org.springframework.cloud.sleuth.benchmarks.app.SleuthBenchmarkingSpringApp.java Source code

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Here is the source code for org.springframework.cloud.sleuth.benchmarks.app.SleuthBenchmarkingSpringApp.java

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/*
 * Copyright 2013-2016 the original author or authors.
 *
 * Licensed 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.springframework.cloud.sleuth.benchmarks.app;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import javax.annotation.PreDestroy;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.EmbeddedServletContainerInitializedEvent;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.cloud.sleuth.Sampler;
import org.springframework.cloud.sleuth.sampler.AlwaysSampler;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.util.SocketUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Marcin Grzejszczak
 */
@SpringBootApplication
@RestController
@EnableAsync
public class SleuthBenchmarkingSpringApp implements ApplicationListener<EmbeddedServletContainerInitializedEvent> {

    private static final Log log = LogFactory.getLog(SleuthBenchmarkingSpringApp.class);

    public final ExecutorService pool = Executors.newWorkStealingPool();

    public int port;

    @RequestMapping("/foo")
    public String foo() {
        return "foo";
    }

    @RequestMapping("/bar")
    public Callable<String> bar() {
        return () -> "bar";
    }

    @RequestMapping("/async")
    public String asyncHttp() throws ExecutionException, InterruptedException {
        return this.async().get();
    }

    @Async
    public Future<String> async() {
        return this.pool.submit(() -> "async");
    }

    @Override
    public void onApplicationEvent(EmbeddedServletContainerInitializedEvent event) {
        this.port = event.getEmbeddedServletContainer().getPort();
    }

    @Bean
    public EmbeddedServletContainerFactory servletContainer(@Value("${server.port:0}") int serverPort) {
        log.info("Starting container at port [" + serverPort + "]");
        return new TomcatEmbeddedServletContainerFactory(
                serverPort == 0 ? SocketUtils.findAvailableTcpPort() : serverPort);
    }

    @PreDestroy
    public void clean() {
        this.pool.shutdownNow();
    }

    @Bean
    public Sampler alwaysSampler() {
        return new AlwaysSampler();
    }

    public ExecutorService getPool() {
        return this.pool;
    }

    public static void main(String... args) {
        SpringApplication.run(SleuthBenchmarkingSpringApp.class, args);
    }
}