Easy ActionScript - helper Class for everyone

I have put together a number of methods that help do common tasks in ActionScript 3 in an easier way.
Providing powerful flexibility and consistency in AS3 is amazing but we have all probably grumbled at the steps involved in setting a color, a volume, a URL, getting a random number between two numbers, applying a font via code, accessing server data and XML, etc. Easy ActionScript lets you do these in a line or two using static methods of the Easy class.
http://easyactionscript.wordpress.com/
The code is helpful for beginners and even time saving for advanced coders.
Please let others know if you think it will be helpful. Also, leave a comment on the blog if you have any additional requests or suggestions.
Thanks,
Dan Zen

Thanks for the question. It adds about 3K. I can't imagine there would be any speed difference. It is just calling the same methods that you would call but one method removed ;-)

Similar Messages

I need a clarification : Can I use EJBs instead of helper classes for better performance and less network traffic?

My application was designed based on MVC Architecture. But I made some changes to HMV base on my requirements. Servlet invoke helper classes, helper class uses EJBs to communicate with the database. Jsps also uses EJBs to backtrack the results.
I have two EJBs(Stateless), one Servlet, nearly 70 helperclasses, and nearly 800 jsps. Servlet acts as Controler and all database transactions done through EJBs only. Helper classes are having business logic. Based on the request relevant helper classed is invoked by the Servlet, and all database transactions are done through EJBs. Session scope is 'Page' only.
Now I am planning to use EJBs(for business logic) instead on Helper Classes. But before going to do that I need some clarification regarding Network traffic and for better usage of Container resources.
Please suggest me which method (is Helper classes or Using EJBs) is perferable
1) to get better performance and.
2) for less network traffic
3) for better container resource utilization
I thought if I use EJBs, then the network traffic will increase. Because every time it make a remote call to EJBs.
Please give detailed explanation.
thank you,
sudheer

<i>Please suggest me which method (is Helper classes or Using EJBs) is perferable :
1) to get better performance</i>
EJB's have quite a lot of overhead associated with them to support transactions and remoteability. A non-EJB helper class will almost always outperform an EJB. Often considerably. If you plan on making your 70 helper classes EJB's you should expect to see a dramatic decrease in maximum throughput.
<i>2) for less network traffic</i>
There should be no difference. Both architectures will probably make the exact same JDBC calls from the RDBMS's perspective. And since the EJB's and JSP's are co-located there won't be any other additional overhead there either. (You are co-locating your JSP's and EJB's, aren't you?)
<i>3) for better container resource utilization</i>
Again, the EJB version will consume a lot more container resources.

Actionscript help needed for website

Hey everyone,
I am just beginning to learn the basics of creating web sites in flash. I posted this in site design a while ago, but no one has responded yet and I need help asap.
I have been following a tutorial and have it done pretty well, but they only cover one main button, and I am at the point where I need several more, but I am doing something wrong.
The tutorial is at this page: http://www.flash-game-design.com/flash-tutorials/advancedWebsite-flash-tutorial- 3.html
You can skip to the end and download the .fla if you want.
What I want to do specifically is to add probably 4 other main buttons that can also have drop down menus. Please be as specific as possible because the extent of my code knowledge isn't very far.
Thanks in advance
The code for the main page is as follows:
menu = ["About", "Bio", "Contact"];
this.createEmptyMovieClip("content", 1000);
this.attachMovie("sectionBackground","mask",1001);
mask._y = content._y=208;
mask._x = target=68;
content.setMask(mask);
content._x = -1000;
imageScrollSpeed = 5;
xStart = 125;
yStart = 51;
bWidth = 79;
bHeight = 17;
interval = 50;
countDown = menu.length;
menuOpen = false;
theTime = 0;
buttonScrollSpeed = 2;
for (var i = 0; i<menu.length; i++) {
var section = content.attachMovie("section_"+menu[i], "section_"+menu[i], i+100);
section._x = section._width*i;
var b = this.attachMovie("subButton", "subButton"+i, countDown);
countDown--;
b.stop();
b._x = xStart;
b._y = ySwtart;
b.interval = interval*i;
b.target = yStart+(bHeight*i);
b.txt = menu[i];
b.pos = target+(i*-section._width);
b.onPress = function() {
target = this.pos;
closeMenu();
this.gotoAndStop(1);
b.onRollOver = function() {
this.gotoAndStop(2);
b.onRollOut = function() {
this.gotoAndStop(1);
b._visible = false;
function closeMenu() {
for (var i = 0; i<menu.length; i++) {
var b = this["subButton"+i];
b._visible = false;
b._x = xStart;
b._y = yStart;
menuOpen = false;
mainButton.onPress = function() {
if (!menuOpen) {
theTime = getTimer();
menuOpen = true;
for (var i = 0; i<menu.length; i++) {
   _root.main["subButton"+i]._visible = true;
} else {
closeMenu();
mainButtoncopy.onPress = function() {
if (!menuOpen) {
theTime = getTimer();
menuOpen = true;
for (var i = 0; i<menu.length; i++) {
   _root.main["subButton"+i]._visible = true;
} else {
closeMenu();
function scrollButtons() {
if (menuOpen) {
for (var i = 0; i<menu.length; i++) {
   var b = this["subButton"+i];
   if ((theTime+b.interval)<getTimer()) {
    b._y += (b.target-b._y)/buttonScrollSpeed;
this.onEnterFrame = function() {
content._x += (target-content._x)/imageScrollSpeed;
scrollButtons();

That's all AS2 code, so you'll be beter off posting in the AS2 forum.

