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Frequently Asked Questions

Is the TAO Naming Service interoperable with the JDK 1.4 beta 3 ORB?

Support - Frequently Asked Questions - The ACE ORB
JDK 1.4 supports Interoperable Object References (IORs). To use the JDK 1.4 ORB with the TAO Naming Service server: Start TAO Naming Service server: $ $TAO_ROOT/orbsvcs/Naming_Service/Naming_Service -ORBListenEndpoints iiop://host:port Then, run the JDK 1.
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Is TAO interoperable with Sun's Java JDK 1.3 ORB?

Support - Frequently Asked Questions - The ACE ORB
Sun's Java 1.3 ORB does not support character sets UTF-8 and UTF-16. To use Sun's Java 1.3 ORB with TAO, you must disable the generation of optional standard profile components in IORs generated by TAO. To do so, use the following ORB initialization option with TAO servers that generate IORs that will be used by Java 1.3 ORB clients: Thanks to Gordana and Kate Matic gordanam@ot.co.nz for posing the original question and Carlos O'Ryan coryan@uci.edu for providing the answer.
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How can I use TAO's Naming Service with my Java ORB?

Support - Frequently Asked Questions - The ACE ORB
When I use the TAO name service, JavaORB returns an org.omg.CORBA.INV_OBJREF in resolve_initial_references("NameService"). that contains code which discovers TAO's Naming Service via the multicast discovery mechanism. Hooking that into the initial references table is ORB-specific, however.
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What is TAO (The ACE ORB)?

jGuru: Patterns FAQ Home Page
TAO is The ACE ORB -- a CORBA ORB built using the ACE framework. TAO is an open-source, standards-based, middleware platform which targets real-time...
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How do I use JacORB with TAO's Naming Service?

Support - Frequently Asked Questions - The ACE ORB
JacORB applications can use TAO's Naming Service. Applications implemented with Java JDK 1.2 or later require a workaround to avoid using Sun's org.omg.CosNaming stubs, which are buggy. We'll use the -Xbootclasspath/p runtime option to eliminate that problem, as described below. Write your JacORB Naming Service clients as you normally would, using orb.resolve_initial_references("NameService") to find the Naming Service. import org.omg.CORBA.ORB; import org.omg.CosNaming.*; import org.omg.
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Is TAO interoperable with JacORB?

Support - Frequently Asked Questions - The ACE ORB
Yes, TAO is interoperable with JacORB. In fact, several versions of both TAO and JacORB have been tested together over the last several years.
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How do I override the JAXP implementation in JDK 1.4 and above?

Unofficial JAXP FAQ
In JDK 1.4, there is an Endorsed Standards Override Mechanism which can be used to override the classes in the JDK itself. One way to replace the classes in the JDK with the classes contained in a set of jar files is to place the jar files in some directory, "my-endorsed", and define a system property. For example, to use a newer version of Xalan, place the newer version of xalan.jar in the "my-endorsed" directory and invoke the Java launcher with the -Djava.endorsed.dirs= my-endorsed option.
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How do I secure a Naming Service?

CORBASEC Frequently Asked Questions and Answers
Nick Battle (August, 1998)46: Naively you have to use a CORBA product with the Security service implemented. Looking at the problem a bit more closely, there can be some nasty subtleties depending on what you are actually trying to secure. If you haven't already done so, you should read the recent thread in this [ed: comp.object.corba] group titled "Naming Service and SSL".
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How can I ensure that the Java JDK is using JacORB rather than its own ORB?

Support - Frequently Asked Questions - The ACE ORB
Java uses a properties file called "orb.properties" to determine which ORB to use. If the Java runtime doesn't find an orb.properties file, it uses the JDK's ORB. JacORB's orb.properties file is located in the top-level JacORB directory. Copy JacORB's orb.properties file into the Java JDK's ${java.home}/lib directory to enable JacORB.
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I am using Linux Fedora 1 and Sun JDK 1.5.0. Can I use 1.5 or do I need to use 1.4?

