Difference between revisions of "OTExample Observer"
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| − | + | ===This is a reusable implementation of the omnipresent design pattern "Observer"=== | |
| − | Note, that a well designed program in Object Teams will usually not require an explicit Observer infrastructure. See the [[OTExample_Stopwatch | Stopwatch]] example for an example, how a plain callin-binding ( | + | Note, that a well designed program in Object Teams will usually not require an explicit Observer infrastructure. See the [[OTExample_Stopwatch | Stopwatch]] example for an example, how a plain callin-binding ({{otjld|4|}}) suffices. |
This demo should, however, give a quick understanding to some techniques of Object Teams for all who are familiar with the Observer pattern (''the OTDT ships with a simpler version of this pattern''). | This demo should, however, give a quick understanding to some techniques of Object Teams for all who are familiar with the Observer pattern (''the OTDT ships with a simpler version of this pattern''). | ||
| Line 24: | Line 24: | ||
:[[OTExample_Observer/ObservingClose|ObservingClose]]</td> | :[[OTExample_Observer/ObservingClose|ObservingClose]]</td> | ||
<td style="vertical-align:top;">'''Two applications of the Observer pattern'''<br> | <td style="vertical-align:top;">'''Two applications of the Observer pattern'''<br> | ||
| − | binding the above open spots using callin ( | + | binding the above open spots using callin ({{otjld|4|}}) and callout ({{otjld|3|}}) bindings.</td> |
</tr><tr> | </tr><tr> | ||
<td>flower_example/ | <td>flower_example/ | ||
Revision as of 07:50, 23 February 2010
This is a reusable implementation of the omnipresent design pattern "Observer"
Note, that a well designed program in Object Teams will usually not require an explicit Observer infrastructure. See the Stopwatch example for an example, how a plain callin-binding (OTJLD §4) suffices.
This demo should, however, give a quick understanding to some techniques of Object Teams for all who are familiar with the Observer pattern (the OTDT ships with a simpler version of this pattern).
| protocol/ | This implements the GoF pattern very straight forwardly.
Open spots are:
|
| flower_example/ | Implement some base entities |
| flower_example/ | Two applications of the Observer pattern binding the above open spots using callin (OTJLD §4) and callout (OTJLD §3) bindings. |
| flower_example/ | A simple main program |