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package me.lucko.spark.profiler;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Function for grouping threads together
*/
@FunctionalInterface
public interface ThreadGrouper {
/**
* Gets the group for the given thread.
*
* @param threadName the name of the thread
* @return the group
*/
String getGroup(String threadName);
/**
* Implementation of {@link ThreadGrouper} that just groups by thread name.
*/
ThreadGrouper BY_NAME = new ByName();
final class ByName implements ThreadGrouper {
@Override
public String getGroup(String threadName) {
return threadName;
}
}
/**
* Implementation of {@link ThreadGrouper} that attempts to group by the name of the pool
* the thread originated from.
*/
ThreadGrouper BY_POOL = new ByPool();
final class ByPool implements ThreadGrouper {
private static final Pattern THREAD_POOL_PATTERN = Pattern.compile("^(.*)[-#] ?\\d+$");
@Override
public String getGroup(String threadName) {
Matcher matcher = THREAD_POOL_PATTERN.matcher(threadName);
if (!matcher.matches()) {
return threadName;
}
return matcher.group(1).trim() + " (Combined)";
}
}
}
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