org.cloudfoundry.promregator.rewrite.CFAllLabelsMetricFamilySamplesEnricher Maven / Gradle / Ivy

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Prometheus/CloudFoundry Metrics Aggregator

There is a newer version: 1.1.3

package org.cloudfoundry.promregator.rewrite;

import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

/**
 * A MetricFamilySamplesEnricher which enriches the labels of metrics by 
 * - org_name
 * - space_name
 * - app_name
 * - cf_instance_id
 * 
 */
public class CFAllLabelsMetricFamilySamplesEnricher extends AbstractMetricFamilySamplesEnricher {
	public static final String LABELNAME_ORGNAME = "org_name";
	public static final String LABELNAME_SPACENAME = "space_name";
	public static final String LABELNAME_APPNAME = "app_name";
	public static final String LABELNAME_INSTANCEID = "cf_instance_id";
	
	/* still required for backward-compatibility
	 * Note that LABELNAME_INSTANCE is the better approach
	 */
	public static final String LABELNAME_INSTANCE_NUMBER = "cf_instance_number";
	
	private static String[] labelNames = new String[] { LABELNAME_ORGNAME, LABELNAME_SPACENAME, LABELNAME_APPNAME, LABELNAME_INSTANCEID, LABELNAME_INSTANCE_NUMBER };
	
	public static String[] getEnrichingLabelNames() {
		return labelNames.clone();
	}
	
	private String orgName;
	private String spaceName;
	private String appName;
	private String instanceId;

	public CFAllLabelsMetricFamilySamplesEnricher(String orgName, String spaceName, String appName, String instanceId) {
		this.instanceId = instanceId;
		this.spaceName = spaceName;
		this.appName = appName;
		this.orgName = orgName;
	}
	
	@Override
	protected List getEnrichedLabelNames(List original) {
		List clone = new LinkedList<>(original);
		Collections.addAll(clone, labelNames);
		
		return clone;
	}
	
	@Override
	public List getEnrichedLabelValues(List original) {
		List clone = new LinkedList<>(original);
		
		clone.add(this.orgName);
		clone.add(this.spaceName);
		clone.add(this.appName);
		clone.add(this.instanceId);
		clone.add(getInstanceFromInstanceId(this.instanceId));
		
		return clone;
	}
	
	private static String getInstanceFromInstanceId(String instanceId) {
		if (instanceId == null)
			return null;
		
		int pos = instanceId.lastIndexOf(':');
		if (pos == -1)
			return null; // invalid format
		
		return instanceId.substring(pos+1);
	}
}