Class: RailsMultisite::ConnectionManagement
- Inherits:
-
Object
- Object
- RailsMultisite::ConnectionManagement
show all
- Defined in:
- lib/rails_multisite/connection_management.rb,
lib/rails_multisite/connection_management/null_instance.rb,
lib/rails_multisite/connection_management/rails_60_compat.rb,
lib/rails_multisite/connection_management/rails_61_compat.rb
Defined Under Namespace
Classes: ConnectionSpecification, NullInstance
Constant Summary
collapse
- DEFAULT =
"default"
Class Attribute Summary collapse
Instance Attribute Summary collapse
Class Method Summary
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Instance Method Summary
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Constructor Details
Returns a new instance of ConnectionManagement.
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# File 'lib/rails_multisite/connection_management.rb', line 89
def initialize(config_filename)
@config_filename = config_filename
@db_spec_cache = {}
@default_spec = ConnectionSpecification.default
@default_connection_handler = ActiveRecord::Base.connection_handler
@reload_mutex = Mutex.new
load_config!
end
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Class Attribute Details
.asset_hostnames ⇒ Object
Returns the value of attribute asset_hostnames.
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# File 'lib/rails_multisite/connection_management.rb', line 19
def asset_hostnames
@asset_hostnames
end
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Instance Attribute Details
#config_filename ⇒ Object
Returns the value of attribute config_filename.
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# File 'lib/rails_multisite/connection_management.rb', line 16
def config_filename
@config_filename
end
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#db_spec_cache ⇒ Object
Returns the value of attribute db_spec_cache.
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# File 'lib/rails_multisite/connection_management.rb', line 16
def db_spec_cache
@db_spec_cache
end
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Class Method Details
.clear_settings! ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 39
def clear_settings!
instance.clear_settings!
@instance = nil
end
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.config_filename=(config_filename) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 53
def config_filename=(config_filename)
if config_filename.blank?
@instance = nil
else
@instance = new(config_filename)
end
end
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.current_db_hostnames ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 65
def current_db_hostnames
config =
(
connection_spec(db: current_db) || ConnectionSpecification.current
).config
config[:host_names] || [config[:host]]
end
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.current_hostname ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 61
def current_hostname
current_db_hostnames.first
end
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.default_config_filename ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 35
def default_config_filename
File.absolute_path(Rails.root.to_s + "/config/multisite.yml")
end
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.handler_key(spec) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 73
def handler_key(spec)
@handler_key_suffix ||=
begin
if ActiveRecord.respond_to?(:writing_role)
"_#{ActiveRecord.writing_role}"
elsif ActiveRecord::Base.respond_to?(:writing_role)
"_#{ActiveRecord::Base.writing_role}"
else
""
end
end
:"#{spec.name}#{@handler_key_suffix}"
end
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.instance ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 49
def instance
@instance || NullInstance.instance
end
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.load_settings! ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 44
def load_settings!
STDERR.puts "RailsMultisite::ConnectionManagement.load_settings! is deprecated"
end
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Instance Method Details
#all_dbs ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 280
def all_dbs
[DEFAULT] + db_spec_cache.keys.to_a
end
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#clear_settings! ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 314
def clear_settings!
db_spec_cache.each do |key, spec|
connection_handlers.delete(handler_key(spec))
end
end
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#connection_spec(opts) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 310
def connection_spec(opts)
opts[:host] ? @host_spec_cache[opts[:host]] : db_spec_cache[opts[:db]]
end
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#current_hostname ⇒ Object
#default_connection_handler=(connection_handler) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 320
def default_connection_handler=(connection_handler)
unless connection_handler.is_a?(
ActiveRecord::ConnectionAdapters::ConnectionHandler
)
raise ArgumentError.new("Invalid connection handler")
end
@default_connection_handler = connection_handler
end
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#each_connection(opts = nil, &blk) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 221
def each_connection(opts = nil, &blk)
old = current_db
connected = ActiveRecord::Base.connection_pool.connected?
