authz-cass/src/main/java/com/att/dao/CassAccess.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
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  22  ******************************************************************************/\r
  23 package com.att.dao;\r
  24 \r
  25 import java.io.IOException;\r
  26 import java.util.ArrayList;\r
  27 import java.util.List;\r
  28 \r
  29 import com.att.authz.env.AuthzEnv;\r
  30 import com.att.cadi.routing.GreatCircle;\r
  31 import com.att.inno.env.APIException;\r
  32 import com.att.inno.env.Env;\r
  33 import com.att.inno.env.util.Split;\r
  34 import com.datastax.driver.core.Cluster;\r
  35 import com.datastax.driver.core.Cluster.Builder;\r
  36 import com.datastax.driver.core.policies.DCAwareRoundRobinPolicy;\r
  37 \r
  38 public class CassAccess {\r
  39         public static final String KEYSPACE = "authz";\r
  40         public static final String CASSANDRA_CLUSTERS = "cassandra.clusters";\r
  41         public static final String CASSANDRA_CLUSTERS_PORT = "cassandra.clusters.port";\r
  42         public static final String CASSANDRA_CLUSTERS_USER_NAME = "cassandra.clusters.user";\r
  43         public static final String CASSANDRA_CLUSTERS_PASSWORD = "cassandra.clusters.password";\r
  44         public static final String CASSANDRA_RESET_EXCEPTIONS = "cassandra.reset.exceptions";\r
  45         public static final String LATITUDE = "LATITUDE";\r
  46         public static final String LONGITUDE = "LONGITUDE";\r
  47         private static final List<Resettable> resetExceptions = new ArrayList<Resettable>();\r
  48         public static final String ERR_ACCESS_MSG = "Accessing Backend";\r
  49         private static Builder cb = null;\r
  50 \r
  51         /**\r
  52          * To create DCAwareRoundRobing Policy:\r
  53          *       Need Properties\r
  54          *              LATITUDE (or AFT_LATITUDE)\r
  55          *              LONGITUDE (or AFT_LONGITUDE)\r
  56          *              CASSANDRA CLUSTERS with additional information:\r
  57          *                      machine:DC:lat:long,machine:DC:lat:long\r
  58          * @param env\r
  59          * @param prefix\r
  60          * @return\r
  61          * @throws APIException\r
  62          * @throws IOException\r
  63          */\r
  64 \r
  65         @SuppressWarnings("deprecation")\r
  66         public static synchronized Cluster cluster(Env env, String prefix) throws APIException, IOException {\r
  67                 if(cb == null) {\r
  68                         String pre;\r
  69                         if(prefix==null) {\r
  70                                 pre="";\r
  71                         } else {\r
  72                                 env.info().log("Cassandra Connection for ",prefix);\r
  73                                 pre = prefix+'.';\r
  74                         }\r
  75                         cb = Cluster.builder();\r
  76                         String str = env.getProperty(pre+CASSANDRA_CLUSTERS_PORT,"9042");\r
  77                         if(str!=null) {\r
  78                                 env.init().log("Cass Port = ",str );\r
  79                                 cb.withPort(Integer.parseInt(str));\r
  80                         }\r
  81                         str = env.getProperty(pre+CASSANDRA_CLUSTERS_USER_NAME,null);\r
  82                         if(str!=null) {\r
  83                                 env.init().log("Cass User = ",str );\r
  84                                 String epass = env.getProperty(pre + CASSANDRA_CLUSTERS_PASSWORD,null);\r
  85                                 if(epass==null) {\r
  86                                         throw new APIException("No Password configured for " + str);\r
  87                                 }\r
  88                                 //TODO Figure out way to ensure Decryptor setting in AuthzEnv\r
  89                                 if(env instanceof AuthzEnv) {\r
  90                                         cb.withCredentials(str,((AuthzEnv)env).decrypt(epass,true));\r
  91                                 } else {\r
  92                                         cb.withCredentials(str, env.decryptor().decrypt(epass));\r
  93                                 }\r
  94                         }\r
  95         \r
  96                         str = env.getProperty(pre+CASSANDRA_RESET_EXCEPTIONS,null);\r
  97                         if(str!=null) {\r
  98                                 env.init().log("Cass ResetExceptions = ",str );\r
  99                                 for(String ex : Split.split(',', str)) {\r
 100                                         resetExceptions.add(new Resettable(env,ex));\r
 101                                 }\r
 102                         }\r
 103         \r
 104                         str = env.getProperty(LATITUDE,env.getProperty("AFT_LATITUDE",null));\r
 105                         Double lat = str!=null?Double.parseDouble(str):null;\r
 106                         str = env.getProperty(LONGITUDE,env.getProperty("AFT_LONGITUDE",null));\r
 107                         Double lon = str!=null?Double.parseDouble(str):null;\r
 108                         if(lat == null || lon == null) {\r
 109                                 throw new APIException("LATITUDE(or AFT_LATITUDE) and/or LONGITUDE(or AFT_LATITUDE) are not set");\r
 110                         }\r
 111                         \r
 112                         env.init().printf("Service Latitude,Longitude = %f,%f",lat,lon);\r
 113                         \r
 114                         str = env.getProperty(pre+CASSANDRA_CLUSTERS,"localhost");\r
 115                         env.init().log("Cass Clusters = ",str );\r
 116                         String[] machs = Split.split(',', str);\r
 117                         String[] cpoints = new String[machs.length];\r
 118                         String bestDC = null;\r
 119                         int numInBestDC = 1;\r
 120                         double mlat, mlon,temp,distance = -1.0;\r
 121                         for(int i=0;i<machs.length;++i) {\r
