BulkServiceStatistics.java

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package org.dcache.services.bulk.util;

import static org.dcache.services.bulk.util.BulkRequestTarget.State.CANCELLED;
import static org.dcache.services.bulk.util.BulkRequestTarget.State.COMPLETED;
import static org.dcache.services.bulk.util.BulkRequestTarget.State.FAILED;
import static org.dcache.services.bulk.util.BulkRequestTarget.State.RUNNING;
import static org.dcache.services.bulk.util.BulkRequestTarget.State.SKIPPED;

import dmg.cells.nucleus.CellInfoProvider;
import java.io.PrintWriter;
import java.time.Duration;
import java.time.Instant;
import java.util.Date;
import java.util.Map;
import java.util.TreeMap;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

/**
 * Provides activity statistics via the CellInfo interface.
 */
public final class BulkServiceStatistics implements CellInfoProvider {

    private static final String LAST_START = "Running since: %s";
    private static final String UP_TIME = "Uptime %s days, %s hours, %s minutes, %s seconds";
    private static final String LAST_SWEEP = "Last job sweep at %s";
    private static final String LAST_SWEEP_DURATION = "Last job sweep took %s seconds";
    private static final String STATS_FORMAT = "%-20s :    %10s";

    private final Date started = new Date();

    private final AtomicInteger activeRequests = new AtomicInteger(0);
    private final AtomicLong requestsCompleted = new AtomicLong(0L);
    private final AtomicLong requestsCancelled = new AtomicLong(0L);
    private final Map<String, AtomicLong> requestTypes = new TreeMap<>();
    private final Map<String, AtomicLong> userRequests = new TreeMap<>();
    private final Map<String, AtomicLong> counts
          = Map.of(CANCELLED.name(), new AtomicLong(0L),
          COMPLETED.name(), new AtomicLong(0L),
          FAILED.name(), new AtomicLong(0L),
          SKIPPED.name(), new AtomicLong(0L));

    private long lastSweep = started.getTime();
    private long lastSweepDuration = 0;

    public void addUserRequest(String user) {
        AtomicLong counter = userRequests.get(user);
        if (counter == null) {
            counter = new AtomicLong(0);
            userRequests.put(user, counter);
        }
        counter.incrementAndGet();
    }

    @Override
    public void getInfo(PrintWriter pw) {
        Duration duration = Duration.between(started.toInstant(), Instant.now());

        pw.println(String.format(LAST_START, started));
        pw.println(String.format(UP_TIME,
              duration.toDays(),
              duration.toHours() % 24,
              duration.toMinutes() % 60,
              duration.toSeconds() % 60));
        pw.println();

        pw.println(String.format(LAST_SWEEP, new Date(lastSweep)));
        pw.println(String.format(LAST_SWEEP_DURATION,
              TimeUnit.MILLISECONDS.toSeconds(lastSweepDuration)));
        pw.println();

        pw.println("------------------ TARGETS BY STATE ------------------");
        pw.println("         (cumulative from last service start)");
        counts.entrySet().stream().filter(e->!e.getKey().equals(RUNNING.name()))
              .forEach(e -> pw.println(String.format(STATS_FORMAT, e.getKey(), e.getValue().get())));
        pw.println();

        long received = requestTypes.values().stream().mapToLong(AtomicLong::get).sum();

        pw.println("------------ REQUEST TOTALS (since start) ------------");
        pw.println(String.format(STATS_FORMAT, "Requests received", received));
        pw.println(String.format(STATS_FORMAT, "Requests completed", requestsCompleted.get()));
        pw.println(String.format(STATS_FORMAT, "Requests cancelled", requestsCancelled.get()));
        pw.println();

        pw.println("--------------- REQUESTS (since start) ---------------");
        requestTypes.entrySet().stream()
              .forEach(entry ->
                    pw.println(
                          String.format(STATS_FORMAT, entry.getKey(), entry.getValue().get())));
        pw.println();

        pw.println("---------------- REQUESTS  (current) -----------------");
        pw.println(String.format(STATS_FORMAT, "Active", activeRequests.get()));
        pw.println();
    }

    public String getOwnerCounts() {
        StringBuilder builder = new StringBuilder();
        builder.append("----------------- USERS (since start) ----------------\n");
        userRequests.entrySet().stream()
              .forEach(entry ->
                    builder.append(
                                String.format(STATS_FORMAT, entry.getKey(), entry.getValue().get()))
                          .append("\n"));
        builder.append("\n");
        return builder.toString();
    }

    public void incrementRequestsCancelled() {
        requestsCancelled.incrementAndGet();
    }

    public void incrementRequestsCompleted() {
        requestsCompleted.incrementAndGet();
    }

    public void increment(String targetState) {
        AtomicLong counter = counts.get(targetState);
        if (counter != null) {
            counter.incrementAndGet();
        }
    }

    public void decrement(String targetState) {
        AtomicLong counter = counts.get(targetState);
        if (counter != null) {
            counter.decrementAndGet();
        }
    }

    public void incrementRequestsReceived(String activity) {
        requestTypes.computeIfAbsent(activity, v -> new AtomicLong(0)).incrementAndGet();
    }

    public void setActive(int count) {
        activeRequests.set(count);
    }

    public void sweepFinished(long duration) {
        lastSweep = System.currentTimeMillis();
        lastSweepDuration = duration;
    }
}