Can't have multiple bloom filters and reconnect to existing bloom filters in Redis

[ankbul]

Hi,

I'm in a distributed environment where servers will be adding to shared bloom filters. Currently, there's no way to reference an existing bloom filter if a server disconnects and then wants to reconnect. It seems as if two instantiations will connect to the same bloom filter.

For example, consider this use-case:

CBloomFilterRedisBits<String> f1 = new CBloomFilterRedisBits<>(host, port, 100, 0.1, 4);
f1.add("dog");

CBloomFilterRedisBits<String> f2 = new CBloomFilterRedisBits<>(host, port, 100, 0.1, 4);
f2.add("cat");

f1.contains("dog"); // returns true, as expected
f1.contains("cat"); // also returns true, which is unexpected. It should not contain cat.

f2.contains("dog"); // also returns true, which is unexpected. It should not contain dog.
f2.contains("cat"); // return true, as expected

What is needed is an ability to associate a key to the bloom filter. That would allow us to reference the bloom filter after a disconnect.

[ankbul]

I've hacked a solution to this problem by implementing a key provider. You can view the changeset here:

https://github.com/scopely/Orestes-Bloomfilter/tree/redis-bits-multiple-filter-support

[DivineTraube]

Hi thanks for your code. We are adding this feature (to be released next week). It will introduce named Bloom filters as well as better concurrency and error handling.

[DivineTraube]

Hi, you can now have multiple Bloomfilters!