Following up on some of these.
On Jul 27, 2012, at 2:09 PM, Marina Vatkina wrote:
>
> 3. Use the "beanClass" instead of the "ejbClass" for the property name?
We can definitely do that.
> 2. Can we skip the marker interface altogether? If there is no implementing interface, it's a no-interface view. Plain and simple.
The only reason to keep it is because of the intricate roll it plays in deployment and linking MDBs to Connectors.
An simple alternative thought would be instead of requiring Connectors to supply a 'public interface Foo' as the message listener interface that is implemented by the MDB, allow the Connector to supply a 'public @interface Foo' as the message listener interface and have the MDB use that on the bean class.
From there on out everything would be identical.
So using the telnet example from this page:
We'd leave our ra.xml the same:
<connector version="1.5">
<description>Telnet ResourceAdapter</description>
<display-name>Telnet ResourceAdapter</display-name>
<vendor-name>SuperConnectors</vendor-name>
<eis-type>Telnet Adapter</eis-type>
<resourceadapter-version>1.0</resourceadapter-version>
<resourceadapter id="TelnetResourceAdapter">
<resourceadapter-class>com.superconnectors.telnet.adapter.TelnetResourceAdapter</resourceadapter-class>
<inbound-resourceadapter>
<messageadapter>
<messagelistener>
<messagelistener-type>com.superconnectors.telnet.api.TelnetListener</messagelistener-type>
<activationspec>
<activationspec-class>com.superconnectors.telnet.adapter.TelnetActivationSpec</activationspec-class>
</activationspec>
</messagelistener>
</messageadapter>
</inbound-resourceadapter>
</resourceadapter>
</connector>
Then our <messagelistener-type>, TelnetListener, is turned into an annotation
package com.superconnectors.telnet.api;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import java.lang.annotation.ElementType;
import java.lang.annotation.RetentionPolicy;
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface TelnetListener {
}
Then we just use the annotation instead:
package org.developer.application;
import com.superconnectors.telnet.api.Command;
import com.superconnectors.telnet.api.Option;
import com.superconnectors.telnet.api.TelnetListener;
import javax.ejb.MessageDriven;
@MessageDriven
@TelnetListener
public class MyMdb {
private final Properties properties = new Properties();
@Command("get")
public String doGet(@Option("key") String key) {
return properties.getProperty(key);
}
@Command("set")
public String doSet(@Option("key") String key, @Option("value") String value) {
final Object old = properties.setProperty(key, value);
final StringBuilder sb = new StringBuilder();
sb.append("set ").append(key).append(" to ").append(value);
sb.append("\n");
if (old != null) {
sb.append("old value: ").append(old);
sb.append("\n");
}
return sb.toString();
}
-David