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From David Wood <daw...@us.ibm.com>
Subject configuration file loading problem
Date Thu, 09 Jun 2011 13:28:19 GMT
Hi,

I'm considering using JCS 1.3  for a distributed registry in a Mobile 
Adhoc Network (MANET), with the following requirements:

1) No central server
2) More than one JVM per ip address

There may be more, but those are the ones that I think cause the most 
trouble.  So the first question: Can JCS do this (particularly 2)?  I've 
looked at the UDP discovery and Lateral TCP, which together suggest that 
it can. 

Next, I've tried to build a simple program that creates a cache, but it 
throws an exception about loading the config file....

./dsm-jcs.ccf exists.
Jun 9, 2011 9:26:38 AM org.apache.jcs.engine.control.CompositeCacheManager 
getUnconfiguredInstance
INFO: Instance is null, creating with provided config
Jun 9, 2011 9:26:38 AM org.apache.jcs.engine.control.CompositeCacheManager 
configure
INFO: Creating cache manager from config file: ./dsm-jcs.ccf
Jun 9, 2011 9:26:38 AM org.apache.jcs.engine.control.CompositeCacheManager 
configure
SEVERE: Failed to load properties for name [./dsm-jcs.ccf]
Exception in thread "main" java.lang.IllegalStateException: Failed to load 
properties for name [./dsm-jcs.ccf]
        at org.apache.jcs.engine.control.CompositeCacheManager.configure(
CompositeCacheManager.java:242)
        at org.apache.jcs.JCS.ensureCacheManager(JCS.java:102)
        at org.apache.jcs.JCS.getInstance(JCS.java:64)
        at Anything.main(Anything.java:21)

I'm running this from within Eclipse and the code is as follows:

        public static void main(String argv[]) throws CacheException {
                String cfg = "./dsm-jcs.ccf";
                File f = new File(cfg);
                if (f.exists())
                        System.err.println(cfg + " exists.");
                else
                        System.err.println(cfg + " does NOT exist.");
                JCS.setConfigFilename("./dsm-jcs.ccf");
            JCS jcs = JCS.getInstance("DSM"); 
            jcs.put("me", "here");
        }

with ./dsm-jcs.ccf file located in the Eclipse project directory (where 
the main() is being run). 


Thanks in advance for you help.


David Wood 
Computing Systems for Wireless Networks
IBM TJ Watson Research Center
dawood@us.ibm.com
914-784-5123 (office), 914-396-6515 (mobile)

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