You can find a new How-To Document that explains how to use OC4J and Eclipse together using the Lomboz plugin. You can download the server definition files for the Production release of OC4J 10g (9.0.4) or for the J2EE 1.4 Developer Preview 10.1.3.
Application Server Control
Management and monitoring support is provided by a new version of Enterprise Manager Application Server Control which is included directly within the OC4J 10g (10.1.3) Developer Preview 3 release.
Application Server Control is is fully JMX based and provides management and monitoring capabilities for this J2EE 1.4 compliant version of OC4J. It features a JSR-88 based deployment client with a powerful deployment plan editor, as well as a generic JMX MBean browser that is JSR-77 aware. Application (user-defined) MBeans are also supported to the same extent as system MBeans.
Other new areas of support include Web services management, TopLink session management, a JNDI browser, among many other new features.
Information on these tasks and more is available in the OC4J 10.1.3 Developer Preview 3 Documentation Library.
The OracleAS Job Scheduler provides asynchronous scheduling services for J2EE applications with the following features:
For the latest documentation and sample applications see the Scheduler How-To's on OTN.
Application ClusteringYou can now find a preview of the Oracle Toplink & framework integration. This allows you to easily use Toplink features in your Spring application. You can download it from OTN Web site.
As you may know this is Oracle Open World this week in San Francisco... I am working there all week mainly on the OC4J and JDeveloper demo pods. Come to see the new version that help you to develop J2EE and Web Services. Also I am presenting Thursday at 4pm a paper about Service Oriented Architecture (SOA) and Event Driven Architecture (EDA) I invite you to join this feast... if you can not take a look to the OTN at Oracle World blog, that highlights important keynotes, session and demoground activities... You can also take a look to the official Oracle Open World Web site
Oracle Containers for J2EE 10g (10.1.3) Developer Preview This fully J2EE 1.4 compatible release of OC4J offers improvements in classloading, data-source consolidation and configuration, TopLink integration and many other areas. This release also delivers a host of new capabilities in the area of Web Services, including management capabilities to enable and disable services and to configure message reliability, logging and security options. The brand new browser-based Enterprise Manager Application Server Control management console provides deployment, management and monitoring of all types of J2EE applications using the new standard JMX (JSR-77) and Deployment (JSR-88) APIs. Download it now and experience OC4J for yourself: http://www.oracle.com/technology/tech/java/oc4j/1013 Oracle JDeveloper 10g (10.1.3) Developer Preview The focus of this release has been to increase developer productivity, improve the user interface, and reduce the footprint. This Developer Preview release is intended to give you a sneak peek at the developer goodness to come and solicit your feedback. This release is the most substantial and ground-breaking we've had in years, adding many new features -- including a new look and feel, greatly improved coding environment, extensive refactoring options, J2EE 1.4/J2SE 5.0 support, and visual JSF development. We encourage you to take it for a spin. Download the product and check out the related resources at http://www.oracle.com/technology/products/jdev/101/
Jon Maron from Oracle has just published an article about transaction processing in distributed SOA. You will learn in this article the challenges that you have when you want to manage transactions in a distributed Services Oriented Architecture running using Web Services.
J2EE 1.4 introduces a major release of JSP: 2.0. Here some of the cool new features:
<html>Find more about JSP 2.0 Expression Language in the J2EE 1.4 tutorial.
<head><title>JSP 2.0 new features</title></head>
<body>
Hello ${param.name}
</body>
</html>
<%@ attribute name="title" required="true" description="Title of the document"%>Here is the JSP that uses this new Tag:
<%@ attribute name="textColor" required="true" description="Color of the Title"%>
<h1 style="color:${textColor}">${title}</h1>
<%@ taglib tagdir="/WEB-INF/tags/" prefix="tags"%>
<html>
<head>
</head>
<body>
<p>
<tags:mytag title="My new JSP" textColor="blue"/>
</p>
<p>
Hello World${param.name}
</p>
</body>
</html>
<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp</url-pattern>
<include-prelude>/WEB-INF/includes/prelude.jsp</include-prelude>
<include-coda>/WEB-INF/includes/coda.jsp</include-coda>
</jsp-property-group>
</jsp-config>
Oracle has published a new white paper about Service Oriented Architecture, and how Oracle Application Server 10g accelerates SOA development and deployment. Read the paper on the Oracle Web Site.
In the context of the 10th anniversary of Oracle TopLink, The Server Side published an interview of Mike Keith and Doug Clark, architect and product manager of TopLink. They talk about persistence in J2EE using EJB 3.0, but also the differences between TopLink and other persistence solutions...
