org.springframework.cloud.launcher.h2.H2Application.java Source code

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Here is the source code for org.springframework.cloud.launcher.h2.H2Application.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.launcher.h2;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.h2.server.web.WebServlet;
import org.h2.tools.Console;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.context.SmartLifecycle;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;
import org.springframework.util.Assert;
import org.springframework.util.ReflectionUtils;
import org.springframework.util.StringUtils;

import java.util.concurrent.atomic.AtomicBoolean;

/**
 * @author Spencer Gibb
 */
@EnableDiscoveryClient
@SpringBootApplication
@Controller
public class H2Application {

    private static final Log log = LogFactory.getLog(H2Application.class);

    public static void main(String[] args) {
        SpringApplication.run(H2Application.class, args);
    }

    @Bean
    public ServletRegistrationBean h2Console() {
        String urlMapping = "/*";
        ServletRegistrationBean registration = new ServletRegistrationBean(new WebServlet(), urlMapping);
        registration.addInitParameter("-webAllowOthers", "");
        return registration;
    }

    @Service
    static class H2Server implements SmartLifecycle {
        private AtomicBoolean running = new AtomicBoolean(false);

        private Console console;

        @Value("${spring.datasource.url:jdbc:h2:tcp://localhost:9096/./target/test}")
        private String dataSourceUrl;

        @Override
        public boolean isAutoStartup() {
            return true;
        }

        @Override
        public void stop(Runnable callback) {
            stop();
            callback.run();
        }

        @Override
        public void start() {
            if (this.running.compareAndSet(false, true)) {
                try {
                    log.info("Starting H2 Server");
                    this.console = new Console();
                    this.console.runTool("-tcp", "-tcpAllowOthers", "-tcpPort", getH2Port(this.dataSourceUrl));
                } catch (Exception e) {
                    ReflectionUtils.rethrowRuntimeException(e);
                }
            }
        }

        private String getH2Port(String url) {
            String[] tokens = StringUtils.tokenizeToStringArray(url, ":");
            Assert.isTrue(tokens.length >= 5, "URL not properly formatted");
            return tokens[4].substring(0, tokens[4].indexOf("/"));
        }

        @Override
        public void stop() {
            if (this.running.compareAndSet(true, false)) {
                log.info("Stopping H2 Server");
                this.console.shutdown();
            }
        }

        @Override
        public boolean isRunning() {
            return this.running.get();
        }

        @Override
        public int getPhase() {
            return 0;
        }
    }
}