High Level Database Access: Difference between revisions
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imported>Hendrik Brummermann No edit summary |
imported>Hendrik Brummermann No edit summary |
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{{Navigation for Marauroa Top| |
{{Navigation for Marauroa Top|Using}} |
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{{Navigation for Marauroa Users}} |
{{Navigation for Marauroa Users}} |
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== Data Access Objects == |
== Data Access Objects == |
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In compliance to the Marauroa architecture, database access related code is not spread all over the code base but concentrated in a set of data access objects (DAO). There is JavaDoc available for the complete [http:// |
In compliance to the Marauroa architecture, database access related code is not spread all over the code base but concentrated in a set of data access objects (DAO). There is JavaDoc available for the complete [http://stendhalgame.org/hudson/job/marauroa_HEAD/javadoc/marauroa/server/game/db/package-summary.html DAO package]. Note that games can add their own DAOs. |
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So lets assume you want to log a gameEvent about a player logging out: |
So lets assume you want to log a gameEvent about a player logging out: |
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DBTransaction transaction = TransactionPool.get().beginWork(); |
DBTransaction transaction = TransactionPool.get().beginWork(); |
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try { |
try { |
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DAORegister.get().get(GameEventDAO.class).addGameEvent(playerName, "saved"); |
DAORegister.get().get(GameEventDAO.class).addGameEvent(transaction, playerName, "saved"); |
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DAORegister.get().get(GameEventDAO.class).addGameEvent(playerName, "logout"); |
DAORegister.get().get(GameEventDAO.class).addGameEvent(transaction, playerName, "logout"); |
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} finally { |
} finally { |
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TransactionPool.get().commit(transaction); |
TransactionPool.get().commit(transaction); |
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Please note that commit() will automatically perform a rollback and throw an SQLException if there have been any errors. |
Please note that commit() will automatically perform a rollback and throw an SQLException if there have been any errors. |
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