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Add current_connections and peak_connections stats to TCP Input #163

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Add current_connections and peak_connections stats to TCP Input #163

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19 changes: 17 additions & 2 deletions lib/logstash/inputs/tcp.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,8 @@ def initialize(*args)
@client_socket = nil
@connection_sockets = {}
@socket_mutex = Mutex.new
@metric = @input.metric
@peak_connection_count = Concurrent::AtomicFixnum.new(0)

@ssl_context = nil
end
Expand Down Expand Up @@ -353,12 +355,25 @@ def server_socket
end

def add_connection_socket(socket)
@socket_mutex.synchronize{@connection_sockets[socket] = true}
@socket_mutex.synchronize{@connection_sockets[socket] = true; increment_connection_count}
socket
end

def delete_connection_socket(socket)
@socket_mutex.synchronize{@connection_sockets.delete(socket)}
@socket_mutex.synchronize{@connection_sockets.delete(socket); decrement_connection_count}
end

def increment_connection_count
current_connection_count = @connection_sockets.size
@metric.gauge(:current_connections, current_connection_count)
if current_connection_count > @peak_connection_count.value
@peak_connection_count.value = current_connection_count
@metric.gauge(:peak_connections, @peak_connection_count.value)
end
end

def decrement_connection_count
@metric.gauge(:current_connections, @connection_sockets.size)
end

def connection_sockets
Expand Down