What's the naming convention for Helper Class?

Hi Experts,
What's the naming convention for helper class?
cl_util? or cl_heper?
Thanks in advance!

Hi.,
Normally in JAVA the naming convention for Helper Class is <EventID>Util.java. The Naming convention for helper class must start with EventID.
here Event ID is the event Name , Util.java is the helper class for java.
I believe the same will be followed in ABAP OO too..
here the helper class is cl_uitl.,
so <EventID><ABAP hepler class> is the naming convention.
wait for experts reply..,
hope this helps u.,
Thanks & Regards,
Kiran

Java Error in RFC Lookup in XSLT Mapping usinf Java helper class

Hi All,
I am doing RFC Lookup in XSLT Mapping using Java Helper class.
The Lookup works fine when called one RFC at a time However my requirement is I want to do 2 Lookups.
Both Lookups works when done individually however when I call both lookups in one mapping I get following error "javax.xml.transform.TransformerException: DOMSource whose Node is null."
Following is the code I have written in XSLT for the lookup:
     <xsl:template name="Lookup_1">
          <xsl:param name="STDPN"/>
               <rfc:RFC_READ_TABLE>
                    <QUERY_TABLE>KNA1</QUERY_TABLE>
                    <OPTIONS><item><TEXT>
                              <xsl:value-of select="$STDPN"/>
                         </TEXT></item>
                    </OPTIONS>
                    <FIELDS>
                         <item>
                              <FIELDNAME>KUNNR</FIELDNAME>
                         </item>
                    </FIELDS>
               </rfc:RFC_READ_TABLE>
          </xsl:variable>
          <xsl:variable name="response" xmlns:lookup="java:urn.mt.pi" select="lookup:execute($request, 'BS_D, 'cc_RfcLookup', $inputparam)"/>
          <xsl:element name="STDPN">
               <xsl:value-of select="$response//DATA/item/WA"/>
          </xsl:element>
     </xsl:template>
     <xsl:template name="Lookup_2">
          <xsl:param name="BELNR"/>
               <xsl:variable name="Query">AGMNT = '<xsl:value-of select="$BELNR"/>'</xsl:variable>
               <xsl:variable name="request1">
                    <rfc:RFC_READ_TABLE>
                         <QUERY_TABLE>ZTABLE</QUERY_TABLE>
                         <OPTIONS><item><TEXT>
                              <xsl:value-of select="$Query"/>
                              </TEXT></item>
                         </OPTIONS>
                         <FIELDS>
                              <item>
                                   <FIELDNAME>KUNAG</FIELDNAME>
                              </item>
                         </FIELDS>
                    </rfc:RFC_READ_TABLE>
               </xsl:variable>
               <xsl:variable name="response1" xmlns:lookup="java:urn.mt.pi" select="lookup:execute($request1, 'BS_D','cc_RfcLookup', $inputparam)"/>
               <xsl:element name="BELNR">
                    <xsl:value-of select="$response1//DATA/item/WA"/>
               </xsl:element>
     </xsl:template>
My Question: Am I doing anything wrong? Or Is it possible to call multiple lookups in one XSLT?
Thanks and Regards,
Atul

