auth/auth-cass/src/main/java/org/onap/aaf/auth/dao/CassAccess.java

   1 /**
   2  * ============LICENSE_START====================================================
   3  * org.onap.aaf
   4  * ===========================================================================
   5  * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
   6  * ===========================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END====================================================
  19  *
  20  */
  21
  22 package org.onap.aaf.auth.dao;
  23
  24 import java.io.IOException;
  25 import java.util.ArrayList;
  26 import java.util.List;
  27
  28 import org.onap.aaf.auth.env.AuthzEnv;
  29 import org.onap.aaf.cadi.config.Config;
  30 import org.onap.aaf.cadi.routing.GreatCircle;
  31 import org.onap.aaf.misc.env.APIException;
  32 import org.onap.aaf.misc.env.Env;
  33 import org.onap.aaf.misc.env.util.Split;
  34
  35 import com.datastax.driver.core.Cluster;
  36 import com.datastax.driver.core.Cluster.Builder;
  37 import com.datastax.driver.core.policies.DCAwareRoundRobinPolicy;
  38 import com.datastax.driver.core.policies.TokenAwarePolicy;
  39
  40 public class CassAccess {
  41         public static final String KEYSPACE = "authz";
  42         public static final String CASSANDRA_CLUSTERS = "cassandra.clusters";
  43         public static final String CASSANDRA_CLUSTERS_PORT = "cassandra.clusters.port";
  44         public static final String CASSANDRA_CLUSTERS_USER_NAME = "cassandra.clusters.user";
  45         public static final String CASSANDRA_CLUSTERS_PASSWORD = "cassandra.clusters.password";
  46         public static final String CASSANDRA_RESET_EXCEPTIONS = "cassandra.reset.exceptions";
  47         private static final List<Resettable> resetExceptions = new ArrayList<>();
  48         public static final String ERR_ACCESS_MSG = "Accessing Backend";
  49         private static Builder cb = null;
  50
  51         /**
  52          * To create DCAwareRoundRobing Policy:
  53          *       Need Properties
  54          *              LATITUDE (or AFT_LATITUDE)
  55          *              LONGITUDE (or AFT_LONGITUDE)
  56          *              CASSANDRA CLUSTERS with additional information:
  57          *                      machine:DC:lat:long,machine:DC:lat:long
  58          * @param env
  59          * @param prefix
  60          * @return
  61          * @throws APIException
  62          * @throws IOException
  63          */
  64
  65 //      @SuppressWarnings("deprecation")
  66         public static synchronized Cluster cluster(Env env, String prefix) throws APIException, IOException {
  67                 if(cb == null) {
  68                         String pre;
  69                         if(prefix==null) {
  70                                 pre="";
  71                         } else {
  72                                 env.info().log("Cassandra Connection for ",prefix);
  73                                 pre = prefix+'.';
  74                         }
  75                         cb = Cluster.builder();
  76                         String str = env.getProperty(pre+CASSANDRA_CLUSTERS_PORT,env.getProperty(CASSANDRA_CLUSTERS_PORT,"9042"));
  77                         if(str!=null) {
  78                                 env.init().log("Cass Port = ",str );
  79                                 cb.withPort(Integer.parseInt(str));
  80                         }
  81                         str = env.getProperty(pre+CASSANDRA_CLUSTERS_USER_NAME,env.getProperty(CASSANDRA_CLUSTERS_USER_NAME,null));
  82                         if(str!=null) {
  83                                 env.init().log("Cass User = ",str );
  84                                 String epass = env.getProperty(pre + CASSANDRA_CLUSTERS_PASSWORD,env.getProperty(CASSANDRA_CLUSTERS_PASSWORD,null));
  85                                 if(epass==null) {
  86                                         throw new APIException("No Password configured for " + str);
  87                                 }
  88                                 //TODO Figure out way to ensure Decryptor setting in AuthzEnv
  89                                 if(env instanceof AuthzEnv) {
  90                                         cb.withCredentials(str,((AuthzEnv)env).decrypt(epass,true));
  91                                 } else {
  92                                         cb.withCredentials(str, env.decryptor().decrypt(epass));
  93                                 }
  94                         }
  95
  96                         str = env.getProperty(pre+CASSANDRA_RESET_EXCEPTIONS,env.getProperty(CASSANDRA_RESET_EXCEPTIONS,null));
  97                         if(str!=null) {
  98                                 env.init().log("Cass ResetExceptions = ",str );
  99                                 for(String ex : Split.split(',', str)) {
 100                                         resetExceptions.add(new Resettable(env,ex));
 101                                 }
 102                         }
 103
 104                         str = env.getProperty(Config.CADI_LATITUDE);
 105                         Double lat = str!=null?Double.parseDouble(str):null;
 106                         str = env.getProperty(Config.CADI_LONGITUDE);
 107                         Double lon = str!=null?Double.parseDouble(str):null;
 108                         if(lat == null || lon == null) {
 109                                 throw new APIException(Config.CADI_LATITUDE + " and/or " + Config.CADI_LONGITUDE + " are not set");
 110                         }
 111
 112                         env.init().printf("Service Latitude,Longitude = %f,%f",lat,lon);
 113
 114                         str = env.getProperty(pre+CASSANDRA_CLUSTERS,env.getProperty(CASSANDRA_CLUSTERS,"localhost"));
 115                         env.init().log("Cass Clusters = ",str );
 116                         String[] machs = Split.split(',', str);
 117                         String[] cpoints = new String[machs.length];
 118                         String bestDC = null;
 119                         int numInBestDC = 1;
 120                         double mlat, mlon,temp,distance = Double.MAX_VALUE;
