Java :: RemoteObject In BlazeDS Environment: Serializing Objects From JAXB / XJC-generated Classes
May 10, 2011
I'm developing a webapp with Java backend and Flash (pure ActionScript) frontend using BlazeDS. I'm using the RemoteObject stuff to send objects, using custom serialization, where I need to implement Externalizable (Java) and IExternalizable (AS) interfaces. This works fine so far.
But now I need to send objects from Java to Flash, whose classes are generated with JAXB/XJC. Of course these generated Java classes don't implement the Externalizable interface, so it seems that I can't use my approach here. One possibility seems to be writing a XJC plugin which makes the classes implement Externalizable. But this looks like a tough job...
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Sep 30, 2009
When I pass a Actionscript Value Object that contains a Date variable using BlazeDS it is not getting transferring as a java.util.Date object correctly. When the setBaseDatefunction gets called on the Java side the baseDate value is NULL. The weird thing is if I rename the variable on the Java side to private Date date; and create a public void setDate( Date date) function it works. The problem is I need to pass 2 different dates so I can't uses this work around.
Here are my 2 classes:
AS3
package com.shua.flex.valueobjects {
[Bindable]
[RemoteClass(alias='com.shua.valueObjects.myVO')]
public class myVO {
public var label:String;
public var endDate:Date;
[Code] .....
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Mar 24, 2010
I am using Flex 3 and make a call through a RemoteObject to a Java 1.6 method and exposed with BlazeDS and Spring 2.5.5 Integration over a SecureAMFChannel. The ActionScript is as follows (this code is an example of the real thing which is on a separate dev network);
[Code]...
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Dec 7, 2010
Right away i just try to explain my problem: Using BlazeDS i got the following Javaclasses:
[Code]...
Then i got a Flex service class calling BlazeDS and executing the getCategories java method. Since Flash dosn't seem to understand typed arrays, the result from that method which i get back in flex is a simple array of untyped objects (the mapping dosn't seem to work here, even tought the class category exists in flex and has the same properties).
thats the first thing. but however, i'm converting the untyped objects manually into objects of the category.as class. the second thing is that categories have child-categories within the java object, which are also ArrayLists of the type category.java. the problem about that: my result event object only contains the first level of categories, looking into them the children are allways null. i dunno why they are empty, since they ARE part of the java object category.
and the third thing (the strangest by fast), you maybe noticed i named the properties of the category.java class strange, like idCat and nameTest instead of simply id and name. why that? because the property names of my flex result objects dont seem to change when i change the java objects properties names (result object properties are named "id" and "name" but the java class object properties are named "idCAT" and "nameTEST"). that it REALLY strange, since if i set the properties, like you see at nameTEST = "TESTNAME" it IS recogniced by flex, only the proertyNAMES dont seem to be recognized at all.
[Code]...
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Mar 25, 2011
I have 2 java classes that are the same (imagine the getters and setters):
class ScheduledEvent {
private String eventName;
private List<eventValues> values; [code]....
Now there is a reason why there are two classes that are the same.When something is "scheduled", I should get the ScheduleEvent object and when an event is started, I should get the StartEvent object.And depending on the object I get back, I do different things.My problem is that, on the backend, it will send me the ScheduleEvent object, but once it got to the flex side (via BlazeDS), it becomes a StartEvent....
At first, I thought it's because these two events have exactly the same variables, so I tried changing ScheduledEvent by adding a dummy variable (String foobar) but that didn't seem to make a difference.
EDIT: I'm using BlazeDS messaging system.That's why I am not using "one java method call to one responder" approach. So, in the message.body, I should be getting ScheduledEvent but I keep receiving StartEvent. I'm wondering if it's because the two objects have the same property and BlazeDS doesn't know how to map them correctly... I even put a break point in the java service layer, to make sure that the appropriate object is being sent back and it is... But by the time BlazeDS serializes and deserializes it to the flex side, it is now a StartEvent.
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Jun 11, 2009
I'm using BlazeDS to remote some Java objects that I'm consuming in a Flex application. I'm getting a type coercion error with one of my classes that I can't for the life of me figure out. I have other classes that are working fine using the same data types, and I've gone over my mapping a dozen times. I'm following all of the necessary conventions for getters and setters as far as I know...