Hi Atul,
I had the same problem like you had.
The main Problem is that with the example code the request variable is created as NodeList object. In XSLT a variable is somekind of a constant and can't be changed. As the request object is empty after the first request the programm fails at the following line:
Source source = new DOMSource(request.item(0));
So I've created a workaround for this problem.
In the call of the template I've put the request as a parameter object at the template call:
<xsl:with-param name="req">
<rfc:PLM_EXPLORE_BILL_OF_MATERIAL xmlns:rfc="urn:sap-com:document:sap:rfc:functions">
<APPLICATION>Z001</APPLICATION>
<FLAG_NEW_EXPLOSION>X</FLAG_NEW_EXPLOSION>
<MATERIALNUMBER><xsl:value-of select="value"/></MATERIALNUMBER>
<PLANT>FSD0</PLANT>
<VALIDFROM><xsl:value-of select="//Recordset/Row[name='DTM-031']/value"/></VALIDFROM>
<BOMITEM_DATA/>
</rfc:PLM_EXPLORE_BILL_OF_MATERIAL>
</xsl:with-param>
With this change the request will be provided as a String object and not as a NodeList object.
Afterwards the RfcLookup.java has to be changed to the following:
package com.franke.mappings;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import com.sap.aii.mapping.lookup.Channel;
import com.sap.aii.mapping.api.StreamTransformationConstants;
import com.sap.aii.mapping.api.AbstractTrace;
import com.sap.aii.mapping.lookup.RfcAccessor;
import com.sap.aii.mapping.lookup.LookupService;
import com.sap.aii.mapping.lookup.XmlPayload;
* @author Thorsten Nordholm Søbirk, AppliCon A/S
* Helper class for using the XI Lookup API with XSLT mappings for calling RFCs.
* The class is generic in that it can be used to call any remote-enabled
* function module in R/3. Generation of the XML request document and parsing of
* the XML response is left to the stylesheet, where this can be done in a very
* natural manner.
* TD:
* Changed the class that request is sent as String, because of IndexOutOfBound-exception
* When sending multiple requests in one XSLT mapping.
public class RfcLookup {
     * Execute RFC lookup.
     * @param request RFC request - TD: changed to String
     * @param service name of service
     * @param channelName name of communication channel
     * @param inputParam mapping parameters
     * @return Node containing RFC response
     public static Node execute( String request,
             String service,
             String channelName,
             Map inputParam)
          AbstractTrace trace = (AbstractTrace) inputParam.get(StreamTransformationConstants.MAPPING_TRACE);
          Node responseNode = null;
          try {
              // Get channel and accessor
              Channel channel = LookupService.getChannel(service, channelName);
              RfcAccessor accessor = LookupService.getRfcAccessor(channel);
               // Serialise request NodeList - TD: Not needed anymore as request is String
               /*TransformerFactory factory = TransformerFactory.newInstance();
               Transformer transformer = factory.newTransformer();
               Source source = new DOMSource(request.item(0));
               ByteArrayOutputStream baos = new ByteArrayOutputStream();
               StreamResult streamResult = new StreamResult(baos);
               transformer.transform(source, streamResult);*/
                // TD: Add xml header and remove linefeeds for the request string
                request = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"+request.replaceAll("[\r\n]+", "");
                // TD: Get byte Array from request String to send afterwards
                byte[] requestBytes = request.getBytes();
               // TD: Not used anymore as request is String
                //byte[] requestBytes = baos.toByteArray();
                trace.addDebugMessage("RFC Request: " + new String(requestBytes));
                // Create input stream representing the function module request message
                InputStream inputStream = new ByteArrayInputStream(requestBytes);
                // Create XmlPayload
                XmlPayload requestPayload =LookupService.getXmlPayload(inputStream);
                // Execute lookup
                XmlPayload responsePayload = accessor.call(requestPayload);
                InputStream responseStream = responsePayload.getContent();
                TeeInputStream tee = new TeeInputStream(responseStream);
                // Create DOM tree for response
                DocumentBuilder docBuilder =DocumentBuilderFactory.newInstance().newDocumentBuilder();
                Document document = docBuilder.parse(tee);
                trace.addDebugMessage("RFC Response: " + tee.getStringContent());
                responseNode = document.getFirstChild();
          } catch (Throwable t) {
               StringWriter sw = new StringWriter();
               t.printStackTrace(new PrintWriter(sw));
               trace.addWarning(sw.toString());
          return responseNode;
     * Helper class which collects stream input while reading.
     static class TeeInputStream extends InputStream {
           private ByteArrayOutputStream baos;
           private InputStream wrappedInputStream;
           TeeInputStream(InputStream inputStream) {
                baos = new ByteArrayOutputStream();
                wrappedInputStream = inputStream;
           * @return stream content as String
           String getStringContent() {
                return baos.toString();
          /* (non-Javadoc)
          * @see java.io.InputStream#read()
          public int read() throws IOException {
               int r = wrappedInputStream.read();
               baos.write(r);
               return r;
Then you need to compile and upload this class and it should work.
I hope that this helps you.
Best regards
Till

Code Sample: Easy RFC Lookup From XSLT Mappings Using a Java Helper Class

Hi everyone,
This is just a shameless plug for my article: <a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/05a3d62e-0a01-0010-14bc-adc8efd4ee14">Easy RFC Lookup From XSLT Mappings Using a Java Helper Class</a>. I hope you're interested in reading it, and I welcome your comments in this thread.
Kind regards,
Thorsten

Hi Stefan. Thanks for your post. I have already done that. It still does not work. As a base for my java helper class I have usesd Thorstens code.
The problem is quite confusing. I will try to ouline both issues here.
First of all, when try to test from within the Operation Mapping, I always get a java error saying it cannot find the communication channel (it is there and working because I have tested it with the RFCLookup in graphical mapping). I have found a way to work around this, and that is to uncheck the "Use SAP XMLToolkit" checkbox --> switch to test tab, enter my ReceiverService in the parameter tab (header parameter) --> switch back to Definition tab, check the "Use SAP XMLToolkit" checkbox --> switch to Test tab and run the test. Then the XSLT and call to java helper class will work. Of course this is not really something you want to do all the time. Maybe there is a bug.
Secondly, it never works when I try to do it "live". I am using a file adapter to pick up one file, convert it and a file adapter to drop the converted file. I get the following error code in SXMB_MONI.
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

<SAP:Error xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="">
<SAP:Category>Application</SAP:Category>
<SAP:Code area="MAPPING">TRANSFORMER_CONF_EX</SAP:Code>
<SAP:P1>ATJ_Accounting2XML_Accounting.xsl</SAP:P1>
<SAP:P2>http://rd.accounting.logica.com</SAP:P2>
<SAP:P3>fd552c30-bad9-11dd-9761-c21dac1b818c</SAP:P3>
<SAP:P4>-1</SAP:P4>
<SAP:AdditionalText />
<SAP:Stack>TransformerConfigurationException triggered while loading XSLT mapping ATJ_Accounting2XML_Accounting.xsl; http://rd.accounting.logica.comfd552c30-bad9-11dd-9761-c21dac1b818c-1</SAP:Stack>
<SAP:Retry>M</SAP:Retry>
</SAP:Error>
Using an XSLT without a call to a java helper class, works just fine.
I am totally at a loss here. Any more input would be much appreciated.
/Patrik

