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diff --git a/TAO/docs/releasenotes/orbcore.html b/TAO/docs/releasenotes/orbcore.html deleted file mode 100644 index 7b9bb610870..00000000000 --- a/TAO/docs/releasenotes/orbcore.html +++ /dev/null @@ -1,246 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> - -<html> - <head> - <title>ORB & ORB Core Status</title> - </head> - - <HR> - <H3><A NAME="orb"></A>ORB & ORB Core</H3> - Point of contact: <A HREF="mailto:cleeland@cs.wustl.edu">Chris Cleeland</A> - -<P>Current status: - - <UL> - <LI> - Provides dynamically linked wholesale assignment of ORB - strategies for communication, concurrency, demultiplexing, - scheduling, and dispatching using the ACE Service - Configurator framework.</LI> - - <LI> - Supports several concurrency models out of the box: - Reactive, Thread-per-Connection, and ORB-per-thread. The - ORB-per-thread design is optimized for real-time I/O - subsystems.</LI> - </UL> - - Recently Completed Work: - - <UL> - <li>Placed an optimization in IIOP::Profile that should speed up - invocations on the client side rather substantially. This was - done by caching an instance of <code>ACE_INET_Addr</code> in the - private portion of <code>Profile</code> because the cost of - constructing one for every invocation (in - <code>TAO_GIOP_Invocation::start</code>) was simply - enormous--the construction was something like 100 cycles on - Solaris. This is all because deep down this ends up calling - <code>gethostbyname()</code>, which can be very costly. Of - course, this is platform-dependent, so the improvements may not - be as great on a different platform.</li> - - <li>Got rid of need to have compile in TSS ORB Core - (<code>-DTAO_HAS_TSS_ORBCORE</code>). This is accomplished by - having a Resource Factory (<code>TAO_Resource_Factory</code>) - singleton which the ORB Core consults in order to get pointers - to resources. The Resource Factory can be configured to return - pointers from thread-specific storage, or process-global - storage. By doing this, the ORB Core is shielded from ever - having to know whether or not its resources are global or - not.</li> - - <li>Made all command-line like options look like the - standard-professed options, i.e., <b>-ORBxxx</b> or - <b>-OAxxxx</b>.</li> - - <li>Moved ORB option parsing into - <code>TAO_ORB_Core::init()</code> rather than in - <code>ORB_init()</code>.</li> - - <li>Define <code>_FAR</code> for all cases as an interim fix - for LynxOS.</li> - - <li>Fixed TAO so that the default port of 5001 is defined in - <code>orb_core.h</code> config header somewhere rather than in - <code>orbobj.cpp</code>, and use <b>MAXHOSTNAMELEN</b> ACE - constant for the hostname buffer.</li> - - <li>Eliminated need for <code>CORBA::Object</code> to keep a - pointer to its orb sitting around anywhere.</li> - - <LI>Tested <code>CORBA_ORB::shutdown()</code> as a manner in - which a thread of control can request that - <code>CORBA_ORB::run()</code> should return and no longer - service requests. It only honors a - <em>wait_for_completion</em> argument of <b>FALSE</b> right - now because we haven't fully explored the issues which - surround doing all the completion.</li> - - <li>Fixed bugs reported by Steven Wohlever, David Miron, - Manojkumar Acharya.</li> - - <li>Created a brief section in <a - href="../../TAO-Install.html"><code>$TAO_ROOT/TAO-Install.html</code></a> - that <em>briefly</em> documents installation on Unix - platforms. There is also a brief section which documents - issues that apply across ALL platforms, such as the fact that - TAO and its application will likely not work well if your ACE - is linked through Orbix, VisiBroker, or another ORB. <a - href="../../ChangeLog">ChangeLog</a> discovery attribution for - this should go to <em>Steve Wohlever - <wohlever@mitre.org></em>.</li> - - <LI>Implemented <code>CORBA_ORB::shutdown()</code> as a manner - in which a thread of control can request that - <code>CORBA_ORB::run()</code> should return and no longer - service requests.</li> - - <LI>Validated movement of Strategy Connector into - ORB Core.</LI> - - <li>Debated details of <code>Svc_Handler</code> modifications - with Irfan.</li> - - <li>Tested and commited <code>Connector::connect_n</code> changes - to ACE</code>.</li> - - <li>ACE & TAO compiling cleanly using Sun's CC on Solaris and - G++ on Linux. Also, the ACE tests run properly.</li> - - <li>Use <code>truss</code> to verify for <a - href="mailto:PAUL.G.WEHLAGE@cdev.com">Paul Wehlage</a> that - TAO really uses <code>select</code> vs. <code>recv</code> for - <b>-R</b> vs. <b>-T</b>.