null && \r
 217 //                                                 ep.getHost().equals(uhoh.getHost()) &&\r
 218 //                                                 ep.getPort()==uhoh.getPort()) {\r
 219 //                                                       endpoints[i]=null;\r
 220 //                                              }\r
 221 //                                      }\r
 222 //                              }\r
 223 //                              \r
 224 //                      }\r
 225                 }\r
 226         }\r
 227 \r
 228         public class DME2Item implements Locator.Item {\r
 229                 private final int idx;\r
 230                 private URI uri;\r
 231                 private DME2Item(int i) {\r
 232                         idx = i;\r
 233                         uri = null;\r
 234                 }\r
 235         }\r
 236 \r
 237         @Override\r
 238         public DME2Item best() throws LocatorException {\r
 239                 if(!hasItems()) // checks endpoints\r
 240                         if(!refresh()) throw new LocatorException("No DME2 Endpoints Available");\r
 241                 \r
 242                 // Some endpoints in Array are null.  Need sub array of usable endpoints\r
 243                 //int usable[] = new int[endpoints.length];\r
 244                 int count=0;\r
 245 int[] usable = null;\r
 246                 //              for(int i=0;i<endpoints.length;++i) {\r
 247 //                      if(endpoints[i]!=null) {\r
 248 //                              usable[count++] = i;\r
 249 //                      }\r
 250 //              }\r
 251                 switch(count) {\r
 252                         case 0: refresh(); return null;\r
 253                         case 1: return new DME2Item(usable[0]);\r
 254                         default:\r
 255                                 int samemach[] = new int[count];\r
 256                                 int samecount = 0,closecount=0;\r
 257                                 // has to be sortable\r
 258                                 Integer closemach[] = new Integer[count];\r
 259                                 \r
 260                                 // Analyze for Same Machine or Remote machines\r
 261 //                              for(int i=0;i<count;++i) {\r
 262 //                                      DME2Endpoint ep = endpoints[usable[i]];\r
 263 //                                      String host = ep.getHost();\r
 264 //                                      if(thisMachine.equalsIgnoreCase(host)) {\r
 265 //                                              samemach[samecount++] = usable[i];\r
 266 //                                      } else {\r
 267 //                                              closemach[closecount++] = usable[i];\r
 268 //                                      }\r
 269 //                              }\r
 270                                 \r
 271                                 switch(samecount) {\r
 272                                         case 0: break;\r
 273                                         case 1: return new DME2Item(samemach[0]);\r
 274                                         default: // return randomized is multiple Endpoints on local machine.\r
 275                                                 int i = random.nextInt();\r
 276                                                 return new DME2Item(usable[Math.abs(i%samecount)]);\r
 277                                 }\r
 278                                 \r
 279                                 // Analyze for closest remote\r
 280                                 switch(closecount) {\r
 281                                         case 0: return null;\r
 282                                         case 1: return new DME2Item(closemach[0]);\r
 283                                         default: // return closest machine\r
 284                                                 DoubIndex remote[] = new DoubIndex[closecount];\r
 285                                                 int remotecount = 0;\r
 286                                                 for(int i=0;i<closecount;++i) {\r
 287                                                         //DME2Endpoint de = endpoints[usable[i]];\r
 288                                                 //      remote[remotecount++] = new DoubIndex(de.getDistance(),i);\r
 289                                                 }\r
 290                                                 Arrays.sort(remote,new Comparator<DoubIndex> () {\r
 291                                                         @Override\r
 292                                                         public int compare(DoubIndex a, DoubIndex b) {\r
 293                                                                 if(a.d<b.d) return -1;\r
 294                                                                 if(a.d>b.d) return 1;\r
 295                                                                 return (random.nextInt()%1)==0?1:0;// randomize if the same\r
 296                                                         }\r
 297                                                         \r
 298                                                 });\r
 299                                                 return new DME2Item(remote[0].idx);\r
 300                                 }\r
 301                 }\r
 302         }\r
 303         \r
 304         private static class DoubIndex {\r
 305                 public final double d;\r
 306                 public final int idx;\r
 307                 \r
 308                 public DoubIndex(double doub, int i) {\r
 309                         d = doub;\r
 310                         idx = i;\r
 311                 }\r
 312         }\r
 313         @Override\r
 314         public DME2Item first() {\r
 315 //              if(endpoints==null)return null;\r
 316 //              for(int i=0;i<endpoints.length;++i) {\r
 317 //                      if(endpoints[i]!=null)\r
 318 //                              return new DME2Item(i); \r
 319 //              }\r
 320                 return null;\r
 321         }\r
 322 \r
 323         @Override\r
 324         public DME2Item next(Locator.Item item) throws LocatorException {\r
 325                 //if(endpoints==null || endpoints.length==0 || !(item instanceof DME2Item))return null;\r
 326                 int idx = ((DME2Item)item).idx +1;\r
 327 //              for(int i=idx;i<endpoints.length;++i) {\r
 328 //                      if(endpoints[i]!=null)\r
 329 //                              return new DME2Item(i); \r
 330 //              }\r
 331 // This is a mistake..  will start infinite loops\r
 332 //              // Did not have any at end... try beginning\r
 333 //              for(int i=0;i<idx-1;++i) {\r
 334 //                      if(endpoints[i]!=null)\r
 335 //                              return new Item(i); \r
 336 //              }\r
 337 //              // If still nothing, refresh\r
 338 //              refresh();\r
 339                 return null;\r
 340         }\r
 341         \r
 342         @Override\r
 343         public void destroy() {\r
 344         }\r
 345 }\r