queue = nil
threads = nil
if (opts && (threads = opts[:threads]))
queue = Queue.new
all_dbs.each { |db| queue << db }
end
errors = nil
if queue
threads
.times
.map do
Thread.new do
while true
begin
db = queue.deq(true)
rescue ThreadError
db = nil
end
break unless db
establish_connection(db: db)
begin
blk.call(db)
rescue => e
(errors ||= []) << e
end
ActiveRecord::Base.connection_handler.clear_active_connections!
end
end
end
.map(&:join)
else
all_dbs.each do |db|
establish_connection(db: db)
blk.call(db)
ActiveRecord::Base.connection_handler.clear_active_connections!
end
end
if errors && errors.length > 0
raise StandardError, "Failed to run queries #{errors.inspect}"
end
ensure
establish_connection(db: old)
unless connected
ActiveRecord::Base.connection_handler.clear_active_connections!
end
end
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#establish_connection(opts) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 156
def establish_connection(opts)
opts[:db] = opts[:db].to_s
if opts[:db] != DEFAULT
spec = connection_spec(opts)
if (!spec && opts[:raise_on_missing])
raise "ERROR: #{opts[:db]} not found!"
end
end
spec ||= @default_spec
handler = nil
if spec != @default_spec
handler = connection_handlers[handler_key(spec)]
unless handler
handler = ActiveRecord::ConnectionAdapters::ConnectionHandler.new
handler.establish_connection(spec.config)
connection_handlers[handler_key(spec)] = handler
end
else
handler = @default_connection_handler
end
ActiveRecord::Base.connection_handler = handler
end
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#has_db?(db) ⇒ Boolean
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# File 'lib/rails_multisite/connection_management.rb', line 152
def has_db?(db)
db == DEFAULT || !!db_spec_cache[db]
end
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#host(env) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 292
def host(env)
if host = env["RAILS_MULTISITE_HOST"]
return host
end
request = Rack::Request.new(env)
host =
if request["__ws"] && self.class.asset_hostnames&.include?(request.host)
request.cookies.clear
request["__ws"]
else
request.host
end
env["RAILS_MULTISITE_HOST"] = host
end
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#load_config! ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 101
def load_config!
configs = YAML.safe_load(File.open(config_filename))
no_prepared_statements =
@default_spec.config[:prepared_statements] == false
configs.each do |k, v|
if k == DEFAULT
raise ArgumentError.new("Please do not name any db default!")
end
v[:db_key] = k
v[:prepared_statements] = false if no_prepared_statements
end
new_db_spec_cache = ConnectionSpecification.db_spec_cache(configs)
new_db_spec_cache.each do |k, v|
if v&.to_hash == db_spec_cache[k]&.to_hash
new_db_spec_cache[k] = db_spec_cache[k]
end
end
new_host_spec_cache = {}
configs.each do |k, v|
next unless v["host_names"]
v["host_names"].each do |host|
new_host_spec_cache[host] = new_db_spec_cache[k]
end
end
@default_spec.config[:host_names].each do |host|
new_host_spec_cache[host] = @default_spec
end
removed_dbs = db_spec_cache.keys - new_db_spec_cache.keys
removed_specs = db_spec_cache.values_at(*removed_dbs)
@host_spec_cache = new_host_spec_cache
@db_spec_cache = new_db_spec_cache
removed_specs.each { |s| connection_handlers.delete(handler_key(s)) }
end
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#reload ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 148
def reload
@reload_mutex.synchronize { load_config! }
end
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#with_connection(db = DEFAULT) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 202
def with_connection(db = DEFAULT)
old = current_db
connected = ActiveRecord::Base.connection_pool.connected?
establish_connection(db: db) unless connected && db == old
rval = yield db
unless connected && db == old
ActiveRecord::Base.connection_handler.clear_active_connections!
establish_connection(db: old)
unless connected
ActiveRecord::Base.connection_handler.clear_active_connections!
end
end
rval
end
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#with_hostname(hostname) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 183
def with_hostname(hostname)
old = current_hostname
connected = ActiveRecord::Base.connection_pool.connected?
establish_connection(host: hostname) unless connected && hostname == old
rval = yield hostname
unless connected && hostname == old
ActiveRecord::Base.connection_handler.clear_active_connections!
establish_connection(host: old)
unless connected
ActiveRecord::Base.connection_handler.clear_active_connections!
end
end
rval
end
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