beaker v0.0.1 → Overview → Beaker → Counter

Beaker.Counter

Beaker.Counter is a signed bi-directional integer counter. It can keep track of integers and increment and decrement them.

It is commonly used for metrics that keep track of some cumulative value.

Examples are:

Source

Summary↑

decr(key)

Decrements the specified counter by 1
decr_by(key, amount)

Decrements the specified counter by the specified amount
get(key)

Retrieves the current value of the specified counter
incr(key)

Increments the specified counter by 1
incr_by(key, amount)

Increments the specified counter by the specified amount
set(key, value)

Sets the value of the specified counter to the specified value

Functions

decr(key)
(function) # ↑

Decrements the specified counter by 1.

Parameters

  • key: The name of the counter to decrement.

Examples

iex> Beaker.Counter.get("decr_counter")
nil
iex> Beaker.Counter.decr("decr_counter")
:ok
iex> Beaker.Counter.get("decr_counter")
-1

Returns :ok.

Source
decr_by(key, amount)
(function) # ↑

Decrements the specified counter by the specified amount.

Parameters

  • key: The name of the counter to decrement.
  • amount: The amount to decrement by.

Examples

iex> Beaker.Counter.get("decr_by_counter")
nil
iex> Beaker.Counter.decr_by("decr_by_counter", 10)
:ok
iex> Beaker.Counter.get("decr_by_counter")
-10

Returns :ok.

Source
get(key)
(function) # ↑

Retrieves the current value of the specified counter.

Parameters

  • key: The name of the counter to retrieve.

Examples

iex> Beaker.Counter.set("get_counter", 10)
:ok
iex> Beaker.Counter.get("get_counter")
10

Returns count where count is an integer if the counter exists, else nil.

Source
incr(key)
(function) # ↑

Increments the specified counter by 1.

Parameters

  • key: The name of the counter to increment.

Examples

iex> Beaker.Counter.get("incr_counter")
nil
iex> Beaker.Counter.incr("incr_counter")
:ok
iex> Beaker.Counter.get("incr_counter")
1

Returns :ok.

Source
incr_by(key, amount)
(function) # ↑

Increments the specified counter by the specified amount.

Parameters

  • key: The name of the counter to increment.
  • amount: The amount to increment by.

Examples

iex> Beaker.Counter.get("incr_by_counter")
nil
iex> Beaker.Counter.incr_by("incr_by_counter", 10)
:ok
iex> Beaker.Counter.get("incr_by_counter")
10

Returns :ok.

Source
set(key, value)
(function) # ↑

Sets the value of the specified counter to the specified value.

Parameters

  • key: The name of the counter to set the value for.
  • value: The value to set to the counter.

Examples

iex> Beaker.Counter.set("set_counter", 10)
:ok
iex> Beaker.Counter.get("set_counter")
10

Returns :ok.

Source