How to construct table in jsp for the resultset from helper class

Hi Dudes!!!
Want to construct table in jsp for the resultset, but the resultset are retrieved at the helper class.I constructed Table in Helper class Using StringBuffer and return it as string from the helper class.Is their any other feasible and efficient way to construct table in Jsp for the resultset from Helper class.Solution will be highly appreciated.Thanx in Advance.

no, we can't.
Certainly noone can with such vague specifications even if they had the intent to do so.
"the computer", which computer?
"attach to our current page", what is meant by that?
And noone should ever help you if you're planning to breach security anywhere.

Unable to compile class for JSP--- help me plz!!!!!

hi friends;
Pease suggest me where i am wrong, i think javabean is not instantiated in jsp file.may be it is related to the classpath of javabean. i have not set any variable for javabean classpath. and i put javabean class file in
TOMCAT_HOME/webapps/test3/WEB-INF/UseDta.class
and all the jsp and html in /test3. my jsp an javabeans are--
1. GetName.html
<HTML>
<BODY>
<FORM METHOD=POST ACTION="SaveName.jsp">
What's your name? <INPUT TYPE=TEXT NAME=username SIZE=20><BR>
What's your e-mail address? <INPUT TYPE=TEXT NAME=email SIZE=20><BR>
What's your age? <INPUT TYPE=TEXT NAME=age SIZE=4>
<P><INPUT TYPE=SUBMIT>
</FORM>
</BODY>
</HTML>
2. SaveName.jsp
<jsp:useBean id="user" class="UserData" scope="session">
<jsp:setProperty name="user" property="*"/>
</jsp:useBean>
<HTML>
<BODY>
Continue
</BODY>
</HTML>
3. UserData.java
public class UserData {
String username;
String email;
int age;
public UserData(){}
public void setUsername( String value )
username = value;
public void setEmail( String value )
email = value;
public void setAge( int value )
age = value;
public String getUsername() { return username; }
public String getEmail() { return email; }
public int getAge() { return age; }
4. NextPage.jsp
<jsp:useBean id="user" class="UserData" scope="session"/>
<HTML>
<BODY>
You entered<BR>
Name: <%= user.getUsername() %><BR>
Email: <%= user.getEmail() %><BR>
Age: <%= user.getAge() %><BR>
</BODY>
</HTML>
url: http://localhost:8080/test3/GetName.html
is it related to context path??
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 2 in the jsp file: /SaveName.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\test3\org\apache\jsp\SaveName_jsp.java:44: cannot find symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
UserData user = null;
^
An error occurred at line: 2 in the jsp file: /SaveName.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\test3\org\apache\jsp\SaveName_jsp.java:46: cannot find symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
user = (UserData) jspxpage_context.getAttribute("user", PageContext.SESSION_SCOPE);
^
An error occurred at line: 2 in the jsp file: /SaveName.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\test3\org\apache\jsp\SaveName_jsp.java:48: cannot find symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
user = new UserData();
^
3 errors
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:437)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:497)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:476)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:464)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.30 logs.
Apache Tomcat/5.0.30
please Reply me ASAP
i'll be glad if you reply. please

I am using Tomcat 6.0.
I have put my UserData class in user package and
used in below jsp(SaveName.jsp)
<%@ page import="user.UserData" %>
<jsp:useBean id="user" class="user.UserData" scope="session"/>
<jsp:setProperty name="user" property="*"/>
<HTML>
<BODY>
Continue
</BODY>
</HTML>
I have already set my classpath as C:\Documents and Settings\user\My Documents\Java\apache-tomcat-6.0.16\apache-tomcat-6.0.16\webapps\ROOT\WEB-INF\classes;
UserData class is in C:\Documents and Settings\user\My Documents\Java\apache-tomcat-6.0.16\apache-tomcat-6.0.16\webapps\ROOT\WEB-INF\classes\user
My UserData class is
package user;
public class UserData {
String username;
String email;
int age;
     public UserData(){
          this("","",0);
          System.out.println("najn thanne puli");
     public UserData(String username,String email,int age){
          this.username=username;
          this.email=email;
          this.age=age;
public void setUsername( String value )
username = value;
public void setEmail( String value )
email = value;
public void setAge( int value )
age = value;
public String getUsername() { return username; }
public String getEmail() { return email; }
public int getAge() { return age; }
But running SaveName.jsp shows exception
org.apache.jasper.JasperException: /SaveName.jsp(2,0) The value for the useBean class attribute user.UserData is invalid.
     org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
     org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
     org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148)
     org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1200)
     org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1160)
     org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
     org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2393)
     org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2399)
     org.apache.jasper.compiler.Node$Root.accept(Node.java:489)
     org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
     org.apache.jasper.compiler.Generator.generate(Generator.java:3372)
     org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:294)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:281)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
Please help me.thanks in advance.

