.NET/Java PDF, Tiff, Barcode SDK Library

Microsoft currently supports them both The standards bodies worked on the specs for XML Messaging for so long that the rankand-file IT masses wrote it off Yeah, yeah, yeah It s another flash-in-the-pan technology Remember Microsoft Bob Remember My Services Eventually the W3C adopted SOAP (and renamed it the XML Protocol ) It finalized the spec for the Web Service Description Language (WSDL) The OASIS group created a specification for discovery it dubbed the Universal Description, Discovery, and Integration protocol (read: search engine for services: UDDI) The funny thing is, in the last couple of years the standards have become ready for prime time Designs for new things require time and iterations The first iteration is done and over with The specs have been adopted and vendors have done a couple of implementations They ve realized what doesn t work and created stacks that do.

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grant select on v_$session_cursor_cache to benchmark;

One of the problems with meta-programming with explicit <@ ... @> quotation marks alone is that you can t analyze very large programs because the entire expression to be analyzed must be delimited by these markers. This is solved in F# by allowing you to tag top-level member and let bindings as reflected. This ensures that their definition is persisted to a table attached to their compiled DLL or EXE. These functions can also be executed as normal F# code. For example, here is a function whose definition will be persisted: [<ReflectedDefinition>] let poly x = x+2.0*x+3.0/(x*x) The definitions can be retrieved using the ResolvedTopDefnUse active pattern, as shown in Listing 9-11. You can now use this function in a regular <@ ... @> quotation and thus analyze it for errors: > errorEstimate <@ poly @> (3.0, 0.1);; val it : float * Error = 9.33333 0.582149 > errorEstimate <@ poly @> (30271.3, 0.0001);; val it : float * Error = 90813.9 3.02723

select on v_$sesstat to benchmark; select on v_$open_cursor to benchmark; select on v_$sql to benchmark; select on v_$sqlarea to benchmark; create any context to benchmark; drop any context to benchmark; select on sys.col$ to benchmark; -- query data dict select on sys.dba_segments to benchmark; -- for block dump select on v_$process to benchmark

Folks are adopting parts of the SOAP spec in favor of others because they ve tried them both and know from experience what works The enterprises that wrote their own stacks years ago now have vendor-supplied tools that provide a standards-based SOAP Stack implementation It works And it is going to transform the way applications are created, deployed, and consumed It just took awhile Today implementing your own SOAP Stack would be like implementing your own database transaction processing You d be reinventing the wheel, as there s already a stack available for your platform (regardless of what that is) When you re using NET, there s a SOAP stack built into the ASP NET Framework.

Note You can find more information on using F# quotations for meta-programming at http://

We ll also make use of other performance tools throughout the book. This section presents brief setup instructions for these tools.

Summary

The timed_statistics parameter specifies whether Oracle should measure the execution time for various internal operations. Without this parameter set, there is much less value to the trace file output. As with other parameters, you can set timed_statistics either on an instance level (in init.ora) or on a session level. The former shouldn t affect performance, so it s generally recommended. Simply add the following line to your init.ora file, and the next time you restart the database, timed_statistics will be enabled: timed_statistics=true On a session level, you would issue this SQL> alter session set timed_statistics=true; Use the preceding method to set this parameter from your JDBC programs when required.

Remember that engineer who wrote the custom SOAP stack for the product he was working on in the late nineties Today he s the program manager for XML Web Services at a little company out west, in Redmond, Washington, I believe Guess that vision thing works out sometimes It just doesn t always happen right away..