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JavaOne Trip Report and Technology Overview

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That is understandable given the open nature of Java. ... JCP - Java Community Process (not JC Penney's). The way the Java platform evolves ... – PowerPoint PPT presentation

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Title: JavaOne Trip Report and Technology Overview


1
JavaOne Trip Report and Technology Overview
  • Ron Mackenzie
  • April 2002
  • This presentation is on the Web at
  • http//www.slac.stanford.edu/ronm/JavaOne2002.htm
    l

2
JavaOne vs DECUS
  • My personal observations 
  • Sun is much more open about release timing and
    contents than DEC ever was.
  • That is understandable given the open nature of
    Java.
  • Sun cares about what developers think and wants
    them involved in the process of Java Platform
    definition.
  • Sun is actively trying to get developers excited
    about the technology and asking them to develop
    applications.
  • It's fun to have the focus on Software completely

3
Outline
  • Technology overview
  • Lots of 3 and 4 letter acronymns
  • Its all on the web off my home page ronm
  • Conference Highlights
  • Youll see many of the acronyms twice. Once in
    this Overview and again with more detail from
    Greg

4
Web Services
  • Everything connects to everything via soap".
  • Not just for browser applications. B2B and
    Machine to Machine applications too.

5
Web Services - Key Technologies
  • Java Servlets
  • JavaServerPages (JSP) and JSP standard tag
    library (JSTL)
  • JavaXML Pack (JAX).  A set of API's providing
  •  JAXM-messaging via soap
  • JAXP-processing api
  • JAXR-client side registry
  • JAX-RPC-      RPC call ingerface including stub
    and skeleton generation
  • WSDL (Web Services Definition Language). Tools
    generate WSDL(not very readable).  Like IDL, it
    defines interfaces across web application

6
Web Services Supporting Technologies
  • Apache Tomcat, (Servlet and JSP container)
  • Ant (or some other build tool).
  • Registry server

7
SOAP and XML
  • SOAP - Simple Object Access Protocol. 
  • Provides standard packaging structure for
    transporting XML documents over HTTP, FTP, SMTP,
    etc
  • XML - Extensible Markup Language. 
  • XML is an industry-standard, system independent
    way of representing data.  Like HTML, it is a
    markup language that encloses data in tags.  The
    difference is that XML tags describe the content
    (HTML only tells you how to display it). Also,
    XML tags are extensible (you can write your own
    tags to describe the data content).  You can
    retrieve from data sources like Oracle
    efficiently with XML.

8
JSPs and Servlets
  • Java Server Pages (JSP)
  • Put the code into the web page.  It's like an
    HTML page with Java in it.  Easier for most
    people to write than Servlets.
  • Servlets
  • Put the html into the application code.
  • Both technologies allow you to run programs as a
    result of web requests. These programs can
    access databases and other systems for example.
  • They can do
  • -SOAP parsing, EJB and JMS execution …..

9
Sun Has Grouped  Java Technologies Into Three
Editions
  • Standard (J2SETM technology)
  • Enterprise (J2EETM technology).
  • - Set of standards that provide a web application
    development and deployment platform. J2EE
    includes standards for middleware (EJB and JMS),
    database connectivitiy (JDBC), transactions
    (JTA/JTS), presentation (servlets and Java Server
    Pages) and directory services (JNDI).
  • Micro (J2METM technology)
  • Minimum sized JVM and set of API's that fit in
    consumer devices.
  • Big Java / Little Java.  These were cute terms
    used by one speaker to describe J2EE/Web Services
    vs J2ME.

10
SunOne and JCA
  • SunOne  Sun's Open Net Environment.  It's Sun's
    software strategy (and set of tools) for
    developing and deploying Web Services
  • Solaris
  • Forte Tools
  • Java
  • iPlanet Application Server 
  • more...
  • www.sun.com/sunone
  • JCA - Java Connector Archetecture. As with JNI
    (Java Native Interface), JCA is used to access
    Native or Legacy Applications

11
JCP
  • JCP - Java Community Process (not JC Penney's).
  • The way the Java platform evolves
  • Open organization of developers who develop and
    revise Java technology specifications and
    reference implementations.
  • Created by Sun but has people from all over the
    map.
  • Java Specification Requests (JSRs) are
    descriptions of proposed and final specifications
    for the Java Platform.

12
What is Microsoft .NET?
  • The dark force?
  • It is Microsoft's propriatary solution providing
    XML Web Services. See http//www.microsoft.com/net
    /
  • Notice that the words "Web Services" are not used
    in Microsoft's description of .NET Microsoft
    .NET is the Microsoft platform for XML Web
    services. XML, an industry standard data format,
    Is the "lingua franca" that enables data-sharing
    among disparate applications and devices.

13
Microsoft .NET (its not Servlets/JSPs)
  • Notice the missing words "Servlet" and JSP in
    Microsoft's description of .NET servers The
    Microsoft .NET Enterprise Servers, Windows 2000
    Server family, and the upcoming Windows .NET
    Server family, with their built-in security,
    their support for XML and their ability to
    quickly scale-out to meet increased demands,
    provide the best solution to host and deploy XML
    Web services and the .NET platform

14
Microsoft .NET (interoperability)
  • Microsoft says .NET will interoperate with other
    Operating systems/languages. 
  • This statement is from Sun Sun ONE platform
    services and .NET services use common open
    standards such as those based on XML and SOAP.
    Therefore, the Sun ONE platform is able to use
    .NET Web services and is able to provide Web
    services to the .NET environment.
  • BUT… .NET is a propriatary solution any you'll
    only be able to run on Microsoft based platforms.

