dido:public:ra:xapend:xapend.a_glossary:t:topic
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
dido:public:ra:xapend:xapend.a_glossary:t:topic [2020/11/13 16:41] nick |
dido:public:ra:xapend:xapend.a_glossary:t:topic [2021/10/04 05:47] (current) 130.61.140.2 ↷ Links adapted because of a move operation |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ====== Topic ====== | + | ===== Topic ===== |
| - | [[dido:public:ra:xapend:xapend.a_glossary | Return to Glossary ]] | + | [[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]] |
| A **Topic** is the most basic description of data that is to be published | A **Topic** is the most basic description of data that is to be published | ||
| - | and/or subscribed to. A topic connects a [[dido:public:ra:xapend:xapend.a_glossary:d:data_writer]] with | + | and/or subscribed to. A topic connects a [[dido:public:ra:xapend:xapend.a_glossary:d:data_writer]] with a [[dido:public:ra:xapend:xapend.a_glossary:d:data_reader]], i.e., communication does not occur unless the |
| - | a [[dido:public:ra:xapend:xapend.a_glossary:d:data_reader]], i.e., communication does not occur unless the | + | topic published by a data writer matches a topic subscribed to by a data reader. Communication via topics is anonymous and transparent, i.e., publishers and subscribers need not be concerned with how topics are created or who is writing/reading them since the [[dido:public:ra:xapend:xapend.a_glossary:d:dds]] [[dido:public:ra:xapend:xapend.a_glossary:d:dcps |DCPS]] [[dido:public:ra:xapend:xapend.a_glossary:m:midware|middleware]] manages |
| - | topic published by a data writer matches a topic subscribed | + | these issues. In programming terms, a Topic is a [[dido:public:ra:xapend:xapend.a_glossary:c:class|Class]] and each [[dido:public:ra:xapend:xapend.a_glossary:i:instance|instance]] is a [[dido:public:ra:xapend:xapend.a_glossary:s:sample|Sample]]. Topic instances are associated with a [[dido:public:ra:xapend:xapend.a_glossary:k:key|key]] (similar to a packet [[dido:public:ra:xapend:xapend.a_glossary:i:id |ID]]), defined by [[dido:public:ra:xapend:xapend.b_stds:tech:omg:idl|IDL]] and a set of [[dido:public:ra:xapend:xapend.f_qos:start|Quality of Service parameters]]. |
| - | to by a data reader. Communication via topics is anonymous | + | |
| - | and transparent, i.e., publishers and subscribers need not | + | |
| - | be concerned with how topics are created or who is | + | |
| - | writing/reading them since the [[dido:public:ra:xapend:xapend.a_glossary:d:dds]] [[dido:public:ra:xapend:xapend.a_glossary:d:dcps |DCPS]] [[dido:public:ra:xapend:xapend.a_glossary:m:midware|middleware]] manages | + | |
| - | these issues. In programming terms, a Topic is a Class | + | |
| - | and each [[dido:public:ra:xapend:xapend.a_glossary:i:instance|instance]] is a [[dido:public:ra:xapend:xapend.a_glossary:s:sample|Sample]]. Topic instances are associated | + | |
| - | with a [[dido:public:ra:xapend:xapend.a_glossary:k:key|key]] (similar to a packet [[dido:public:ra:xapend:xapend.a_glossary:i:id |ID]]), defined by [[dido:public:ra:xapend:xapend.a_glossary:i:idl]] and a | + | |
| - | set of Quality of Service parameters. | + | |
| Source: [[https://istkb.adlinktech.com/article/vortex-opensplice-dds-glossary/ | OpenSplice Glossary]] | Source: [[https://istkb.adlinktech.com/article/vortex-opensplice-dds-glossary/ | OpenSplice Glossary]] | ||
dido/public/ra/xapend/xapend.a_glossary/t/topic.1605303693.txt.gz · Last modified: 2020/11/13 16:41 by nick