Anyhow, my question is: how can I debug this problem? Running the Flex app in debug mode spits out some generic errors to the console that don't really help much (TypeError: Error #1034: Type Coercion failed: cannot convert Object@5d1d809 to valueObjects.SomeClass.).
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Sep 7, 2010
I'm using Flex 3.5, BlazeDS 3.2.0.3978 and EJB3 for backend. There are two RPC which are important to the problem. The first call will get a list of ThirdParty objects, this works fine. The second call happens when the user clicks on a ThirdParty, the details of this object (lazy collections) are retrieved. A single object is returned with most fields serialized. I say most, because for some reason, 4 boolean fields are not serialized and are put on false by flex by default.[code]I've set blazeDS logging to debug and all fields but these booleans are shown in the output. Next, I've tried stepping through the serialization process but it's fairly easy to get lost in there.
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Oct 27, 2010
I am working on an application that is near the end of its development cycle and has mostly passed user testing. We recently realized that having flex convert dates to the client's local timezone is not desired, as all of our dates are in EST and contain no time data. Since BlazeDS sends dates in UTC, this results in the dates being converted to the day before in timezones west of EST.
The best solution is to go in and refactor all dates to adjust for the timezone offset, but that is just not doable at this stage. Since all dates in our application don't care about time, I would really like to be able to intercept all Date objects that come across BlazeDS and adjust for the timezone offset.
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Jul 24, 2011
I am working on an Adobe Flex front-end with a Java back-end using JPA for persistence. he protocol I am using is remote objects (AMF) implemented with BlazeDS.I started out with a service-facade and entity DAOs, but without any specific DTOs. The same POJOs, the domain objects, were passed in the service-facade as those used as DTOs passed to the Hibernate DAOs.However, the latest few days I have been thinking whether this is a good approach or not. The latest article on the subject I read was this one:Interesting JPA Pattern blogThe situation:Say I have POJO Book with a unidirection ManyToOne relation with the POJO Category (i.e. each book may only be associated with one category, but the same category may be associated with many books). I see some alternatives:Alternative 1:I expose a method/operation addUpdateBook(Book book). In the implementation of this operation I add/update both the book and the referenced category.
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Jul 11, 2009
I have a couple of remote object methods that I want to respond to in different ways depending on the context, but I'd rather not set up a bunch of different RemoteObject aliases.Some background: Let's say I have an admin application that displays sales stats in different ways. The remote method looks like:
<mx:RemoteObject id="rpt" destination="AMFServer">
<mx:method name="getSalesStats" fault="getSalesStatsFault(event)"
result = "getSalesStatsSuccess(event)" />[code]........
The getSalesStats method takes an employee ID and a sales type as its arguments. You'd call it like:
rpt.getSalesStats(120, "peanuts");
public function getSalesStatsSuccess(e:ResultEvent):void {
salesdata:ArrayCollection = e.result.rows as ArrayCollection;[code]......
I'd like to pass something through the remote method to the responding function, like:
rpt.getSalesStats(120, "peanuts", "clicked button one");
but that of course throws an error because the server doesn't want that last argument.
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Aug 13, 2010
i am working on a flex+java combined project.My IDE and computer configuration is as follows:
[Code]...
When i make a small change in Flex code (eg, reposition of a button...anything), and run the project on server, it does make any change on output. Actually it depends on my luck... because it makes change in output randomly.what is is happening? tried rebuild, republish, clean , restart server, restarting the IDE, restarting the computer all available feature i could think. Also, i created a simple flex project on IDE and compiled it..... everything is compiled and displayed on output.
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Jan 6, 2011
I'm trying to serialize an object which has an InputStream. I need it to arrive on the flex client as a ByteArray.
[Code]...
I've set breakpoints in this code, and I see it being called as expected. However when the object arrives on the client, the input stream is typed as Object, and it contains no properties. What am I doing wrong?
