vmstats_ex v0.2.1 VMStatsEx.Statix View Source
Link to this section Summary
Functions
Returns a specification to start this module under a supervisor
Opens the connection to the StatsD-compatible server
Decrements the StatsD counter identified by key by the given value
Writes to the StatsD gauge identified by key
Writes value to the histogram identified by key
Increments the StatsD counter identified by key by the given value
Invoked when the server is started. start_link/3 or start/3 will
block until it returns
Measures the execution time of the given function and writes that to the
StatsD timing identified by key
Writes the given value to the StatsD set identified by key
Writes the given value to the StatsD timing identified by key
Link to this section Functions
Returns a specification to start this module under a supervisor.
See Supervisor.
Opens the connection to the StatsD-compatible server.
The configuration is read from the configuration for the :statix application
(both globally and per connection).
Callback implementation for Statix.connect/0.
Decrements the StatsD counter identified by key by the given value.
Works same as c:increment/3 but subtracts value instead of adding it. For
this reason value should be zero or negative.
Examples
iex> MyApp.Statix.decrement("open_connections", 1, [])
:ok
Callback implementation for Statix.decrement/3.
Writes to the StatsD gauge identified by key.
Examples
iex> MyApp.Statix.gauge("cpu_usage", 0.83, [])
:ok
Callback implementation for Statix.gauge/3.
Writes value to the histogram identified by key.
Not all StatsD-compatible servers support histograms. An example of a such server statsite.
Examples
iex> MyApp.Statix.histogram("online_users", 123, [])
:ok
Callback implementation for Statix.histogram/3.
Increments the StatsD counter identified by key by the given value.
value is supposed to be zero or positive and c:decrement/3 should be
used for negative values.
Examples
iex> MyApp.Statix.increment("hits", 1, [])
:ok
Callback implementation for Statix.increment/3.
Invoked when the server is started. start_link/3 or start/3 will
block until it returns.
args is the argument term (second argument) passed to start_link/3.
Returning {:ok, state} will cause start_link/3 to return
{:ok, pid} and the process to enter its loop.
Returning {:ok, state, timeout} is similar to {:ok, state}
except handle_info(:timeout, state) will be called after timeout
milliseconds if no messages are received within the timeout.
Returning {:ok, state, :hibernate} is similar to
{:ok, state} except the process is hibernated before entering the loop. See
c:handle_call/3 for more information on hibernation.
Returning :ignore will cause start_link/3 to return :ignore and the
process will exit normally without entering the loop or calling c:terminate/2.
If used when part of a supervision tree the parent supervisor will not fail
to start nor immediately try to restart the GenServer. The remainder of the
supervision tree will be (re)started and so the GenServer should not be
required by other processes. It can be started later with
Supervisor.restart_child/2 as the child specification is saved in the parent
supervisor. The main use cases for this are:
- The
GenServeris disabled by configuration but might be enabled later. - An error occurred and it will be handled by a different mechanism than the
Supervisor. Likely this approach involves callingSupervisor.restart_child/2after a delay to attempt a restart.
Returning {:stop, reason} will cause start_link/3 to return
{:error, reason} and the process to exit with reason reason without
entering the loop or calling c:terminate/2.
Callback implementation for GenServer.init/1.
Measures the execution time of the given function and writes that to the
StatsD timing identified by key.
This function returns the value returned by function, making it suitable for
easily wrapping existing code.
Examples
iex> MyApp.Statix.measure("integer_to_string", [], fn -> Integer.to_string(123) end)
"123"
Callback implementation for Statix.measure/3.
Writes the given value to the StatsD set identified by key.
Examples
iex> MyApp.Statix.set("unique_visitors", "user1", [])
:ok
Callback implementation for Statix.set/3.
Writes the given value to the StatsD timing identified by key.
value is expected in milliseconds.
Examples
iex> MyApp.Statix.timing("rendering", 12, [])
:ok
Callback implementation for Statix.timing/3.