One of my favorites tools on my Mac is Konfabulator that allows you to create -or use prebuilt- application called Widgets. This Widgets are for example battery level, weather, see the Widget Gallery. The reason why I love it is not necessary the list of existing one, but more because you can very easily develop yours using Javascript. Dowload it and start to develop your widgets, developer guide, javascript reference are available in the Konfabulator Workshop
I was discussing with a friend about the creation of a monitoring dashboard in HTML. As any monitoring tool you want to be able to see the information in *real-time*, so you need to refresh the content.... One way of doing it is to refresh the whole page and this is easy, just use the meta tag: <META HTTP-EQUIV="Refresh" CONTENT="5; URL=http://www.grallandco.com/"> where 5 is the number of seconds between each refresh. Javascript allows you to easily refresh a specific image of your page (a chart for example):
<img src="myChartServlet" name="chart1"/> <script language="JavaScript"> function loadImage() { var now = new Date(); if (document.images) { document.images.chart1.src = 'myChartServlet?time='+now.getTime(); // add the time to avoid caching } setTimeout('loadImage()',1000); } setTimeout('loadImage()',1000); </script>You can obviously make the whole think dynamic and configurable...
Oracle Database 10g Express Edition Beta Release is now available for download, from OTN:
Oracle Database XE is a great starter database for:
- Developers working on PHP, Java, .NET, and Open Source applications
- DBAs who need a free, starter database for training and deployment
- Independent Software Vendors (ISVs) and hardware vendors who want a starter database to distribute free of charge
- Educational institutions and students who need a free database for their curriculum
Admin Menu |
Object Browser |
If you ask yourself on which Operating Systems, JDK, Browser, etc... you can use Oracle Application Server 10g just consult OTN or Oracle Metalink:
Mike Keith,architect for Oracle Containers for J2EE (OC4J) and TopLink products and currently represents Oracle in the EJB 3.0 expert group, has published an interesting article about Annotations in Java 5.0:. To Annotate or Not? focused on the usage of Annotation or XML as metadata language. Mike provides sample code and explain the pros and cons of the annotation using use cases.
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Ronaldo Viscuso has just released a new version of his DHTML Menu Portlet. This portlet generates a DHTML menu for site navigation, with links to pages and subpages from a selected page group.
Stylesheet, height, width, mouse-over behavior, etc. are all configurable via the "Edit Defaults" page, which allows for complete customization for pretty much any desired look & feel.... The portlet, screen shots and installation document are available on the Portal Knowledge Exchange. |
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An Oracle Application Server (OracleAS) Provider for Jive Forums is now available to download from the Portal Integration Solutions page on OTN. The Oracle Application Server (OracleAS) Provider for Jive Forums contains portlets that allow users and administrators to:
You are looking for a articles about J2EE, JavaPro magazine put online a nice tool to search and view all the published articles:
Groovy, Java's New Scripting Language by Ian F. Darwin -- When some Java developers hear about Groovy, their first reaction is often, "Oh, no, not another scripting language for Java." Ian Darwin had the same reaction, until he took a good look at Groovy.
I am starting to use del.icio.us. A great way to manage your own bookmarks but also to share them with others... It is fun to see how many people are sharing the same bookmarks as you, and help you to find information related to the different categories... Also the integration with Firefox using the delicious plugin make the usage of the bookmark manager very easy. You can also use theApple Mac OS X client for del.icio.us. Here my bookmarks... still working on it
Responding to a customer question about Blob insertion in Oracle 10g DB using the JDBC 3.0 driver. Very Simple application. Download Java Source See insertBlob method.