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Mar 23, 2010
I'm coding a web app in flex blazeds and Java. I installed the Eclipse plugins for using WTP mixed project. I'm using flex's server that uses an emulate of tomcat when i ran my flex service the web app got the datas, everythings is ok. the problem is when i copy the project with all files generated by flex in my tomcat or the blazeds's tomcat, it doesn't work, this is becasue i want to implement my app on a server the error is:[code]
i don't know why tomcat doesn't find the class of flex.messaging.endpoints.AMFEndpoint that is used for my-amf 'URL...'. all works well in the emulated server that flex has.
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Nov 11, 2010
I'm programming Rich web applications with Flex and Java on Flex Builder 3 using blazeDS and SharedObjects.Now I need that my program will use configuration file.so, I need that my Java class will read it at the first time but the default path of java to read and write files is c:program filesFlex Builder 3 and not my application directory inside the tomcat webapps directory How can I read the config file from the java class without write the path hardcoded in the java?
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Feb 22, 2012
I'm trying to use RemoteObject from ActionScript to execute simple method on Java server side using GraniteDS. However, I'm getting this exception:
[code]...
I made some debug and monitoring, and I could see the AMF message the client sent. And it looked normally. However AMF0Deserializer can't deserialize it.Am I sending it wrong? Or there should be an error on the server side?
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Jan 17, 2010
Flash + AMFPHP is a great combination. But there are cases, when Flash Remoting with NetConnection isn't the right tool, for various reasons. Rob had a great post on this some time ago: http:[url]....He also has a nice example on how to deliver AMF to a http request, without the POST and AMF-request package to call the function that NetConnection sends, using Zend_AMF.
// Include the Zend Loader
include_once 'Zend/Loader.php';
// Tell the Zend Loader to autoload any classes we need[code].....
I really like this approach and would be very hapy to replicate it with AMFPHP. Why AMFPHP, you ask? The 'newest' version uses amf-ext, a C PHP extension, to serialize and deserialize the data. It is much faster than the php way ZendAMF is still using.Of course I already played around with AMFPHP and tried to build the necessary objects and use the Serializer class. I even got a valid AMF string, but the real data was always wrapped by a 'method package' that told the receiver this was a answer to 'Service.method' call.is there a way to serialize Flash Objects directly, without the gateway and method wrapper, in AMFPHP?
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Feb 7, 2012
I have a project that I need to develop some Java code for. The project is using Flash and BlazeDS. For the initial build of the project, an Ant script is run that eventually runs what I believe is the Flex compiler (the sdk attribute points to a FlashBuilder 4 sdk/4.1.0 directory).
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Sep 10, 2010
I get this error starting up Flash Professional CS5. I don't even have to create/open a Flash file. I already re-installed, but to no avail.
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May 14, 2010
I'm trying to run ASDoc on just one of my classes, but I keep getting the following:
ActionScript Code:
Error: Cannot find JRE.
Error: Cannot find Java 2 Runtime Environment.
I've read up on the issue and I tried setting up the JAVA_HOME environment variable to point to ..AdobeFlex Builder 3jre folder but it's not working at all. Is there a compatibility issue or is something else going wrong?
/edit: Nevermind, it just started working. I guess I had to exit out of command prompt before it took effect
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Jul 15, 2010
i got a .fla file about 2xx mb (contain number of actionscript and layers) on another using Flash CS3 Professional and i use it ( Flash CS3 Professional) too ,
i can open the fla successfully , but when i try to export the fla to the swf
it appear the message : "Error initializing Java Runtime Environment , You may need to reinstall Flash."
result : the swf is gen but the frames move "non-stop" automatically
i had tried use different OS (winXP , Win7 ) and JRE
[Code]...
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Jan 9, 2011
I'm currently on a Windows 7 64bits system and I've got this unsolved problem of "Error initializing Java Runtime Environment. You may need to reinstall Flash" pop-up at Flash CS5 launch. This error (apparently relied to AS3 compiling machine) also appears during SWF compilation (so the compilation is bugged and the SWF is unusable) I've googled it and tried every piece of answer but none of them worked :
- Re-install Flash or Java (32 & 64 bits)
- Delete CLASSPATH in environment variables
- Reduce (or raise ?!) -Xmx128M environment variable
- Launch application with XP SP3 compatibility
Is anyone here had the same problem and succeed to pass through in any kind of way
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Sep 25, 2010
Are there any differences implementing Flex application security in a clustered Java environment (such as Oracle Application Server/OC4J or a JBoss cluster) vs a single application server environment? (And/or does it depend on the specific environment software?)
