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urtware / doc / activitydiagrams / subscriber / urtSubscriberCalculateUsefulness.uml @ c22d21ad

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/'
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µRtWare is a lightweight publish/subscribe middleware for real-time
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applications. It was developed as part of the software habitat for the
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Autonomous Mini Robot [1] (AMiRo) but can be used for other purposes as well.
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Copyright (C) 2018..2020  Thomas Schöpping et al.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program.  If not, see <http://www.gnu.org/licenses/>.
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'/
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/'### INTRO ##################################################################'/
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@startuml
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title **µRtWare**\nurtSubscriberCalculateUsefulness()\n
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!include ../../functions.iuml
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/'### PARAMETERS & START #####################################################'/
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start
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note
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  -- ""**subscriber** : urt_subscriber_t*"" --
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  The subscriber to be unsubscribed.
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  Must not be ""NULL"".
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  -- ""**latency** : urt_delay_t"" --
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  Delay (of a mesage) to calculate the usefulness for.
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end note
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/'### PROCEDURE ##############################################################'/
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if (RT class) then (HRT)
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  :return ""1"";
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  note: Otherwise some QoS timer would have triggered.
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elseif (RT class) then (FRT)
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  if (Timing ok?) then (yes)
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  note: ToDo: When is timing ok?
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    :return ""1.0"";
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  else (no)
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    :return ""0.0"";
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  endif
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elseif (RT class) then (SRT)
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  :execute callback;
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  :return result;
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else (NRT)
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  :return ""1"";
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endif
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/'### STOP & RETURN ##########################################################'/
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stop
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note
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  -- **return** ""float"" --
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  Returns the usefulness as a value within ""[0,1]"".
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end note
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/'### OUTRO ##################################################################'/
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@enduml