package io.pcp.parfait.benchmark;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
public class BlockedMetricCollector {
private final long initialBlockedCount;
private final long initialBlockedTime;
private final long threadId;
private long totalBlockedCount;
private long totalBlockedTime;
public BlockedMetricCollector(long threadId) {
this.threadId = threadId;
ThreadInfo initialThreadInfo = getThreadInfo(threadId);
initialBlockedCount = initialThreadInfo.getBlockedCount();
initialBlockedTime = initialThreadInfo.getBlockedTime();
}
public BlockedMetricCollector() {
this(Thread.currentThread().getId());
}
private ThreadInfo getThreadInfo(long threadId) {
return ManagementFactory.getThreadMXBean().getThreadInfo(threadId);
}
public void computeFinalValues() {
ThreadInfo finalThreadInfo = getThreadInfo(threadId);
long finalBlockedCount = finalThreadInfo.getBlockedCount();
long finalBlockedTime = finalThreadInfo.getBlockedTime();
totalBlockedCount = finalBlockedCount - initialBlockedCount;
totalBlockedTime = finalBlockedTime - initialBlockedTime;
}
public long getTotalBlockedCount() {
return totalBlockedCount;
}
public long getTotalBlockedTime() {
return totalBlockedTime;
}
}