Class: Flydata::Output::TcpForwarder
- Inherits:
-
Object
- Object
- Flydata::Output::TcpForwarder
- Defined in:
- lib/flydata/output/forwarder.rb
Direct Known Subclasses
Constant Summary collapse
- FORWARD_HEADER =
[0x92].pack('C')
- BUFFER_SIZE =
32M
1024 * 1024 * 32
- DEFUALT_SEND_TIMEOUT =
1 minute
60
- RETRY_INTERVAL =
2
- RETRY_LIMIT =
10
Instance Attribute Summary collapse
-
#buffer_record_count ⇒ Object
readonly
Returns the value of attribute buffer_record_count.
-
#buffer_size ⇒ Object
readonly
Returns the value of attribute buffer_size.
Instance Method Summary collapse
- #close ⇒ Object
- #connect(server) ⇒ Object
- #emit(records, time = Time.now.to_i) ⇒ Object
- #flush ⇒ Object
-
#initialize(tag, servers, options = {}) ⇒ TcpForwarder
constructor
A new instance of TcpForwarder.
-
#pickup_server ⇒ Object
TODO: Check server status.
- #reset ⇒ Object
-
#send ⇒ Object
TODO retry logic.
- #set_options(options) ⇒ Object
Constructor Details
#initialize(tag, servers, options = {}) ⇒ TcpForwarder
Returns a new instance of TcpForwarder.
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# File 'lib/flydata/output/forwarder.rb', line 28 def initialize(tag, servers, = {}) @tag = tag unless servers and servers.kind_of?(Array) and not servers.empty? raise "Servers must not be empty." end @servers = servers @server_index = 0 () reset end |
Instance Attribute Details
#buffer_record_count ⇒ Object (readonly)
Returns the value of attribute buffer_record_count.
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# File 'lib/flydata/output/forwarder.rb', line 47 def buffer_record_count @buffer_record_count end |
#buffer_size ⇒ Object (readonly)
Returns the value of attribute buffer_size.
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# File 'lib/flydata/output/forwarder.rb', line 47 def buffer_size @buffer_size end |
Instance Method Details
#close ⇒ Object
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# File 'lib/flydata/output/forwarder.rb', line 141 def close flush end |
#connect(server) ⇒ Object
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# File 'lib/flydata/output/forwarder.rb', line 118 def connect(server) host, port = server.split(':') sock = TCPSocket.new(host, port.to_i) # Set options opt = [1, DEFUALT_SEND_TIMEOUT].pack('I!I!') sock.setsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER, opt) opt = [DEFUALT_SEND_TIMEOUT, 0].pack('L!L!') sock.setsockopt(Socket::SOL_SOCKET, Socket::SO_SNDTIMEO, opt) sock end |
#emit(records, time = Time.now.to_i) ⇒ Object
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# File 'lib/flydata/output/forwarder.rb', line 49 def emit(records, time = Time.now.to_i) records = [records] unless records.kind_of?(Array) records.each do |record| event_data = [time,record].to_msgpack @buffer_records << event_data @buffer_record_count += 1 @buffer_size += event_data.bytesize end if @buffer_size > @buffer_size_limit send else false end end |
#flush ⇒ Object
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# File 'lib/flydata/output/forwarder.rb', line 137 def flush send end |
#pickup_server ⇒ Object
TODO: Check server status
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# File 'lib/flydata/output/forwarder.rb', line 109 def pickup_server ret_server = @servers[@server_index] @server_index += 1 if @server_index >= (@servers.count) @server_index = 0 end ret_server end |
#reset ⇒ Object
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# File 'lib/flydata/output/forwarder.rb', line 131 def reset @buffer_records = '' @buffer_record_count = 0 @buffer_size = 0 end |
#send ⇒ Object
TODO retry logic
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# File 'lib/flydata/output/forwarder.rb', line 65 def send if @buffer_size > 0 else return false end if ENV['FLYDATA_BENCHMARK'] reset return true end sock = nil retry_count = 0 begin sock = connect(pickup_server) # Write header sock.write FORWARD_HEADER # Write tag sock.write @tag.to_msgpack # Write records sock.write [0xdb, @buffer_records.bytesize].pack('CN') StringIO.open(@buffer_records) do |i| FileUtils.copy_stream(i, sock) end rescue => e retry_count += 1 if retry_count > RETRY_LIMIT puts "! Error: Failed to send data. Exceeded the retry limit. retry_count:#{retry_count}" raise e end puts "! Warn: Retring to send data. retry_count:#{retry_count} error=#{e.to_s}" wait_time = RETRY_INTERVAL ** retry_count puts " Now waiting for next retry. time=#{wait_time}sec" sleep wait_time retry ensure if sock sock.close rescue nil end end reset true end |
#set_options(options) ⇒ Object
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# File 'lib/flydata/output/forwarder.rb', line 39 def () if [:buffer_size_limit] @buffer_size_limit = [:buffer_size_limit] else @buffer_size_limit = BUFFER_SIZE end end |