Have found some potential performance or stability issues associated
with lots of mutex blocking in getting a parent span's context. Want
the ability to totally disable tracing to help debugging.
trying to separate internal an external concerns in pilosa.Server - it should
handle Cluster, Holder, etc. while pilosa/server handles things with external
deps - e.g. Logger, Stats, Handler, etc. Using functional options in
pilosa.Server now.
and it moves the file handling (open/close) out of the main Command and
into the interface implementation. The Logger implementations both have
a `Logger()` method which returns their internal logger (`*log.Logger`).
This is because the gossip setup (memberlist) needs a `*log.Logger` for
its configuration.
Renames `config` to `generate-config` and implements a new `config`
command that generates the configuration file based on the current
state instead of printing a static string.
A configurable limit has been added to restrict the number of
mutating calls in a `pql.Query`. This is to prevents requests from
timing out from large queries.
The default is set to 5000 writes per request and is configurable
through the configuration file and the command line flags.
It is nested under "cluster" in the config, and it controls cluster membership
as well as broadcasting, so I think type is more appropriate. Also, brevity.
Primary message interface is the MessageBroker which is an attribute of the Messenger.
MessageBroker implementations:
- Gossip (memberlist)
- Broadcast (uses HTTP, received by existing Handler)
- Static (no-ops)
Changes CacheSize from `int` to `uint32` for consistency with protobuf.
Removes unnecessary dependencies in glide:
- `github.com/aws/aws-sdk-go`
- `golang.org/x/net` (although this gets included by memberlist)
TODO:
- [ ] Add tests around the Messenger and MessageBroker objects.
- [ ] Refactor CreateSliceMessage to work with views.
- [ ] Support propogation of meta data on PATCH calls.
fixing some issues from last rebase
had to work around a bunch of viper nonsense with handling string slices
changed the validator.Check to use reflect.DeepEqual
fixed a bug where env vars need to be reset between tests
had to change the structure of pilosa.config to enable the passing of hosts as a
slice of strings (it was a slice of structs which each just contained the string
host.) so we lose some generality, but we weren't using it anyway.