JasperException: Unable to compile class for JSP HELP

I added couple of extra class files into the jar file.. and now its not able to find it! I am running JBoss latest version and using eclipse... any help wud be nice
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
Only a type can be imported. org.jfree.chart.servlet.WebHitChart resolves to a package
Generated servlet error:
Only a type can be imported. org.jfree.chart.servlet.WebHitDataSet resolves to a package
An error occurred at line: 10 in the jsp file: /bar_chart.jsp
Generated servlet error:
WebHitChart cannot be resolved
An error occurred at line: 10 in the jsp file: /bar_chart.jsp
Generated servlet error:
WebHitDataSet cannot be resolved
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:397)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
     org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)

just a random guess...
I had a ton of issues with JBoss and jfreechart. JBoss uses a different classloader, and its internal versions of the jfreechart classes will be loaded before yours, causing all sorts of issues. Dig through the jboss directories and you'll find a different, older version of jfreechart of one of its classes. Remove them and you'll be in better shape.
Alternatively, look around the JBoss docs for how to disable/turn off the unified classloader for your app (its a directive in jboss-web.xml IIRC). This should make the classloader for your webapp perform to spec, getting rid of the class colission issues.

"Class" for Exporting for ActionScript not accessible

I am trying to export some audio files with Sound Properties > Export for ActionScript. However, for some reason the "Class" box is greyed out and unaccessible. I've tried out a number of different files: .mp3, .wav, .aif, but Class is still greyed out.
What is the problem? Is there some sort of workaround?

I just found out that the reason the reason why it was not editable is because the document has been set up for Actionscript 1.0 and 2.0, not 3.0. I tried to follow this video: http://www.youtube.com/watch?v=r5Ai4-j0bUc on how to export sound to actionscript.
I've been trying to find the Actionscript 1.0/2.0 version of that workflow to set up a sound, volume, play, frame range, play increment, etc. Is it essentially the same coding?
import flash.media.SoundTransform
import flash.media.SoundMixer
SoundMixer.stopAll()
// The section below imports the sound you just "Exported for Actionscript"
// Replace "sound" with the "Class" name you put in the ActionScript tab for the audio clip
// ** If there is more than one sound, then copy & paste the line below and rename the "sound1" and "sound" to each new audio.
// ** Do the same process with the ".play" line at the bottom of the program
var sound1 = new sound();
// Section below controls the audio volume. Range is between 0-1.
// Example: .5 >>>> 50% volume
var myvolume:SoundTransform = new SoundTransform(.5);
// Below controls the
// (<starting frame within audio track>, <frame increment or how fast the track plays>,<Connects to Volume - ignore it>)
sound1.play(0, 1, myvolume);

MacBook Pro says its connected to wifi but doesn't work(or goes super slow)when the wifi works for everyone else Help!

I have recently gotten a MacBook Pro (through my highschool so it is monitored by them) and ever since I brought it home it's been having wifi connection problems. It says the wifi is working fine, it shows full bars, but when I try to connect to the Internet it acts like there is only one bar or no bars. Although every one and a while I can get a great connection but it lasts for about 10 minutes. This I do not get because the wifi works perfectly fine for everyone else in the house and for our phones too. So if anyone else could help me I would be soo happy. Thanks.

I have had the same issue and searched the forums and found nothing that helped. I contacted apple support and this is what they told me to do:
First we’ll do the SMC reset
1.) Shut down the Mac and connect to power source.
2.) Unplug external devices, flash drives, external monitors, external HD (Keep the Mac plugged into power source)
3.) Hold down “Shift” + “Control” + “Option” (On the left side of the keyboard) + Power key for 30 seconds.
*The Mac should remain powered off during the reset, the LED on the MagSafe Adapter may change colors.
**The “Option” key is also known as the “Alt” key on some Macs.
Awesome, now let’s reset the NVRAM
1.) Locate these keys “Command”, “Option, “P” & “R”
2.) Power on your Mac
3.) Immediately press and hold all 4 keys “Command” “Option” “P” “R”
4.) Listen for 2 boot chimes and then release.
**The “Option” key is also known as the “Alt” key on some Macs.
Posting this here in the hopes that it will help someone else still searching for an answer.

Help!!!, android not support sound. how to fix? (useful for everyone)

if someone can show how fix sound in android, must useful for everyone.

Isn't this the same question asked in the thread below?
someone please, share tip. how to sound on android?
Click this link please and read the thread.
Thanks... Rick

