Module: DB
- Includes:
- PactBroker::Logging
- Defined in:
- lib/db.rb
Class Method Summary collapse
- .configuration_for_env(env) ⇒ Object
-
.connect(db_credentials) ⇒ Object
Sequel by default does not test connections in its connection pool before handing them to a client.
- .connection_for_env(env) ⇒ Object
- .health_check ⇒ Object
- .mysql? ⇒ Boolean
Methods included from PactBroker::Logging
Class Method Details
.configuration_for_env(env) ⇒ Object
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# File 'lib/db.rb', line 43 def self.configuration_for_env env database_yml = PactBroker.project_root.join('config','database.yml') config = YAML.load(ERB.new(File.read(database_yml)).result) config.fetch(env).fetch(ENV.fetch('DATABASE_ADAPTER','default')) end |
.connect(db_credentials) ⇒ Object
Sequel by default does not test connections in its connection pool before handing them to a client. To enable connection testing you need to load the “connection_validator” extension like below. The connection validator extension is configurable, by default it only checks connections once per hour:
sequel.rubyforge.org/rdoc-plugins/files/lib/sequel/extensions/connection_validator_rb.html
Because most of our applications so far are accessed infrequently, there is very little overhead in checking each connection when it is requested. This takes care of stale connections.
A gotcha here is that it is not enough to enable the “connection_validator” extension, we also need to specify that we want to use the threaded connection pool, as noted in the documentation for the extension.
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# File 'lib/db.rb', line 27 def self.connect db_credentials Sequel.datetime_class = DateTime con = Sequel.connect(db_credentials.merge(:logger => logger, :pool_class => Sequel::ThreadedConnectionPool, :encoding => 'utf8')) con.extension(:connection_validator) con.pool.connection_validation_timeout = -1 #Check the connection on every request con.timezone = :utc con.run("SET sql_mode='STRICT_TRANS_TABLES';") if db_credentials[:adapter].to_s =~ /mysql/ con end |
.connection_for_env(env) ⇒ Object
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# File 'lib/db.rb', line 37 def self.connection_for_env env config = configuration_for_env(env) logger.info "Connecting to #{env} #{config['adapter']} database #{config['database']}." connect config end |
.health_check ⇒ Object
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# File 'lib/db.rb', line 55 def self.health_check PACT_BROKER_DB.synchronize do |c| c PACT_BROKER_DB.valid_connection? c end end |
.mysql? ⇒ Boolean
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# File 'lib/db.rb', line 49 def self.mysql? PACT_BROKER_DB.adapter_scheme.to_s =~ /mysql/ end |