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--
-- Licensed to the Apache Software Foundation (ASF) under one or more
-- contributor license agreements. See the NOTICE file distributed with
-- this work for additional information regarding copyright ownership.
-- The ASF licenses this file to You under the Apache License, Version 2.0
-- (the "License"); you may not use this file except in compliance with
-- the License. You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Segment represents a finished tracing context
-- Including all information to send to the SkyWalking OAP server.
local Util = require('util')
local Segment = {
trace_id,
segment_id,
service_id,
service_inst_id,
spans,
}
-- Due to nesting relationship inside Segment/Span/TracingContext at the runtime,
-- SegmentProtocol is created to prepare JSON format serialization.
-- Following SkyWalking official trace protocol v2
-- https://github.com/apache/skywalking-data-collect-protocol/blob/master/language-agent-v2/trace.proto
local SegmentProtocol = {
globalTraceIds,
traceSegmentId,
serviceId,
serviceInstanceId,
spans,
}
function Segment:new()
local o = {}
setmetatable(o, self)
self.__index = self
return o
end
function SegmentProtocol:new()
local o = {}
setmetatable(o, self)
self.__index = self
o.globalTraceIds = {}
return o
end
-- Return SegmentProtocol
function Segment:transform()
local segmentBuilder = SegmentProtocol:new()
segmentBuilder.serviceId = self.service_id
segmentBuilder.globalTraceIds[1] = { idParts = self.trace_id}
segmentBuilder.traceSegmentId = { idParts = self.segment_id}
segmentBuilder.serviceId = self.service_id
segmentBuilder.serviceInstanceId = self.service_inst_id
segmentBuilder.spans = {}
if self.spans ~= nil and #self.spans > 0 then
for i, span in ipairs(self.spans)
do
segmentBuilder.spans[#segmentBuilder.spans + 1] = span:transform()
end
end
return segmentBuilder
end
return Segment