Complex method Lusnoc::Watcher#run (26.8) Open
def run(max_consul_wait: nil)
logger.debug "Watch #{@base_url} with #{@timeout.inspect} timeout"
last_x_consul_index = 1
Timeouter.loop!(@timeout, eclass: @eclass, message: @emessage) do |t|
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Flog calculates the ABC score for methods. The ABC score is based on assignments, branches (method calls), and conditions.
You can read more about ABC metrics or the flog tool
Lusnoc::Watcher#run has approx 12 statements Open
def run(max_consul_wait: nil)
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A method with Too Many Statements
is any method that has a large number of lines.
Too Many Statements
warns about any method that has more than 5 statements. Reek's smell detector for Too Many Statements
counts +1 for every simple statement in a method and +1 for every statement within a control structure (if
, else
, case
, when
, for
, while
, until
, begin
, rescue
) but it doesn't count the control structure itself.
So the following method would score +6 in Reek's statement-counting algorithm:
def parse(arg, argv, &error)
if !(val = arg) and (argv.empty? or /\A-/ =~ (val = argv[0]))
return nil, block, nil # +1
end
opt = (val = parse_arg(val, &error))[1] # +2
val = conv_arg(*val) # +3
if opt and !arg
argv.shift # +4
else
val[0] = nil # +5
end
val # +6
end
(You might argue that the two assigments within the first @if@ should count as statements, and that perhaps the nested assignment should count as +2.)
Lusnoc::Watcher#run calls 'resp.body' 2 times Open
return true if yield(resp.body)
logger.debug "Watch #{@base_url} response: #{resp.body}"
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Duplication occurs when two fragments of code look nearly identical, or when two fragments of code have nearly identical effects at some conceptual level.
Reek implements a check for Duplicate Method Call.
Example
Here's a very much simplified and contrived example. The following method will report a warning:
def double_thing()
@other.thing + @other.thing
end
One quick approach to silence Reek would be to refactor the code thus:
def double_thing()
thing = @other.thing
thing + thing
end
A slightly different approach would be to replace all calls of double_thing
by calls to @other.double_thing
:
class Other
def double_thing()
thing + thing
end
end
The approach you take will depend on balancing other factors in your code.
Lusnoc::Watcher#run calls 't.left' 2 times Open
wait_condition = build_wait_condition(@base_url, t.left, max_consul_wait)
url = "#{@base_url}?index=#{last_x_consul_index}#{wait_condition}"
resp = Lusnoc.http_get(url, timeout: t.left)
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Duplication occurs when two fragments of code look nearly identical, or when two fragments of code have nearly identical effects at some conceptual level.
Reek implements a check for Duplicate Method Call.
Example
Here's a very much simplified and contrived example. The following method will report a warning:
def double_thing()
@other.thing + @other.thing
end
One quick approach to silence Reek would be to refactor the code thus:
def double_thing()
thing = @other.thing
thing + thing
end
A slightly different approach would be to replace all calls of double_thing
by calls to @other.double_thing
:
class Other
def double_thing()
thing + thing
end
end
The approach you take will depend on balancing other factors in your code.
Lusnoc::Watcher has no descriptive comment Open
class Watcher
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Classes and modules are the units of reuse and release. It is therefore considered good practice to annotate every class and module with a brief comment outlining its responsibilities.
Example
Given
class Dummy
# Do things...
end
Reek would emit the following warning:
test.rb -- 1 warning:
[1]:Dummy has no descriptive comment (IrresponsibleModule)
Fixing this is simple - just an explaining comment:
# The Dummy class is responsible for ...
class Dummy
# Do things...
end
Lusnoc::Watcher#build_wait_condition calls 'max_consul_wait.to_i' 2 times Open
max = [time_left.to_i, max_consul_wait.to_i].max
"&wait=#{max}s"
elsif max_consul_wait
"&wait=#{max_consul_wait.to_i}s"
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Duplication occurs when two fragments of code look nearly identical, or when two fragments of code have nearly identical effects at some conceptual level.
Reek implements a check for Duplicate Method Call.
Example
Here's a very much simplified and contrived example. The following method will report a warning:
def double_thing()
@other.thing + @other.thing
end
One quick approach to silence Reek would be to refactor the code thus:
def double_thing()
thing = @other.thing
thing + thing
end
A slightly different approach would be to replace all calls of double_thing
by calls to @other.double_thing
:
class Other
def double_thing()
thing + thing
end
end
The approach you take will depend on balancing other factors in your code.
Lusnoc::Watcher#build_wait_condition doesn't depend on instance state (maybe move it to another class?) Open
def build_wait_condition(_url, time_left, max_consul_wait)
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A Utility Function is any instance method that has no dependency on the state of the instance.
Lusnoc::Watcher#run has the variable name 't' Open
Timeouter.loop!(@timeout, eclass: @eclass, message: @emessage) do |t|
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An Uncommunicative Variable Name
is a variable name that doesn't communicate its intent well enough.
Poor names make it hard for the reader to build a mental picture of what's going on in the code. They can also be mis-interpreted; and they hurt the flow of reading, because the reader must slow down to interpret the names.