How to debug codes with Lightstreamer

minhphan200677

Hi all,
I am trying to modify the StockListDemo Data Adapter to pull data from a sql database. Anyone can tell me how i can debug with LightStreamer codes? Thanks

Mone

Hi,

With eclipse 3.3 (but it should be similar with any IDE)

Install Lightstreamer and remove from LS_HOME/Adapters/StockList the lib folder.

Obviously create a project with the sources.

Add lightstreamer.jar and ls-adapter-interface.jar to the build path of the project: right click on the project -> properties -> Java Build Path -> Librearies folder -> Add External JARs. You can find those jars on the LS_HOME/lib folder. Now the project should not show any compile error.

Create a launch configuration: Run -> Open Debug Dialog -> Double click on Java application. A new launch configuration is created. Now we should configure it:

"Main" folder -> As main class set "com.lightstreamer.LS"
"Arguments" folder -> as Program arguments set "conf/lightstreamer_conf.xml"
"Arguments" folder -> as VM Arguments add "-Dlightstreamer.native.path=lib/native"
[Just in case you use a JVM 1.5 or older]
"Arguments" folder -> as VM Arguments add "-Xms64M -Xmx512M" (you can configure those values as you like or omit them completely)
"Arguments" folder -> as Working directory set the LS_HOME path (in my case "C:\Programs\Lightstreamer")
"Classpath" folder -> click on user entries and then click on Add External JARs. Select all the jars located under LS_HOME/lib (but not lightstreamer.jar and ls-adapter-interface.jar that are already on the classpath)

Click debug and you're ready to debug your adpater running inside Lightstreamer.

Hope that helps.
Let me know if I forgot something or some clarification is needed.

para

Hello Mone or others
I am trying to modify the Stocklist _DemoData Adapter to pull data from our mySQL database. I am not very familiar to Java but my experience with other languages, java is quite friendly. I am developing with the version on Linux. Could you please give me detailed instructions to build the project and compile, debug on linux? I think I need to modify the ExternalFeedSimulator, then how to compile and make the modification available to LightStreamer.
Sorry that if you may find the questions novice since I am starting to understand how Lightstreamer work.
Thanks a lot

Mone

para,
please take a look here: http://www.lightstreamer.com/vb/showthread.php?t=23

detailed instructions to build the project and compile

Install the eclipse IDE and follow the instructions from my previous post and let me know if at any point you get lost.

quanhm

I managed to run LightStreamer server in Eclipse 3.3 but it runs in unregistered mode :o How can I make it run in registered mode ? By the way, could you please give me some more details about debuging a source code (line to line) after I make the LightStreamer run? Thanks so much

Alessandro Alinone

To run Lightstreamer Moderato in registered mode, you need to get a Free License. Pelase follow this link to get the license.

quanhm

@Alessandro, Wrote: To run Lightstreamer Moderato in registered mode, you need to get a Free License. Pelase follow this link to get the license.

I already got a Free License with my MAC address, there's no problem if I run the file 'Start_LS_as_Application.bat' in command, but in Eclipse it gives the following messages :
07.Nov.07 09:16:06,578 < INFO> Starting MAC address check
07.Nov.07 09:16:07,796 <FATAL> Could not check license.
07.Nov.07 09:16:07,796 < WARN> A proper Free License was not configured.....

Dario Crivelli

Hi

Make sure that all settings in the launch script are replicated in your launch configuration for Eclipse.
The reported problem may occur if the lightstreamer.native.path initialization is missing or the supplied path is not correct.
Assuming the "Lightstreamer" directory is used as the working directory, the JVM arguments should include:

-Dlightstreamer.native.path=lib/native

May you please check this first?

Dario

quanhm

Thank DarioCrivelli verry much, it works in registered mode now. Now I'll try to debug my Adapter like debuging a tomcat web application :Smile_Ab:

Mone

I've modified the original post accordingly to Dario's post.

dab

I have followed the instructions for debugging in Eclipse but get the following:
java.lang.NoClassDefFoundError: com/sun/jdmk/comm/AuthInfo

Mone

Hello,
the exception does not seem to be directly related to Lightstreamer.
Are you able to debug other projects in the same eclipse's workspace?
Do you have a larger stack trace?
Please try to "run" the application instead of "debug" it and see if the problem disappear.

dab

It is ok, I found the problem - I had not added the JMX jars to the classpath.

Thanks

David

Cyro

First I'd like to thank you for your help.

Next - I followed your guide for debugging but Eclipse debugger seems to just pass through my breakpoints. In debug dialog, on arguments folder, do I just put "conf/lightstreamer_conf.xml" or do I click on variables and then put that path in variables field?

Mone

You don't need to create a variable, just write conf/lightstreamer_conf.xml in the big blank space without clicking variables

Put a breakpoint in the subscribe method, click the debug button, than open a client that subscribes to an item of your adapter; you should be able to debug it.
If you still have problems try placing a breakpoint in the init method of your data adapter

howard

just started working with LS. demos all work fine. got the HelloWorld tutorial working from the command line *and* in eclipse.

takes a little careful reading of LS.sh, but works just fine. one odd thing: the lightserver_conf.xml file is in both the VM args and Program args. not sure why that should be, but...

there is one outstanding question when we run LS : we get an exception - i think from jmx binding to port 6666. any ideas the problem is with this bind exception?

it does not seem to affect how the HelloWorld demo runs at all.

30.Nov.10 16:24:52,954 < INFO> Started HTML Adaptor for JMX on port 6666
30.Nov.10 16:24:52,977 < WARN> Stopping service not available
com.lightstreamer.g.t: java.net.BindException: Address already in use
	at com.lightstreamer.g.b.c(b.java)
	at com.lightstreamer.g.z.a(z.java)
	at com.lightstreamer.k.c.a(c.java)
	at com.lightstreamer.k.c.a(c.java)
	at com.lightstreamer.l.b(l.java)
	at com.lightstreamer.l.a(l.java)
	at com.lightstreamer.LS.main(LS.java)
Caused by: java.net.BindException: Address already in use
	at java.net.PlainSocketImpl.socketBind(Native Method)
	at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:365)
	at java.net.ServerSocket.bind(ServerSocket.java:319)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.sun.jmx.remote.socket.SocketConnectionServer.start(SocketConnectionServer.java:128)
	at com.sun.jmx.remote.generic.SynchroMessageConnectionServerImpl.start(SynchroMessageConnectionServerImpl.java:39)
	at javax.management.remote.generic.GenericConnectorServer.start(GenericConnectorServer.java:233)
	... 7 more

Destin15

..thanx,... all for the conversation need not ask any question and got all the ans.... :Smile_Ab:

Saravanan_shivaji

Hello Mone,

The Steps are perfect.
I could debug the application.

Thanks.

geshd91

Hi friends,

I am new to LightStreamer setup and debug using Eclipse 3.3,just a few days of hands on. Need detailed guide on setup and debug in Eclipse as i am average learner.

Thanks in advance.

Mone

Hi There,

Where did you get stuck?