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// Copyright 2020 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.metricsproxy.service;
import ai.vespa.metricsproxy.metric.HealthMetric;
import java.util.logging.Level;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.util.logging.Logger;
/**
* Fetch health status for a given vespa service
*
* @author Jo Kristian Bergum
*/
public class RemoteHealthMetricFetcher extends HttpMetricFetcher {
private final static Logger log = Logger.getLogger(RemoteHealthMetricFetcher.class.getPackage().getName());
private final static String HEALTH_PATH = STATE_PATH + "health";
public RemoteHealthMetricFetcher(VespaService service, int port) {
super(service, port, HEALTH_PATH);
}
/**
* Connect to remote service over http and fetch metrics
*/
public HealthMetric getHealth(int fetchCount) {
String data = "{}";
try {
data = getJson();
} catch (IOException e) {
logMessageNoResponse(errMsgNoResponse(e), fetchCount);
}
return createHealthMetrics(data, fetchCount);
}
/**
* Connect to remote service over http and fetch metrics
*/
private HealthMetric createHealthMetrics(String data, int fetchCount) {
HealthMetric healthMetric = HealthMetric.getDown("Failed fetching status page for service");
try {
healthMetric = parse(data);
} catch (Exception e) {
handleException(e, data, fetchCount);
}
return healthMetric;
}
private HealthMetric parse(String data) {
if (data == null || data.isEmpty()) {
return HealthMetric.getUnknown("Empty response from status page");
}
try {
JSONObject o = new JSONObject(data);
JSONObject status = o.getJSONObject("status");
String code = status.getString("code");
String message = "";
if (status.has("message")) {
message = status.getString("message");
}
return HealthMetric.get(code, message);
} catch (JSONException e) {
log.log(LogLevel.DEBUG, "Failed to parse json response from metrics page:" + e + ":" + data);
return HealthMetric.getUnknown("Not able to parse json from status page");
}
}
}
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