Adding mySql to eclipse project with maven tomcat plugin - mysql

Question

I have a spring mvc project downloaded from the web and fully working. I'm using maven and maven tomcat plugin to manage dependencies and to run the webapp in the built-in tomcat. I'm trying to add mySql support in my project. Since i'm new to maven and maven tomcat plugin, I don't know hot to do this. Before i tried to add mysql, all was working and i was able to launch my web app simply executing a tomcat:run maven goal.
For now, when i execute tomcat:run i get a
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Here is what i've already done after some reading around the web:
I added dependencies for mysql driver (and Hibernate annotations too since i want to use it) in my pom.xml, and specified the dependency for tomcat plugin:
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.9</version>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>tomcat-maven-plugin</artifactId>
<version>1.1</version>
<configuration>
<mode>context</mode>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.9</version>
</dependency>
</dependencies>
</plugin>
You can also notice a tag to specify to use a context.xml file. But I don't know where to put this file. I readed it should be generated automatically in tomcat/conf, but it's not present. So i added it manually with this content:
<?xml version="1.0" encoding="UTF-8"?>
<Context>
<Resource name="jdbc/mkyongdb" auth="Container" type="javax.sql.DataSource"
maxActive="50" maxIdle="30" maxWait="10000"
username="root" password="password"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/mkyongdb"/>
</Context>
Then in web.xml, located in tomcat/conf i added:
<resource-ref>
<description>MySQL Datasource example</description>
<res-ref-name>jdbc/mkyongdb</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
I placed the same content in src/main/webapp/META-INF/context.xml and in src/main/webapp/WEB-INF/web.xml
With all these configuration, the error mentioned above doesn't appears. But if i try to use hibernate adding
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/mkyongdb" />
<property name="username" value="root" />
<property name="password" value="password" />
</bean>
<bean
id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >
<property name="dataSource" >
<ref bean="dataSource" />
</property>
<property name="hibernateProperties" >
<props>
<prop key="hibernate.hbm2ddl.auto" >create-drop</prop>
<prop key="hibernate.dialect" >org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql" >true</prop>
</props>
</property>
<property name="annotatedClasses" >
<list>
<value>org.mose.grouporganizer.entity.AccelerometerFeatures</value>
</list>
</property>
</bean>
then i get the comunication link failure. What i'm missing?
If it's needed i can add the full stack trace.

Answer 1

If your application works fine and you want to use MySQL as your database then you should add MySQL driver in your pom.xml and change Hibernate configuration. That it.

Answer 2

First upgrade to last tomcat maven plugin which is now at Apache.
See http://tomcat.apache.org/maven-plugin-2.0/
Regarding the context use
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<configuration>
<contextFile>path to your context file</contextFile>
</configuration>
</plugin>