Wayback Machine
Home
Downloads/Releases
Documentation
Release history
Bug tracker
Mailing lists
CVS
Links
Getting involved
Legal

UDDI4J Overview

The UDDI (Universal Description, Discovery and Integration) Project is a comprehensive, open industry initiative enabling businesses to (I) discover each other, and (II) define how they interact over the internet and share information in a global registry architecture. UDDI is the building block which will enable businesses to quickly, easily and dynamically find and transact with one another via their preferred applications.

UDDI4J Structure

UDDI4J is a Java class library that provides an API that is can be used to interact with a UDDI registry. This class library generates and parses messages sent to and received from a UDDI server.

The central class in this set of APIs is org.uddi4j.client.UDDIProxy. It is a proxy for the UDDI server that is accessed from client code. Its methods map to the UDDI Programmer's API Specification.

The classes within org.uddi4j.datatype represent data objects used to send or receive UDDI information. and in the, business, service, tmodel subpackages represent data objects that are sent on calls or received from the server.

The subpackage org.uddi4j.request contains messages sent to the server. These classes are typically not used directly, rather the UDDIProxy class uses these classes.

Similarly, the subpackage org.uddi4j.response represents response messages from a UDDI server.

Pluggable transports are supported by the package org.uddi4j.transport.

Error Handling:

UDDIException is thrown when errors are received from the UDDI proxy when invoking UDDIProxy inquiry methods. UDDIException can contain a DispositionReport with information about the error.

APIs that do not return a data object return a disposition report directly.

TransportException is thrown if a communication error occurs or if the resulting data cannot be properly parsed as a valid SOAP message. This new exception class is required since the previous use of SOAPException created a dependency on Apache SOAP. TransportException wrappers any communications exception thrown by the underlying SOAP transport implementation (Axis, SOAP, HP-SOAP). The native exception is available, and a stack trace will indicate where the TransportException was thrown as well as the native exceptions stack trace.

Prerequisites

  • A SOAP transport. Supported transports include: Each transport has additional prerequisites. Consult the SOAP transport documentation for prerequisite information.
  • JDK version 1.2.2 or later.
  • Ant is required to build UDDI4J. Ant is available at the Apache ANT website.

Configuration

UDDI4J uses a variety of system parameters to configure behavior. The following system properties affect UDDI4J behavior.
Property name Values Description
org.uddi4j.TransportClassName org.uddi4j.transport.ApacheSOAPTransport, org.uddi4j.transport.HPSOAPTransport, org.uddi4j.transport.ApacheAxisTransport.

If missing, it defaults to “org.uddi4j.transport.ApacheSOAPTransport”. The property will be read at startup time, and any change at run time (after the TransportFactory has been invoked) will not have any effect. Also see (*) note below on adding a new SOAP transport. Selecting a SOAP transport
Selecting a SOAP transport
org.uddi4j.logEnabled “true” or “false”.

If missing, it defaults to “false”. The property can be changed at run time, and will be checked each time a UDDI message is sent out. Turning logging on or off.
Turning logging on or off.
http.proxyHost Valid host name. Hostname of http proxy
https.proxyHost Valid host name. Defaults to hostname of http proxy. Hostname of https proxy
http.proxyPort Valid port number. Defaults to 80. Port of http proxy.
https.proxyPort Valid port number. Defaults to http.proxyPort. Port of https proxy.
http.proxyUserName Valid user name. Username for proxy server
http.proxyPassword Valid password Password for proxy server
http.basicAuthUserName Valid user name. Username to use with HTTP Basic Authentication
http.basicAuthPassword Valid password Password to use with HTTP Basic Authentication

SOAP transport specific properties:
A SOAP transport can add to this list of properties. For example, the HP-SOAP transport adds the following:
Property name Allowed Values/Default behavior Description
hpsoap.logDirectory Valid directory path.

In case it is null/missing, or invalid or any error while accessing this directory, the log file will be created in the current directory.
The property will be read at startup time, and any change at run time (after the TransportFactory has been invoked) will not have any effect.
Directory path of log file
hpsoap.logFileName Valid file name.

In case it is missing, logging will be turned off. In case it is present, but null valued, all logging information will be sent to System.err
If file open/write fails, all log information is sent to System.err.
The property will be read at startup time, and any change at run time (after the
TransportFactory has been invoked) will not have any effect
File name of log file


Usage


The user can set these properties at startup time
C:> java –Dorg.uddi4j.TransportClassName=org.uddi4j.transport.HPSOAPTransport
-Dorg.uddi4j.logEnabled=true SomeUDDIClient


The user can set these properties at run time

System.setProperty (“hpsoap.logDirectory”,
“/tmp”);
System.setProperty (“hpsoap.logFileName”, “uddi4j.log”);
System.setProperty (“org.uddi4j.logEnabled”, “true”);
UDDIProxy uddiProxy = new UDDIProxy ();

Using UDDI4J

To run a program referencing UDDI4J,

  • Include uddi4j.jar in the classpath
  • Include the chosen SOAP transport in the classpath, i.e. axis.jar
  • Select the transport to use by setting system property org.uddi4j.transportClassName to the appropriate value as defined in the Configuration section.
  • If using the publish API, include an implementation of JSSE in the classpath. JSSE can be configured by editing the jre/lib/security/security.policy file within the JDK.
  • or, can be configured within the client program. The examples illustrate a method for configuring the security provider.

Building UDDI4J

  • Obtain ANT, SOAP, JDK as listed in the prerequisites.
  • Include at least one SOAP transport implementation in the classpath. The build will check for the presence of known SOAP transports in the classpath and build the associated support into the resulting jar file. Only those transports available at compile time will be supported by the resulting jar file.
  • Set required environment variables, including, JAVA_HOME, ANT_HOME.
  • From the root directory of UDDI4J (where build.xml is located), run
    ant target
    where target is one of the following:
    • compile: Compiles the API
    • samples: Compiles the samples
    • javadocs: Builds the javadoc
    • srcdist: Creates the source distribution zip file.
    • dist: Creates the binary distribution zip file.
    • clean: Removes built files.
    • all: Cleans, creates source and binary distribution zip files.

Samples:

A set of samples is provided to illustrate the basics of using the inquiry api, publish api, and error handling.

  • FindExample: The hello world of UDDI programs. Provides the simplest useful sample of a UDDI API.
  • SaveBusinessExample: A simple example using the publish API. Logs into the server using the get_authToken method, then attempts to save a business.
  • DeleteBusinessExample: Searches for a particular business using the inquiry API, finds the associated businesskey, logs into the server, then attempts to delete the business found.

How to run samples:

The samples require several pieces of information including the following:

  • InquiryURL: The URL of the UDDI server to run inquiries against must be specified.
  • PublishURL: The URL of the UDDI server to run publish requests. This is typically an SSL connection.
  • Userid: When publishing a userid is required for authentication.
  • Password: Password for the referenced userid. Refered to as a credential in UDDI speak.


A property file is used by the samples to read values that may need to be modified. This property file includes the values listed above, as well as a convenient way to set the system properties used by UDDI4J as described in Configuration.

To run the examples, set the classpath as described above, invoke java or jre with the desired sample program name. Example:

java FindBusinessExample

Reference:


IBM is a registered trademark of IBM, HP is a registered trademark of Hewlett-Packard Company

Copyright© IBM Corporation 2001, All rights reserved.