FDS - accessing outside java classes
Hi, I understand FDS can interact flex clients using
RPC,message and data services. What are the possible options for
FDS to intreact with Java applications/classes which are outside of
FDS/web server/app server. Is there any secret componenets (like
FCSJBridge.jar, FCSJ.jar) available in Adobe world to accomplish
this. -- shammi
Hi,
FDS and webservice provide higher level of application
communication in different protocol supports to save development
time. However, you still can use raw socket to connect to other
apps.
William Chan
Similar Messages
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Accessing a Java class from C when class is in a package
I'm accessign a java class from C using JNI: The JVM exists and I can access the class fine:
jclass cls; //java class
cls = (*env)->FindClass(env, "MyClass");
However when I put the class in a package I can't access it
cls = (*env)->FindClass(env, "mypackage.MyClass");
Does anyone know How I can access a java class in a package using JNI.
Thanks
..Been a while since I've done anything with JNI, But... Did you try this:
cls = (*env)->FindClass(env, "mypackage/MyClass"); -
JSP page access regular Java class
I am new to JSP. But most of the time people say JSP page access Java Bean classes.
I want to know what if I want to access regular Java classes?? Should I do like this
in the code:
<%
NormalJavaClass cl = new NormalJavaClass();
cl.process();
%>
<%-- JSP page access Java Bean -- %>
<jsp:useBean scope="session" id="formDataBeanObj" class="formdatatest.FormDataBean"/>
<jsp:setProperty name="formDataBeanObj" property="*"/>
<HTML>
<HEAD>
<TITLE>page1.jsp</TITLE>
<BODY>
<FORM METHOD="POST" ACTION="page2.jsp">
<H2>User Name = <jsp:getProperty name="formDataBeanObj" property="username"/></H2>
<%
NormalJavaClass cl = new NormalJavaClass();
cl.process();
%>
<P><INPUT TYPE="SUBMIT" VALUE="submit here">
</FORM>
</BODY>
</HTML>
Please advise. Thanks!!Yes, you can instantiate and reference any class visible to the Java runtime from within a JSP just as you can in an "ordinary" Java class. Behind the scenes, a JSP is converted into Java source code for a servlet class, and then compiled into the .class file. When you insert code into JSPs using either taglibs or code delimiters (<% %>, <%= %>), the JSP/servlet "engine" inserts this code into the servlet source code verbatim, and all non-Java text from the JSP is inserted into the source code inside of JspWriter.write(xxx) statements.
If you'd like to see the source code that your JSP is converted into, run your JSP in Tomcat and look in the "work" folder within the Tomcat folder after you access it the first time. Experiment around with the JSP and see how code within the <% %> and <%= %> blocks is inserted into the .java file. -
Accessing a java class method from the jsp page.
Hi im a beginner with jsp and im trying to find a way to access a method of my java class file in jsp page. After searching through the forums i tried to use the usebean tag. Im using apache to host the jsp file.Below is an excerpt of my code and the error message i got. What am i doing wrong? anyone know?
<%@ page language="java" %>
<jsp:useBean id="movies" class="movie.Movie" />
<jsp:setProperty name="movies" property="*"/>
<%
movies.getStart("file:///C:/Video/Applications2/sun.mpg");
response.setContentType("text/xml");
%>
exception
org.apache.jasper.JasperException: Exception in JSP: /View.jsp:7
4: <jsp:setProperty name="movies" property="*"/>
5: <%
6:
7: movies.getStart("file:///C:/Video/Applications2/sun.mpg");
8: response.setContentType("text/xml");
9: %>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
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:802)
root cause
javax.servlet.ServletException: javax/media/ControllerListenerHi thanks for responding. Ok i did look through and it was opening some gui. I still need the program to do server side processes so cant use an applet.but i dont need the gui so i revised it and removed the gui. also im using a servlet to call the class now yet i still have the same error. Any ideas?