 121                         for(int i=0;i<machs.length;++i) {
 122                                 String[] minfo = Split.split(':',machs[i]);
 123                                 if(minfo.length>0) {
 124                                         cpoints[i]=minfo[0];
 125                                 }
 126
 127                                 if(minfo.length>3) {
 128                                         if(minfo[1].equals(bestDC)) {
 129                                                 ++numInBestDC;
 130                                         } else {
 131                                                 // Calc closest DC with Great Circle
 132                                                 mlat = Double.parseDouble(minfo[2]);
 133                                                 mlon = Double.parseDouble(minfo[3]);
 134                                                 // Note: GreatCircle Distance is always >= 0.0 (not negative)
 135                                                 if((temp=GreatCircle.calc(lat, lon, mlat, mlon)) < distance) {
 136                                                         distance = temp;
 137                                                         if(bestDC==null || !bestDC.equals(minfo[1])) {
 138                                                                 bestDC = minfo[1];
 139                                                                 numInBestDC = 1;
 140                                                         }
 141                                                 }
 142                                         }
 143                                 }
 144                         }
 145
 146                         cb.addContactPoints(cpoints);
 147
 148                         if(bestDC!=null) {
 149                                 // 8/26/2016 Management has determined that Accuracy is preferred over speed in bad situations
 150                                 // Local DC Aware Load Balancing appears to have the highest normal performance, with the best
 151                                 // Degraded Accuracy
 152                                 DCAwareRoundRobinPolicy dcrrPolicy = DCAwareRoundRobinPolicy.builder()
 153                                         .withLocalDc(bestDC)
 154                                         .withUsedHostsPerRemoteDc(numInBestDC)
 155                                         .build();
 156 //                              cb.withLoadBalancingPolicy(new DCAwareRoundRobinPolicy(
 157 //                                              bestDC, numInBestDC, true /*allow LocalDC to look at other DCs for LOCAL_QUORUM */));
 158                                 cb.withLoadBalancingPolicy(new TokenAwarePolicy(dcrrPolicy));
 159                                 env.init().printf("Cassandra configured for DCAwareRoundRobinPolicy with best DC at %s with emergency remote of up to %d node(s)"
 160                                         ,bestDC, numInBestDC);
 161                         } else {
 162                                 env.init().printf("Cassandra is using Default Policy, which is not DC aware");
 163                         }
 164                 }
 165                 return cb.build();
 166         }
 167
 168         private static class Resettable {
 169                 private Class<? extends Exception> cls;
 170                 private List<String> messages;
 171
 172                 @SuppressWarnings("unchecked")
 173                 public Resettable(Env env, String propData) throws APIException {
 174                         if(propData!=null && propData.length()>1) {
 175                                 String[] split = Split.split(':', propData);
 176                                 if(split.length>0) {
 177                                         try {
 178                                                 cls = (Class<? extends Exception>)Class.forName(split[0]);
 179                                         } catch (ClassNotFoundException e) {
 180                                                 throw new APIException("Declared Cassandra Reset Exception, " + propData + ", cannot be ClassLoaded");
 181                                         }
 182                                 }
 183                                 if(split.length>1) {
 184                                         messages=new ArrayList<>();
 185                                         for(int i=1;i<split.length;++i) {
 186                                                 String str = split[i];
 187                                                 int start = str.startsWith("\"")?1:0;
 188                                                 int end = str.length()-(str.endsWith("\"")?1:0);
 189                                                 messages.add(split[i].substring(start, end));
 190                                         }
 191                                 } else {
 192                                         messages = null;
 193                                 }
 194                         }
 195                 }
 196
 197                 public boolean matches(Exception ex) {
 198                         if(ex.getClass().equals(cls)) {
 199                                 if(messages!=null) {
 200                                         String msg = ex.getMessage();
 201                                         for(String m : messages) {
 202                                                 if(msg.contains(m)) {
 203                                                         return true;
 204                                                 }
 205                                         }
 206                                 }
 207                         }
 208                         return false;
 209                 }
 210         }
 211
 212         public static final boolean isResetException(Exception e) {
 213                 if(e==null) {
 214                         return true;
 215                 }
 216                 for(Resettable re : resetExceptions) {
 217                         if(re.matches(e)) {
 218                                 return true;
 219                         }
 220                 }
 221                 return false;
 222         }
 223 }