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HFactory.getOrCreateCluster succeeds with a wrong cluster name

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Started 1 year ago by
Latest reply from nickmbailey
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Anonymous
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Hi all,

I'm new to Cassandra and Hector, and I have a doubt about managing clusters.

I have installed a test environment in windows and executed the Datastax installer.
Cassandra starts and works perfectly, I also run opsCenter, and I can see that the Cluster is named "Test Cluster".
Now I do the following (in a java class):
cluster = HFactory.getOrCreateCluster("My Cluster", "localhost:9160");
logger.log(Level.INFO, "Found Cluster named: {0}", cluster.getName());

I thought that Hector would thrown an error, as I'm trying to open a cluster with the wrong name. But, unexpectedly (at least for me), everything works fine, and the name reported in the log is "My Cluster".

This behavior is not clear to me, in particular, if it works like that, why should we pass the cluster name to the getOrCreateCluter function?

I'm rather confused, any help is appreciated.

Thanks in advance,
Giorgio

Posted 1 year ago #
nickmbailey
Key Master

In this instance, the name you pass to getOrCreateCluster is just used internally by hector to keep track of clusters that have been created. It doesn't actually relate to the name of your cassandra cluster.

The purpose of the name in this case is so that you can call 'HFactory.getOrCreateCluster("My Cluster", "localhost:9160");' in multiple places in your code and it will return the same cluster object.

Posted 1 year ago #
Anonymous
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Posted 1 year ago #

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