JVMMetricsProvider.java

public class JVMMetric implements Metric {

	@Override
	public String name() {
		return "[JVM-Metric]";
	}

	@Override
	public String display() {
		StringBuffer sb = new StringBuffer(4);
		
		sb.append("Metric: " + name() + "\n");
		sb.append("Current time: " + System.currentTimeMillis() + "\n");
		sb.append("Max memory: " +  Runtime.getRuntime().maxMemory() + "\n");
		sb.append(
			"Available processors: " +  
				Runtime.getRuntime().availableProcessors() + "\n");

		return sb.toString();
	}
}

public class JVMMetricsProvider implements MetricsProvider {

	@Override
	public Metric collect() {
		return new JVMMetric();
	}

	@Override
	public Map<String, Object> getMetricProperties() {
		return new HashMap<String, Object>();
	}

	@Override
	public Long getId() {
		return 1L;
	}

}