package demo; import java.sql.*; import java.io.*; import java.sql.PreparedStatement; import java.util.*; import oracle.jdbc.driver.*; import oracle.sql.BLOB; /** * Insert record in the MEDIA table * MEDIA (file_name varchar2(256), file_content BLOB); */ public class BlobOracle { private final static String hostname = "localhost"; private final static String port = "1521"; private final static String sid = "ORCL"; private final static String username = "scott"; private final static String password = "tiger"; private static String fileLocation; private static Connection connection; public BlobOracle() { } /** * * @param args */ public static void main(String[] args) { try { if (args.length == 0) { System.out.println("\n\n Usage demo.BlobOracle"); System.exit(0); } fileLocation = args[0]; setConnection(); insertBLOB(); } catch (Exception ex) { ex.printStackTrace(); } finally { } } private static void setConnection() throws SQLException { DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); connection = DriverManager.getConnection("jdbc:oracle:thin:@"+hostname+ ":"+ port +":"+ sid , username , password); connection.setAutoCommit(false); // we must control the commit } private static void insertBLOB() throws SQLException, Exception { BLOB blob; File file ; FileInputStream is; OutputStream os; long ts1 = System.currentTimeMillis(); //Create a statement. PreparedStatement pstmt = connection.prepareStatement("insert into media (file_name, file_content) values (?,empty_blob())"); file = new File(fileLocation); String fileName = file.getName(); //Set the file name and execute the query pstmt.setString(1, fileName); pstmt.execute(); //Take back the record for update (we will insert the blob) //supposely the file name is the PK pstmt = connection.prepareStatement("select file_content from media where file_name = ? for update"); pstmt.setString(1, fileName); //Execute the query, and we must have one record so take it ResultSet rset = pstmt.executeQuery(); rset.next(); //Use the OracleDriver resultset, we take the blob locator blob = ((OracleResultSet)rset).getBLOB("file_content"); is = new FileInputStream(file); //Create a stream from the file // JDBC 2.0 //os = blob.getBinaryOutputStream(); //get the output stream from the Blob to insert it // JDBC 3.0 os = blob.setBinaryStream(0); //get the output stream from the Blob to insert it //Read the file by chuncks and insert them in the Blob. The chunk size come from the blob byte[] chunk = new byte[blob.getChunkSize()]; int i=-1; System.out.println("Inserting the Blob"); while((i = is.read(chunk))!=-1) { os.write(chunk,0,i); //Write the chunk System.out.print('.'); // print progression } // When done close the streams is.close(); os.close(); //Close the statement and commit pstmt.close(); long ts2 = System.currentTimeMillis(); connection.commit(); connection.close(); System.out.println("\n"+ (ts2 - ts1) +" ms" ); } }
Craig McClanahan has started a blog... and his second post -after a quick introduction- is about the 'hot' subject of the usage of Struts or JSF. Quote: For new development, here's the best strategy for determining what to do: * Evaluate the two technologies individually, to see if they satisfy your requirements. * If one or the other technology is sufficient, go ahead and use it (it's easier to learn and use one technology rather than two where possible); keeping in mind, however, the caveats about Struts HTML tags mentioned above. * If your requirements include unique features supported only by Struts (such as Tiles or client side validation support), feel free to use the two frameworks together.
Sun has sent a letter to the Java Community to start a single POJO persistence model, this will be done under the EJB 3.0 specification (JSR-220). You can see comments from the community on TheServerSide Web site.
Oracle and Fujistu just announced new SpecJ2002 results, establishing a new record of 5,991.73 TOPS@MultipleNode (total operations per second) with a price-performance of 654.20 Euros/TOPS@MultipleNode. This was realized using Oracle Application Server 10g running on Fujitsu servers. The results are available on the Spec Web site, the Press Release here.
The Middleware company has created an initiative to test the different Object-Relational mapping tools, this test is named Torpedo. You can find the announcement of this O-R benchmark initiative on TSS Web site. Oracle Toplink just posted news results that you can read and comment here.
Portalbook.com is the site of Jeff Linwood and Dave Minter, authors of the book Building Portals with the Java Portlet API. If you are interested in Portlet development, bookmark this site and buy the aPress book ! I did not have a chance to read the book yet, so feel free to give your feedback as comment.
Like lot of Java developers I was very excited about the announcement of the creation of the JSR-241... But where are we now ? The JSR mailing list ( http://news.gmane.org/gmane.comp.lang.groovy.jsr ) is very quiet... No meeting, not a lot of question/response. And like Patrick M. I have friends that have asked to be part of the Expert Group and never had any response. I think that the Groovy Language is really a nice way of putting Java to the next level, easier to learn, to use and still powerful... I will not go in an enumeration of the benefits of Groovy here... but just asking what the Expert Group is doing ? What is the next step for the Groovy Language and the JCP ?
Oracle has been involved in the JavaServer Faces (JSR 127) since its creation, and released yesterday a set of components. The list of the available component is availabe here. The software is available for download on OTN.
Lot of us want to create portlets (or publish content) based on weather information. The best solution that I found is the Weather Channel XML . And I was really impressed by xaopWeather (PHP based)! Let me know if you find an equivalent but Java based !
Gerard Davidson has created a java.net project to integrate AOP Framework to JDeveloper 10g, starting with an extension for AspectJ!
Today I was helping a customer on a deployment issue...
The first question that I have asked is:
"Which version of OC4J are you using ?". And he has no idea !
So let me give you some tips to know the version of Oracle components that you are using...
OC4JIn the j2ee/home directory:JPDK
java -jar oc4j.jar -version
Go in the provider test pageAlso if you are looking for a version of a specific component, Oracle development often use a 'version file' into the jar file of this component.This is the case for example for:
http://server:port/context/providers/your-providerYou can see the version of the in the bottom of the page. In the JPDK you can also use the HttpCommonConstants.COMPONENT_VERSIONS to access it programmatically.