Below is the vid2jpg code minus the gui.
import java.io.*;
import java.awt.*;
import javax.media.*;
import javax.media.control.*;
import javax.media.format.*;
import javax.media.protocol.*;
import java.awt.image.*;
import javax.imageio.*;
public class vid2jpg implements ControllerListener
Processor p;
Object waitObj = new Object();
boolean stateOK = true;
DataSourceHandler handler;
int imgWidth;int imgHeight;
Image outputImage;
String sep = System.getProperty("file.separator");
int[] outvid;
int startFr = 1;int endFr = 1000;int countFr = 0;
boolean sunjava=true;
* Static main method
public static void main(String[] args)
if(args.length == 0)
System.out.println("No media address.");
new vid2jpg("file:///C:/Video/applications2/sun.mpg"); // or alternative "vfw://0" if webcam
else
String path = args[0].trim();
System.out.println(path);
new vid2jpg(path);
* Constructor
public vid2jpg(String path)
MediaLocator ml;String args = path;
if((ml = new MediaLocator(args)) == null)
System.out.println("Cannot build media locator from: " + args);
if(!open(ml))
System.out.println("Failed to open media source");
* Given a MediaLocator, create a processor and start
private boolean open(MediaLocator ml)
System.out.println("Create processor for: " + ml);
try
p = Manager.createProcessor(ml);
catch (Exception e)
System.out.println("Failed to create a processor from the given media source: " + e);
return false;
p.addControllerListener(this);
// Put the Processor into configured state.
p.configure();
if(!waitForState(p.Configured))
System.out.println("Failed to configure the processor.");
return false;
// Get the raw output from the Processor.
p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW));
TrackControl tc[] = p.getTrackControls();
if(tc == null)
System.out.println("Failed to obtain track controls from the processor.");
return false;
TrackControl videoTrack = null;
for(int i = 0; i < tc.length; i++)
if(tc.getFormat() instanceof VideoFormat)
tc[i].setFormat(new RGBFormat(null, -1, Format.byteArray, -1.0F, 24, 3, 2, 1));
videoTrack = tc[i];
else
tc[i].setEnabled(false);
if(videoTrack == null)
System.out.println("The input media does not contain a video track.");
return false;
System.out.println("Video format: " + videoTrack.getFormat());
p.realize();
if(!waitForState(p.Realized))
System.out.println("Failed to realize the processor.");
return false;
// Get the output DataSource from the processor and set it to the DataSourceHandler.
DataSource ods = p.getDataOutput();
handler = new DataSourceHandler();
try
handler.setSource(ods); // also determines image size
catch(IncompatibleSourceException e)
System.out.println("Cannot handle the output DataSource from the processor: " + ods);
return false;
// setLayout(new FlowLayout(FlowLayout.LEFT));
// currPanel = new imgPanel(new Dimension(imgWidth,imgHeight));
// add(currPanel);
// pack();
//setLocation(100,100);
// setVisible(true);
handler.start();
// Prefetch the processor.
p.prefetch();
if(!waitForState(p.Prefetched))
System.out.println("Failed to prefetch the processor.");
return false;
// Start the processor
//p.setStopTime(new Time(20.00));
p.start();
return true;
* Sets image size
private void imageProfile(VideoFormat vidFormat)
System.out.println("Push Format "+vidFormat);
Dimension d = (vidFormat).getSize();
System.out.println("Video frame size: "+ d.width+"x"+d.height);
imgWidth=d.width;
imgHeight=d.height;
* Called on each new frame buffer
int nextframetime = 0;
private void useFrameData(Buffer inBuffer)
try
if(inBuffer.getData()!=null) // vfw://0 can deliver nulls
if(sunjava) // and with import javax.imageio.*;
int frametimesecs = (int)(inBuffer.getTimeStamp()/1000000000);
if(frametimesecs%10 == 0 && frametimesecs==nextframetime)
nextframetime+=10;
BufferedImage bi = new BufferedImage(outputImage.getWidth(null), outputImage.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics g = bi.getGraphics();
ImageIO.write(bi, "png", new File("images"+sep+"image_"+(inBuffer.getTimeStamp()/1000000000)+".png"));
catch(Exception e){}
* Tidy on finish
public void tidyClose()
handler.close();
p.close();
* Block until the processor has transitioned to the given state
private boolean waitForState(int state)
synchronized(waitObj)
try
while(p.getState() < state && stateOK)
waitObj.wait();
catch (Exception e)
return stateOK;
* Controller Listener.
public void controllerUpdate(ControllerEvent evt)
if(evt instanceof ConfigureCompleteEvent || evt instanceof RealizeCompleteEvent || evt instanceof PrefetchCompleteEvent)
synchronized(waitObj)
stateOK = true;
waitObj.notifyAll();
else
if(evt instanceof ResourceUnavailableEvent)
synchronized(waitObj)
stateOK = false;
waitObj.notifyAll();
else
if(evt instanceof EndOfMediaEvent || evt instanceof StopAtTimeEvent)
tidyClose();
* Inner classes
* A DataSourceHandler class to read from a DataSource and displays
* information of each frame of data received.