Ideas or help needed for a simple, robust pluggable framework

Hi all,
Having written a fairly decent plugin engine, similar in concept to the Eclipse plugin engine, although at a more generic scale, I am looking for any possible ideas for a Java Swing framework that is built around the engine, with the concept of using a framework that is built on mostly plugins. My engine handles, or will soon handle, a number of features to make the engine robust enough, yet still easy enough, to use for just about any purpose.
The engine is pretty simple, although with a bit more work I feel will be overall a pretty robust and powerful plugin engine. Each plugin is made up of one or more "services". A plugin is a .jar file that contains a plugin-conf.xml config file, the classes that implement the Service interface, and any supporting classes. The "plugin" is really the package of one or more services and supporting classes. The engine will handle the ability to work with expanded dir structures as well, so that the build process doesn't have to create .jar files on every build of a plugin. The engine has built in support to load, unload and reload a plugin at runtime. This helps during development by allowing auto-reload of a plugin service without having to restart the app. The engine has the ability to "watch" URLs in a separate thread (still working on this), and at given intervals if a change occurs to any plugin, that plugin is reloaded. This is configurable on a per plugin basis in the config file.
Every plugin .jar file gets its own classloader instance. Because of the nature of a framework that may rely heavily on plugins, it will be very common to have plugin dependencies, where a plugin service may rely on one or more other plugin services. The dependencies are configured in the plugin-conf.xml file, and the engine resolves these when the plugin is loaded, automatically. Once all plugins have been loaded, an "init" call is made that then goes and resolves all plugin service dependencies, setting up the behind the scenes work to make sure any service can use any other service it defines to depend on. Another area is plugin versions. There will no doubt be a time when some sort of application may have legacy plugins, but also have newer plugins. For example, an application built on a "core" set of plugins, may eventually update the core plugins with newer versions. The engine allows the "old" plugins to exist and work while new versions of the same plugins may be loaded and working at the same time. This allows older plugins that depend on the old set of core plugins to work, while newer plugins that depend on the new core plugins may work also. Any plugin may depend on one or more services specified by specific versions, or a range of versions.
Plugin services can define to be created when first loaded, or lazy instantiated. Ideally, an application would opt for lazy instantiation until a plugin is needed. For example, a number of plugins may need to add menu items or buttons that would trigger its service. The plugin does not actually need to be created until the menu or button is clicked on. There is one BIG problem with how this engine works though. Unlike the Eclipse (and other) engines where the config file defines the menu item(s), buttons, etc in an xml sort of language, this engine is built for generic use, and therefore is not specific to menu items or buttons triggering a service instantiation. Therefore, a little "hack" is required. A specific plugin that is created when first loaded will be required to set up all the menu items for specific plugins, then handle the actionPerformed() call to instruct the engine to create the service. The next step would be for the plugin service to add its own handler to the specific menu item it depends on, and remove the "old" handler the startup plugin added to it to handle the initial click. Another thought just struck me though. Because the engine must use an XML parser to load every plugin-conf.xml file, it might be possible to "extend" the parsing routine, where by an extending class could be added to the engine to parse plugin-conf.xml files. First the plugin engines own routine would parse it. Then, the extending class could parse for any extra plugin-conf.xml info, such as menu item settings, and directly set up the menu items and handlers in this manner. I will probably include this ability directly in the engine soon anyway, so that nobody else has to do this, but this is one area I would appreciate some feedback on.
Anyway, so that is the jist of the engine. There is more to it under the hood, but that sums up a good part of it. Now, the pluggable framework, much like what the "shell" of eclipse, forte and so forth offer, is built around my engine to make it very easy to build Swing applications with a pluggable framework underneath. The idea is to package up a startup main class that is configurable, a number of useful plugins that other plugins could depend on, such as an Outlook layout, menuing, toolbars, drag/drop, history, undo/redo, macro record, open/save/search/find/replace dialogs, and so forth. This isn't just for an IDE though. The developer using the framework could deploy the basic app with the plugins of his/her choice, and add to it with his/her own plugins.
Soooo, after this long post, what I am getting at is if anyone would be interested in helping out with ideas, feedback, testing, core framework plugins, and so forth. At this time I am keeping the code closed, but will probably public domain it, open source it, or whatever. The finished framework should make it easy for anyone to quickly build useable applications, and if all goes well, I'd like to set up a site with a location for 3rd party plugins to be uploaded, for download, comments, etc. Being a web developer, I myself will probably work on some plugins for Web Services, web stress testing, and so forth. I have lots of ideas for useable plugins.
On that note, one application I am personally working on for my own use, is a simple yet possibly robust internet suite of apps. I want to incorporate FTP, Email, NewsGroup, and IRC/AOL IM/Yahoo IM/MSN IM/ICQ chat into a single app. Every aspect of it would be plugins. Frankly, I hate outlook, Eudora is alright, but I want to do some things with the email app. I also want a single IM/Chat app that can talk with all protocols (not an easy task, take a look at GAIM). Newsgroups are handy to work with for developers and others of interest, as is FTP. But even more so, being able to have all in one big application framework that allows them to share data between each other, work with one another, and so forth is appealing to me, and being written in Java it could potentially work on many platforms, giving some platforms a possible nice set of internet apps to use. Being able to send an email to a mailing list AND have it posted to specific newsgroups at the same time without having to copy/paste, open up separate applications and so forth has appeal. Directly emailing from any chat or newsgroup link without another app starting up is a little faster as well. Those are just "small" things that could prove to be very kewl in a complete internet app. Adding a web browser, well, I don't think I want to go that route. But if there is already a decent Java built web browser, it shouldn't be too hard to add it as a plugin.
So, if anyone is interested, by all means, drop a post to this thread, let me know of interest, feedback, ideas, point out bad things, and so forth. I appreciate all forms of communication.
Thanks.