What considerations are there in a situation where you need to authenticate with LDAP (AD) and store user access information in a database (ex. USER table containing username + permissions/roles info)? Any differences between Blaze DS and Granite DS?
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Feb 9, 2009
When I apply a 3D tween I get the following error when I test the movie: Error initializing Java Runtime Environment. You may need to re-install Flash If I remove the tween, no error on testing. Is this a bug? I am using CS4 on a brand new Dell M6300 mobile workstation.
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Jun 19, 2009
I'm using BlazeDS 3 in my application. The dependencies for the BlazeDS libraries are downloaded from a public maven repository. However I can't enable the RDS support on the server because of some missing library. Does anyone know where this class is located: flex.rds.server.servlet.FrontEndServlet.
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Oct 22, 2009
I have a BlazeDS destination and the scope is set to request. Is there a way to get BlazeDS to call destroy() when the request is complete? Is there another way to know when the request is complete?
I know I can use finalize(), but that is only called when garbage collection occurs.
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Mar 18, 2010
has anybody tried using a custom classloader with BlazeDS? We have a web application using BlazeDS and we can convert Java objects in to ActionScript object and back without problems in the main application. However, we also have a plug-in mechanism based on a custom classloader.BlazeDS cannot map the types contained in jar files of that custom classloader since I don't know how to tell it to BlazeDS.The livedocs of TypeMarshallingcontext show a setClassloader() method, but since the context seems to be a singleton, I assume this will not work if you have multiple custom classloaders (we have 1 for each plugin that is deployed
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May 20, 2011
My name is Rahul.I am new to flex. I am trying to integrate flex with blazeds using java. I have written some code as per my knowledge. But it is not connecting to database. I am pasting my code here.Please look into this and let me know if i have done any mistakes over there:
[Code...
If i try to execute the Feedback.mxml then i am getting "Sorry your feedback is not entered" as output.I dont know where the problem is.I think flex is connected successfully but problem is in java code.
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Nov 9, 2011
I am using blazeDS remote object. I need to get a client ip address from clien request. Is it any way to get ip address and system information in blazeDS java.
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Mar 16, 2012
I'm starting a flex+blazeds project. First I coded some server classes, and modified xmls (in WEB-INF). Now I want to test it with client. There (in Flash Builder) it's needed to specify path to folder where server lives. The problem is that I cannot find it. In the same time [URL] is found in browser.
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Aug 14, 2009
I using messaging in Flex-BlazeDS. When the AIR client starts it connects to a destination and a specific subtopic. During runtime, the user can use a combo box to subscribe to different sets of live data coming in, this combo box change event changes the subtopic by:
messagingConsumer.subtopic = subtopicComboBox.selectedLabel;
messagingProducer.subtopic = subtopicComboBox.selectedLabel;
messagingConsumer.subscribe();
A message is then sent to the server with the new subtopic name as well so the server knows to send to a new subtopic. This whole mechanism seems very glitchy and I'm wondering if anyone else has tried this and succeeded? Most times it works the first time and the after that either the messages dont get sent or I get server errors like:
[BlazeDS]Endpoint with id 'my-streaming-amf' cannot service the streaming request as either the supplied FlexClient id 'B07F3285-A408-816E-4697-F13F9B17E32C is not valid, or the FlexClient with that id is not valid.
Also sometimes when I change subtopics it will cause the FlexSession and FlexClient to be destroyed instead of just the MessageClient. Once that FlexSession gets destroyed it messes up all kinds of things including logging out the user.
Perhaps I'm over complicating things by changing subtopics to listen to different sets of live data, if anyone has any other ideas on how to accomplish dynamic changing of destinations or subtopics please list those as well.
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