Ambient-Oriented Programming

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at:byexample [2008/08/11 20:28] – added tvcutsemat:byexample [2009/10/08 14:11] (current) – tvcutsem
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 import /.at.lang.futures; import /.at.lang.futures;
  
-when: lightbulb<-toggleLight()@Due(seconds(10)) becomes: { |lightStatus| +when: lightbulb<-toggleLight()@Due(seconds(10)) becomes: { |reply| 
-  // code to execute when the light bulb switched on +  // code to execute when the message has been 
-  // lightStatus refers to the return value of the+  // succesfully processed. 
 +  // reply refers to the return value of the
   // toggleLight method.   // toggleLight method.
 } catch: TimeoutException using: { |e| } catch: TimeoutException using: { |e|
Line 39: Line 40:
 <code javascript> <code javascript>
 def sub := when: Type discovered: { |obj| def sub := when: Type discovered: { |obj|
-  ...+  // code to execute upon discovery
 } }
 </code> </code>
  
-Here, ''obj'' is either a far reference to the object (i.e. a remote object reference) if ''obj'' is pass-by-reference, or a copy of the object, if ''obj'' is pass-by-copy. To stop looking for a ''Type'' object in the ad hoc network, invoke ''sub.cancel()''.+Here, ''obj'' is either a far reference to the object (i.e. a remote object reference) if ''obj'' is pass-by-reference, or a copy of the object, if ''obj'' is pass-by-copy. ''sub'' refers to a subscription object. To stop looking for a ''Type'' object in the ad hoc network, invoke ''sub.cancel()''.
  
 The above block is triggered upon discovering one object of the appropriate (sub)type. If one wants to trigger a block every time an object of the appropriate type is discovered, execute: The above block is triggered upon discovering one object of the appropriate (sub)type. If one wants to trigger a block every time an object of the appropriate type is discovered, execute:
 <code javascript> <code javascript>
 whenever: Type discovered: { |obj| whenever: Type discovered: { |obj|
-  ...+  // code to execute upon every discovery
 } }
 </code> </code>
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 <code javascript> <code javascript>
 def sub := when: ref disconnected: { def sub := when: ref disconnected: {
-  ...+  // code to execute upon disconnection
 } }
 </code> </code>
Line 66: Line 67:
 <code javascript> <code javascript>
 def sub := when: ref reconnected: { def sub := when: ref reconnected: {
-  ...+  // code to execute upon reconnection
 } }
 </code> </code>
Line 88: Line 89:
 <code javascript> <code javascript>
 when: l expired: { when: l expired: {
-  ...+  // code to execute upon lease expiration
 } }
 </code> </code>
Line 100: Line 101:
  
 def sub := when: seconds(10) elapsed: { def sub := when: seconds(10) elapsed: {
-  ...+  // code to execute after 10 seconds
 } }
 </code> </code>
Line 108: Line 109:
 <code javascript> <code javascript>
 whenever: minutes(1) elapsed: { whenever: minutes(1) elapsed: {
-  ...+  // code to execute every minute
 } }
 </code> </code>
at/byexample.1218479306.txt.gz · Last modified: (external edit)