I've just started working with flex (and flex data services)
and have been experimenting with directly calling the createItem
method (extending AbstractAssembler) as a way of poking data into a
server-side DB. It's probable I'm just not using the flex
methodology correctly, but every time I try to run my test case I
am getting the error detailed below. I'd appreciate any pointers as
to where I'm going wrong...
Error in Tomcat log:
quote:
Exception in RtmpReader thread:
flex.messaging.MessageException: Cannot create class of type
'com.mycompany.learning.User'. Type 'com.mycompany.learning.User'
not found.
flex.messaging.MessageException: Cannot create class of type
'com.mycompany.learning.User'. Type 'com.mycompany.learning.User'
not found.
at
flex.messaging.util.ClassUtil.createClass(ClassUtil.java:57)
at
flex.messaging.io.AbstractProxy.createInstance(AbstractProxy.java:83)
at
flex.messaging.io.amf.Amf3Input.readScriptObject(Amf3Input.java:364)
at
flex.messaging.io.amf.Amf3Input.readObjectValue(Amf3Input.java:134)
at
flex.messaging.io.amf.Amf3Input.readObject(Amf3Input.java:116)
at
flex.messaging.io.amf.Amf3Input.readScriptObject(Amf3Input.java:392)
at
flex.messaging.io.amf.Amf3Input.readObjectValue(Amf3Input.java:134)
at
flex.messaging.io.amf.Amf3Input.readObject(Amf3Input.java:116)
at
flex.messaging.io.amf.Amf3Input.readArray(Amf3Input.java:323)
at
flex.messaging.io.amf.Amf3Input.readObjectValue(Amf3Input.java:138)
at
flex.messaging.io.amf.Amf3Input.readObject(Amf3Input.java:116)
at
flex.messaging.io.amf.Amf3Input.readScriptObject(Amf3Input.java:392)
at
flex.messaging.io.amf.Amf3Input.readObjectValue(Amf3Input.java:134)
at
flex.messaging.io.amf.Amf3Input.readObject(Amf3Input.java:116)
at
flex.messaging.io.amf.Amf0Input.readObjectValue(Amf0Input.java:125)
at
flex.messaging.io.amf.Amf0Input.readObject(Amf0Input.java:85)
at
flex.messaging.io.tcchunk.TCCommand.readMessage(TCCommand.java:177)
at
flex.messaging.endpoints.rtmp.AbstractRTMPServer.dispatchMessage(AbstractRTMPServer.java:563)
at
flex.messaging.endpoints.rtmp.NIORTMPConnection$RTMPReader.run(NIORTMPConnection.java:665)
at
edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:643)
at
edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:668)
at java.lang.Thread.run(Thread.java:613)
The client side Actionscript class looks like this:
quote:
package com.mycompany.learning
{
[RemoteClass(alias="com.mycompany.learning.User")]
public class User
{
public function User() {}
public var userId:int;
public var firstname:String;
public var surname:String;
public var email:String;
public var username:String;
public var password:String;
}
}
It's used in my mxml code as follows:
quote:
userDS = new DataService("account");
...
user = new User();
user.firstname = fNameV;
user.surname = sNameV;
user.username = userNameV;
user.password = passwordV;
user.email = userEmailV;
var ref:ItemReference = userDS.createItem(user);
Alert.show(ref.message.toString());
My destination xml definition looks like this:
quote:
<destination id="account">
<adapter ref="java-dao" />
<channels>
<channel ref="my-rtmp"/>
<channel ref="my-http"/>
</channels>
<properties>
<source>com.mycompany.learning.UserAssembler</source>
<scope>application</scope>
<metadata>
<identity property="userId"/>
</metadata>
<network>
<session-timeout>20</session-timeout>
<paging enabled="false" pageSize="10" />
<throttle-inbound policy="ERROR" max-frequency="500"/>
<throttle-outbound policy="REPLACE"
max-frequency="500"/>
</network>
<item-class>com.mycompany.learning.User</item-class>
</properties>
</destination>
And finally (sorry about the length of this posting) the java
code for the Assembler and server-side User object looks like this:
quote:
package com.mycompany.learning;
public class User
{
private int userId;
private String firstname;
private String surname;
private String email;
private String username;
private String password;
public String getFirstname()
{
return firstname;
}
...etc...
}
quote:
package com.mycompany.learning;
import java.util.*;
import flex.data.ChangeObject;
import flex.data.DataSyncException;
import flex.data.assemblers.AbstractAssembler;
public class UserAssembler extends AbstractAssembler
{
public List loadUsers()
{
UserDAO dao = new UserDAO();
return dao.getUsers();
}
public Object getItem(Map uid)
{
UserDAO dao = new UserDAO();
return dao.getUser(((Integer)
uid.get("userId")).intValue());
}
public void createItem(Object item)
{
System.out.println("HELLO!");
UserDAO dao = new UserDAO();
dao.create((User)item);
}
}
(I haven't seen the HELLO println call ever made.)
