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Author:manus

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Date:2011-05-06T23:28:40.000000Z


git-svn-id: https://svn.eiffel.com/eiffel-org/trunk@888 abb3cda0-5349-4a8f-a601-0c33ac3a8c38
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manus
2011-05-06 23:28:40 +00:00
parent f8035c5507
commit f5fedd1ddd
2 changed files with 7 additions and 2 deletions
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6
documentation/current/solutions/concurrent-computing/concurrent-eiffel-scoop/scoop-examples/observer-pattern.wiki
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@@ -14,5 +14,11 @@ You should understand that the example doesn't really parse code. Rather, it jus
=Highlights=
The name of this example is Observer pattern, but it's not a classic example of the [http://en.wikipedia.org/wiki/Observer_pattern Observer design pattern] as commonly known. But it does have elements of the observer pattern that we will see.
The important classes here are <code>DEGREE_5</code>, <code>EIFFEL_PARSER_POOL</code>, and <code>EIFFEL_PARSER</code>. <code>DEGREE_5</code> represents Eiffel compilation degree five, parsing of classes. In the example, <code>DEGREE_5</code> uses an instance of <code>EIFFEL_PARSER_POOL</code> to manage a pool of instances of <code>EIFFEL_PARSER</code> which actually do the parsing. The <code>EIFFEL_PARSER</code>s are declared <code>separate</code> so that they can work concurrently, parsing different files (of course, remember that in this example the parsing is just simulated).
When <code>DEGREE_5</code> creates the <code>EIFFEL_PARSER_POOL</code>, it provides a maximum number of parsers to be held in the pool and a function agent which the pool can use to create a new parser instance. Then when <code>DEGREE_5</code> asks the pool to parse a file, it provides references to the file itself and two procedure agents: one for pre-parse processing and one for post-parse processing.

3
documentation/current/solutions/database-access/eiffelstore/eiffelstore-tutorial/eiffelstore-interface-layer/selection-access.wiki
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@@ -100,8 +100,7 @@ A DB_RESULT object merely carries data retrieved from the database. You have to
...
create tuple
tuple.copy (selection.cursor)
create tuple.make_from_cursor (selection.cursor)
if tuple.count >= 2 and then tuple.column_name (2).is_equal ("Firstname") then
io.putstring (tuple.item (2).out)
end