Examples with Exporter org.wildfly.swarm.microprofile.metrics.runtime.exporters.Exporter used on opensource projects

Example 1 with Exporter

use of org.wildfly.swarm.microprofile.metrics.runtime.exporters.Exporter in project wildfly-swarm by wildfly-swarm.

the class MetricsHttpHandler method handleRequest.

@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
    String requestPath = exchange.getRequestPath();
    if (dispatched.get() != null && dispatched.get().getCount() == 1) {
        next.handleRequest(exchange);
        dispatched.set(null);
        return;
    }
    if (!requestPath.startsWith("/metrics")) {
        next.handleRequest(exchange);
        return;
    }
    // request is for us, so let's handle it
    Exporter exporter = obtainExporter(exchange);
    if (exporter == null) {
        exchange.setStatusCode(406);
        exchange.setReasonPhrase("No exporter found for method " + exchange.getRequestMethod() + " and media type");
        return;
    }
    String scopePath = requestPath.substring(8);
    if (scopePath.startsWith("/")) {
        scopePath = scopePath.substring(1);
    }
    if (scopePath.endsWith("/")) {
        scopePath = scopePath.substring(0, scopePath.length() - 1);
    }
    StringBuilder sb;
    if (scopePath.isEmpty()) {
        // All metrics
        sb = exporter.exportAllScopes();
    } else if (scopePath.contains("/")) {
        // One metric in a scope
        String attribute = scopePath.substring(scopePath.indexOf('/') + 1);
        MetricRegistry.Type scope = getScopeFromPath(exchange, scopePath.substring(0, scopePath.indexOf('/')));
        if (scope == null) {
            exchange.setStatusCode(404);
            exchange.setReasonPhrase("Scope " + scopePath + " not found");
            return;
        }
        MetricRegistry registry = MetricRegistryFactory.get(scope);
        Map<String, Metric> metricValuesMap = registry.getMetrics();
        if (metricValuesMap.containsKey(attribute)) {
            sb = exporter.exportOneMetric(scope, attribute);
        } else {
            exchange.setStatusCode(404);
            exchange.setReasonPhrase("Metric " + scopePath + " not found");
            return;
        }
    } else {
        // A single scope
        MetricRegistry.Type scope = getScopeFromPath(exchange, scopePath);
        if (scope == null) {
            exchange.setStatusCode(404);
            exchange.setReasonPhrase("Scope " + scopePath + " not found");
            return;
        }
        MetricRegistry reg = MetricRegistryFactory.get(scope);
        if (reg.getMetadata().size() == 0) {
            exchange.setStatusCode(204);
            exchange.setReasonPhrase("No data in scope " + scopePath);
        }
        sb = exporter.exportOneScope(scope);
    }
    exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, exporter.getContentType());
    provideCorsHeaders(exchange);
    exchange.getResponseHeaders().put(new HttpString("Access-Control-Max-Age"), "1209600");
    exchange.getResponseSender().send(sb.toString());
}

Example 2 with Exporter

use of org.wildfly.swarm.microprofile.metrics.runtime.exporters.Exporter in project wildfly-swarm by wildfly-swarm.

the class MetricsHttpHandler method obtainExporter.

/**
 * Determine which exporter we want.
 * @param exchange The http exchange coming in
 * @return An exporter instance or null in case no matching exporter existed.
 */
private Exporter obtainExporter(HttpServerExchange exchange) {
    HeaderValues acceptHeaders = exchange.getRequestHeaders().get(Headers.ACCEPT);
    Exporter exporter;
    String method = exchange.getRequestMethod().toString();
    if (acceptHeaders == null) {
        if (method.equals("GET")) {
            exporter = new PrometheusExporter();
        } else {
            return null;
        }
    } else {
        // Header can look like "application/json, text/plain, */*"
        if (acceptHeaders.getFirst() != null && acceptHeaders.getFirst().startsWith("application/json")) {
            if (method.equals("GET")) {
                exporter = new JsonExporter();
            } else if (method.equals("OPTIONS")) {
                exporter = new JsonMetadataExporter();
            } else {
                return null;
            }
        } else {
            // This is the fallback, but only for GET, as Prometheus does not support OPTIONS
            if (method.equals("GET")) {
                exporter = new PrometheusExporter();
            } else {
                return null;
            }
        }
    }
    return exporter;
}