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root/i-scream/projects/cms/documentation/papers/corba.txt
Revision: 1.2
Committed: Sun Aug 1 10:39:54 2004 UTC (20 years, 4 months ago) by tdb
Content type: text/plain
Branch: MAIN
CVS Tags: HEAD
Changes since 1.1: +2 -2 lines
Log Message:
Catch a lot of old URL's and update them. Also remove a couple of old files
that aren't used.

File Contents

# Content
1 Using CORBA
2 ===========
3
4 Contents
5 --------
6 - Setting up JacORB
7 - Getting jacorb.properties
8 - Running applications with JacORB
9 - Future Additions
10
11 tdb1, 09/11/00.
12
13 Setting up JacORB
14 -----------------
15 NOTE: There are no instructions for setting this up on the
16 public pc's. You probably don't want to anyway :)
17
18 JacORB is quite quick and easy to setup on raptor. All it
19 takes is a few path modifications, and an alteration to your
20 classpath. These are probably easiest added to your .cshrc.
21
22 Firstly add the following to your PATH. It should be added
23 at the front in case there's another IDL compiling lurking
24 around.... (which there is on raptor).
25
26 /usr/local/work/co610/JacORB/bin
27
28 Then you need to add the following to your CLASSPATH.
29 Chances are it was never set in the first place, so just
30 bung this in. Don't forget the dot at the end !
31
32 /usr/local/work/co610/JacORB/lib/idl.jar:
33 /usr/local/work/co610/JacORB/lib/jacorb.jar:.
34
35 (This should all be on ONE LINE!)
36
37 That should have you ready to go. You just need the
38 jacorb.properties file... see below.
39
40 On killigrew just replace "/usr/local/work/co610/JacORB"
41 with "/usr/local/JacORB" in all three places it occurs in
42 above paths.
43
44 Getting jacorb.properties
45 -------------------------
46 JacORB reads it's configuration from a text file called
47 jacorb.properties. This file should reside in your home
48 directory (either /home/cut/username or ~/) and be readable
49 by JacORB.
50
51 In particular this file contains URLs to get locate various
52 CORBA services, the most important being the Name Service.
53 The URL points to a file on a webserver which contains a
54 stringified CORBA object reference which the Java software
55 can make use of.
56
57 The servers themselve are running on Killigrew, and the
58 object references are on the webserver on the same machine.
59 You can download a copy of jacorb.properties from the
60 following address. You'll probably need to right-click and
61 save it.
62
63 http://killigrew.ukc.ac.uk/jacorb.properties
64
65 Alterantively, on raptor;
66
67 cd ~
68 wget http://killigrew.ukc.ac.uk/jacorb.properties
69
70 NOTE: These CORBA services and the webserver are only
71 available from the UKC network.
72
73 Running applications with JacORB
74 --------------------------------
75 Compiling applications is as a normal program, using javac.
76 However, to run a program you should use jaco instead of
77 java. All this does is fire up a few other things... I don't
78 know what off hand... it just works :)
79
80 A common thing to want to change is the amount of debugging
81 info sent back to you by JacORB. The default in the above
82 jacorb.properties file is 0, but you can set it with higher
83 values (3 may be the highest). The lower the number the less
84 info you get. Setting it to 1 gives some nice info about the
85 various connections going on. The value in jacorb.properties
86 you need to change is;
87
88 jacorb.verbosity=0
89
90 Future Additions
91 ----------------
92 Hopefully, if I have time, I will add some brief snippets of
93 code to get going with CORBA. In the mean time, the example
94 on the CO610 homepage is a good start :)
95
96 About
97 -----
98 This document was written by Tim Bishop [tdb@i-scream.org] for
99 use by the team working on a 3rd year Computer Science
100 project called "i-scream". More details can be found on the
101 project website;
102
103 http://www.i-scream.org