001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.log.render.markdown;
020
021import org.jpos.log.LogRenderer;
022import org.jpos.util.Profiler;
023
024import java.io.PrintStream;
025import java.util.Set;
026
027/** Markdown renderer for {@link Profiler} traces, emitted as a fenced code block. */
028public final class ProfilerMarkdownRenderer implements LogRenderer<Profiler> {
029    /** Default constructor. */
030    public ProfilerMarkdownRenderer() {
031    }
032
033    @Override
034    public void render(Profiler prof, PrintStream ps, String indent) {
035        var events = prof.getEvents();
036        int width = maxLength(events.keySet());
037        final String fmt = "| %-" + width + "s | %10.10s | %10.10s |%n";
038        ps.print (row(fmt, "Checkpoint", "Elapsed", "Total"));
039        ps.print(
040          row(fmt, "-".repeat(width), "---------:", "-------:")
041        );
042        StringBuilder graph = new StringBuilder();
043        events.forEach((key, v) -> {
044            ps.print(
045              row(fmt, v.getEventName(), toMillis(v.getDurationInNanos()), toMillis(v.getTotalDurationInNanos()))
046            );
047            graph.append ("  \"%s\" : %s%n".formatted(key, toMillis(v.getDurationInNanos())));
048        });
049        ps.println();
050        ps.println ("```mermaid");
051        ps.println ("pie title Profiler");
052        ps.println (graph);
053        ps.println ("```");
054
055    }
056    public Class<?> clazz() {
057        return Profiler.class;
058    }
059
060    public Type type() {
061        return Type.MARKDOWN;
062    }
063    private String row (String fmt, String c1, String c2, String c3) {
064        return fmt.formatted(c1, c2, c3);
065    }
066    
067    private String toMillis(long nanos) {
068        long millis = nanos / Profiler.TO_MILLIS;
069        long fractional = (nanos % Profiler.TO_MILLIS) / (Profiler.TO_MILLIS / 1000);
070        return String.format("%d.%03d", millis, fractional);
071    }
072    private int maxLength (Set<String> keys) {
073        return keys.stream()
074          .mapToInt(String::length)
075          .max()
076          .orElse(0); // R
077    }
078}