Springboot解决Main方法启动无法注入JNDI

Springboot解决Main方法启动无法注入JNDI

上一篇Springboot配置外部容器使用JNDI读取数据源，讲到部署到web容器如何使用JNDI读取数据源。

那么在开发时Main方法启动怎么使用JNDI读取数据源？？

需求

仅在dev环境下解决main方法无法注入JNDI，生产和测试需要部署在web容器中

步骤

• 配置application-dev.yml

## 仅在dev环境下注入有效，解决main方法无法注入JNDI—— @Profile("dev")
jndi:
  dev:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://192.168.xxx.xxx:3306/test
    username: root
    password: root

• 配置JndiDevConfig

package cn.pconline.config.dev;

import org.apache.catalina.Context;
import org.apache.catalina.startup.Tomcat;
import org.apache.tomcat.util.descriptor.web.ContextResource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.embedded.tomcat.TomcatWebServer;
import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;

import javax.sql.DataSource;

/**
 * @Description 仅在dev环境下有效解决main方法无法注入JNDI
 *              生产和测试需要部署在web容器中
 * https://412887952-qq-com.iteye.com/blog/2429442
 * @Author jie.zhao
 * @Date 2019/7/31 14:19
 */
@Configuration
@Profile("dev")
public class JndiDevConfig {

    @Value("${spring.datasource.jndi-name}")
    private String jndiName;

    @Value("${jndi.dev.driver-class-name}")
    private String driverClassName;

    @Value("${jndi.dev.url}")
    private String url;

    @Value("${jndi.dev.username}")
    private String username;

    @Value("${jndi.dev.password}")
    private String password;

    @Bean
    public ServletWebServerFactory servletContainer() {
        TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory() {
            @Override
            protected TomcatWebServer getTomcatWebServer(Tomcat tomcat) {
                tomcat.enableNaming();
                return super.getTomcatWebServer(tomcat);
            }

            @Override
            protected void postProcessContext(Context context) {
                ContextResource resource = new ContextResource();
                resource.setName(jndiName);
                resource.setType(DataSource.class.getName());
                resource.setProperty("driverClassName", driverClassName);
                resource.setProperty("url", url);
                resource.setProperty("username", username);
                resource.setProperty("password", password);
                context.getNamingResources().addResource(resource);
                super.postProcessContext(context);
            }
        };
        return tomcat;
    }
}

• 启动报错

SpringBoot JNDI datasource throws java.lang.ClassNotFoundException: org.apache.tomcat.dbcp.dbcp2.BasicDataSourceFactory

原因是缺少依赖

<!--解决Dev环境下mian方法使用JNDI连接池，正式打包不需要 provided-->
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-dbcp</artifactId>
    <version>8.5.4</version>
    <scope>provided</scope>
</dependency>

参考文档：

https://412887952-qq-com.iteye.com/blog/2429442

https://stackoverflow.com/questions/39284947/springboot-jndi-datasource-throws-java-lang-classnotfoundexception-org-apache-t