Add proxy cache on CassandraPathDB

[yma96]

Note: getProxySitesCache is used for cache layer for db query, to avoid frequent query for each download, it could be clean for Proxy Site delete request, could check the detail on galley commit.

[ruhan1]

I believe this is not the proper place to add this code. PathDB library is only for path mapping storage. imo, anything for proxy settings should be put in content service (indy). We have something similar in Indy to operate Cassandra, like CassandraNotFoundCache. You may refer to it.

[yma96]

@ruhan1, I'm afraid it's hard to implement from Indy, since it's the http job called from Galley, and we do need a cache layer from there, I don't think it's a good way to loop call Indy from Galley, WDYT?

[ruhan1]

@ruhan1, I'm afraid it's hard to implement from Indy, since it's the http job called from Galley, and we do need a cache layer from there, I don't think it's a good way to loop call Indy from Galley, WDYT?

If Galley use it, how about implement it in Galley?

[yma96]

@ruhan1, that means the db cache part of code could not be re-used if implement only from galley, I get your point about this, I'll try to figure out and peel these from pathmap then setup a separate keyspace to store the proxy data rather than indystorage.

[ruhan1]

@ruhan1, that means the db cache part of code could not be re-used if implement only from galley, I get your point about this, I'll try to figure out and peel these from pathmap then setup a separate keyspace to store the proxy data rather than indystorage.

yeah, just copy some code or ref to the cassandra code in indy. Using a different keyspace is good. Some other services use their own keyspace too, like repo, folo.

[yma96]

@ruhan1, yep, make sense, thanks.

[sswguo]

As @ruhan1 mentioned the NotFoundCache, I think we can introduce our cache in the same way, declare the interface in gally, and implement it in indy.

Ref: https://github.com/Commonjava/galley/blob/master/api/src/main/java/org/commonjava/maven/galley/spi/nfc/NotFoundCache.java

Let's discuss it in the meeting.