Module: QC
- Defined in:
- lib/queue_classic/okjson.rb,
lib/queue_classic.rb,
lib/queue_classic/conn.rb,
lib/queue_classic/queue.rb,
lib/queue_classic/setup.rb,
lib/queue_classic/worker.rb,
lib/queue_classic/queries.rb
Overview
Some parts adapted from golang.org/src/pkg/json/decode.go and golang.org/src/pkg/utf8/utf8.go
Defined Under Namespace
Modules: Conn, OkJson, Queries, Setup Classes: Queue, Worker
Constant Summary collapse
- Root =
File.("..", File.dirname(__FILE__))
- SqlFunctions =
File.join(QC::Root, "/sql/ddl.sql")
- DropSqlFunctions =
File.join(QC::Root, "/sql/drop_ddl.sql")
- CreateTable =
File.join(QC::Root, "/sql/create_table.sql")
- TABLE_NAME =
Why do you want to change the table name? Just deal with the default OK? If you do want to change this, you will need to update the PL/pgSQL lock_head() function. Come on. Don’t do it.… Just stick with the default.
"queue_classic_jobs"
- QUEUE =
Each row in the table will have a column that notes the queue. You can point your workers at different queues but only one at a time.
ENV["QUEUE"] || "default"
- TOP_BOUND =
Set this to 1 for strict FIFO. There is nothing special about 9.…
(ENV["QC_TOP_BOUND"] || 9).to_i
- LISTENING_WORKER =
If you are using PostgreSQL > 9 then you will have access to listen/notify with payload. Set this value if you wish to make your worker more efficient.
!ENV["QC_LISTENING_WORKER"].nil?
- FORK_WORKER =
Set this variable if you wish for the worker to fork a UNIX process for each locked job. Remember to re-establish any database connections. See the worker for more details.
!ENV["QC_FORK_WORKER"].nil?
- MAX_LOCK_ATTEMPTS =
The worker uses an exponential back-off algorithm to lock a job. This value will be used as the max exponent.
(ENV["QC_MAX_LOCK_ATTEMPTS"] || 5).to_i
Class Method Summary collapse
- .default_queue ⇒ Object
- .log(data) ⇒ Object
- .log_yield(data) ⇒ Object
-
.method_missing(sym, *args, &block) ⇒ Object
Defer method calls on the QC module to the default queue.
-
.respond_to_missing?(method_name, include_private = false) ⇒ Boolean
Ensure QC.respond_to?(:enqueue) equals true (ruby 1.9 only).
Class Method Details
.default_queue ⇒ Object
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# File 'lib/queue_classic.rb', line 69 def self.default_queue @default_queue ||= begin Queue.new(QUEUE) end end |
.log(data) ⇒ Object
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# File 'lib/queue_classic.rb', line 88 def self.log(data) result = nil data = {:lib => "queue-classic"}.merge(data) if block_given? start = Time.now result = yield data.merge(:elapsed => Time.now - start) end data.reduce(out=String.new) do |s, tup| s << [tup.first, tup.last].join("=") << " " end puts(out) if ENV["DEBUG"] return result end |
.log_yield(data) ⇒ Object
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# File 'lib/queue_classic.rb', line 75 def self.log_yield(data) begin t0 = Time.now yield rescue => e log({:at => "error", :error => e.inspect}.merge(data)) raise ensure t = Integer((Time.now - t0)*1000) log(data.merge(:elapsed => t)) unless e end end |
.method_missing(sym, *args, &block) ⇒ Object
Defer method calls on the QC module to the default queue. This facilitates QC.enqueue()
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# File 'lib/queue_classic.rb', line 60 def self.method_missing(sym, *args, &block) default_queue.send(sym, *args, &block) end |
.respond_to_missing?(method_name, include_private = false) ⇒ Boolean
Ensure QC.respond_to?(:enqueue) equals true (ruby 1.9 only)
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# File 'lib/queue_classic.rb', line 65 def self.respond_to_missing?(method_name, include_private = false) default_queue.respond_to?(method_name) end |