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package org.javacs;
import com.sun.source.util.*;
import java.net.URI;
import java.time.Duration;
import java.time.Instant;
import java.util.*;
import java.util.logging.Logger;
class Profiler implements TaskListener {
Set<URI> files = new HashSet<>();
Map<URI, Map<TaskEvent.Kind, Instant>> started = new HashMap<>();
Map<TaskEvent.Kind, Duration> profile = new EnumMap<>(TaskEvent.Kind.class);
@Override
public void started(TaskEvent e) {
var uri = e.getSourceFile().toUri();
var kind = e.getKind();
var fileStarted = started.computeIfAbsent(uri, __ -> new EnumMap<>(TaskEvent.Kind.class));
fileStarted.put(kind, Instant.now());
files.add(uri);
// TODO show the user a warning when we're compiling a lot of files that aren't in the classpath
}
@Override
public void finished(TaskEvent e) {
var uri = e.getSourceFile().toUri();
var kind = e.getKind();
var fileStarted = started.computeIfAbsent(uri, __ -> new HashMap<>());
var start = fileStarted.getOrDefault(kind, Instant.now());
var elapsed = Duration.between(start, Instant.now());
var soFar = profile.getOrDefault(kind, Duration.ZERO);
var total = soFar.plus(elapsed);
profile.put(kind, total);
}
void print() {
var lines = new StringJoiner("; ");
for (var kind : TaskEvent.Kind.values()) {
if (!profile.containsKey(kind)) continue;
var elapsed = profile.get(kind);
var s = elapsed.getSeconds() + elapsed.getNano() / 1000.0 / 1000.0 / 1000.0;
lines.add(String.format("%s: %.3fs", kind, s));
}
// TODO log names if n is small
LOG.info(String.format("Compiled %d files: %s", files.size(), lines));
}
private static final Logger LOG = Logger.getLogger("main");
}
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