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test_server.rb
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test_server.rb
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require 'tempfile'
require 'expect'
require 'open3'
require 'riak/util/tcp_socket_extensions'
module Riak
class TestServer
APP_CONFIG_DEFAULTS = {
:riak_core => {
:web_ip => "127.0.0.1",
:web_port => 9000,
:handoff_port => 9001,
:ring_creation_size => 64
},
:riak_kv => {
:storage_backend => :riak_kv_test_backend,
:pb_ip => "127.0.0.1",
:pb_port => 9002,
:js_vm_count => 8,
:js_max_vm_mem => 8,
:js_thread_stack => 16,
:riak_kv_stat => true,
# Turn off map caching
:map_cache_size => 0, # 0.14
:vnode_cache_entries => 0 # 0.13
},
:luwak => {
:enabled => false
}
}
VM_ARGS_DEFAULTS = {
"-name" => "riaktest#{rand(1000000).to_s}@127.0.0.1",
"-setcookie" => "#{rand(1000000).to_s}_#{rand(1000000).to_s}",
"+K" => true,
"+A" => 64,
"-smp" => "enable",
"-env ERL_MAX_PORTS" => 4096,
"-env ERL_FULLSWEEP_AFTER" => 10,
"-pa" => File.expand_path("../../../erl_src", __FILE__)
}
DEFAULTS = {
:app_config => APP_CONFIG_DEFAULTS,
:vm_args => VM_ARGS_DEFAULTS,
:temp_dir => File.join(Dir.tmpdir,'riaktest'),
}
attr_accessor :temp_dir, :app_config, :vm_args, :cin, :cout, :cerr, :cpid
def initialize(options={})
options = deep_merge(DEFAULTS.dup, options)
@temp_dir = File.expand_path(options[:temp_dir])
@bin_dir = File.expand_path(options[:bin_dir])
options[:app_config][:riak_core][:ring_state_dir] ||= File.join(@temp_dir, "data", "ring")
@app_config = options[:app_config]
@vm_args = options[:vm_args]
# For synchronizing start/stop/recycle
@mutex = Mutex.new
cleanup # Should prevent some errors related to unclean startup
end
# Sets up the proper scripts, configuration and directories for
# the test server. Call at the top of your test suite (not in a
# setup method).
def prepare!
unless @prepared
create_temp_directories
@riak_script = File.join(@temp_bin, 'riak')
write_riak_script
write_vm_args
write_app_config
@prepared = true
end
end
# Starts the test server if it is not already running, and waits
# for it to respond to pings.
def start
if @prepared && !@started
@mutex.synchronize do
@cin, @cout, @cerr, @cpid = Open3.popen3("#{@riak_script} console")
@cin.puts
@cin.flush
wait_for_erlang_prompt
@started = true
end
end
end
# Stops the test server if it is running.
def stop
if @started
@mutex.synchronize do
begin
@cin.puts "init:stop()."
@cin.flush
rescue Errno::EPIPE
ensure
register_stop
end
end
true
end
end
# Whether the server has been started.
def started?
@started
end
# Causes the entire contents of the Riak in-memory backends to be
# dumped by performing a soft restart.
def recycle
if @started
@mutex.synchronize do
begin
if @app_config[:riak_kv][:storage_backend] == :riak_kv_test_backend
@cin.puts "riak_kv_test_backend:reset()."
@cin.flush
wait_for_erlang_prompt
else
@cin.puts "init:restart()."
@cin.flush
wait_for_erlang_prompt
wait_for_startup
end
rescue Errno::EPIPE
warn "Broken pipe when recycling, is Riak alive?"
register_stop
return false
end
end
true
else
start
end
end
# Cleans up any files and directories generated by the test
# server.
def cleanup
stop if @started
FileUtils.rm_rf(@temp_dir)
@prepared = false
end
private
def create_temp_directories
%w{bin etc log data pipe}.each do |dir|
instance_variable_set("@temp_#{dir}", File.expand_path(File.join(@temp_dir, dir)))
FileUtils.mkdir_p(instance_variable_get("@temp_#{dir}"))
end
end
def write_riak_script
File.open(@riak_script, 'wb') do |f|
File.readlines(File.join(@bin_dir, 'riak')).each do |line|
line.sub!(/(RUNNER_SCRIPT_DIR=)(.*)/, '\1' + @temp_bin)
line.sub!(/(RUNNER_ETC_DIR=)(.*)/, '\1' + @temp_etc)
line.sub!(/(RUNNER_USER=)(.*)/, '\1')
line.sub!(/(RUNNER_LOG_DIR=)(.*)/, '\1' + @temp_log)
line.sub!(/(PIPE_DIR=)(.*)/, '\1' + @temp_pipe)
if line.strip == "RUNNER_BASE_DIR=${RUNNER_SCRIPT_DIR%/*}"
line = "RUNNER_BASE_DIR=#{File.expand_path("..",@bin_dir)}\n"
end
f.write line
end
end
FileUtils.chmod(0755,@riak_script)
end
def write_vm_args
File.open(File.join(@temp_etc, 'vm.args'), 'wb') do |f|
f.write @vm_args.map {|k,v| "#{k} #{v}" }.join("\n")
end
end
def write_app_config
File.open(File.join(@temp_etc, 'app.config'), 'wb') do |f|
f.write to_erlang_config(@app_config) + '.'
end
end
def deep_merge(source, target)
source.merge(target) do |key, old_val, new_val|
if Hash === old_val && Hash === new_val
deep_merge(old_val, new_val)
else
new_val
end
end
end
def to_erlang_config(hash, depth = 1)
padding = ' ' * depth
parent_padding = ' ' * (depth-1)
values = hash.map do |k,v|
printable = case v
when Hash
to_erlang_config(v, depth+1)
when String
"\"#{v}\""
else
v.to_s
end
"{#{k}, #{printable}}"
end.join(",\n#{padding}")
"[\n#{padding}#{values}\n#{parent_padding}]"
end
def wait_for_startup
TCPSocket.wait_for_service_with_timeout(:host => @app_config[:riak_core][:web_ip],
:port => @app_config[:riak_core][:web_port], :timeout => 10)
end
def wait_for_erlang_prompt
@cout.expect(/\(#{Regexp.escape(vm_args["-name"])}\)\d+>/)
end
def register_stop
%w{@cin @cout @cerr}.each {|io| if instance_variable_get(io); instance_variable_get(io).close; instance_variable_set(io, nil) end }
_cpid = @cpid; @cpid = nil
at_exit { _cpid.join if _cpid && _cpid.alive? }
@started = false
end
end
end