Revision c22d21ad doc/activitydiagrams/subscriber/urtSubscriberFetchLatestMessage.uml
| doc/activitydiagrams/subscriber/urtSubscriberFetchLatestMessage.uml | ||
|---|---|---|
| 48 | 48 |
|
| 49 | 49 |
:lock topic; |
| 50 | 50 |
if (Is HRT subscriber?) then (yes) |
| 51 |
:lock next message;
|
|
| 51 |
:access next message;
|
|
| 52 | 52 |
else (no) |
| 53 | 53 |
if (Has a message been read before?) then (yes) |
| 54 |
:lock last read message;
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|
| 54 |
:access last read message;
|
|
| 55 | 55 |
if (Message timestamp equals local copy?) then (yes) |
| 56 | 56 |
else (no) |
| 57 | 57 |
partition "find oldest valid message" {
|
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:lock next message; |
|
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note: Locked two messages ahead. |
|
| 58 |
:access next message; |
|
| 60 | 59 |
while (Timestamp of next is younger than of current?) is (yes) |
| 61 |
fork |
|
| 62 |
:unlock current message; |
|
| 63 |
fork again |
|
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:lock one message further ahead; |
|
| 65 |
endfork |
|
| 60 |
:iterate by one message; |
|
| 66 | 61 |
endwhile (no) |
| 67 |
:unlock next message; |
|
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note: One message still locked. |
|
| 69 | 62 |
} |
| 70 | 63 |
endif |
| 71 | 64 |
else (no) |
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:lock message after topic's latest message;
|
|
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:access message after topic's latest message;
|
|
| 73 | 66 |
endif |
| 74 | 67 |
endif |
| 75 | 68 |
partition "iterate to latest" {
|
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:lock one message further ahead; |
|
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note: Locked two messages ahead. |
|
| 78 | 69 |
while (Timestamp of next message is younger than of current?) is (yes) |
| 79 |
fork |
|
| 80 |
if (Is HRT subscriber?) then (yes) |
|
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fork |
|
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:decrement HRT counter of current message; |
|
| 83 |
fork again |
|
| 84 |
:update QoS delay timer (@subscriber); |
|
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endfork |
|
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else (no) |
|
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endif |
|
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:unlock current message; |
|
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fork again |
|
| 90 |
:lock one message further ahead; |
|
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endfork |
|
| 70 |
if (Is HRT subscriber?) then (yes) |
|
| 71 |
fork |
|
| 72 |
:decrement HRT counter of current message; |
|
| 73 |
fork again |
|
| 74 |
:update QoS delay timer (@subscriber); |
|
| 75 |
endfork |
|
| 76 |
else (no) |
|
| 77 |
endif |
|
| 78 |
:iterate by one message; |
|
| 92 | 79 |
endwhile (no) |
| 93 |
:unlock next message; |
|
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note: One message still locked. |
|
| 95 | 80 |
} |
| 96 | 81 |
fork |
| 97 | 82 |
:set last fetched message pointer to locked message; |
| ... | ... | |
| 120 | 105 |
else (no) |
| 121 | 106 |
endif |
| 122 | 107 |
endfork |
| 123 |
:unlock message; |
|
| 124 | 108 |
:unlock topic; |
| 125 | 109 |
|
| 126 | 110 |
/'### STOP & RETURN ##########################################################'/ |
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