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Sample
by Pushpa
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I am new to DWR.
I have written a sample that calls a java method HTML page <html> <head> <title></title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <script type='text/javascript' src='../tabs/tabs.js'> </script> <script type='text/javascript' src='../dwr/engine.js'> </script> <script type='text/javascript' src='../dwr/util.js'> </script> <script type='text/javascript' src='../dwr/interface/Demo.js'> </script> <script type="text/javascript" src='../js/mytext.js'> </script> <link rel="stylesheet" type="text/css" href="../tabs/tabs.css" /> <link rel="stylesheet" type="text/css" href="../generic.css" /> </head> <body onload="dwr.util.useLoadingMessage();dwr.engine.setActiveReverseAjax(true);"> <input type="text" name="myName" value=""> <input type="button" value="Greet!!" onclick="greet();"><br> Reply: </body> </html> mytext.js function greet(){ var name = dwr.util.getValue("myName"); SimpleText.sayHello(name, function(data){ dwr.util.setValue("greetReply", data); }); } SimpleText.java package org.mydwr.examples.text; /** * * @author Pushpa */ public class SimpleText { /** * Return a server side string to display on the client in real time * @param name The name of person to say hello to * @return A demo string */ public String sayHello(String name) { return "Hello, " + name; } } dwr.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd"> <dwr> <allow> <create creator="new" javascript="SimpleText"> </create> </allow> </dwr> web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="dwr"> <servlet> <servlet-name>dwr-invoker</servlet-name> <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class> <init-param> <param-name>debug</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>pollAndCometEnabled</param-name> <param-value>true</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dwr-invoker</servlet-name> <url-pattern>/dwr/*</url-pattern> </servlet-mapping> <session-config> <session-timeout> 30 </session-timeout> </session-config> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app> When i run this , the SimpleText class is not recognised in the JS file. Can anyone tell me what is wrong with my code ?? |
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Re: Sample
by David Marginian-2
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You need to include the interface file:
<script type='text/javascript' src='../dwr/interface/SimpleText.js/> Pushpa wrote: > I am new to DWR. > > I have written a sample that calls a java method > > HTML page > > <html> > <head> > <title></title> > <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> > <script type='text/javascript' src='../tabs/tabs.js'> </script> > <script type='text/javascript' src='../dwr/engine.js'> </script> > <script type='text/javascript' src='../dwr/util.js'> </script> > <script type='text/javascript' src='../dwr/interface/Demo.js'> > </script> > <script type="text/javascript" src='../js/mytext.js'> </script> > <link rel="stylesheet" type="text/css" href="../tabs/tabs.css" /> > <link rel="stylesheet" type="text/css" href="../generic.css" /> > > </head> > <body > onload="dwr.util.useLoadingMessage();dwr.engine.setActiveReverseAjax(true);"> > <input type="text" name="myName" value=""> > <input type="button" value="Greet!!" onclick="greet();"><br> > Reply: > > </body> > </html> > > > mytext.js > > function greet(){ > var name = dwr.util.getValue("myName"); > SimpleText.sayHello(name, function(data){ > dwr.util.setValue("greetReply", data); > }); > } > > SimpleText.java > > package org.mydwr.examples.text; > > /** > * > * @author Pushpa > */ > public class SimpleText > { > /** > * Return a server side string to display on the client in real time > * @param name The name of person to say hello to > * @return A demo string > */ > public String sayHello(String name) > { > return "Hello, " + name; > } > } > > > dwr.xml > > <?xml version="1.0" encoding="UTF-8"?> > <!DOCTYPE dwr PUBLIC > "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" > "http://getahead.org/dwr/dwr20.dtd"> > > <dwr> > <allow> > <create creator="new" javascript="SimpleText"> > > </create> > </allow> > </dwr> > > > web.xml > > <?xml version="1.0" encoding="UTF-8"?> > <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" > xsi:schemaLocation="http://java.sun.com/xml/ns/javaee > http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="dwr"> > <servlet> > <servlet-name>dwr-invoker</servlet-name> > <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class> > <init-param> > <param-name>debug</param-name> > <param-value>true</param-value> > </init-param> > <init-param> > <param-name>pollAndCometEnabled</param-name> > <param-value>true</param-value> > </init-param> > <load-on-startup>1</load-on-startup> > </servlet> > <servlet-mapping> > <servlet-name>dwr-invoker</servlet-name> > <url-pattern>/dwr/*</url-pattern> > </servlet-mapping> > <session-config> > <session-timeout> > 30 > </session-timeout> > </session-config> > <welcome-file-list> > <welcome-file>index.jsp</welcome-file> > </welcome-file-list> > </web-app> > > > When i run this , the SimpleText class is not recognised in the JS file. > > Can anyone tell me what is wrong with my code ?? > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: Sample
by Pushpa
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It worked .... thanks a lot.
After reading about DWR, i understood that DWR is used to call the java methods from javascript. Is there anything else that we can do using DWR ?? Can you please tell me where can i find good examples ??
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Re: Sample
by David Marginian-2
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There are many examples in the war file. Download the war and go
through the examples. There is also a lot of information on the website. Pushpa wrote: > It worked .... thanks a lot. > > After reading about DWR, i understood that DWR is used to call the java > methods from javascript. Is there anything else that we can do using DWR ?? > Can you please tell me where can i find good examples ?? > > > > > > You need to include the interface file: > > <script type='text/javascript' src='../dwr/interface/SimpleText.js/> > > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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