Class: RailsMultisite::ConnectionManagement
- Inherits:
-
Object
- Object
- RailsMultisite::ConnectionManagement
show all
- Defined in:
- lib/rails_multisite/connection_management.rb,
lib/rails_multisite/connection_management/rails_60_compat.rb,
lib/rails_multisite/connection_management/rails_61_compat.rb
Defined Under Namespace
Classes: ConnectionSpecification
Constant Summary
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- DEFAULT =
'default'
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 160
def initialize(config_filename)
@config_filename = config_filename
@connection_handlers = begin
if ActiveRecord::Base.respond_to?(:connection_handlers)
ActiveRecord::Base.connection_handlers
else
{}
end
end
@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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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 157
def config_filename
@config_filename
end
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#connection_handlers ⇒ Object
Returns the value of attribute connection_handlers.
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# File 'lib/rails_multisite/connection_management.rb', line 157
def connection_handlers
@connection_handlers
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 157
def db_spec_cache
@db_spec_cache
end
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#default_connection_handler=(value) ⇒ Object
Sets the attribute default_connection_handler
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# File 'lib/rails_multisite/connection_management.rb', line 158
def default_connection_handler=(value)
@default_connection_handler = value
end
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Class Method Details
.all_dbs ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 94
def self.all_dbs
if @instance
@instance.all_dbs
else
[DEFAULT]
end
end
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.asset_hostnames ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 42
def self.asset_hostnames
@asset_hostnames
end
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.asset_hostnames=(h) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 46
def self.asset_hostnames=(h)
@asset_hostnames = h
end
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.clear_settings! ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 17
def self.clear_settings!
@instance&.db_spec_cache&.each do |key, spec|
@instance.connection_handlers.delete(self.handler_key(spec))
end
@instance = nil
end
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.config_filename ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 50
def self.config_filename
@instance.config_filename
end
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.config_filename=(config_filename) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 34
def self.config_filename=(config_filename)
if config_filename.nil?
@instance = nil
else
@instance = new(config_filename)
end
end
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.connection_spec(opts) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 119
def self.connection_spec(opts)
if @instance
@instance.connection_spec(opts)
else
ConnectionSpecification.current
end
end
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.current_db ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 102
def self.current_db
if @instance
instance.current_db
else
DEFAULT
end
end
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.current_db_hostnames ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 114
def self.current_db_hostnames
config = (@instance&.connection_spec(db: current_db) || ConnectionSpecification.current).config
config[:host_names].nil? ? [config[:host]] : config[:host_names]
end
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.current_hostname ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 110
def self.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 13
def self.default_config_filename
File.absolute_path(Rails.root.to_s + "/config/multisite.yml")
end
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.default_connection_handler=(connection_handler) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 147
def self.default_connection_handler=(connection_handler)
if @instance
unless connection_handler.is_a?(ActiveRecord::ConnectionAdapters::ConnectionHandler)
raise ArgumentError.new("Invalid connection handler")
end
@instance.default_connection_handler = connection_handler
end
end
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.each_connection(opts = nil, &blk) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 86
def self.each_connection(opts = nil, &blk)
if @instance
@instance.each_connection(opts, &blk)
else
with_connection(&blk)
end
end
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.establish_connection(opts) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 63
def self.establish_connection(opts)
@instance.establish_connection(opts) if @instance
end
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.handler_key(spec) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 135
def self.handler_key(spec)
@handler_key_suffix ||= begin
if ActiveRecord::Base.respond_to?(:writing_role)
"_#{ActiveRecord::Base.writing_role}"
else
""
end
end
:"#{spec.name}#{@handler_key_suffix}"
end
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.has_db?(db) ⇒ Boolean
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# File 'lib/rails_multisite/connection_management.rb', line 58
def self.has_db?(db)
return true if db == DEFAULT
!!(@instance && @instance.has_db?(db))
end
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.host(env) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 127
def self.host(env)
if @instance
@instance.host(env)
else
env["HTTP_HOST"]
end
end
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.instance ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 30
def self.instance
@instance
end
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.load_settings! ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 25
def self.load_settings!
STDERR.puts "RailsMultisite::ConnectionManagement.load_settings! is deprecated"
end
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.reload ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 54
def self.reload
@instance.reload
end
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.with_connection(db = DEFAULT, &blk) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 75
def self.with_connection(db = DEFAULT, &blk)
if @instance
@instance.with_connection(db, &blk)
else
connected = ActiveRecord::Base.connection_pool.connected?
result = blk.call db
ActiveRecord::Base.clear_active_connections! unless connected
result
end
end
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.with_hostname(hostname, &blk) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 67
def self.with_hostname(hostname, &blk)
if @instance
@instance.with_hostname(hostname, &blk)
else
blk.call hostname
end
end
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Instance Method Details
#all_dbs ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 353
def all_dbs
[DEFAULT] + @db_spec_cache.keys.to_a
end
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#connection_spec(opts) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 383
def connection_spec(opts)
if opts[:host]
@host_spec_cache[opts[:host]]
else
@db_spec_cache[opts[:db]]
end
end
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#current_hostname ⇒ Object
#each_connection(opts = nil, &blk) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 296
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)
ActiveRecord::Base.connection_handler.clear_active_connections! unless connected
end
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#establish_connection(opts) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 235
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(handler, spec)
@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 230
def has_db?(db)
return true if 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 365
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 180
def load_config!
configs = YAML::load(File.open(@config_filename))
no_prepared_statements = @default_spec.config[:prepared_statements] == false
configs.each do |k, v|
raise ArgumentError.new("Please do not name any db default!") if k == DEFAULT
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 224
def reload
@reload_mutex.synchronize do
load_config!
end
end
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#with_connection(db = DEFAULT) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 279
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)
ActiveRecord::Base.connection_handler.clear_active_connections! unless connected
end
rval
end
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#with_hostname(hostname) ⇒ Object
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# File 'lib/rails_multisite/connection_management.rb', line 262
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)
ActiveRecord::Base.connection_handler.clear_active_connections! unless connected
end
rval
end
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