Yes I do. I am using it now with my work related project.
I am in fact reworking the engine a bit now. I want to incorporate the notion of services (like OSGi) where by a plugin can register services. These services are "global" in scope, meaning any plugin may request the use of a service. However, services, unlike plugins, are not guaranteed to be available. Therefore, plugins using services must be coded to properly handle this possibility. As an example, imagine an email application using my engine. One plugin may provide the email gateway, including the javamail .jar library and provide the email service. Other plugins, such as the one that provides the functionality for the SEND button, would "use" this service. At runtime, when the send button was pressed it would ask the engine for the email service. If available, off goes the email. If not, it could pop up a dialog indicating some sort of message that the email service is not available.
I am at the VERY beginning stages in this direction so I'd love to have ideas, thoughts, suggestions as to how this might be implemented. I do believe though that it will provide for a more powerful engine. The nice thing is, while the engine will support static runtime plugins, it will also support dynamic services that can come and go during the runtime. The key is that plugins using services do not maintain references to them, but instead query the engine each time a plugin needs to use a service.
Static plugins are those that are guaranteed to be available or if not, any dependent plugin is not allowed to load. That is, if A depends on B and B is not able to be loaded, A is unloaded as well as it can't perform its job without B; it depends on B in some manner to complete its function. Imagine a plugin adding an option panel to the Preferences page only that the Preferences plugin is not loaded. It just can't work. However, with some work, there could be variations on this. That is, a plugin may provide a menu item as well as a preferences page. If the preference plugin is not available, then the plugin may simply still work via the menu item, but have no preferences panel available. This should be configurable via the plugin-conf.xml config file. However, as I have it now, using extension points and extensions like Eclipse does, it is also possible that if the Preferences plugin isn't loaded, it wont look for ANY extensions extending its extensino point, and therefore the plugins could all still run but there would simply be no preferences page. So, I am not entirely sure yet which way is best for this to work.
My engine, as it stands now, allows for separate classloader plugin loading, it automatically resolves all dependencies by creating the plugin registry each time the engine is started up. To speed up plugin loading, it maintains a plugins.xml file in the root dir that keeps track of each plugin that was loaded and its last timestamp. Plugins can be open directory files or jarred up into .PAR files (think .WAR or .EAR files). The engine can find .par or open-dir plugins in multiple locations (including URL locations for direct .par files). When it finds a .par file, it first decompresses the .par file to a plugin work directory. Every plugin must have a plugin-conf.xml in its root dir, and either a /classes dir where compiled classes are, or a .jar file in the root path of the plugin, where the /classes dir superscedes the .jar file. Alternatively, anything in a /lib dir is automatically picked up as part of the plugin classpath. So a plugin that wraps the xerces.jar file can simply place the xerces.jar in the /lib dir and automatically present the xerces library to all dependent plugins (which can import the xerces classes but not need to distribute the xerces.jar file if a plugin they depend on has it in its /lib dir). The "parent lookup" process goes only one parent level deep. That is, if plugin A depends on a class in a /lib/*.jar file in plugin B, then the engine will resolve the class (through delegation) of plugin B. But if A depends on B, B depends on C where plugin C's /lib/*.jar file contains a class A is looking to use, this will not work and A will throw a ClassNotFoundException. In other words, the parent lookup only goes as far as the classpath of all dependent plugins, not up the chain of all dependent plugins. Eclipse allows each plugin to "export" various classes, or packages, or entire .jar files and the lookup can go all the way up the chain if need be. I haven't yet found a big reason for supporting this, so I am not too concerned with that at this point. The engine does support reloadable plugins although I have not yet implemented it. Because each plugin information object is stored in a Map keyed on the plugins GUID (found in the plugin-conf.xml file), it is easy enough to load a new plugin (since they get their own classloader) and replace the object at the GUID key and now have a reloaded plugin. The harder part is properly notifying all dependent plugins of the reload and what to do with them. Therefore I have not quite yet implemented this feature although the first step can easily be done, so long as nobody minds the "remnants" of older plugins laying around and possibly not being garbage collected.
All of this works now, and I am using it. I do NOT have a generic UI framework just yet. I am working on that now. Eclipse has a very nice feature in that every plugin.xml file builds up the UI without any plugin code ever being created or ran. I am working on something like that now, although I am focussed more on the aspect of the engine at this point.
Two things keep me going. First, the shear fun of working on this and seeing it succeed, even if a little bit. Second, while I love the idea of Eclipse, OSGi and other engines, so far I have yet to find one that is very easy to write plugins for, is very small, and is "generic" enough for any use. Some may argue JBoss core, at 29K can do this. I don't know if it can. It is built around JMX and I don't know that I agree JMX is the "ultimate" core plugin engine for all types of apps. Not that mine is either, but I'd like to see what I am working on become that if possible. Currently, with an xml parser (www.xmlpull.org) added as part of the code, my engine is about 40K with debug info, maybe about 28K without. I expect it to grow a bit more with services, reloadable/unloadable code, and some other stuff. However, I am thinking it will still be around 50K in size and in my opinion, with an xml read/write parser (very fast one at that), extension/extensino points, services, dependencies, multiple versions of plugins (soon), load/unload/reload capabilities, .par management (unjar into work dir, download .par files from urls, etc) and open directory capabilities, inidividual classloaders, automatic dependency resolution, dynamic dependency resolution and possibly even more, I think what my engine offers (and will offer) is pretty cool in my book.
None the less, there is always room for improvement. One of the things I pride myself on is using as little code and keeping the code neat and easily readable, not to mention as non-archaic as possible, makes for an easily maintainable project.
So, having said all that, YES, the engine can be used as is right now. It does not reload plugins, but you can dynamically load plugins, handle dependency resolution, have a very fast xml read/write parser at your disposal for any plugin, and for the most part easily write plugins. That is all possible now. I should put the engine I have now up on my generic-plugin-engine sourceforge project one of these days, perhaps soon I will do that! While I have no problem handing out the code, I am currently the only committer and I don't have it loaded into CVS at this point. I would like to do so very soon.
So, if you are interested, by all means, let me know and I'll be happy to send you what I have, and love to have more help on the next version of this.