So next time somebody ask you which version of the product you are using you will be all set !
Struts 1.2.1 Beta is now available for download. Duncan Mills published on OTN an article that explains how-to use Struts 1.2.1 with Oracle JDeveloper 10g.
Web Service Journal just publish an article 'Opening the Black Box of Integration' written by Mike Lehmann OracleAS 10g Product Manager. Summary:
If you've been working with integration technologies for any length of time, you're well aware of the freight train of standards that has been careening through the industry during the last five years. These standards, particularly in the Web services space, are on the verge of doing to proprietary integration servers what SQL and J2EE standards did to database and middle-tier servers of days gone by.
Rob,colleague of mine, pointed me to an article about "Evolvable Systems": Why something as poorly designed as the Web became The Next Big Thing, and what that means for the future First of all this article is very interesting, but the whole site -that I did not know- is full of truth, and fun ! ( I love the one about blogs) I invite you to bookmark http://www.shirky.com ! Thanks again Rob!
I have been working on the JavaOne Oracle Demo Ground where I was demonstrating OracleAS Portal 10g. I also attend several sessions (EJB 3.0 & CMP Persistence, J2EE 1.4 Web Services, AOP) and Thomas Kurian & James Gosling keynotes.
Also Tuesday afternoon I have been on duty on the Oracle Pod in the Apple developer conference, where I was demonstrating Oracle RDMS and JDeveloper 10g.
JavaOne
Oracle had a very nice and big demo ground, with the best location: in the front
of the main entrance. The main theme was Racing Cars. Oracle organized racing
contest using Sony Play Station with Gran Turismo 3.
The 10 stations demonstrated the same application that recall the main theme
since user can create easily a new racing team. To summarize, we have developed
a J2EE 1.3/1.4 application using ADF and POJO (Toplink) but also we integrated
JSF for the view, Web Service call and integration with business process using
the new Oracle BPEL
Process Manager. (Oracle announced the acquisition of Collaxa).
On the Portal station, the demo showed how easy it is to integrate existing MVC application(Struts, ADF, ...) using the Oracle JPDK. Portal teal also built a nice demonstration that shows the same portlet -business logic and view- developed using proprietary APIs (JPDK) and standard based implementation (WSRP & JSR-168).
Lot of people stop by the portal pod, and I was pleased with the quality of the questions:
Linda DiMichel's session about EJB 3.0 was a big one, the room was packed. EJB is taking the good path. Simplification of the objects no need to multiply the artifacts and deployment descriptors: EJB 3.0 will use Java annotations. 3.0 will use POJO -Plain Old Java Objects- and allow native SQL. This is just a very short summary of the new spec that looks very very good ! (and similar to what Toplink is doing for years)
AOP was also on of the think I wanted to see during this event. I was really
pleased by the AOP Panel of Wednesday afternoon. James Gosling, Graham Hamilton,
Cedric Beust and Gregor Kiczales presented and discussed AOP in general and AOP
in J2EE/Java in particular. My interpretation of the whole discussion is:
Everybody thinks that AOP is interesting, and will make code cleaner; but we
have a lot to do to simplify the development. Like Cedric and James said, I am
"conflicted" about AOP, and I think the reason is because we see the benefits of
AOP in simple case such as logging... But harder to implement cleanly when the
aspects are complex such as authentication/authorization or persistence. The
Java community still need to work on this to be sure that developers will
develop better code; AOP will give it, just have to find the good way ! I have also watched Alex Vasseur and Jonas Boner's session about AOP and J2EE,
mainly focus on
AspectWerkz. I really liked the paper with lot of demonstration that show
simple and concrete example of AOP within J2EE container.
Like lot of us I will continue to invest into AOP and experiment it within the
J2EE world.
James Strachan - JSR 241 Lead- session was also a very popular one. This session introduced the Groovy Programming Language that leverage the Java Language but using a concise and object oriented scripting language. I will not detail the content of groovy here, it will be better for you to take a quick look to the Groovy Web Site knowing that you can download the language and start to develop script with it.
Apple WWDC 2004
I was not able to attend any session... not event Steve Job's keynote. But I
worked on the Oracle demo pod Tuesday afternoon.
We had 2 dual G5 with 'old' cinema displays -hope that next year we will have
the 30 inches
display!-, these machines were used to run Oracle 10g database and
JDeveloper, currently available to developer, you can download them from
OTN.
But the big news is the fact that these products will be production on Mac OS X
soon:
I am sure that like me sometimes when you are testing product you do not know, or remember the default password. Take a look the the CIRT Web Site, not necessary up-to-date, but better than nothing!
