Examples with PrometheusBasedResourceLimitChecks org.eclipse.hono.adapter.resourcelimits.PrometheusBasedResourceLimitChecks used on opensource projects

Example 1 with PrometheusBasedResourceLimitChecks

use of org.eclipse.hono.adapter.resourcelimits.PrometheusBasedResourceLimitChecks in project hono by eclipse.

the class AbstractProtocolAdapterApplication method prometheusResourceLimitChecks.

/**
 * Creates resource limit checks based on data retrieved from a Prometheus server
 * via its HTTP API.
 *
 * @param config The configuration properties.
 * @param tenantClient The client to use for retrieving tenant configuration data.
 * @throws NullPointerException if any of the parameters are {@code null}-
 * @return The checks.
 */
protected ResourceLimitChecks prometheusResourceLimitChecks(final PrometheusBasedResourceLimitChecksConfig config, final TenantClient tenantClient) {
    Objects.requireNonNull(config);
    Objects.requireNonNull(tenantClient);
    if (config.isHostConfigured()) {
        final WebClientOptions webClientOptions = new WebClientOptions();
        webClientOptions.setConnectTimeout(config.getConnectTimeout());
        webClientOptions.setDefaultHost(config.getHost());
        webClientOptions.setDefaultPort(config.getPort());
        webClientOptions.setTrustOptions(config.getTrustOptions());
        webClientOptions.setKeyCertOptions(config.getKeyCertOptions());
        webClientOptions.setSsl(config.isTlsEnabled());
        final var webClient = WebClient.create(vertx, webClientOptions);
        final var cacheTimeout = Duration.ofSeconds(config.getCacheTimeout());
        final Caffeine<Object, Object> builder = Caffeine.newBuilder().executor(Executors.newSingleThreadExecutor(r -> {
            final var t = new Thread(r);
            t.setDaemon(true);
            return t;
        })).initialCapacity(config.getCacheMinSize()).maximumSize(config.getCacheMaxSize()).expireAfterWrite(cacheTimeout).refreshAfterWrite(cacheTimeout.dividedBy(2));
        return new PrometheusBasedResourceLimitChecks(builder.buildAsync(new ConnectedDevicesAsyncCacheLoader(webClient, config, tracer)), builder.buildAsync(new ConnectionDurationAsyncCacheLoader(webClient, config, tracer)), builder.buildAsync(new DataVolumeAsyncCacheLoader(webClient, config, tracer)), tenantClient, tracer);
    } else {
        return new NoopResourceLimitChecks();
    }
}