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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.server.jetty;
import com.yahoo.jdisc.Metric;
import com.yahoo.jdisc.Metric.Context;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* Responsible for metric reporting for JDisc http request handler support.
* @author Tony Vaagenes
*/
class RequestMetricReporter {
private final Metric metric;
private final Context context;
private final long requestStartTime;
//TODO: rename
private final AtomicBoolean firstSetOfTimeToFirstByte = new AtomicBoolean(true);
RequestMetricReporter(Metric metric, Context context, long requestStartTime) {
this.metric = metric;
this.context = context;
this.requestStartTime = requestStartTime;
}
void successfulWrite(int numBytes) {
setTimeToFirstByteFirstTime();
metric.add(MetricDefinitions.NUM_SUCCESSFUL_WRITES, 1, context);
metric.set(MetricDefinitions.NUM_BYTES_SENT, numBytes, context);
}
private void setTimeToFirstByteFirstTime() {
boolean isFirstWrite = firstSetOfTimeToFirstByte.getAndSet(false);
if (isFirstWrite) {
long timeToFirstByte = getRequestLatency();
metric.set(MetricDefinitions.TIME_TO_FIRST_BYTE, timeToFirstByte, context);
}
}
void failedWrite() {
metric.add(MetricDefinitions.NUM_FAILED_WRITES, 1, context);
}
void successfulResponse() {
setTimeToFirstByteFirstTime();
long requestLatency = getRequestLatency();
metric.set(MetricDefinitions.TOTAL_SUCCESSFUL_LATENCY, requestLatency, context);
metric.add(MetricDefinitions.NUM_SUCCESSFUL_RESPONSES, 1, context);
}
void failedResponse() {
setTimeToFirstByteFirstTime();
metric.set(MetricDefinitions.TOTAL_FAILED_LATENCY, getRequestLatency(), context);
metric.add(MetricDefinitions.NUM_FAILED_RESPONSES, 1, context);
}
void prematurelyClosed() {
metric.add(MetricDefinitions.NUM_PREMATURELY_CLOSED_CONNECTIONS, 1, context);
}
void successfulRead(int bytes_received) {
metric.set(MetricDefinitions.NUM_BYTES_RECEIVED, bytes_received, context);
}
private long getRequestLatency() {
return System.currentTimeMillis() - requestStartTime;
}
void uriLength(int length) {
metric.set(MetricDefinitions.URI_LENGTH, length, context);
}
void contentSize(int size) {
metric.set(MetricDefinitions.CONTENT_SIZE, size, context);
}
}
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