SymetricWebServer不在嵌入式模式下启动

Posted 2023-01-07

我有一个带有SymetricDS的Spring boot maven项目。当我以嵌入式模式启动应用程序时，即使我具有带有Spring引导程序的Tomcat，它也在寻找Jetty。

SymmetricWebServer node = new SymmetricWebServer("server.properties");


<dependency>
   <groupId>org.jumpmind.symmetric</groupId>
   <artifactId>symmetric-server</artifactId>
   <version>3.5.19</version>
</dependency>

例外：

Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jetty/server/bio/SocketConnector

为什么？为什么依赖性不通过symetric-server下载？

答案

“提供了对Jetty的maven依赖，因为可以将对称服务器构建为一场可以部署到任意数量的Web服务器的战争。这是我如何使用Spring Boot提供的Web容器将SymmetricDS嵌入Spring Boot中的本质。

import org.jumpmind.symmetric.common.ParameterConstants;
import org.jumpmind.symmetric.web.ServerSymmetricEngine;
import org.jumpmind.symmetric.web.SymmetricEngineHolder;
import org.jumpmind.symmetric.web.SymmetricServlet;
import org.jumpmind.symmetric.web.WebConstants;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.servlet.ServletContext;
import javax.sql.DataSource;
import java.util.Properties;

@Configuration
public class SymDSModule implements ApplicationListener<ApplicationReadyEvent> 

    @Autowired
    ServletContext servletContext;

    @Autowired
    DataSource dataSource;

    @Autowired
    ApplicationContext applicationContext;

    @Override
    final public void onApplicationEvent(ApplicationReadyEvent event) 
        SymmetricEngineHolder holder = new SymmetricEngineHolder();
        Properties properties = new Properties();

        properties.put(ParameterConstants.DATA_LOADER_IGNORE_MISSING_TABLES, "true");
        properties.put(ParameterConstants.TRIGGER_CREATE_BEFORE_INITIAL_LOAD, "false");
        properties.put(ParameterConstants.AUTO_RELOAD_ENABLED, "true");
        properties.put(ParameterConstants.AUTO_REGISTER_ENABLED, "true");

        ServerSymmetricEngine serverEngine = new ServerSymmetricEngine(dataSource, applicationContext, properties, false, holder);

        holder.getEngines().put(properties.getProperty(ParameterConstants.EXTERNAL_ID), serverEngine);
        holder.setAutoStart(false);
        servletContext.setAttribute(WebConstants.ATTR_ENGINE_HOLDER, holder);

        serverEngine.setup();
        serverEngine.start();
    

    @Bean
    public ServletRegistrationBean<SymmetricServlet> symServlet() 
        ServletRegistrationBean<SymmetricServlet> bean = new ServletRegistrationBean<>(new SymmetricServlet(), "/sync");
        bean.setLoadOnStartup(1);
        return bean;