How to inject the driverClassLoader property in spring? - java

I have the following partial spring context xml file:
<bean name="template" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource" />
</bean>
<bean name="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassLoader" value="" /> <!-- THIS PROPERTY -->
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3061/my_database" />
<property name="username" value="username" />
<property name="password" value="password" />
<property name="initialSize" value="8" />
</bean>
How do I inject the driverClassLoader property? (I'm using some custom plug-in architecture but not the spring dm server so have to provide a classloader to find the mysql driver)

this apache dbcp classloader bug was just fixed in march 2011.
It may fix your root issue so you don't need to inject the classloader...
https://issues.apache.org/jira/browse/DBCP-333
without this bug fix I don't think the driverClassloader setter was working....

I think you want to use the PropertyPlaceholderConfigurer. Look at section 3.7.2.1 in the Spring 2.0 reference guide.

Related

How to provide data source entry in spring annotation based project.

I am using spring 3 but my configuration is xml based in which I am trying to convert my project into annotation based using #configuration annotation.
I am little confused how to add data source entry as #Bean for two below cases
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/myds" />
</bean>
<bean id="data_source" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="url1" />
<property name="username" value="user1" />
<property name="password" value="****" />
</bean>

JdbcHttpSessionConfiguration messes my Bean Constants

I am using spring MVC 4.2 I have this code in my app-context.xml
<bean id="beanConstants" name="beanConstants" class="com.my.web.controller.BeanConstants">
<property name="dbProplocation" value="/my/database.properties" />
<property name="extractDbProplocation" value="/my/extract.database.properties" />
<property name="cssLocation" value="uncompiled" />
<property name="enableSuspensionPollingStr" value="false" />
</bean>
<!-- JDBC Session Config -->
<bean class="org.springframework.session.jdbc.config.annotation.web.http.JdbcHttpSessionConfiguration"/>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="${hibernate.connection.url}" />
<property name="username" value="${hibernate.connection.username}" />
<property name="password" value="${hibernate.connection.password}" />
</bean>
Now this all worked fine until I added the JdbcHttpSessionConfiguration bean. If I take that line out, it works. otherwise I get this:
Caused by: java.lang.IllegalArgumentException:
Could not resolve placeholder 'hibernate.connection.url' in string value "${hibernate.connection.url}"
I am trying to save the sesstion info in the DB. Why is this doing this? What has one got to do with the other?

Mysql configuration with spring

I have read Spring Fundamentals. Actually i visited many sites to know how to configure mysql database to spring project. But i have failed to get specific solution about it. so please help me to solve this problem.
<bean name="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/database" />
<property name="username" value="user" />
<property name="password" value="pass" />
</bean>
Springframework documentation
http://docs.spring.io/spring/docs/current/spring-framework-reference/html/jdbc.html#jdbc-datasource