class DataSourceHandler implements BufferTransferHandler
DataSource source;
PullBufferStream pullStrms[] = null;
PushBufferStream pushStrms[] = null;
Buffer readBuffer;
* Sets the media source this MediaHandler should use to obtain content.
private void setSource(DataSource source) throws IncompatibleSourceException
// Different types of DataSources need to handled differently.
if(source instanceof PushBufferDataSource)
pushStrms = ((PushBufferDataSource) source).getStreams();
// Set the transfer handler to receive pushed data from the push DataSource.
pushStrms[0].setTransferHandler(this);
// Set image size
imageProfile((VideoFormat)pushStrms[0].getFormat());
else
if(source instanceof PullBufferDataSource)
System.out.println("PullBufferDataSource!");
// This handler only handles push buffer datasource.
throw new IncompatibleSourceException();
this.source = source;
readBuffer = new Buffer();
* This will get called when there's data pushed from the PushBufferDataSource.
public void transferData(PushBufferStream stream)
try
stream.read(readBuffer);
catch(Exception e)
System.out.println(e);
return;
// Just in case contents of data object changed by some other thread
Buffer inBuffer = (Buffer)(readBuffer.clone());
// Check for end of stream
if(readBuffer.isEOM())
System.out.println("End of stream");
return;
// Do useful stuff or wait
useFrameData(inBuffer);
public void start()
try{source.start();}catch(Exception e){System.out.println(e);}
public void stop()
try{source.stop();}catch(Exception e){System.out.println(e);}
public void close(){stop();}
public Object[] getControls()
return new Object[0];
public Object getControl(String name)
return null;
below is the servlet code.
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class ShowMovie extends HttpServlet {
String rootURL="http://127.0.0.1:8080/Video/";
public void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//String movie=request.getParameter("movie");
String movie ="son";
getStart(movie);
response.sendRedirect(rootURL+"View.jsp");
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
public void getStart(String url){
new vid2jpg(url);
this is the error from the server. Im using tomkat 5
exception
javax.servlet.ServletException: Servlet execution threw an exception
root cause
java.lang.NoClassDefFoundError: javax/media/ControllerListener
java.lang.ClassLoader.defineClass1(Native Method)
java.lang.ClassLoader.defineClass(Unknown Source)
java.security.SecureClassLoader.defineClass(Unknown Source)
org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1812)
org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:866)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1319)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1198)
java.lang.ClassLoader.loadClassInternal(Unknown Source)
ShowMovie.getStart(ShowMovie.java:31)
ShowMovie.processRequest(ShowMovie.java:14)
ShowMovie.doGet(ShowMovie.java:22)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs. -
Is it possible to access jcx from java class ?
from jpf i am calling java class which inturn calls jcx and
i am getting nullpointer exception at jcx call in java class
waiting for solution...
thanks,
sridharShrishar,
Unfortunately in the current release controls cannot be accessed from stand
alone java classes. You can create a custom control which can invoke the jcx
and be invoked from within the jpf.
Regards,
Raj Alagumalai
Backline Workshop Support
"sridhar" <[email protected]> wrote in message
news:4083d449$[email protected]..
>
Is it possible to access jcx from java class ?
from jpf i am calling java class which inturn calls jcx and
i am getting nullpointer exception at jcx call in java class
waiting for solution...
thanks,
sridhar -
How to access a Java class from view controller?
Hi All,
I have created a Test.java class file from Navigator view under
Src --> Packages --> com.sap.MyProject.
When I try to access the Test class from view controller,
I getting this error "Test cannot be resolved or is not a type".
How do I fix this?
Thanks
SundarHi,
I have created a Test.java class file from Navigator view under
Src --> Packages --> com.sap.MyProject.
After this you can goto the context of your View and define the VA goto the type of VA and click on the right side button and go to java native type and type your java file name click you name .
that means the jave file s assigned to VA.
U can utilize thrut that VA.
