org.apache.servicecomb.metrics.prometheus.TestPrometheusPublisher.java Source code

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Here is the source code for org.apache.servicecomb.metrics.prometheus.TestPrometheusPublisher.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.servicecomb.metrics.prometheus;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.reflect.FieldUtils;
import org.apache.servicecomb.foundation.common.exceptions.ServiceCombException;
import org.apache.servicecomb.foundation.test.scaffolding.config.ArchaiusUtils;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

import com.netflix.spectator.api.CompositeRegistry;
import com.netflix.spectator.api.Counter;
import com.netflix.spectator.api.DefaultRegistry;
import com.netflix.spectator.api.ManualClock;
import com.netflix.spectator.api.Registry;
import com.netflix.spectator.api.SpectatorUtils;
import com.sun.net.httpserver.HttpServer;

import io.prometheus.client.exporter.HTTPServer;

@SuppressWarnings("restriction")
public class TestPrometheusPublisher {
    CompositeRegistry globalRegistry = SpectatorUtils.createCompositeRegistry(new ManualClock());

    PrometheusPublisher publisher = new PrometheusPublisher();

    @Rule
    public ExpectedException thrown = ExpectedException.none();

    @AfterClass
    public static void teardown() {
        ArchaiusUtils.resetConfig();
    }

    @Test
    public void testBadPublishAddress() {
        thrown.expect(ServiceCombException.class);

        ArchaiusUtils.setProperty(PrometheusPublisher.METRICS_PROMETHEUS_ADDRESS, "a:b:c");
        publisher.init(globalRegistry, null, null);
    }

    @Test
    public void testBadPublishAddress_BadPort() {
        thrown.expect(ServiceCombException.class);

        ArchaiusUtils.setProperty(PrometheusPublisher.METRICS_PROMETHEUS_ADDRESS, "localhost:xxxx");
        publisher.init(globalRegistry, null, null);
    }

    @Test
    public void testBadPublishAddress_TooLargePort() {
        thrown.expect(ServiceCombException.class);

        ArchaiusUtils.setProperty(PrometheusPublisher.METRICS_PROMETHEUS_ADDRESS, "localhost:9999999");
        publisher.init(globalRegistry, null, null);
    }

    @Test
    public void collect() throws IllegalAccessException, IOException {
        ArchaiusUtils.setProperty(PrometheusPublisher.METRICS_PROMETHEUS_ADDRESS, "localhost:0");
        publisher.init(globalRegistry, null, null);

        Registry registry = new DefaultRegistry(new ManualClock());
        globalRegistry.add(registry);

        Counter counter = registry.counter("count.name", "tag1", "tag1v", "tag2", "tag2v");
        counter.increment();

        HTTPServer httpServer = (HTTPServer) FieldUtils.readField(publisher, "httpServer", true);
        com.sun.net.httpserver.HttpServer server = (HttpServer) FieldUtils.readField(httpServer, "server", true);

        URL url = new URL("http://localhost:" + server.getAddress().getPort() + "/metrics");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        try (InputStream is = conn.getInputStream()) {
            Assert.assertEquals("# HELP ServiceComb Metrics ServiceComb Metrics\n"
                    + "# TYPE ServiceComb Metrics untyped\n" + "count_name{tag1=\"tag1v\",tag2=\"tag2v\",} 1.0\n",
                    IOUtils.toString(is));
        }

        publisher.destroy();
    }
}