Configuring apache dbcp PoolingDataSource with Spring

Tried to follow the pattern on apache dbcp examples, I understand everything except how and where the database properties come from and in which bean they have to be placed in application context.
I used Spring Data Source instead, but as I recall I configured it in hurry and I remember having difficulties with configuring the original dataSource provided by apache dbcp itself. So I happen to have time to face the problem and fulfill the original intent of using PoolingDataSource.
The reason I used Spring implementation is because it provides means of setting up the parameters to connect to database.
http://static.springsource.org/spring/docs/2.0.x/api/org/springframework/jdbc/datasource/DriverManagerDataSource.html
According to http://commons.apache.org/dbcp/apidocs/org/apache/commons/dbcp/PoolingDataSource.html
There are no methods to populate configuration like url or load driver.
I tried to track it through the object pools etc. , but got really lost.
Replying upfront: Yes, I don't want to use apache basicDataSource.
So now I am returning to the problem and can't really understand where to fetch the parameters? Driver? Url? It seems that url, pw and username are set on connection factory. But where to fetch postgresql driver to be loaded?
Please help to complete the configuration.
(using spring for configuration)
<!-- the one I want to use now -->
<bean id="dataSource" class="org.apache.commons.dbcp.PoolingDataSource">
<constructor-arg><ref bean="pool"/></constructor-arg>
</bean>
<!-- the one I used before as a workaround
<bean id="ds" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.postgresql.Driver"/>
<property name="url" value="jdbc:postgresql:postgres"/>
<property name="username" value="magicUserName"/>
<property name="password" value="magicPassword"/>
</bean> -->
<bean id="pool" class="org.apache.commons.pool.impl.GenericObjectPool">
<property name="minEvictableIdleTimeMillis"><value>300000</value </property>
<property name="timeBetweenEvictionRunsMillis"><value>60000</value </property>
</bean>
<bean id="dsConnectionFactory" class="org.apache.commons.dbcp.DataSourceConnectionFactory">
<constructor-arg><ref bean="dataSource"/></constructor-arg>
</bean>
<bean id="poolableConnectionFactory" class="org.apache.commons.dbcp.PoolableConnectionFactory">
<constructor-arg index="0"><ref bean="dsConnectionFactory"/ </constructor-arg>
<constructor-arg index="1"><ref bean="pool"/></constructor-arg>
<constructor-arg index="2"><null/></constructor-arg>
<constructor-arg index="3"><null/></constructor-arg>
<constructor-arg index="4"><value>false</value></constructor-arg>
<constructor-arg index="5"><value>true</value></constructor-arg>
</bean>
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<tx:annotation-driven transaction-manager="txManager" />
</beans>
I believe we are interested just in the first two, but I included everything just in case.
Seems to be there are many people using workarounds:
http://forum.springsource.org/showthread.php?10772-How-do-I-create-a-org-apache-commons-dbcp-PoolableConnection
You can config as below:
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="url" value="<put database connection url here>" />
<property name="username" value="XXXXXX" />
<property name="password" value="XXXXXXXX" />
<property name="driverClassName" value="<database driver here>" />
</bean>
<bean id="pool" class="org.apache.commons.pool.impl.GenericObjectPool">
<property name="minEvictableIdleTimeMillis"><value>300000</value></property>
<property name="timeBetweenEvictionRunsMillis"><value>60000</value></property>
</bean>
<bean id="dsConnectionFactory" class="org.apache.commons.dbcp.DataSourceConnectionFactory">
<constructor-arg><ref bean="dataSource"/></constructor-arg>
</bean>
<bean id="poolableConnectionFactory" class="org.apache.commons.dbcp.PoolableConnectionFactory">
<constructor-arg index="0"><ref bean="dsConnectionFactory"/></constructor-arg>
<constructor-arg index="1"><ref bean="pool"/></constructor-arg>
<constructor-arg index="2"><null/></constructor-arg>
<constructor-arg index="3"><null/></constructor-arg>
<constructor-arg index="4"><value>false</value></constructor-arg>
<constructor-arg index="5"><value>true</value></constructor-arg>
</bean>
<bean id="pooledDS" class="org.apache.commons.dbcp.PoolingDataSource"
depends-on="poolableConnectionFactory">
<constructor-arg><ref bean="pool"/></constructor-arg>
</bean>
And you can use "pooledDS" (PoolingDataSource) the same any orther DataSource.
Ortherwise, i think you should simply use BacsicDataSource, you still can config number of connections in pool by "initialSize" and "maxActive":
<bean id="basicDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="removeAbandoned" value="true"/>
<property name="initialSize" value="10" />
<property name="maxActive" value="50" />
</bean>

FileNotFoundException while running Spring and Ibatis based application on Tomcat

I am using Spring, ibatis for ORM. My app-config.xml look like
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://192.168.10.50/lmexdb_v1" />
<property name="username" value="lmexdba" />
<property name="password" value="lmexdba123#" />
</bean>
<bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
<property name="configLocation"
value="classpath:com/platysgroup/lmex/server/mobile/dao/ibatis/SqlMapConfig.xml" />
</bean>
<bean id="mobileController" class="com.platysgroup.lmex.server.controller.MobileController">
<property name="announcementService" ref="announcementService"></property>
<property name="courseService" ref="courseService"></property>
<property name="userService" ref="userService"></property>
</bean>
and I have my sqlmapconfig.xml file in src/webapp/spring.
But when I run my application on tomcat it show me a exception:
java.io.FileNotFoundException: class path resource [com/platysgroup/lmex/server/mobile/dao/ibatis/SqlMapConfig.xml] cannot be opened because it does not exist
put it in src , and it will be available
if you are using maven project then add it to resource

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