Web services, RMI or Sockets?

hi all,
we have a need to develop a J2SE V5.0 system consisting of:
a) Stand-along Java application acting as a real-time I/O data server;
b) Applets acting as client.
The data server provides real-time data to the Applet, so the client can see values changing on the web browser. Both real-time data server and Web server/Applets are stored on the same computer hardware machine.
Question:
1) What is the best technology to be used for the Ethernet TCP/IP communications between the data server and the Applet client.
thanks in advance.
Trajano Roberto

For the transmittion of data I would suggest sending a data stream from the server via socket.
This is very simple to achieve compared with RMI.
However, if you need the applet to perform requests for the server this is best acheived using RMI (or the like). Even if you don't need it now, you may need it in the future for this reason.
Personally, my preference is to use both for the different purposes.

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    -Djdbc.drivers=org.apache.derby.jdbc.ClientDriver
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    -Dcom.sun.enterprise.config.config_environment_factory_class=com.sun.enterprise.config.serverbeans.AppserverConfigEnvironmentFactory
    -Dcom.sun.enterprise.taglibs=appserv-jstl.jar,jsf-impl.jar
    -Dcom.sun.enterprise.taglisteners=jsf-impl.jar
    -Dcom.sun.aas.classloader.optionalOverrideableChain=appserv-ws.jar,commons-logging.jar,commons-launcher.jar
    -Dcom.sun.aas.classloader.appserverChainJars=admin-cli.jar,admin-cli-ee.jar,dbschema.jar,j2ee-svc.jar
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    Starting Sun Java System Application Server Platform Edition 9.0 (build b48) ...
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    CORE5076: Using [Java HotSpot(TM) Client VM, Version 1.5.0_06] from [Sun Microsystems Inc.]
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    ADM0001:MBeanServer initialized successfully
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    ADM1079: Initialization of AMX MBeans successful
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    [AutoDeploy] Successfully autodeployed : C:\Sun\AppServer\lib\install\applications\__JWSappclients.ear.
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    WEB0302: Starting Sun-Java-System/Application-Server.
    WEB0100: Loading web module [__default-admingui] in virtual server [__asadmin] at [/]
    WEB0100: Loading web module [adminapp] in virtual server [__asadmin] at [/web1]
    WEB0100: Loading web module [admingui] in virtual server [__asadmin] at [/asadmin]
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    Completed initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context '/asadmin'
    Initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context ''
    Completed initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context ''
    WEB0712: Starting Sun-Java-System/Application-Server HTTP/1.1 on 8080
    WEB0712: Starting Sun-Java-System/Application-Server HTTP/1.1 on 8181
    WEB0712: Starting Sun-Java-System/Application-Server HTTP/1.1 on 4848
    About to load the system app: __JWSappclients
    WEB0100: Loading web module [__JWSappclients:sys.war] in virtual server [server] at [/__JWSappclients]
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    CORE5051: Shutting down all J2EE applications ...
    CORE 5060 :  Stopping all J2EE Connector 1.5 Compliant resource adapters ...
    CORE 5061 : Resource adapters Stop() Complete
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    WEB0303: Stopping Sun-Java-System/Application-Server.
    WEB0713: Stopping Sun-Java-System/Application-Server HTTP/1.1 on 8080
    WEB0713: Stopping Sun-Java-System/Application-Server HTTP/1.1 on 8181
    WEB0713: Stopping Sun-Java-System/Application-Server HTTP/1.1 on 4848
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    -Dcom.sun.aas.classloader.appserverChainJars=admin-cli.jar,admin-cli-ee.jar,dbschema.jar,j2ee-svc.jar
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    -Dcom.sun.aas.classloader.sharedChainJars=javaee.jar,C:/Sun/AppServer/jdk/lib/tools.jar,install/applications/jmsra/imqjmsra.jar,commons-launcher.jar,C:/Sun/AppServer/imq/lib/jaxm-api.jar,C:/Sun/AppServer/imq/lib/fscontext.jar,C:/Sun/AppServer/imq/lib/imqbroker.jar,C:/Sun/AppServer/imq/lib/imqjmx.jar,C:/Sun/AppServer/imq/lib/imqxm.jar,C:/Sun/AppServer/lib/ant/lib/ant.jar,appserv-ws.jar,mail.jar,jsf-api.jar,jsf-impl.jar,appserv-jstl.jar,appserv-env.jar,jmxremote_optional.jar,C:/Sun/AppServer/lib/SUNWjdmk/5.1/lib/jdmkrt.jar,commons-logging.jar,activation.jar,appserv-rt.jar,appserv-admin.jar,appserv-cmp.jar
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    -Djava.util.logging.manager=com.sun.enterprise.server.logging.ServerLogManager
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    -Dcom.sun.aas.classloader.serverClassPath=C:/Sun/AppServer/lib/install/applications/jmsra/imqjmsra.jar,C:/Sun/AppServer/imq/lib/jaxm-api.jar,C:/Sun/AppServer/imq/lib/fscontext.jar,C:/Sun/AppServer/imq/lib/imqbroker.jar,C:/Sun/AppServer/imq/lib/imqjmx.jar,C:/Sun/AppServer/lib/ant/lib/ant.jar,C:/Sun/AppServer/lib/SUNWjdmk/5.1/lib/jdmkrt.jar
    -Dcom.sun.aas.classloader.appserverChainJars.ee=
    -Dcom.sun.aas.configRoot=C:/Sun/AppServer/config
    -Djava.library.path=C:\Sun\AppServer\lib;C:\Sun\AppServer\lib;C:\Sun\AppServer\jdk\bin;.;C:\WINDOWS\system32;C:\WINDOWS;C:\Sun\AppServer\lib;C:\Sun\AppServer\bin;C:\Sun\AppServer\bin;C:\Sun\AppServer\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Archivos de programa\Microsoft SQL Server\80\Tools\Binn\;C:\Archivos de programa\subversion-1.3.2\;C:\Archivos de programa\Subversion\bin;C:\Archivos de programa\QuickTime\QTSystem\;;;
    -Dcom.sun.aas.instanceName=server
