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## The contents of this file are subject to the Mozilla Public License
## Version 1.1 (the "License"); you may not use this file except in
## compliance with the License. You may obtain a copy of the License
## at http://www.mozilla.org/MPL/
##
## Software distributed under the License is distributed on an "AS IS"
## basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
## the License for the specific language governing rights and
## limitations under the License.
##
## The Original Code is RabbitMQ.
##
## The Initial Developer of the Original Code is GoPivotal, Inc.
## Copyright (c) 2007-2017 Pivotal Software, Inc. All rights reserved.
defmodule RabbitMQ.CLI.Ctl.Commands.SetVmMemoryHighWatermarkCommand do
alias RabbitMQ.CLI.Core.Helpers
@behaviour RabbitMQ.CLI.CommandBehaviour
use RabbitMQ.CLI.DefaultOutput
def merge_defaults(args, opts), do: {args, opts}
def validate([], _) do
{:validation_failure, :not_enough_args}
end
def validate(["absolute"], _) do
{:validation_failure, :not_enough_args}
end
def validate(["absolute"|_] = args, _) when length(args) > 2 do
{:validation_failure, :too_many_args}
end
def validate(["absolute", arg], _) do
case Integer.parse(arg) do
:error -> {:validation_failure, :bad_argument}
{_, rest} ->
case Enum.member?(Helpers.memory_units, rest) do
true -> :ok
false -> case Float.parse(arg) do
{_, orest} when orest == rest ->
{:validation_failure, {:bad_argument, "Invalid units."}}
_ ->
{:validation_failure, {:bad_argument, "The threshold should be an integer."}}
end
end
end
end
def validate([_|_] = args, _) when length(args) > 1 do
{:validation_failure, :too_many_args}
end
def validate([arg], _) when is_number(arg) and (arg < 0.0 or arg > 1.0) do
{:validation_failure, {:bad_argument, "The threshold should be a fraction between 0.0 and 1.0"}}
end
def validate([arg], %{}) when is_binary(arg) do
case Float.parse(arg) do
{arg, ""} when is_number(arg) and (arg < 0.0 or arg > 1.0) ->
{:validation_failure, {:bad_argument, "The threshold should be a fraction between 0.0 and 1.0"}}
{_, ""} -> :ok
_ -> {:validation_failure, :bad_argument}
end
end
def validate(_, _), do: :ok
use RabbitMQ.CLI.Core.RequiresRabbitAppRunning
def run(["absolute", arg], opts) do
case Integer.parse(arg) do
{num, rest} -> valid_units = rest in Helpers.memory_units
set_vm_memory_high_watermark_absolute({num, rest}, valid_units, opts)
end
end
def run([arg], %{node: node_name}) when is_number(arg) and arg >= 0.0 do
:rabbit_misc.rpc_call(node_name,
:vm_memory_monitor,
:set_vm_memory_high_watermark,
[arg]
)
end
def run([arg], %{} = opts) when is_binary(arg) do
case Float.parse(arg) do
{num, ""} -> run([num], opts)
end
end
defp set_vm_memory_high_watermark_absolute({num, rest}, true, %{node: node_name}) when num > 0 do
val = Helpers.memory_unit_absolute(num, rest)
:rabbit_misc.rpc_call(node_name,
:vm_memory_monitor,
:set_vm_memory_high_watermark,
[{:absolute, val}])
end
def usage, do: ["set_vm_memory_high_watermark <fraction>", "set_vm_memory_high_watermark absolute <value>"]
def banner(["absolute", arg], %{node: node_name}), do: "Setting memory threshold on #{node_name} to #{arg} bytes ..."
def banner([arg], %{node: node_name}), do: "Setting memory threshold on #{node_name} to #{arg} ..."
end
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