Refactoring Database Access in Marauroa: Difference between revisions

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imported>Hendrik Brummermann
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imported>Kymara
 
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Imagine you want to subclass the CharacterDAO with your class SomeGameCharacterDAO:
Imagine you want to subclass the CharacterDAO with your class SomeGameCharacterDAO:
<source lang="java">
public class SomeGameCharacterDAO extends CharacterDAO {
public class SomeGameCharacterDAO extends CharacterDAO {
...
...
</source>

You simply register it as
You simply register it as
<source lang="java">
DAORegistry.get().register(CharacterDAO.class, new SomeGameCharacterDAO());
DAORegistry.get().register(CharacterDAO.class, new SomeGameCharacterDAO());
</source>
Note: In the register call the first parameter is the parent class you want to replace.
Note: In the register call the first parameter is the parent class you want to replace.


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=== What are those database adapters for? ===
=== What are those database adapters for? ===


They are a thin layer of database abstraction. This allows us to not only support MySQL but also database systems with don't require an external server.
They are a thin layer of database abstraction. This allows us to not only support MySQL but also database systems which don't require an external server.



=== Why is there a method getLastInsertId? ===
=== Why is there a method getLastInsertId? ===
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The following diff shows the complete list of changes that were required to port JMaPacman. I think it may help you to get a feeling on how to adjust your own code.
The following diff shows the complete list of changes that were required to port JMaPacman. I think it may help you to get a feeling on how to adjust your own code.
<!--

Don't use syntax highlighting here because it does not work well with the diff characters and bold formation
<source lang="java">
-->
public class MaPacmanRPRuleProcessor implements IRPRuleProcessor
public class MaPacmanRPRuleProcessor implements IRPRuleProcessor
{
{
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}
}
}
}


[[Category:Marauroa]]
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