 122                                 String[] minfo = Split.split(':',machs[i]);\r
 123                                 if(minfo.length>0) {\r
 124                                         cpoints[i]=minfo[0];\r
 125                                 }\r
 126                         \r
 127                                 // Calc closest DC with Great Circle\r
 128                                 if(minfo.length>3) {\r
 129                                         mlat = Double.parseDouble(minfo[2]);\r
 130                                         mlon = Double.parseDouble(minfo[3]);\r
 131                                         if((temp=GreatCircle.calc(lat, lon, mlat, mlon)) > distance) {\r
 132                                                 distance = temp;\r
 133                                                 if(bestDC!=null && bestDC.equals(minfo[1])) {\r
 134                                                         ++numInBestDC;\r
 135                                                 } else {\r
 136                                                         bestDC = minfo[1];\r
 137                                                         numInBestDC = 1;\r
 138                                                 }\r
 139                                         } else {\r
 140                                                 if(bestDC!=null && bestDC.equals(minfo[1])) {\r
 141                                                         ++numInBestDC;\r
 142                                                 }\r
 143                                         }\r
 144                                 }\r
 145                         }\r
 146                         \r
 147                         cb.addContactPoints(cpoints);\r
 148                         \r
 149                         if(bestDC!=null) {\r
 150                                 // 8/26/2016 Management has determined that Accuracy is preferred over speed in bad situations\r
 151                                 // Local DC Aware Load Balancing appears to have the highest normal performance, with the best\r
 152                                 // Degraded Accuracy\r
 153                                 cb.withLoadBalancingPolicy(new DCAwareRoundRobinPolicy(\r
 154                                                 bestDC, numInBestDC, true /*allow LocalDC to look at other DCs for LOCAL_QUORUM */));\r
 155                                 env.init().printf("Cassandra configured for DCAwareRoundRobinPolicy at %s with emergency remote of up to %d node(s)"\r
 156                                         ,bestDC, numInBestDC);\r
 157                         } else {\r
 158                                 env.init().printf("Cassandra is using Default Policy, which is not DC aware");\r
 159                         }\r
 160                 }\r
 161                 return cb.build();\r
 162         }\r
 163         \r
 164         private static class Resettable {\r
 165                 private Class<? extends Exception> cls;\r
 166                 private List<String> messages;\r
 167                 \r
 168                 @SuppressWarnings("unchecked")\r
 169                 public Resettable(Env env, String propData) throws APIException {\r
 170                         if(propData!=null && propData.length()>1) {\r
 171                                 String[] split = Split.split(':', propData);\r
 172                                 if(split.length>0) {\r
 173                                         try {\r
 174                                                 cls = (Class<? extends Exception>)Class.forName(split[0]);\r
 175                                         } catch (ClassNotFoundException e) {\r
 176                                                 throw new APIException("Declared Cassandra Reset Exception, " + propData + ", cannot be ClassLoaded");\r
 177                                         }\r
 178                                 }\r
 179                                 if(split.length>1) {\r
 180                                         messages=new ArrayList<String>();\r
 181                                         for(int i=1;i<split.length;++i) {\r
 182                                                 String str = split[i];\r
 183                                                 int start = str.startsWith("\"")?1:0;\r
 184                                                 int end = str.length()-(str.endsWith("\"")?1:0);\r
 185                                                 messages.add(split[i].substring(start, end));\r
 186                                         }\r
 187                                 } else {\r
 188                                         messages = null;\r
 189                                 }\r
 190                         }\r
 191                 }\r
 192                 \r
 193                 public boolean matches(Exception ex) {\r
 194                         if(ex.getClass().equals(cls)) {\r
 195                                 if(messages!=null) {\r
 196                                         String msg = ex.getMessage();\r
 197                                         for(String m : messages) {\r
 198                                                 if(msg.contains(m)) {\r
 199                                                         return true;\r
 200                                                 }\r
 201                                         }\r
 202                                 }\r
 203                         }\r
 204                         return false;\r
 205                 }\r
 206         }\r
 207         \r
 208         public static final boolean isResetException(Exception e) {\r
 209                 if(e==null) {\r
 210                         return true;\r
 211                 }\r
 212                 for(Resettable re : resetExceptions) {\r
 213                         if(re.matches(e)) {\r
 214                                 return true;\r
 215                         }\r
 216                 }\r
 217                 return false;\r
 218         }\r
 219 }\r