| -- |
| -- 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. |
| -- |
| |
| local Tracing = {} |
| |
| -- Tracing timer does the service and instance register |
| -- After register successfully, it sends traces and heart beat |
| function Tracing:startTimer(metadata_buffer) |
| -- The codes of timer setup is following the OpenResty timer doc |
| local delay = 3 -- in seconds |
| local new_timer = ngx.timer.at |
| local check |
| |
| local log = ngx.log |
| local DEBUG = ngx.DEBUG |
| |
| check = function(premature) |
| if not premature then |
| if metadata_buffer['serviceId'] == nil then |
| self:registerService(metadata_buffer) |
| end |
| |
| -- do the health check |
| local ok, err = new_timer(delay, check) |
| if not ok then |
| log(ERR, "failed to create timer: ", err) |
| return |
| end |
| end |
| end |
| |
| if 0 == ngx.worker.id() then |
| local ok, err = new_timer(delay, check) |
| if not ok then |
| log(ERR, "failed to create timer: ", err) |
| return |
| end |
| end |
| end |
| |
| function Tracing:registerService(metadata_buffer) |
| local log = ngx.log |
| local DEBUG = ngx.DEBUG |
| |
| local serviceName = metadata_buffer['serviceName'] |
| local cjson = require('cjson') |
| local serviceRegister = require("register").newServiceRegister(serviceName) |
| local serviceRegisterParam = cjson.encode(serviceRegister) |
| |
| local http = require('resty.http') |
| local httpc = http.new() |
| local res, err = httpc:request_uri('http://127.0.0.1:8080/skywalking/register/service', { |
| method = "POST", |
| body = serviceRegisterParam, |
| headers = { |
| ["Content-Type"] = "application/json", |
| }, |
| }) |
| |
| if #res.body > 0 then |
| local registerResults = cjson.decode(res.body) |
| |
| for i, result in ipairs(registerResults) |
| do |
| if result.key == serviceName then |
| local serviceId = result.value |
| log(DEBUG, "Service registered, service id = " .. serviceId) |
| metadata_buffer['serviceId'] = serviceId |
| end |
| end |
| end |
| end |
| |
| return Tracing |