    -Dcom.sun.aas.processLauncher=SE
    -Dcom.sun.aas.installRoot=C:/Sun/AppServer
    -Dcom.sun.aas.ClassPathPrefix=
    -Dcom.sun.aas.ClassPathSuffix=C:\Sun\AppServer\domains\domain1\lib\mysql-connector-java-3.1.12-bin.jar
    -Dcom.sun.aas.ServerClassPath=
    -cp
    ;C:/Sun/AppServer/lib/appserv-launch.jar
    com.sun.enterprise.server.PELaunch
    start|#]
    Starting Sun Java System Application Server Platform Edition 9.0 (build b48) ...
    CORE5098: AS Socket Service Initialization has been completed.
    CORE5076: Using [Java HotSpot(TM) Client VM, Version 1.5.0_06] from [Sun Microsystems Inc.]
    SEC1002: Security Manager is OFF.
    ADM0001:MBeanServer initialized successfully
    SEC1143: Loading policy provider com.sun.enterprise.security.provider.PolicyWrapper.
    sgmt.service_initialized
    ADM1079: Initialization of AMX MBeans successful
    ADM1504: Here is the JMXServiceURL for the Standard JMXConnectorServer: [service:jmx:rmi:///jndi/rmi://dani:8686/jmxrmi].  This is where the remote administrative clients should connect using the standard JMX connectors
    ADM1506: Status of Standard JMX Connector: Active = [true]
    SMGT0007: Self Management Rules service is enabled
    Application server startup complete.
    WEB0302: Starting Sun-Java-System/Application-Server.
    WEB0100: Loading web module [__default-admingui] in virtual server [__asadmin] at [/]
    WEB0100: Loading web module [adminapp] in virtual server [__asadmin] at [/web1]
    WEB0100: Loading web module [admingui] in virtual server [__asadmin] at [/asadmin]
    Initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context '/asadmin'
    Completed initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context '/asadmin'
    Initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context ''
    Completed initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context ''
    WEB0712: Starting Sun-Java-System/Application-Server HTTP/1.1 on 8080
    WEB0712: Starting Sun-Java-System/Application-Server HTTP/1.1 on 8181
    WEB0712: Starting Sun-Java-System/Application-Server HTTP/1.1 on 4848
    About to load the system app: __JWSappclients
    WEB0100: Loading web module [__JWSappclients:sys.war] in virtual server [server] at [/__JWSappclients]
    ADM1041:Sent the event to instance:[ResourceDeployEvent -- reference-added jdbc/aae]
    CORE5004: Resource Deployed: [jdbc:aae].
    wsgen successful
    DPL5306:Servlet Web Service Endpoint [AAEWebService] listening at address [http://dani:8080/WebAAEstates/AAEWebServiceService]
    deployed with moduleid = WebAAEstates
    WEB0100: Loading web module [WebAAEstates] in virtual server [server] at [/WebAAEstates]
    naming.bind
    topLink_version
    application_server_name_and_version
    login_successful
    Initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context '/WebAAEstates'
    Completed initializing Sun's JavaServer Faces implementation (1.2-b20-FCS) for context '/WebAAEstates'
    exception caught
    javax.naming.NameNotFoundException
            at com.sun.enterprise.naming.TransientContext.resolveContext(TransientContext.java:255)
            at com.sun.enterprise.naming.TransientContext.lookup(TransientContext.java:178)
            at com.sun.enterprise.naming.SerialContextProviderImpl.lookup(SerialContextProviderImpl.java:61)
            at com.sun.enterprise.naming.LocalSerialContextProviderImpl.lookup(LocalSerialContextProviderImpl.java:98)
            at com.sun.enterprise.naming.SerialContext.lookup(SerialContext.java:309)
            at javax.naming.InitialContext.lookup(InitialContext.java:351)
            at org.aae.jose.bd.AAEWebService.<init>(AAEWebService.java:43)
            at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
            at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
            at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
            at java.lang.Class.newInstance0(Class.java:350)
            at java.lang.Class.newInstance(Class.java:303)
            at com.sun.enterprise.webservice.JAXWSServlet.registerEndpoint(JAXWSServlet.java:291)
            at com.sun.enterprise.webservice.JAXWSServlet.doInit(JAXWSServlet.java:265)
            at com.sun.enterprise.webservice.JAXWSServlet.init(JAXWSServlet.java:108)
            at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1133)
            at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:787)
            at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:183)
            at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:566)
            at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:536)
            at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:240)
            at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:179)
            at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:566)
            at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:73)
            at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:182)
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            at com.sun.enterprise.web.VirtualServerPipeline.invoke(VirtualServerPipeline.java:120)
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            at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:566)
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            at com.sun.enterprise.web.VirtualServerPipeline.invoke(VirtualServerPipeline.java:120)
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            ... 34 more
    |#]
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    |#]
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sun.reflect.NativeConstructorAccessorImpl.newIn                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

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