public class VelocityConfigurer extends WebApplicationObjectSupport {
// ---------------------------------------------------------------------
// Instance data
// ---------------------------------------------------------------------
/** Create a logging category that is available to subclasses. */
protected final Logger logger = Logger.getLogger(getClass().getName());
public static final String DEFAULT_VELOCITY_PROPERTIES = "velocity.properties";
private String url = "/WEB-INF/velocity.properties";
public void setUrl(String url) {
this.url = url;
}
/**
* Initializes the Velocity runtime, first calling loadConfiguration(ServletConvig) to get a
* java.util.Properties of configuration information and then calling Velocity.init(). Override
* this to do anything to the environment before the initialization of the singelton takes place,
* or to initialize the singleton in other ways.
*/
protected void init() throws ApplicationContextException {
try {
Properties p = new Properties();
logger.config("Loading Velocity properties from [" + this.url + "]");
p.load(
WebUtils.getResourceInputStream(
this.url, getWebApplicationContext().getServletContext()));
Velocity.init(p);
} catch (ServletException e) {
throw new ApplicationContextException(
"Error loading Velocity config from [" + this.url + "]", e);
} catch (IOException e) {
throw new ApplicationContextException(
"Error loading Velocity config from [" + this.url + "]", e);
} catch (Exception e) {
throw new ApplicationContextException(
"Error initializing Velocity from properties file (loaded OK) @[" + this.url + "]", e);
}
}
}
/**
* Initializes the Velocity runtime, first calling loadConfiguration(ServletConvig) to get a
* java.util.Properties of configuration information and then calling Velocity.init(). Override
* this to do anything to the environment before the initialization of the singelton takes place,
* or to initialize the singleton in other ways.
*/
protected void init() throws ApplicationContextException {
try {
Properties p = new Properties();
logger.config("Loading Velocity properties from [" + this.url + "]");
p.load(
WebUtils.getResourceInputStream(
this.url, getWebApplicationContext().getServletContext()));
Velocity.init(p);
} catch (ServletException e) {
throw new ApplicationContextException(
"Error loading Velocity config from [" + this.url + "]", e);
} catch (IOException e) {
throw new ApplicationContextException(
"Error loading Velocity config from [" + this.url + "]", e);
} catch (Exception e) {
throw new ApplicationContextException(
"Error initializing Velocity from properties file (loaded OK) @[" + this.url + "]", e);
}
}
/**
* Simple helper for JNDI lookup
*
* @author Rod Johnson
* @version
*/
public class JndiServices {
/** Create a logging category that is available to subclasses. */
protected final Logger logger = Logger.getLogger(getClass().getName());
private ContextFactory contextFactory;
public JndiServices() {
this.contextFactory = new DefaultContextFactory();
}
public JndiServices(ContextFactory contextFactory) {
this.contextFactory = contextFactory;
}
public void bind(final String name, final Object object) throws NamingException {
execute(
new ContextCallback() {
public void doInContext(Context ctx) throws NamingException {
ctx.bind(name, object);
logger.info("Bound JNDI object with name " + name);
}
});
}
public void unbind(final String name) throws NamingException {
execute(
new ContextCallback() {
public void doInContext(Context ctx) throws NamingException {
ctx.unbind(name);
logger.info("Unbound JNDI object with name " + name);
}
});
}
/** If this returns null, caller should deal with it */
public Object lookup(final String name) throws NamingException {
class LookupCallback implements ContextCallback {
private Object o;
public void doInContext(Context ctx) throws NamingException {
o = ctx.lookup(name);
logger.fine("Looked up JNDI object with name '" + name + "'");
}
public Object getObject() {
return o;
}
}
LookupCallback lc = new LookupCallback();
execute(lc);
return lc.getObject();
}
/** Open up what is done so clients can provide a context callback */
public void execute(ContextCallback cc) throws NamingException {
Context ctx = null;
try {
ctx = contextFactory.getContext();
cc.doInContext(ctx);
}
// catch (NamingException ex) {
// throw new NamingException(("Couldn't bind JNDI object to name [" + name + "]", ex);
// }
finally {
try {
if (ctx != null) ctx.close();
} catch (NamingException ex) {
//
}
}
} // execute
private class DefaultContextFactory implements ContextFactory {
public Context getContext() throws NamingException {
// Hashtable m = new Hashtable();
// m.put(weblogic.jndi.WLContext.REPLICATE_BINDINGS, "false");
// return new InitialContext(m);
return new InitialContext();
}
}
}
