io.prometheus.client.examples.guice

Class Main

java.lang.Object

io.prometheus.client.examples.guice.Main

public class Main
extends Object

This Maven module demonstrates Prometheus integration with Google's Guice framework as well as more advanced use of prepopulated Metric.Builder and Metric.Partial constructs.

In this case, we demonstrate optional provisioning of Metric through Guice Provider in Module. What is interesting to note is that we have a fictional HTTP server with two HTTP Servlet handlers that share the same two fundamental metrics defined in Module.HandlerCounterProvider and Module.HandlerLatencyProvider. These two metrics track a typical use case of measuring request counts and latency quantiles. The metrics share the same schema and metric name, but the handlers can be differentiated by label values .

This example is unremarkable in the sense that manual passing of partially-fabricated metrics is possible to do by hand as well, and it is easy. In the interests of minimizing static state and promoting testability, teams may decide to use dependency injection for provisioning of metrics that are shared between multiple classes, though this is discouraged since except for a few rare cases it demonstrates violation of law of demeter and separation of concerns .

Author:

matt.proud@gmail.com (Matt T. Proud)

Constructor Summary

Constructors

Constructor and Description
Main(Server server)

Method Summary

Methods

Modifier and Type	Method and Description
static void	main(String[] arguments)
void	run()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Main

@Inject
public Main(Server server)

Method Detail

run

public void run()

main

public static void main(String[] arguments)