'Basic' external actionscript file/class usage

Hey All,
I'm a bit baffled by something that should, in my humble opinion, be a piece of cake...
The setup is really easy. A simple application with a single textinput, a button and a text component.
When the button is clicked a function is called that sets the text from the inputfield to the text component.
code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
    <mx:Script>
        <![CDATA[
            public function click(inputText:String):void {
                outPutTxt.text = inputText;
        ]]>
    </mx:Script>
    <mx:TextInput x="10" y="10" id="inputTxt"/>
    <mx:Button x="178" y="10" label="Button" id="Btn" click="{click(inputTxt.text)}"/>
    <mx:Text x="251" y="12" text="Text" id="outPutTxt"/>
</mx:Application>
As I said, really easy.
What I want to do is put the function 'click' into an external actionscript file or class. And still be able to, from within the external file, modify the outPutTxt stuff.
I'm aware that I could create a public bindable variable inside of the external file and then bind the outPutTxt to that variable, but I would really like to be able to 'simply' force the value...
Is that possible? If yes: how plix
If it's not possible, I'd like to know as well! And in that case, how would I then re-use the same instance of a class/file in multiple seperate components? Say I got a 'login' thingie where a user logs in (data stored externally in a seperate actionscript file/class) and I want to re-use that information on other pages... Or is this done automatically?
Any and all comments/answers are higly appreciated!
Pieter

Hey Levancho,
thanks for your answer!! Much appreciated.
However, the code you proposed threw an error...
Errormessage:
ReferenceError: Error #1069: Property outPutTxt not found on controls.Control and there is no default value.
    at controls::Control/btnClick()[C:\...\FlexTest_03\src\controls\Control.as:13]
    at FlexTest_03/__Btn_click()[C:\...\FlexTest_03\src\FlexTest_03.mxml:11]
So I tried something else where I bind the text in my OutPutTxt to a variable inside of the external class file.
Code:
Class:
package controls
    public class Control
        [Bindable]
        public var outPutText:String = "";
        public function Control()
        public function btnClick(inputText:String):void {
            this.outPutText = inputText;
Mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
    <mx:Script>
        <![CDATA[
            import controls.Control;
            [Bindable]
            private var control:Control = new Control();
        ]]>
    </mx:Script>
    <mx:TextInput x="10" y="10" id="inputTxt"/>
    <mx:Button x="178" y="10" label="Button" id="Btn" click="{control.btnClick(inputTxt.text)}"/>
    <mx:Text x="251" y="12" id="outPutTxt" text="{control.outPutText}"/>
</mx:Application>
And this basically did what I wanted to do... so I just need to do some major binding between my application and the classes I'll be using for my business logic.
Now for something else entirely...
Is there a way for me to pass the instance of my class between flex components?
Pieter

Seperate instances of server class for authentication

I'd like to implement some form of authentication in my server class. I thought about adding a few login routines and while the client hasn't authenticated itself all calls to functions other than the login stuff will throw Exceptions.
However, as I understand from the (in my opinion chaotic documentation and tutorial) every UnicastRemoteObject class is instanced only once and after that every client will use a threaded version of that same class instance... This would mean that if one client logs in, all clients log in as the object doesn't distinguise between clients.
So I either need a way to instance the server class for every client or (perhaps even more graceful) use a Login class that spawns a server class as soon as the login has been accepted.
Unfortunately I can't find anything on the web or the forums about this (lotsa problems like mine but either unanswered or different enough to be less than helpful).

I'd like to implement some form of authentication in
my server class. I thought about adding a few login
routines and while the client hasn't authenticated
itself all calls to functions other than the login
stuff will throw Exceptions.
However, as I understand from the (in my opinion
chaotic documentation and tutorial) every
UnicastRemoteObject class is instanced only once and
after that every client will use a threaded version
of that same class instance.No, you can have as many instances as you like but you have to start with a single object which is bound into the Registry. What you are after is a Session pattern like this:
public interface Login extends Remote
Session login(String credentials) throws RemoteException;
public interface Session extends Remote
/// ... whatever you want
then a singleton instance of LoginImpl is bound to the registry, the client retrieves it, tries to get a Session by logging in. The implementation of login() just looks like this:
public Session login(String credentials) throws RemoteException
// check credentials, RemoteServer.getClientHost() &c:
if not acceptable throw new AccessException();
// otherwise
return new SessionImpl(credientials);
}Easy as pie.

Easy ActionScript - helper Class for everyone

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