Thanks,
Lohi. -
Accessing custom java classes in Coldfusion
I have created some java classes (.class) to work as a model
in CF. I could instantiate this classes through the CreateObject()
function in CF but I was unable to reach them from Flex, I mean
when I use the [RemoteClass(alias="javapackage.javaclass")] to
create a mapping in Flex. When I try to send a Flex instance of
this class it’s throwing an error: “Could not find the
Cold Fusion Component javapackage.javaclass”. Coldfusion
doesnt expose any custom class?
Any Clue?Hi all,
I got further problem regarding this issu. Using Sun App Server 8.2, I've easily and succesfully had my custom classes loaded just by dropping them to the WEB-INF/classes directory. But when I move those classes to another IDM server on WebLogic 8.1 SP 4, it just won't load. The rule invoking the class gave this:
com.waveset.exception: class com.waveset.my.CustomClass not found.
I've tried to add the classpath to the Weblogic startup script, but still not working. Any ideas? -
How can I access my java class file in a .jar file ...PLz Help anyone!!
Hi Folks,
I am new in Java programming, have a .jar file that contains .java files that I want no access and use from another .java file. These files in the .jar file basically form a library thus have no main-method. However I can not declare an instance of the library (in the .jar file) and use it within my program.
Plz help ...I have tried all I know in vain.
Thanks.temba wrote:
Hi Folks,
I am new in Java programming, have a .jar file that contains .java files that I want no access and use from another .java file. These files in the .jar file basically form a library thus have no main-method. However I can not declare an instance of the library (in the .jar file) and use it within my program. You are making little sense. You can't instantiate .java files.
Plz help ...I have tried all I know in vain.
Thanks.Could you post WHAT you have tried and also post what error messages you received? -
Accessing Java Classes from Forms
Is is possible to access a Java class from Forms? I have been
creating an Active X control that returns a Java object, and from
that I can call methods on that object, but I would really like
to do that without having and Active X control in the mix. Any
suggestions?
nullOracle Developer Team wrote:
: Robert Nocera (guest) wrote:
: : Oracle Developer Team wrote:
: : : hey robert -
: : : Developer 6.0 provides this ability for web deployment.
You
: : can
: : : insert your own custom Java components into your
application
: : and
: : : they will appear in the application when it is run via the
: web.
: : : If you look at the documentation for 6.0, there are a few
: : : section son Pluggable Java Components and JavaBeans that
: : : describes what is provided and how you use the interfaces
: and
: : : classes we provide.
: : : A whitepaper on this topic will be posted to the OTN
: shortly,
: : as
: : : well as some samples that illustrate how to go about doing
: it.
: : : cheers!
: : : -Oracle Developer Team-
: : Thanks for the quick response. Is there any way to access
: those
: : classes without being in a web deployment. That's probably
: not
: : totally out of the question, but what we had in mind was
: adding
: : some Java Functionality (actually connectictivity to some
EJBs
: : that we have) to existing forms. Currently there forms are
: not
: : deployed in a "web" environment and are just run from the
: forms
: : runtime engine.
: : -Rob
: hey again robert -
: there's no easy way (yet!) to call out from forms runtime
: process to a Java application.
: We've played around some with creating an ORA_FFI interface to
: JNI and then wrappering this with PL/SQL code. We've been able
: to make calling into an EJB running in 8i from a forms runtime
: work using this approach.
: Let me know if this is of interest to you and I can post the
: stuff we've currently got. It's no more than a simple demo and
: is not complete. It requires quite a bit of manual coding on
: the PL/SQL side since the interface emulates JNI (FindClass,
: GetMethodID, CallMethodID, etc.).
: cheers!
: -the Oracle Developer Team-
I'd be interested in this ORA_FFI doc you've been playing with.
Would you please email it to me or post it.
null -
Accessing Java Class using JNDI
Hi,
I am looking for a way for accessing a java class (non-ejb) and invoking a method in it using JNDI.
ThanksSee if the follwing helps u
1).implement Referencable interface for your java class. Implement serialize interface also.
2).Referencable interface has a methd referencable() which will be invoked by JNDI naming system when a lookup is made by client.
3) in referencable method create a Refrence object.(Reference is a api class).This Reference object can be created to contain a lot of info about the remote obj u have registered. In that u can say the class that be used to create your client side stub.
4).now when client does a lookup, jndi creates a stub using Reference object and sends it to client.
5)the methods now u call gets passed on to actual machine running ur remote object -
Access a normal java class from EJB
how can i access normal java class from an EJB.
I do not want to write the business logic inside the EJB. How can I achieve this.There's no special API for doing this. Just use normal java. E.g.
