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-rw-r--r--lib/tapicero/couch_changes.rb89
1 files changed, 0 insertions, 89 deletions
diff --git a/lib/tapicero/couch_changes.rb b/lib/tapicero/couch_changes.rb
deleted file mode 100644
index fddebec..0000000
--- a/lib/tapicero/couch_changes.rb
+++ /dev/null
@@ -1,89 +0,0 @@
-require 'couchrest'
-require 'fileutils'
-
-module Tapicero
- class CouchChanges
-
- attr_accessor :db
-
- def initialize(db, seq_filename)
- @db = db
- @seq_filename = seq_filename
- read_seq(seq_filename)
- end
-
- def created(hash = {}, &block)
- if block_given?
- @created = block
- else
- @created && @created.call(hash)
- end
- end
-
- def deleted(hash = {}, &block)
- if block_given?
- @deleted = block
- else
- @deleted && @deleted.call(hash)
- end
- end
-
- def listen
- Tapicero.logger.info "listening..."
- Tapicero.logger.debug "Starting at sequence #{since}"
- result = db.changes :feed => :continuous, :since => since, :heartbeat => 1000 do |hash|
- callbacks(hash)
- store_seq(hash["seq"])
- end
- Tapicero.logger.info "couch stream ended unexpectedly."
- Tapicero.logger.debug result.inspect
- end
-
- protected
-
- def since
- @since ||= 0 # fetch_last_seq
- end
-
- def callbacks(hash)
- #changed callback
- # let's not track design document changes
- return if hash['id'].start_with? '_design/'
- return unless changes = hash["changes"]
- return deleted(hash) if hash["deleted"]
- created(hash) if changes[0]["rev"].start_with?('1-')
- #updated callback
- end
-
- def read_seq(seq_filename)
- Tapicero.logger.debug "Looking up sequence here: #{seq_filename}"
- FileUtils.touch(seq_filename)
- unless File.writable?(seq_filename)
- raise StandardError.new("Can't access sequence file")
- end
- @since = File.read(seq_filename)
- if @since == ''
- @since = nil
- Tapicero.logger.debug "Found no sequence in the file."
- else
- Tapicero.logger.debug "Found sequence: #{@since}"
- end
- rescue Errno::ENOENT => e
- Tapicero.logger.warn "No sequence file found. Starting from scratch"
- end
-
- def store_seq(seq)
- File.write(@seq_filename, seq.to_json)
- end
-
- #
- # UNUSED: this is useful for only following new sequences.
- #
- def fetch_last_seq
- hash = db.changes :limit => 1, :descending => true
- Tapicero.logger.info "starting at seq: " + hash["last_seq"]
- return hash["last_seq"]
- end
-
- end
-end