Para was designed as a simple and modular back-end framework for object persistence and retrieval. It enables your application to store objects directly to a data store (NoSQL) or any relational database (RDBMS) and it also automatically indexes those objects and makes them searchable.
This plugin allows Para to store data in a Cassandra database.
The plugin is on Maven Central. Here's the Maven snippet to include in your pom.xml:
<dependency>
<groupId>com.erudika</groupId>
<artifactId>para-dao-cassandra</artifactId>
<version>{see_green_version_badge_above}</version>
</dependency>Alternatively you can download the JAR from the "Releases" tab above put it in a lib folder alongside the server
WAR file para-x.y.z.war. Para will look for plugins inside lib and pick up the Cassandra plugin.
Here are all the configuration properties for this plugin (these go inside your application.conf):
para.cassandra.hosts = "localhost,remotehost"
para.cassandra.port = 9042
para.cassandra.keyspace = "myapp"
para.cassandra.user = "user"
para.cassandra.password = "pass"
para.cassandra.replication_factor = 1
# SSL configuration
para.cassandra.ssl_enabled = false
para.cassandra.ssl_protocols = ""
para.cassandra.ssl_keystore = ""
para.cassandra.ssl_keystore_password = ""
para.cassandra.ssl_truststore = ""
para.cassandra.ssl_truststore_password = ""Finally, set the config property:
para.dao = "CassandraDAO"
This could be a Java system property or part of a application.conf file on the classpath.
This tells Para to use the Cassandra Data Access Object (DAO) implementation instead of the default.
BREAKING CHANGE: The schema has changed in v1.30.0 - column json_updates was added.
Execute the following statement before switching to the new version:
ALTER TABLE {app_identifier} ADD json_updates NVARCHAR;This is not required for tables created after v1.30.0.
Here's the schema for each table created by Para:
CREATE TABLE {app_identifier} (
id text PRIMARY KEY,
json text,
json_updates text
)- Cassandra Java Driver by DataStax
- Para Core