FAQs - Cocoon Wiki
To answer my own question... I uninstalled 1.5 and installed 1.4. Compiled and works fine. I suspect this is actually a problem with Ant. Is it possible to extend for example the form object in Flow? So that we have our own implementation of it? If so, are there examples. ps why was Flow written in javascript, and not java? Probably a stupid one:). Do you serialize it to JPG or PNG? Otherwise this error can not occur. But if, it's of course no longer SVG.
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What is Signal Chaining mechanism that has been implemented in JDK 1.4?

www.adobians.com
Signal-chaining enables the Java Platform to better interoperate with native code that installs its own signal handlers. The facility works on both Solaris and Linux platforms. The signal-chaining facility was introduced to remedy a problem with signal handling in previous versions of the Java Hotspot VM. Prior to version 1.
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How do I compile generics for use with JDK <= 1.4?

Java Generics FAQs - Under The Hood Of The Compiler
Retroweaver is a Java bytecode weaver that enables you to take advantage of the new 1.5 language features in your source code, while still retaining compability with 1.4 virtual machines. Retroweaver rewrites class files so that they are compatible with older virtual machines. Check out http://sourceforge.net/projects/retroweaver .
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Why do Swing GUI applications (including JDebugTool) hang in JDK 1.4?

JDebugTool - Graphical Java Debugger
Java Swing GUI applications (including JDebugTool) can hang in JDK 1.4. The work around is to add the following argument to java -Dsun.java2d.noddraw=true
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Scriptura XBOS requires JDK 1.4. I am running OS/400 V5R1. How do I get it?

Inventive Designers : Scriptura FAQ
The following document describes what you need to do to get JDK 1.4 (also known as Java 2 version 1.4) operational on your iSeries running OS/400 V5R1 : http://www-912.ibm.com/s_dir/slkbase.NSF/1ac66549a21402188625680b0002037e/0581029cdbcafcbd86256c4f00673b7d?OpenDocument
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Is there a sample that illustrates Non-Blocking Socket I/O in JDK 1.4?

jGuru: JNI FAQ Home Page
A sample server that illustrates Non-Blocking Socket I/O can be found at http://www.owlmountain.com/tutorials/NonBlockingIo.htm.
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Why should I use log4j when JDK 1.4 already ships with a logging API?

Log4j project - Frequently Asked Questions about log4j
Although both APIs are conceptually similar, the log4j API is significantly more flexible and offers many more features, too numerous to be listed here. You will discover that the additional features and flexibility turn out to be indispensable in the context of a mission-critical application. The open and collaborative way in which log4j is developped ensures that it continues to preserve and even widen its competitive edge.
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What is the black orb?

DeletionQuality.net [ Castle Series FAQ - Frequently Asked Q...
The orb is what The Wise One sealed the ‘ancient power’ inside before his demise, to protect everyone else from what had happened to his people.
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Is it necessary to secure naming service?

CORBASEC Frequently Asked Questions and Answers
If you're concerned about authentication, your DNS lookup was not secure and it would give you confidence you were talking to the right name server. On the otherhand, the client could have a list of trust points (certificates) to compare the identity presented by servers against, and a rogue name service will not be able to direct you to a rogue target.
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top]Why should I use log4j when JDK 1.4 already ships with a logging API?

Apache log4j 1.2 - Frequently Asked Technical Questions
Although both APIs are conceptually similar, the log4j API is significantly more flexible and offers many more features, too numerous to be listed here. You will discover that the additional features and flexibility turn out to be indispensable in the context of a mission-critical application. The open and collaborative way in which log4j is developped ensures that it continues to preserve and even widen its competitive edge.
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What is an Orb?

