gwt-rpc | 易学教程

call ejb remote

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问题 Is it possible to access an EJB remote interface method from a GWT client module write with RPC? The gwt application is on an server with Tomcat and the EJB is deployed in a Jboss server. If is it possibile, where i can find example code? 回答1: The tutorial you've provided looks fine, and though it's for a command line app, the same concept should work for an application deployed on Tomcat. What problems have you found with it? Here you've a simpler example: let's suppose you've an EJB with

GWT RPC: DTO vs. DAO?

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问题 I've started learning GWT about a week ago and here's the question I can't answer for sure. Here's the server-side: // business object - has logic interface Article { String getTitle(); // lazy void setTitle(); String getText(); // lazy void setText(); Set<Comment> getComments(); // lazy } // also has logic interface Comment { ... } I need to somehow create a GWT widget to visualize Article . Passing Article won't work, since it's not serializable and moreover, it has some BL. So, there are 2

com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException

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问题 I have a problem with my GWT application. I deploy on Jetty server and it runs. But when I perform a server call (class on server package of GWT), the server returns an error message. The message is: 7|0|6|http://localhost/zbapp/zb_app/|A31E1254E17F9AD731856D6BE34124A2|main.java.com.gwt.app.client.GreetingService|greetServer|java.lang.String/2004016611||1|2|3|4|2|5|5|6|6| //EX[2,1,["com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException/3936916533","This application is out of date,

Is there a Flex equivalent of GWT-RPC?

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问题 Right now a lot of my applications use GWT-RPC for retrieving POJO's from a GWT RemoteService which in turn calls a Web Service (SOAP) to get the data. I am evaluating Flex and didn't really see anything truly analogous to this simple architecture. Anything I may have missed? 回答1: AMF is Adobe's compact binary message format for use in Flash / Flex applications. BlazeDS is the open source reference implementation for Java, using essentially nothing more than a simple "message broker" servlet

Memory usage of a GWT application

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问题 I'm currently working on a GWT application as a proof of technology for future projects. I like the way of building my AJAX code in Java instead of JavaScript. But I seem to be running into a memory problem when I repeat calls to an RPC service. The browser memory usage keeps growing and growing. When searching Google I keep reading about how great GWT is and that its impossible to get memory leaks so can anyone explain why my browser (Firefox and Chromium) memory is rocketing? Thanks in

Getting com.google.gwt.user.client.rpc.StatusCodeException: 0 in GWT

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问题 I sometimes/often get this Exception in GWT but don't know why: SEVERE: com.google.gwt.user.client.rpc.StatusCodeException: 0 java.lang.RuntimeException: com.google.gwt.user.client.rpc.StatusCodeException: 0 at Unknown.java_lang_RuntimeException_RuntimeException__Ljava_lang_Throwable_2V(Unknown Source) at Unknown.de_ctech24_simplynews_web_client_util_SimpleCallback_$onFailure__Lde_ctech24_simplynews_web_client_util_SimpleCallback_2Ljava_lang_Throwable_2V(Unknown Source) at Unknown.com_google

GWT make RPC blocking

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Is it possible to make a gwt rpc blocking? i.e. the application blocks until a response is received from the server As far as I know there is no gwt rpc blocking because it is opposite idea to the asynchronous callback. But you can use these two methods Timer. Count timer and check that there is any return object that is not null and stop and cancel timer and continue your job. If timer is active don't do other job. This is very very inefficient way. Lack of OO design pattern and too many if-else-if statements Call Rpc and do all actions in onSuccess() method. It guarantees that your method is

spring using CGLIB proxy even when class implements interface

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问题 I'm trying to use Spring AOP to intercept methods of my GWT-RPC application (using GWT-Server library, so RPC service doesn't extend RemoteServiceServlet). When I deploy my war to tomcat and start the application, CGLIB fails for some reason. But I don't understand why CGLIB is being used for proxying at the first place. Since my RPC class implements the interface, shouldn't it be using JDK dynamic proxies? Is there anything I need to do to debug this issue? Kindly advise. Note: FYI, Spring

GWT RPC or Request Builder using Javascript Overlay?

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问题 GWT RPC is a mechanism provided by gwt to communicate between client and server. Also there's a Request Builder, through which you can connect to the server. Which mechanism would you recommend for a gwt based app, and please state the reasons to do so as well.. 回答1: I'd think GWT RPC is most likely the way to go. I might be wrong about this, but I believe the gwt RPC solution is built on top of RequestBuilder. It adds functionality on top of RequestBuilder such as automatic serialization of

GWT make RPC blocking

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问题 Is it possible to make a gwt rpc blocking? i.e. the application blocks until a response is received from the server 回答1: As far as I know there is no gwt rpc blocking because it is opposite idea to the asynchronous callback. But you can use these two methods Timer. Count timer and check that there is any return object that is not null and stop and cancel timer and continue your job. If timer is active don't do other job. This is very very inefficient way. Lack of OO design pattern and too