Update docker compose configuration for cassandra cluster

Author: pranav-patil

data-service/README.md

@@ -12,8 +12,8 @@ Data service provides various services to save and fetch data from [Apache Cassa
 * Go to `CASSANDRA_HOME\bin` directory and execute the command `cassandra.bat` to run cassandra.
 * Cassandra runs on default port 9042.
 * To enabled Authentication for Cassandra database, open `conf/cassandra.yaml` configuration file and update the below properties with these values. 
-    * **authenticator: org.apache.cassandra.auth.PasswordAuthenticator**
-    * **authorizer: org.apache.cassandra.auth.CassandraAuthorizer**
+    * **authenticator: PasswordAuthenticator**
+    * **authorizer: CassandraAuthorizer**
 
 All the above steps can be executed directly by running below runCassandra gradle task for windows.
 

data-service/build.gradle

@@ -55,7 +55,7 @@ dependencies {
     runtime('com.h2database:h2')
     testCompile('org.springframework.boot:spring-boot-starter-test')
     testCompile('io.projectreactor:reactor-test')
-    apt "org.mapstruct:mapstruct-processor:${mapstructVersion}"
+    annotationProcessor "org.mapstruct:mapstruct-processor:${mapstructVersion}"
 }
 
 dependencyManagement {

data-service/cassandra-config/cassandra-init.sh

@@ -1,10 +1,11 @@
 #!/bin/bash
 
-CQL="DROP keyspace testdb;
-CREATE KEYSPACE testdb WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'} AND durable_writes = true;
-ALTER USER cassandra WITH PASSWORD 'admin123';
-CREATE USER appuser WITH PASSWORD 'test123';
-GRANT ALL ON KEYSPACE testdb TO appuser;"
+CQL="DROP keyspace $CASSANDRA_APP_KEYSPACE;
+CREATE KEYSPACE $CASSANDRA_APP_KEYSPACE WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'} AND durable_writes = true;
+CREATE ROLE $CASSANDRA_APP_USERNAME WITH SUPERUSER = false AND LOGIN = true AND PASSWORD = '$CASSANDRA_APP_PASSWORD';
+GRANT ALL ON KEYSPACE $CASSANDRA_APP_KEYSPACE TO $CASSANDRA_APP_USERNAME;
+CREATE ROLE $CASSANDRA_ROOT_USERNAME WITH SUPERUSER = true AND LOGIN = true AND PASSWORD = '$CASSANDRA_ROOT_PASSWORD';
+ALTER ROLE cassandra WITH SUPERUSER = false AND LOGIN = false;
 
 until echo $CQL | cqlsh; do
   echo "cqlsh: Cassandra is unavailable to initialize - will retry later"