/*
* Copyright 2017 NAVER Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.navercorp.pinpoint.profiler.context.compress;
import com.navercorp.pinpoint.profiler.context.SpanEvent;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**
* @author Woonduk Kang(emeroad)
*/
public class SpanEventCompressorV2 implements SpanEventCompressor<Long> {
private final static Comparator<SpanEvent> SEQUENCE_COMPARATOR = SpanEventSequenceComparator.INSTANCE;
@Override
public void compress(List<SpanEvent> spanEventList, final Long keyTime) {
// sort list for data compression
Collections.sort(spanEventList, SEQUENCE_COMPARATOR);
compressTime(spanEventList, keyTime);
compressDepth(spanEventList);
}
private void compressTime(List<SpanEvent> spanEventList, Long keyTime) {
long prevKeyTime = keyTime;
final int size = spanEventList.size();
for (int i = 0; i < size; i++) {
final SpanEvent spanEvent = spanEventList.get(i);
final long startTime = spanEvent.getStartTime();
final long startElapsedTime = startTime - prevKeyTime;
spanEvent.setStartElapsed((int) startElapsedTime);
final long endElapsedTime = spanEvent.getAfterTime() - startTime;
if (endElapsedTime != 0) {
spanEvent.setEndElapsed((int) endElapsedTime);
}
// save next KeyFrame;
prevKeyTime = startTime;
}
}
/**
* Skip depth to Span or SpanChunk scope
* @param spanEventList
*/
private void compressDepth(List<SpanEvent> spanEventList) {
boolean first = true;
int prevDepth = 0;
final int size = spanEventList.size();
for (int i = 0; i < size; i++) {
final SpanEvent spanEvent = spanEventList.get(i);
if (first) {
first = false;
prevDepth = spanEvent.getDepth();
} else {
final int currentDepth = spanEvent.getDepth();
if (currentDepth == prevDepth) {
// skip
spanEvent.unsetDepth();
}
prevDepth = currentDepth;
}
}
}
}