Frequently Asked Questions
Orbs are round often semi-transparent balls of light that are frequently photographed. Many believe these orbs to be the spirits of the dead, however most orbs are captured using digital cameras and are nothing more than digital flaws caused by lack of pixilation due to very low-light situations. There is absolutely no valid evidence that they are ghosts or the dearly departed. Over 95% of current orb pictures taken and displayed on the Internet were extracted from digital cameras.
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Chicago Ghost Investigations, Ghosts of Chicago
An orb when photographed is best described as a glowing ball of light. These balls of light are not usually apparent to the naked eye. They are mostly detected on film, photographs and by video cameras. Orbs are ghosts/entities/energies. Many orbs are photographed regularly, and mistaken as glare. Some paranormal experts believe orbs are a more evolved form of spirit, while others feel that orbs are just a form that the sprits have taken on.
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Paranormal Investigators of the Poconos Home Page
An orb is a sphere of energy which looks like a ball of light on film. Orbs are thought to be spirit energy. These can sometimes be seen with the naked eye, but are usually captured on film. Again, one must take certain precautions when filming, so as not to mistake a natural object, such as a raindrop, dust, or even reflecting light, for an orb.
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International Parapsychology Research Foundation, Inc. infor...
An orb is a form of manifestation created by a bioelectric anomaly that is most often seen in photographs. These are usually dense, circular balls of electromagnetic matter that are most often associated with haunted areas.
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What is 3 Beta-acetoxyandrost-5-en-7, 17-dione?

Frequently Asked Questions - Highest Quality, all natural an...
Beta-acetoxyandrost-5-en-7, 17-dione (3-BETA), is a natural substance produced by the body in our adrenal glands. Scientists and physicians believe 3-BETA plays an important role in up-regulating key thermogenic enzymes in the body, thereby enhancing resting metabolic rate.
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If I use naming service and VisiBroker, can I cooperate SSL into the system?

CORBASEC Frequently Asked Questions and Answers
You can enable SSL with any VisiBroker server by initializing the BOA with SSLTPool (if you pass the command line args into BOA_init, -OAid SSLTPool will do the trick) and initializing the SSL layer with a digital identity (you can do this with initializers to avoid modifying the code). The resulting IOR will contain an SSL component.
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Why can't my naming service start?

FAQs | CRC
To rule out problems with the startNamingService script, try starting the naming service manually as follows: "tnameserv -ORBInittialPort 1050". A common problem is a bad configuration in the "etc/hosts" file. Make sure your "etc/hosts" file doesn't contain the alias "localhost" and the name of your computer on the same row....most distributions of Linux do so. However, for CORBA to work properly, the "hosts" file must be changed as follows:
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NS400-How do I install the naming service?

FAQ
The Naming Service comes with VisiBroker 4.0 (Java and C++). It can be installed automatically when installing VB 4.0. There is a single jar file ins.jar for it. This works with the ORB, ie vbjorb.jar. For the current version of the naming service, the supported backing store adaptors come with the jar file for the Naming Service. There are four adaptors at this time, InMemory, JDBC, JNDI and DataExpress adaptors. In future, we may require the adaptors to be installed separately.
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NS505-How to bring down the Naming Service?

FAQ
For a non-persistency adaptor like InMemory, the end-result is to wipe off all the data in the Naming Server. All the servers need to register themselves with the Naming Server again for the clients to find them. However, if the underlying adaptor supports persistency, there is little impact since the state of the Naming Service can be reverted to its original form when it comes back up again.
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NS509-What can I configure for the Naming Service?

FAQ
If the adaptor used is JDBC, then you can set the type of JDBC driver (depending on the Database you wish to support), the location of the database, the login name and password and the size of the connection pool for the database. The configuration settings are kept in a property file. The file can be specified at the command line when starting up the Naming Service.
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NS122-Is the Naming Service compatible with the older 3.x Naming Services?

FAQ
The current 4.x API is to support the latest INS specification and the various new features that are now available. The interfaces available can be divided into the standard and proprietary portions. We still support support the standard 3.x omg NamingContext interface. This hasn't changed at all. The new INS specification defines a new interface called NamingContextExt that extends from the old NamingContext. All the new methods and extensions are found in this interface.
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