Class: GerritEventRouter::Router

Inherits:
Object
  • Object
show all
Defined in:
lib/ger/router.rb

Instance Method Summary collapse

Constructor Details

#initialize(name, appid, config) ⇒ Router

Returns a new instance of Router.



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# File 'lib/ger/router.rb', line 4

def initialize(name, appid, config)
  @name = name
  @appid = appid
  begin
    @gerrit = config.gerrits[name]
    raise "Gerrit name is not found: #{name}" unless @gerrit
    @broker = config.brokers[@gerrit.broker]
    raise "Broker name is not found: #{@gerrit.broker}" unless @broker

    GER.logger.info "Configured router: #{@gerrit.header}(#{@gerrit.name}) -> broker#{@broker.header}(#{@broker.name})"
    @configured = true
  rescue
    @configured = false
    raise
  end
end

Instance Method Details

#header(provider) ⇒ Object 



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# File 'lib/ger/router.rb', line 21

def header(provider)
    headers = {
      "gerrit-name" => provider["name"],
      "gerrit-host" => provider["host"],
      "gerrit-scheme" => provider["scheme"],
      "gerrit-port" => provider["port"],
      "gerrit-front-url" => provider["url"],
      "gerrit-version" => provider["version"]
    }
    return headers
end

#start ⇒ Object 



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# File 'lib/ger/router.rb', line 33

def start
  raise "Router still not be configured" unless @configured

  Signal.trap(:INT) do
    Thread.new do
      GER.logger.info "Receive signal: INT. terminating."
    end
    EM.stop
  end

  Signal.trap(:TERM) do
    Thread.new do
      GER.logger.info "Receive signal: TERM. terminating."
    end
    EM.stop
  end

  Signal.trap(:USR2) do
    Thread.new do
      GER.logger.debug "Receive signal: USR2"
    end
    if GER.logger.level == GER::LOG_NORMAL then
      GER.logger.level = GER::LOG_DEBUG
    else
      GER.logger.level = GER::LOG_NORMAL
    end
  end

  begin
    uri = URI.parse(@gerrit.uri)
    uri.port = @gerrit.default_port unless uri.port
    ssh_options = { :port => uri.port }
    ssh_options[:keys] = @gerrit.ssh_keys if @gerrit.ssh_keys

    provider = {
      "name" => @gerrit.name,
      "host" => uri.host,
      "port" => uri.port.to_s,
      "scheme" => "ssh",
      "url" => @gerrit.weburl
    }

    EM.run do
      EM::Ssh.start(uri.host, uri.user, ssh_options) do |connection|
        connection.errback do |err|
          GER.logger.error { "#{@gerrit.header} #{err} (#{err.class})" }
          EM.stop
        end

        connection.callback do |session|
          GER.logger.info("#{@gerrit.header} connection established.")

          GER::Broker.connect(@broker) do |broker|
            GER.logger.info("#{@broker.header} connection established.")
            GER.logger.debug("#{@broker.header} channel id = #{broker.channel.id}")

            session.exec(@gerrit.version) do |channel, stream, data|
              if data then
                version = data.strip.delete("gerrit version")
                provider["version"] = version
                GER.logger.info("version: #{version}")
              end
            end

            session.exec(@gerrit.command) do |channel, stream, data|
              channel.on_data do |ch, data|
                if @broker.mode == "raw" then
                  str = %Q(#{data.strip})
                else
                  json = JSON.parse(data.strip)
                  provider["event_id"] = Digest::SHA256.hexdigest(data.strip)
                  json["provider"] = provider
                  str = JSON.generate(json)
                end
                broker.send(str, :app_id => @appid, :routing_key => @gerrit.routing_key, :headers => header(provider))
              end
            end
          end
        end
      end
    end
  rescue => e
    GER.logger.error { "#{e} (#{e.class})" }
    GER.logger.debug { e.backtrace.join("\n") }
    EM.stop
  end
end