Springboot quartz集群(1) — 项目跑起来

谁践踏了优雅 2022-06-12 04:51 219阅读 0赞

*  开发工具：  
    
    
    1.  IDEA 2017.1.5
    2.  Maven项目管理

## 1. 新建springboot模块 ##

*  模块名称：`cnlm-springboot-quartz`  
    ![项目结构][SouthEast]

## 2. 重命名springboot启动类为Application ##

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

## 3. 运行：果然预料之中，运行不起来，报错，异常信息： ##

2017-07-15 21:31:38.178  WARN 5320 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).
    2017-07-15 21:31:38.182  INFO 5320 --- [           main] utoConfigurationReportLoggingInitializer : 
    
    Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
    Disconnected from the target VM, address: '127.0.0.1:43215', transport: 'socket'
    2017-07-15 21:31:38.187 ERROR 5320 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 
    
    ***************************
    APPLICATION FAILED TO START
    ***************************
    
    Description:
    
    Cannot determine embedded database driver class for database type NONE
    
    Action:
    
    If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).
    
    
    Process finished with exit code 1

初步判断是由于没有设置数据源导致，  
resources/application.properties文件加入数据库连接配置：

## master 数据源配置
    master.datasource.url=jdbc:mysql://localhost:3306/cnlm-blog?useUnicode=true&characterEncoding=utf8
    master.datasource.username=root
    master.datasource.password=123456
    master.datasource.driverClassName=com.mysql.cj.jdbc.Driver
    server.port=22222
    # 配置mapper的扫描，找到所有的mapper.xml映射文件
    mybatis.mapperLocations=classpath:mapper/**/*.xml
    # 加载全局的配置文件
    mybatis.configLocation=classpath:mybatis-config.xml

pom.xml文件中加入mysql数据库java版驱动依赖

<dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql-connector-java.version}</version>
    </dependency>

pom.xml文件中加入阿里巴巴开源数据库框架druid的依赖

<dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>${druid.version}</version>
    </dependency>

至此，创建一个类用于初始化数据库连接

package me.cnlm.springboot.quartz.datasource;
    
    import com.alibaba.druid.pool.DruidDataSource;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.mybatis.spring.SqlSessionFactoryBean;
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.Primary;
    import org.springframework.core.io.DefaultResourceLoader;
    import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
    import org.springframework.jdbc.datasource.DataSourceTransactionManager;
    
    import javax.sql.DataSource;
    
    /** * @author zhuxl@paxsz.com * @time 2017/5/4 */
    @Configuration
    // 扫描 Mapper 接口并容器管理
    @MapperScan(basePackages = {MasterDataSourceConfig.PACKAGE_DAO}, sqlSessionFactoryRef = "masterSqlSessionFactory")
    
    public class MasterDataSourceConfig { 
    
        static final String PACKAGE_DAO = "me.cnlm.springboot.quartz.dao";
    
        @Value("${mybatis.mapperLocations}")
        private String mapperLocation;
    
        @Value("${mybatis.configLocation}")
        private String configLocation;
    
        @Value("${master.datasource.url}")
        private String url;
    
        @Value("${master.datasource.username}")
        private String user;
    
        @Value("${master.datasource.password}")
        private String password;
    
        @Value("${master.datasource.driverClassName}")
        private String driverClass;
    
        @Bean(name = "masterDataSource")
        @Primary
        public DataSource masterDataSource() {
            DruidDataSource dataSource = new DruidDataSource();
            dataSource.setDriverClassName(driverClass);
            dataSource.setUrl(url);
            dataSource.setUsername(user);
            dataSource.setPassword(password);
            return dataSource;
        }
    
        @Bean(name = "masterTransactionManager")
        @Primary
        public DataSourceTransactionManager masterTransactionManager() {
            return new DataSourceTransactionManager(masterDataSource());
        }
    
        @Bean(name = "masterSqlSessionFactory")
        @Primary
        public SqlSessionFactory masterSqlSessionFactory(@Qualifier("masterDataSource") DataSource masterDataSource)
                throws Exception {
            final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
            sessionFactory.setDataSource(masterDataSource);
            sessionFactory.setConfigLocation(new DefaultResourceLoader().getResource(configLocation));
            sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                    .getResources(mapperLocation));
    
            return sessionFactory.getObject();
        }
    }

## 4. 再次运行，还是惊吓！！！ ##

这次异常：

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'masterSqlSessionFactory' threw exception; nested exception is java.io.FileNotFoundException: class path resource [mapper/] cannot be resolved to URL because it does not exist
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
        ... 17 common frames omitted
    Caused by: java.io.FileNotFoundException: class path resource [mapper/] cannot be resolved to URL because it does not exist

….  
….  
….  
期间还需要添加相关依赖，最后在运行的时候已经习惯了，还是异常：

Unregistering JMX-exposed beans on shutdown

网上一搜，答案一大堆，原来是没有引入嵌入式tomcat，springboot默认的嵌入容器是tomcat，也可以自定义使用jetty，网上很多答案是加的：

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
    </dependency>

但我加的是下面这个，它包括了上面的tomcat依赖

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

## 5. 再次启动，这次终于成功运行起来了。另外需要说明的是，上述我引入了mybatis的额外配置文件以及mybatis写sql的xml扫描路径，所以需要添加 ##

*  resources/mybatis
 *  resources/mybatis-config.xml

本期已结束  
下一期：Springboot quartz集群(2) — 发送邮件  
[https://blog.csdn.net/musuny/article/details/75807735][https_blog.csdn.net_musuny_article_details_75807735]

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[SouthEast]: /images/20220612/f4bbe3cc640d41dc81f90f8b3d5289a3.png
[https_blog.csdn.net_musuny_article_details_75807735]: https://blog.csdn.net/musuny/article/details/75807735