Send custom metrics from your Java code

Deploy this integration to send custom metrics from your Java application to Logz.io, using Micrometer. The dedicated Logz.io Micrometer metrics registry sends custom metrics from your Java application to your Logz.io account.

Before you begin, you’ll need: Java 8 or higher

Send Custom metrics from your JAVA application to Logz.io

Usage

Via maven

<dependency>
    <groupId>io.logz.micrometer</groupId>
    <artifactId>micrometer-registry-logzio</artifactId>
    <version>1.0.2</version>
</dependency>

Via gradle groovy

implementation 'io.logz.micrometer:micrometer-registry-logzio:1.0.2'

Via gradle Kotlin

implementation("io.logz.micrometer:micrometer-registry-logzio:1.0.2")

Import in your package

import io.micrometer.logzio.LogzioConfig;
import io.micrometer.logzio.LogzioMeterRegistry;

Quick start

Replace the placeholders in the code (indicated by the double angle brackets << >>) to match your specifics.

Environment variable	Description	Required/Default
<<LISTENER-HOST>>	The full Logz.io Listener URL for for your region, configured to use port 8052 for http traffic, or port 8053 for https traffic (example: https://listener.logz.io:8053). For more details, see the regions page in logz.io docs	Required
<<PROMETHEUS-METRICS-SHIPPING-TOKEN>>	The Logz.io Prometheus Metrics account token. Find it under Settings > Manage accounts. Look up your Metrics account token.	Required
interval	The interval in seconds, to push metrics to Logz.io Note that your program will need to run for at least one interval for the metrics to be sent	Required

In your package

package your_package;
import io.micrometer.core.instrument.*;
import io.micrometer.core.instrument.Timer;
import io.micrometer.logzio.LogzioConfig;
import io.micrometer.logzio.LogzioMeterRegistry;

class MicrometerLogzio {

   public static void main(String[] args) {
       // initilize config
      LogzioConfig logzioConfig = new LogzioConfig() {
         @Override
         public String get(String key) {
            return null;
         }
         @Override
         public String uri() {
           return "https://<<LISTENER-HOST>>";
           // example:
           // return "https://listener.logz.io:8053"; 
         }
         
         @Override
         public String token() {
            return "<<PROMETHEUS-METRICS-SHIPPING-TOKEN>>";
         }

         @Override
         public Duration step() {
           return Duration.ofSeconds(<<interval>>);
           // example:
           // return Duration.ofSeconds(30);                    
         }
         @Override
         public Hashtable<String, String> includeLabels() {
             return new Hashtable<>();
         }
         @Override
         public Hashtable<String, String> excludeLabels() {
             return new Hashtable<>();
      };
      // Initialize registry
       LogzioMeterRegistry registry = new LogzioMeterRegistry(logzioConfig, Clock.SYSTEM);
       // Define tags (labels)
       ArrayList<Tag> tags = new ArrayList<>();
       tags.add(Tag.of("env","dev-micrometer"));

      // Create counter
      Counter counter = Counter
              .builder("counter_example")
              .description("a description of what this counter does") // optional
              .tags(tags) // optional
              .register(registry);
      // Increment your counter
      counter.increment(); 
      counter.increment(2); 
   }
}

Common tags

You can attach common tags to your registry that will be added to all metrics reported, for example:

// Initialize registry
LogzioMeterRegistry registry = new LogzioMeterRegistry(logzioConfig, Clock.SYSTEM);
// Define tags (labels)
registry.config().commonTags("key", "value");

Filter labels

You can the includeLabels or excludeLabels functions to filter your metrics by labels.

Include

Take for example this following usage, In your LogzioConfig() constructor:

@Override
public Hashtable<String, String> includeLabels() {
    Hashtable<String, String> includeLabels = new Hashtable<>();
    includeLabels.put("__name__", "my_counter_abc_total|my_second_counter_abc_total");
    includeLabels.put("k1", "v1");
    return includeLabels;
}

The registry will keep only metrics with the label __name__ matching the regex my_counter_abc_total|my_second_counter_abc_total, and with the label k1 matching the regex v1.

