mirror of
https://github.com/fnproject/fn.git
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9eaf824398
* add jaeger support, link hot container & req span * adds jaeger support now with FN_JAEGER_URL, there's a simple tutorial in the operating/metrics.md file now and it's pretty easy to get up and running. * links a hot request span to a hot container span. when we change this to sample at a lower ratio we'll need to finagle the hot container span to always sample or something, otherwise we'll hide that info. at least, since we're sampling at 100% for now if this is flipped on, can see freeze/unfreeze etc. if they hit. this is useful for debugging. note that zipkin's exporter does not follow the link at all, hence jaeger... and they're backed by the Cloud Empire now (CNCF) so we'll probably use it anyway. * vendor: add thrift for jaeger
119 lines
2.9 KiB
Lua
119 lines
2.9 KiB
Lua
--
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-- Licensed to the Apache Software Foundation (ASF) under one
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-- or more contributor license agreements. See the NOTICE file
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-- distributed with this work for additional information
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-- regarding copyright ownership. The ASF licenses this file
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-- to you under the Apache License, Version 2.0 (the
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-- "License"); you may not use this file except in compliance
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-- with the License. You may obtain a copy of the License at
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--
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-- http://www.apache.org/licenses/LICENSE-2.0
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--
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-- Unless required by applicable law or agreed to in writing,
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-- software distributed under the License is distributed on an
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-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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-- KIND, either express or implied. See the License for the
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-- specific language governing permissions and limitations
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-- under the License.
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--
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require 'TTransport'
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require 'libluabpack'
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TFramedTransport = TTransportBase:new{
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__type = 'TFramedTransport',
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doRead = true,
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doWrite = true,
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wBuf = '',
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rBuf = ''
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}
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function TFramedTransport:new(obj)
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if ttype(obj) ~= 'table' then
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error(ttype(self) .. 'must be initialized with a table')
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end
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-- Ensure a transport is provided
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if not obj.trans then
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error('You must provide ' .. ttype(self) .. ' with a trans')
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end
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return TTransportBase.new(self, obj)
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end
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function TFramedTransport:isOpen()
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return self.trans:isOpen()
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end
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function TFramedTransport:open()
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return self.trans:open()
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end
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function TFramedTransport:close()
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return self.trans:close()
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end
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function TFramedTransport:read(len)
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if string.len(self.rBuf) == 0 then
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self:__readFrame()
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end
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if self.doRead == false then
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return self.trans:read(len)
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end
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if len > string.len(self.rBuf) then
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local val = self.rBuf
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self.rBuf = ''
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return val
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end
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local val = string.sub(self.rBuf, 0, len)
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self.rBuf = string.sub(self.rBuf, len+1)
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return val
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end
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function TFramedTransport:__readFrame()
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local buf = self.trans:readAll(4)
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local frame_len = libluabpack.bunpack('i', buf)
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self.rBuf = self.trans:readAll(frame_len)
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end
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function TFramedTransport:write(buf, len)
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if self.doWrite == false then
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return self.trans:write(buf, len)
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end
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if len and len < string.len(buf) then
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buf = string.sub(buf, 0, len)
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end
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self.wBuf = self.wBuf .. buf
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end
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function TFramedTransport:flush()
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if self.doWrite == false then
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return self.trans:flush()
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end
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-- If the write fails we still want wBuf to be clear
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local tmp = self.wBuf
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self.wBuf = ''
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local frame_len_buf = libluabpack.bpack("i", string.len(tmp))
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self.trans:write(frame_len_buf)
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self.trans:write(tmp)
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self.trans:flush()
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end
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TFramedTransportFactory = TTransportFactoryBase:new{
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__type = 'TFramedTransportFactory'
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}
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function TFramedTransportFactory:getTransport(trans)
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if not trans then
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terror(TProtocolException:new{
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message = 'Must supply a transport to ' .. ttype(self)
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})
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end
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return TFramedTransport:new{trans = trans}
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end
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