Question

我有一个新的Spring Boot Web应用程序，我想连接到JNDI数据源（在Tomcat的context.xml中定义的MySQL数据库）。

但是当我尝试这个时，我总是得到以下异常;

org.springframework.beans.factory.BeanCreationException: Cannot determine embedded database url for database type NONE. If you want an embedded database please put a supported on on the classpath.

尽管我的pom.xml包含MySQL连接器

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>org.test</groupId>
<artifactId>twojndi</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<name>Two JNDI Data Sources</name>
<description>Two JNDI Data Sources Example</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.1.8.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

<dependencies>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-entitymanager</artifactId>
            </exclusion>
            <exclusion>
                <artifactId>tomcat-jdbc</artifactId>
                <groupId>org.apache.tomcat</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
    </dependency>
</dependencies>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <start-class>org.test.twojndi.Application</start-class>
    <java.version>1.7</java.version>
</properties>

<build>
    <finalName>${artifactId}</finalName>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

</project>

我已经使用jndi-name属性定义了我的application.properties。

spring.datasource.jndi-name=java:comp/env/jdbc/twojndi_ds1
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect

然而，尽管Spring认为应该使用内存数据库。

如果我将application.properties定义为

，我就可以连接到MySQL数据库

spring.datasource.url=jdbc:mysql://localhost:3306/twojndi_ds1
spring.datasource.username=twojndi
spring.datasource.password=twojndi
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect

任何人都可以帮我用Spring Boot连接到JNDI吗？

Answer 1

正如M. Deinum评论的那样，JDNI查找在Spring Boot 1.2中实现，当前版本为1.2.0.M2。

如果你想用Spring Boot 1.1做，你可以像这样定义一个bean：

@Bean
public DataSource dataSource() {
    JndiObjectFactoryBean jndiObjectFactoryBean = new JndiObjectFactoryBean();
    jndiObjectFactoryBean.setJndiName("jdbc/jndidatasource");
    try {
        jndiObjectFactoryBean.afterPropertiesSet();
    } catch (NamingException e) {
        LOGGER.error("Error while retrieving datasource with JNDI name jdbc/jndidatasource", e);
    }
    return (DataSource) jndiObjectFactoryBean.getObject();
}

Answer 2

对于我来说，它按照link中公开的配方进行了以下配置，但正如他们在使用Spring boot 1.2或更高版本的相同工作之前所说的那样

public class DomainAndPersistenceJndi {
private JpaVendorAdapter jpaVendorAdapter() {
    HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();
    hibernateJpaVendorAdapter.setShowSql(true);
    hibernateJpaVendorAdapter.setDatabase(Database.INFORMIX);
    hibernateJpaVendorAdapter.setDatabasePlatform("org.hibernate...");
    return hibernateJpaVendorAdapter;
}

@Bean(name = "dataSourcejndi")
public DataSource dataSourcejndi() throws NamingException {
    JndiObjectFactoryBean bean = new JndiObjectFactoryBean();
    bean.setJndiName("java:jboss/datasources/..." );
    bean.setProxyInterface(DataSource.class);
    bean.setLookupOnStartup(false);
    bean.afterPropertiesSet();
    return (DataSource) bean.getObject();
}

@Bean(name = "entityManagerFactoryJndi")
public LocalContainerEntityManagerFactoryBean entityManagerFactoryJndi(@Qualifier("dataSourcejndi") DataSource dataSource) {

    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
    em.setDataSource( dataSource);
    em.setPackagesToScan(EntidadBase.class.getPackage().getName());
    em.setJpaVendorAdapter(jpaVendorAdapter());
    em.setPersistenceUnitName("BaseDSjdni");

    em.afterPropertiesSet();

    return em;      
}

}

使用JNDI数据源进行Spring Boot

2 个答案: