Dropwizard Metrics reporter for Cassandra 2.1/2.0/1.2
This is a Cassandra reporter for the Codahale Dropwizard Metrics library (https://dropwizard.github.io/metrics). It uses the DataStax Java driver (https://github.com/datastax/java-driver) to write metrics to Cassandra.
Grab it from clojars.org
<repositories>
<repository>
<id>clojars.org</id>
<url>http://clojars.org/repo</url>
</repository>
</repositories>
...
<dependencies>
<dependency>
<groupId>org.clojars.brenden</groupId>
<artifactId>metrics-cassandra</artifactId>
<version>3.1.0</version>
</dependency>
</dependencies>Try it out
final Cassandra cassandra = new Cassandra(
Arrays.asList("cassandra.example.com"),
"metrics", /* keyspace */
"data", /* table */
31536000, /* TTL in seconds */
9042, /* native port */
"ONE"); /* consistency level */
final CassandraReporter reporter = CassandraReporter.forRegistry(registry)
.prefixedWith("metrics")
.convertRatesTo(TimeUnit.SECONDS)
.convertDurationsTo(TimeUnit.MILLISECONDS)
.filter(MetricFilter.ALL)
.build(cassandra);
reporter.start(1, TimeUnit.MINUTES);The code above will create 2 tables in the metrics keyspace: one called data, and one called data_names. The schema for these tables looks like this:
CREATE TABLE IF NOT EXISTS data (
name VARCHAR,
timestamp TIMESTAMP,
value DOUBLE,
PRIMARY KEY (name, timestamp)
);
CREATE TABLE IF NOT EXISTS data_names (
name VARCHAR,
last_updated TIMESTAMP,
PRIMARY KEY (name)
);