Examples with Nullable io.micrometer.core.lang.Nullable used on opensource projects

Example 1 with Nullable

use of io.micrometer.core.lang.Nullable in project micrometer by micrometer-metrics.

the class ExecutorServiceMetrics method unwrapThreadPoolExecutor.

/**
 * Every ScheduledThreadPoolExecutor created by {@link Executors} is wrapped. Also,
 * {@link Executors#newSingleThreadExecutor()} wrap a regular {@link ThreadPoolExecutor}.
 */
@Nullable
private ThreadPoolExecutor unwrapThreadPoolExecutor(ExecutorService executor, Class<?> wrapper) {
    try {
        Field e = wrapper.getDeclaredField("e");
        e.setAccessible(true);
        return (ThreadPoolExecutor) e.get(executorService);
    } catch (NoSuchFieldException | IllegalAccessException e) {
    // Do nothing. We simply can't get to the underlying ThreadPoolExecutor.
    }
    return null;
}

Example 2 with Nullable

use of io.micrometer.core.lang.Nullable in project micrometer by micrometer-metrics.

the class WavefrontMeterRegistry method writeMetricDirect.

private String writeMetricDirect(Meter.Id id, @Nullable String suffix, double value) {
    Meter.Id fullId = id;
    if (suffix != null)
        fullId = idWithSuffix(id, suffix);
    List<Tag> conventionTags = getConventionTags(fullId);
    String tags = conventionTags.stream().map(t -> "\"" + t.getKey() + "\": \"" + t.getValue() + "\"").collect(joining(","));
    UUID uuid = UUID.randomUUID();
    String uniqueNameSuffix = ((Long) uuid.getMostSignificantBits()).toString() + uuid.getLeastSignificantBits();
    // it as part of the name. Wavefront strips a $<NUMERIC> suffix from the name at parsing time.
    return "\"" + getConventionName(fullId) + "$" + uniqueNameSuffix + "\"" + ": {" + "\"value\": " + DoubleFormat.decimalOrNan(value) + "," + "\"tags\": {" + tags + "}" + "}";
}

Example 3 with Nullable

use of io.micrometer.core.lang.Nullable in project micrometer by micrometer-metrics.

the class GraphiteMeterRegistryTest method metricPrefixes.

@Test
void metricPrefixes() {
    final CountDownLatch bindLatch = new CountDownLatch(1);
    final CountDownLatch receiveLatch = new CountDownLatch(1);
    final CountDownLatch terminateLatch = new CountDownLatch(1);
    final GraphiteMeterRegistry registry = new GraphiteMeterRegistry(new GraphiteConfig() {

        @Override
        @Nullable
        public String get(String key) {
            return null;
        }

        @Override
        public Duration step() {
            return Duration.ofSeconds(1);
        }

        @Override
        public GraphiteProtocol protocol() {
            return GraphiteProtocol.UDP;
        }

        @Override
        public int port() {
            return 8127;
        }

        @Override
        public String[] tagsAsPrefix() {
            return new String[] { "application" };
        }
    }, mockClock);
    final Disposable.Swap server = Disposables.swap();
    Consumer<ClientOptions.Builder<?>> opts = builder -> builder.option(ChannelOption.SO_REUSEADDR, true).connectAddress(() -> new InetSocketAddress(PORT));
    UdpServer.create(opts).newHandler((in, out) -> {
        in.receive().asString().log().subscribe(line -> {
            assertThat(line).startsWith("APPNAME.myTimer");
            receiveLatch.countDown();
        });
        return Flux.never();
    }).doOnSuccess(v -> bindLatch.countDown()).doOnTerminate(terminateLatch::countDown).subscribe(server::replace);
    try {
        assertTrue(bindLatch.await(10, TimeUnit.SECONDS));
        registry.timer("my.timer", "application", "APPNAME");
        assertTrue(receiveLatch.await(10, TimeUnit.SECONDS));
    } catch (InterruptedException e) {
        fail("Failed to wait for line", e);
    } finally {
        server.dispose();
        registry.stop();
        try {
            terminateLatch.await(10, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            fail("Failed to terminate UDP server listening for Graphite metrics", e);
        }
    }
}

Example 4 with Nullable

use of io.micrometer.core.lang.Nullable in project micrometer by micrometer-metrics.

the class SampleRegistries method prometheus.

/**
 * To use pushgateway instead:
 * new PushGateway("localhost:9091").pushAdd(registry.getPrometheusRegistry(), "samples");
 *
 * @return A prometheus registry.
 */
public static PrometheusMeterRegistry prometheus() {
    PrometheusMeterRegistry prometheusRegistry = new PrometheusMeterRegistry(new PrometheusConfig() {

        @Override
        public Duration step() {
            return Duration.ofSeconds(10);
        }

        @Override
        @Nullable
        public String get(String k) {
            return null;
        }
    });
    try {
        HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0);
        server.createContext("/prometheus", httpExchange -> {
            String response = prometheusRegistry.scrape();
            httpExchange.sendResponseHeaders(200, response.length());
            OutputStream os = httpExchange.getResponseBody();
            os.write(response.getBytes());
            os.close();
        });
        new Thread(server::start).run();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    return prometheusRegistry;
}