15
.NET
  • Java (the language and the platform) is not part
    of the .NET solution. 
  • So, your Java serverside code won't run on a
    .NET server.
  • The .NET solution requires that you use Microsoft
    products for development and deployment of XML
    Web Services
  • Microsoft  .NET Visual Studio .NET for
    Bill Gates
  • OpenSource tomcat J2EE linux which is free.

16
Leveraging Open-Source for complete J2EE
application
  • CVS - Same as we use.
  • Jakarta ANT XML based Java based build tool.
  • Junit - Simple framework to write repeatable
    tests. http//www.junit.org/
  • Jakarta Cactus -  Test framework for J2EE
    server-side java code
  • Jakarta log4j - Distributed application logger.
  • AspectJ - aspect-oriented extension to the Java
  • "seperate program logic into different aspects".
    http//aspectj.org/
  • Jakarta Struts
  • Use MVC framework to create Servelet, JSP, and
    JavaBean systems.
  • Jakarta Tomcat -Servlet Container 
  • JBoss - J2EE Application Server
    http//www.jboss.org/
  • mySQL - Very popular open source database
    http//www.mysql.com/

17
Conference Highlights
  • Web Services, XML, and SOAP were the hot
    topics.  
  • Wireless technology was a major thrust of the
    conference which I largely skipped (where
    possible).
  • J2SE (standard edition) 1.4 (code name Merlin) 
    is available.  It's solid.  Start using it.
  • Improvements in Security and Performance. 
  • Corba is provided. 
  • X-connections on sun and linux can be 10x
    faster. 
  • Complete X rewrite, sending less over the wire. 
  • Swing/J2D is 20-60 faster because it now
    accesses platform specific graphics card
    features.

18
Java New IO (NIO)
  • Java.nio (new IO API package) added to J2SE 1.4
  • New API for doing I/O. 
  • Much faster than usual java.io package.
  • Scalable I/O
  • Fast Buffered binary and character I/O
  • I/O Multiplexed over multiple sockets (App
    Servers have done this already).
  • No longer one thread per socket
  • Scatter IO support
  • Improved file system interface (almost as fast as
    native).
  • Async I/O not there
  • http//www.jcp.org/jsr/detail/51.jsp

19
Other networking improvements
  • Networking improvements in J2SE 1.4 besides NIO
  • IPV6 support.  Expanded routing and addressing
    (128 bit addresses format)     Solaris 8 and 9
    have dual stack capability (apps can support
    both).     WinXP does not have dual stack
    support, so no IPV6 Java support.    
    http//www.ipv6.org/
  • Multicast, datagram, tcp, NIO  all support with
    IPV6
  • SetSockOpt and other operations supported before
    connection
  • URI  java.net.uri. Uniform Resource Identifier
    (more flexable than URL class for files, paths,
    urls).   
  • java.net.NetworkInterface - for accessing network
    hardward (like ethernet adaptors). Makes it easy
    to find the adaptors on your system and restrict
    I/O to one of them for example.
  • Window size negotation support (for 64k buffers)
  • Partial out-of-band support
  • More... SOCKS support, Name Server improvements,
    JSSE (Server Socket Extension).

20
The Why and How of Web Services
  • Reduced development time is one of the big
    advantages of Web Services.  
  • Forte for Java (sun IDE) was demonstrated.  It
    does Web Services Development and deployment. 
    Saw a demo where an EJB was used to accesses a
    legacy DB.  Then, they used the tool to publish
    it as a web service.  This all took 5 minutes.
  • Basic XML Web services are being delivered now by
    Sun using iPlanet, Java, and Forte products. 
  • Lots more is coming.  This is a rapidly evolving
    technoligy.
  • The Sun Web Services Development Pack was being
    given away. 
  • It contains the suite of Web Services
    technologies.

21
More of the How of Web Services
  • For graphics, one speaker said that Browsers are
    low quality.  So, use J2SE's Swing/AWT/2D in
    non-browser applications instead. 
  • But, if you're deploying into a web environment,
    you must use "Web Start" or a Java plug in.
  • Sun encouraged people to 
  • Use J2SE 1.4 - it's stable
  • Build Web Services with JAX-RPC
  • Build Rich Clients with Swing/AWT
  • Don't just target browsers.

22
Finally…
  • Windows XP doesn't include JRE (that's what the
    latest law suit is about, right?). 
  • Of course you can download it, but that's a
    problem for casual users.
  • The solaris JVM supports 64 bit operations. 
  • This is great for large dataset transfers (4GB).
  • Message logging technologies
  • Jakarta log4j - runtime message logging and
    application tracing.  Configurable at run time. 
    Small performance cost.  Provides detailed
    descriptions of applicaiton failures.
  • J2SE 1.4 has a NEW logging API built in.
  • System.out.println - the old standby.

23
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