</li> - - <li>Renamed <code>boa.*</code> to <code>poa.*</code>.</li> - - <LI>Renamed following files: Orb_Core.* ->orb_core.* - & orbobj.* -> corba_orb.*.</LI> - - <LI>The lock used in <code>giop.cpp:626</code> originally - appeared in the IIOP-1.4 code base. Its purpose was to - protect access to the <code>fwd_profile</code> data member. - The original features are available, but they are currently - not used because none of our concurrency models present a - thread-unsafe condition. The <a - href="../../ChangeLog">ChangeLog</a> presents more details on - the subject.</li> - - <li>Fixed problems seen by <a - href="mailto:brian.r.mendel@boeing.com">Brian Mendel</a> of - Boeing where the Cubit server application was crashing in - <code>TAO_OA_Connection_Handler::handle_message</code> when it - was trying to call <code>CORBA::POA::handle_request</code> - through a NULL <code>root_poa</code> pointer. The NULL - pointer resulted from the inadvertent use of the - Thread-per-Connection concurrency model, which is currently - incompatible with the ORB-per-thread model. It was not caught - because the change is normally done in configuration files - parsed by the Service Configurator, and VxWorks requires - special code in that area which was not tested until Boeing - got hold of the code.</li> - - <li>Clean up build under g++. All 'function used before - declared inline' warnings have been eliminated. Also, all - other warnings (except for one that is nearly unavoidable) - have been eliminated. - </li> - - <LI>Removed BOA and ROA names from the ORB.</LI> - - <LI>Changed <code>CORBA_ORB::open()</code> to return an error - status (first cut at this already there--needs to be checked - out).</LI> - - <LI>Added README file to multiCubit test.</li> - </UL> - - Ongoing Work: - - <UL> - <LI>Verify ACE & TAO on Linux.</LI> - - <LI>Use Purify to eliminate straggling problems.</LI> - - </UL> - - Current Work: - - <UL> - <LI>Clean up the internals and analyze for performance bottlenecks using Quantify.</LI> - - <LI> - <p> - Verify that, in the ORB-per-thread concurrency model, it's - possible to have a factory in each thread that creates a - client and returns an object reference to that client - within that thread. This is different from the model that - Sumedh originally had where the factory was trying to turn - out a client in a separate thread/ORB combination.</p> - <p> - There is no application which attempts this at the moment, - so both a client and a server will need to be - manufactured. Using existing Cubit-like examples (that - poor app is so weary) should reduce development time to a - couple of hours.</p> - <p> - The real strategy/solution is to make - <code>CORBA::Object</code> not keep a pointer to its orb - sitting around anywhere. It should only get it when it - needs it. This should not be difficult to change.</p> - </LI> - </UL> - - Critical Work: - - <UL> - <LI>Add pre-cached connection on client side. Clients will - pass in a comma-separated list of <em>host:port</em> - destinations using the <code>CORBA::ORB_init()</code> - interface.</LI> - - <LI>Support new concurrency models, e.g., - Thread-per-Request.</LI> - - </UL> - - Future work: - <UL> - <li>Make argument parsing with the orb consume the arguments it parses.</li> - - <li>Remove <code>_FAR</code> from all code.</li> - - <li>Update ORB Patterns paper to reflect the latest TAO has to - offer. Specifically, sections on the Abstract Factory and - Concurrency strategies need to be updated, and the entire - paper needs to be reviewed for accuracy w.r.t the current - TAO.</li> - - <li>Make the section in <a - href="../../TAO-Install.html"><code>$TAO_ROOT/TAO-Install.html</code></a> - that documents installation on Unix platforms more complete. - </li> - - <li>Improve the <code>Service Configurator</code> service - entry faking on VxWorks.</li> - - <LI>Integrate the <A HREF="#poa">POA</A> implementation.</LI> - - <LI>Add support for <TT>resolve_initial_references</TT> using - ACE support for UDP broadcast.</LI> - - <LI>Assist in porting higher level services (e.g., <A - HREF="#eventchannel">Event Channel</A>) to TAO.</LI> - - <li>Compile and verify ACE and TAO on Linux using the Kuck and - Associates, Inc. (KAI) compiler tools.</li> - - <LI> Remove the CORBA_SEQUENCE structure which is not a true C++ - mapping of sequences. This will affect the code that uses - OctetSequences and TC_opaque. </LI> - - </UL> - - </body> -</html> |