Exclude

In your LogzioConfig() constructor

@Override
public Hashtable<String, String> excludeLabels() {
    Hashtable<String, String> excludeLabels = new Hashtable<>();
    excludeLabels.put("__name__", "my_counter_abc_total|my_second_counter_abc_total");
    excludeLabels.put("k1", "v1");
    return excludeLabels;
}

The registry will drop all metrics with the label __name__ matching the regex my_counter_abc_total|my_second_counter_abc_total, and with the label k1 matching the regex v1.

Meter binders

Micrometer provides a set of binders for monitoring JVM metrics out of the box, for example:

// Initialize registry
LogzioMeterRegistry registry = new LogzioMeterRegistry(logzioConfig, Clock.SYSTEM);

// Gauges buffer and memory pool utilization
new JvmMemoryMetrics().bindTo(registry);
// Gauges max and live data size, promotion and allocation rates, and times GC pauses
new JvmGcMetrics().bindTo(registry);
// Gauges current CPU total and load average.
new ProcessorMetrics().bindTo(registry);
// Gauges thread peak, number of daemon threads, and live threads
new JvmThreadMetrics().bindTo(registry);
// Gauges loaded and unloaded classes
new ClassLoaderMetrics().bindTo(registry);

// File descriptor metrics gathered by the JVM
new FileDescriptorMetrics(tags).bindTo(registry);
// Gauges The uptime and start time of the Java virtual machine
new UptimeMetrics(tags).bindTo(registry);

// Counter of logging events
new LogbackMetrics().bindTo(registry);
new Log4j2Metrics().bindTo(registry);

For more information about other binders check out Micrometer-core Github repo.

Types of metrics

Refer to the Micrometer documentation for more details.

Name	Behavior
Counter	Metric value can only go up or be reset to 0, calculated per counter.increment(value); call.
Gauge	Metric value can arbitrarily increment or decrement, values can set automaticaly by tracking Collection size or set manually by gauge.set(value)
DistributionSummary	Metric values captured by the summary.record(value) function, the output is a distribution of count,sum and max for the recorded values during the push interval.
Timer	Mesures timing, metric values can be recorded by timer.record() call.

Counter

Counter counter = Counter
        .builder("counter_example")
        .description("a description of what this counter does") // optional
        .tags(tags) // optional
        .register(registry);
// Increment your counter
counter.increment(); 
counter.increment(2); 
// The following metric will be created and sent to Logz.io: counter_example_total{env="dev"} 3

Gauge

// Create Gauge
List<String> cache = new ArrayList<>(4);
// Track list size
Gauge gauge = Gauge
        .builder("cache_size_gauge_example", cache, List::size)
        .tags(tags)
        .register(registry);
cache.add("1");
// The following metric will be created and sent to Logz.io: cache_size_gauge_example{env="dev"} 1
        
// Track map size
Map<String, Integer> map_gauge = registry.gaugeMapSize("map_gauge_example", tags, new HashMap<>());
map_gauge.put("key",1);
// The following metric will be created and sent to Logz.io: map_gauge_example{env="dev"} 1
        
// set value manually
AtomicInteger manual_gauge = registry.gauge("manual_gauge_example", new AtomicInteger(0));
manual_gauge.set(83);
// The following metric will be created and sent to Logz.io:: manual_gauge_example{env="dev"} 83

DistributionSummary

// Create DistributionSummary
DistributionSummary summary = DistributionSummary
        .builder("summary_example")
        .description("a description of what this summary does") // optional
        .tags(tags) // optional
        .register(registry);
// Record values to distributionSummary
summary.record(10);
summary.record(20);
summary.record(30);
// // The following metrics will be created and sent to Logz.io: 
// summary_example_count{env="dev"} 3
// summary_example_max{env="dev"} 30
// summary_example_sum{env="dev"} 60

Timer

// Create Timer
Timer timer = Timer
        .builder("timer_example")
        .description("a description of what this timer does") // optional
        .tags(tags) // optional
        .register(registry);
// You can set a value manually
timer.record(1500,TimeUnit.MILLISECONDS);
// You can record the timing of a function
timer.record(()-> {
    try {
        Thread.sleep(1500);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
});
// The following metrics will be created and sent to Logz.io: 
// timer_example_duration_seconds_count{env="dev"} 2
// timer_example_duration_seconds_max{env="dev"} 1501
// timer_example_duration_seconds_sum{env="dev"} 3000

Run your application

Run your application to start sending metrics to Logz.io.

Check Logz.io for your metrics

Give your metrics some time to get from your system to ours, and then open Metrics dashboard.