问题
I have an existing Spring web-based application that has datasources defined using JNDI, and I'm trying to create a standalone app to use the beans. How can I create the JNDI entry and database properties programmatically in the standalone application?
<bean id="myDataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:comp/env/jdbc/MyDS" />
</bean>
public static void main(String[] args) {
// this throws an error since the JNDI lookup fails - can I programmatically define the database properties here?
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
UserService userService = ctx.getBean(UserService.class);
User user = userService.findUserById("jdoe");
System.out.println("display name: " + user.getDisplayName());
}
EDIT:
I tried something like this, but am now getting the error "javax.naming.NoInitialContextException: Need to specify class name in environment or system property"
public static void main(String[] args) {
setupJNDI();
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
UserService userService = ctx.getBean(UserService.class);
User user = userService.findUserById("jdoe");
System.out.println("display name: " + user.getDisplayName());
}
private static void setupJNDI() {
InitialContext ic;
try {
ic = new InitialContext();
ic.createSubcontext("java:");
ic.createSubcontext("java:/comp");
ic.createSubcontext("java:/comp/env");
ic.createSubcontext("java:/comp/env/jdbc");
SQLServerConnectionPoolDataSource myDS = new SQLServerConnectionPoolDataSource();
opaDS.setServerName("myserver");
opaDS.setPortNumber(1433);
opaDS.setUser("user");
opaDS.setPassword("password");
ic.bind("java:/comp/env/jdbc/MyDS", myDS);
} catch (NamingException e) {
e.printStackTrace();
}
}
回答1:
The org.springframework.test
dependency has support for that via the SimpleNamingContextBuilder:
// First create the mock JNDI tree and bind the DS
SimpleNamingContextBuilder builder = new SimpleNamingContextBuilder();
DataSource ds = new ComboPooledDataSource();
ds.setDriverClass( ... ); // etc. for uid, password, url
builder.bind( "java:comp/env/jdbc/MyDS" , ds );
builder.activate();
// Then create the Spring context, which should now be able
// to resolve the JNDI datasource
ApplicationContext context = new ClassPathXmlApplicationContext( "..." );
That should work.
Cheers,
来源:https://stackoverflow.com/questions/14982125/programmatically-creating-a-jndi-datasource-for-spring