Database call out webservices with JDeveloper - help

Hi all,
I am using JDeveloper 10.1.3.0 to generate java proxies for web services and deploy them to my Oracle 10g Enterprise Edition database.
I am able to create the proxy and test the web service, it works fine. When I create a deployment profile and deploy, everything succeeds, I am able to see the PL/SQL wrapper function in the database. However, when I execute the function, I get an error class name <my java classname> not found. This is a case when I execute a web service that runs on our server and requires authentication. I have provided the authentication in the setUsername and setPassword methods of the java proxy.
When I try to do the same with a stock quote web service, I do not get an error, but there is no output either. It returns nothing.
Is this an issue because of the jdk version problem? My database jvm is jdk1.4 compliant and the JDeveloper is 1.5 compliant. But I think there is somehting very basic that I am missing. Can experts please help me with this, I have been struggling for long!
Thank you very much. Any help is greatly appreciated.
Regards,
Nithya

I have still not figured this one out. Any help please?
Regards,
Nithya

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But is that really important? Consider that the UI has to make a network call to the API; that's pretty big (order of magnitude of milliseconds). Databases are optimized to keep things in memory
and execute reads very, very quickly (eg. SQL Server loads and keeps everything in RAM and consumes almost all your free RAM if it can).
The Logic
In theory, you are correct. However, there are a few flaws with this rationale:
From what you stated, it's unclear if you actually tested / profiled your app. In other words, do you actually know that
the network transfers from the app to the API are the slowest component? Because that is intuitive, it is easy to assume that it is. However, when discussing performance, you should never assume. At my employer, I am the performance lead. When I first joined,
people kept talking about CDN's, replication, etc. based on intuition about what the bottlenecks must be. Turns out, our biggest performance problems were poorly performing database queries.
You are saying that because databases are good at retrieving data, that the database is necessarily running at peak performance, is being used optimally, and there is nothing that can be done
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This way of thinking assumes a single process at a time, or put another way, no concurrency. It assumes that one request cannot influence another request's performance. Resources are shared,
such as disk I/O, network bandwidth, connection pools, memory, CPU cycles, etc. Therefore, reducing one database call's use of a shared resource can prevent it from causing other requests to slow down. When I first joined my current employer, management believed
that tuning a 3 second database query was a waste of time. 3 seconds is so little, why waste time on it? Wouldn't we be better off with a CDN or compression or something else? But if I can make a 3 second query run in 1 second, say by adding an index, that
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The Theory
There is a common conception that software performance is simply about speed.
From a purely speed perspective, you are right. A system is only as fast as its slowest component. If you have profiled your code and found that the Internet is the slowest component, then everything else is obviously not the slowest part.
However, given the above, I hope you can see how resource contention, lack of indexing, poorly written code, etc. can create surprising differences in performance.
The Assumptions
One last thing. You mentioned that a database call should be cheap compared to a network call from the app to the API. But you also mentioned that the app and the API servers are in the same LAN. Therefore, aren't both of them comparable as network calls? In
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that they are orders of magnitude different.
Where it gets murkey
This whole question is about "multiple" versus "single" database calls. But it's unclear how many are multiple. Because of what I said above, as a general rule of thumb, I recommend making as few database calls as necessary. But that is
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Here is why:
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Sometimes to achieve good decoupling, you want to have 2 database calls separated. For example, perhaps every HTTP request is routed through a generic security filter which validates from the DB that the user has the right access rights. If they do, proceed
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Sometimes there are things your app is better at, like some complex calculations. You may need to read some data from the database, do some calculations, then based on the results, pass a parameter to a second database call (maybe to write some results). If
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TL;DR
TLDR: Is it really significant to worry about multiple database calls when we are already making a network call over the LAN? If so, why?
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create or replace procedure ipm40_send_bekendmaking(p_bdmg_id in number)
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-- t_output varchar2(2000);
t_start number := 1;
t_body_lengte number;
t_chunkdata varchar2(4000);
t_tijd_1 varchar2(256);
t_tijd_2 varchar2(256);
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commit;
end;
===THE RESPOND=============
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
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Transfer-Encoding: chunked
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Invalid Request
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</UL>
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<UL>
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