Adopt termui framework and gnatsd 0.6.4 changes

[wallyqs]

This is a rewrite of the nats-top tool using the gizak/termui framework.
It also adopts the latest changes in gnatsd monitor server to make it possible to query the server using limit and sort options and displaying slow consumers:

gnatsd version 0.6.4 (uptime: 31m42s)
Server:
  Load: CPU: 0.8%   Memory: 5.9M  Slow Consumers: 0
  In:   Msgs: 34.2K  Bytes: 3.0M  Msgs/Sec: 37.9  Bytes/Sec: 3389.7
  Out:  Msgs: 68.3K  Bytes: 6.0M  Msgs/Sec: 75.8  Bytes/Sec: 6779.4

Connections: 4
  HOST                 CID      SUBS    PENDING     MSGS_TO     MSGS_FROM   BYTES_TO    BYTES_FROM  LANG     VERSION
  127.0.0.1:56134      2        5       0           11.6K       11.6K       1.1M        905.1K      go       1.1.0
  127.0.1.1:56138      3        1       0           34.2K       0           3.0M        0           go       1.1.0
  127.0.0.1:56144      4        5       0           11.2K       11.1K       873.5K      1.1M        go       1.1.0
  127.0.0.1:56151      5        8       0           11.4K       11.5K       1014.6K     1.0M        go       1.1.0

Help message with more info on the feature set:

- o [option]

Set primary sort key to [option]:

Keyname may be one of: {cid, subs, msgs_to, msgs_from, bytes_to, bytes_from}

This can be set in the command line too, e.g. nats-top -sort bytes_to

- n [limit]

Set sample size of connections to request from the server.

This can be set in the command line as well: nats-top -n 1 Note that
if used in conjunction with sort, the server would respect both
options enabling queries like connection with largest number of
subscriptions: nats-top -n 1 -sort subs

- ?

Show help message with options.

- q

Quit nats-top.

[derekcollison]

I really like this but think it should be a separate tool, with the original keeping the "top" like familiarity..

[wallyqs]

Ok it would be simple to remove the graphs part as a different tool (nats-htop?) and just include the gnatsd 0.6.4 changes (slow consumers, pending size, sort+limit, etc...) in this PR, I will update it.

[derekcollison]

I think that is good, not sure what to call the new terminal/graph one yet,
but let's keep nats-top like linux top with 0.6.4 changes.

On Mon, Aug 17, 2015 at 9:00 PM, Waldemar Quevedo notifications@github.com
wrote:

Ok it would be simple to remove the graphs part as a different tool
(nats-htop?) and just include the gnatsd 0.6.4 changes (slow consumers,
pending size, sort+limit, etc...) in this PR, I will update it.

—
Reply to this email directly or view it on GitHub
#7 (comment).

[wallyqs]

Updated the branch to focus on having top like functionality and 0.6.4 changes, ok let me think a bit further on the name for the nats tool with graphs too.

[derekcollison]

ok so is this good to merge?

[wallyqs]

Just made an update to clear the message shown on invalid sort options, ok to merge now. Thanks.