@Stateless
public class FooBean implements Foo {
public void foo() {
// access non-EJB utility class Bar
Bar b = new Bar();
b.bar();
} -
Java Classes and JSP`s (urgent)
hi, my question is:
How can i invoke normal java classes` methods using Jsp`s for this??, is it possible??, if it is, then how do you do this, and where do you have to put the java classes in order to find them from a jsp.
thanksHi,
You can access normal java classes in JSP pages. You have to import them in the header like this:
<%@ page language="java" import="//your java class file with package"%>
or if u r using java beans, then use the <usebean> tag. Put the java classes in the classes directory. Which server u r using? If it is JWS, then u have a specified classes directory, where u have to put all the class files along with their packages. Hope this will help.
atanu. -
How to refer java class in c++
Dear All,
We have the requirement to access one java class from c++ program. Please share your ideas which will take me towards the right direction.
Thanks in advanceNaturally you can't do much with a java class without bringing in the whole machinery of the JVM and it's libraries. The mechanisms to run Java from another language (and vica versa) are in the JNI (Java Native Interface). This would allow a C++ program to load the JVM and a named java class and execute methods on it as well as doing the necessary type conversions.
-
Can not locate Java class using JNI within C++ DLL
I am using trying to use JNI to call a Java class from C++. The Java class uses JMS to send messages to a JMS message queue. At first I coded the C++ in a console application that created the JavaVM and used JNI to access the Java class. All worked fine. Then I called the Java class using JNI from threads and ran into the problem of the Java class not able to locate the JMS related classes. This was solved by placing the following line in the constructor of the Java class.
Thread.currentThread().setContextClassLoader(ClassLoader.getSystemClassLoader());
Then I moved the JNI code from a console application to a DLL in specific an extension DLL that is called by SQL Server or Oracle server. The DLL will use JNI to call the Java class and send messages to a JMS message queue.
The problem I am having now when the DLL code is called by SQL Server the call to
JNI_CreateJavaVM
appears to work correctly but the call to find the Java class using
jvmEnv->FindClass(pName)
fails. It appears the is a class loading problem which occurs due to the fact JNI is called from a DLL. When the VM is created I pass the class path information using the statement
-Djava.class.path=
And as I stated before it all works when running from a console application. I am new to JNI and really need help in the form of some sample code that will solve this problem. I believe I need to somehow load the classpath information from the DLL but I can not find examples on how to do this using JNI. I have tried several ways using URLClassLoader and getSystemClassLoader from JNI and either it does not work or it crashes very badly.
I used the following code to determine what the existing class path is and the string returns empty.
jcls = jvmEnv->FindClass("java/lang/System");
jmid = jvmEnv->GetStaticMethodID(jcls, "getProperty", "(Ljava/lang/String;)Ljava/lang/String;");
jstrClassPath = jvmEnv->NewStringUTF("java.class.path");
jstr = (jstring)jvmEnv->CallStaticObjectMethod(jcls, jmid, jstrClassPath);
m_jstr = (jstring)jvmEnv->NewGlobalRef(jstr);
pstr = jvmEnv->GetStringUTFChars(m_jstr, 0);
Can anyone please help with example code that will solve this problem. Thanks in advance for any help.
Charles�I have determined the problem occurs when the application/component is compiled using VC 6.0. The test application was compiled using VC 7.1 and works correctly by locating the class path information. If the test application is compiled using VC 6.0 it has the same problem.
The jvm.dll I am using is version 1.4.2.80. Currently this is not an option to compile all the applications that use JNI using VC 7.1 so can someone please tell me how to solve this problem. -
Hi...
My Bpel process accesses some java objects..To keep classes and projects separate I am keepin these classes in a war/ear and deploying it on oc4j...do u think the process can access the java classes in .war file..
I know i can have the java classes along with process source and copy the libs in BPEL-INF/lib but was trying to keep the code separate..
The process when compiled and built is packaged into .jar archive ..If we can drop this jar in an .ear package and deploy it probablythen the process can access the java classes..Can I access samples for the same?..
Thanks
BhupinderI don't believe you can access java objects from a war/ear, at least I wasn't able to get it working.
We have been jar'ing the objects up and placing them in C:\OraBPELPM_1\integration\orabpel\system\appserver\oc4j\j2ee\home\applib where the apps server can find them.
Toby
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