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Add "volatile API" for a custom DatabaseManager

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Reflection is fun! Catch-alls abound!

Also added method createCustomDatabaseManager(), intended for conversion - this lets the command specify the class name of the custom manager
This commit is contained in:
riking 2013-06-08 16:29:48 -07:00
parent 58e8fd4691
commit ab0541f1c1
1 changed files with 43 additions and 0 deletions
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43
src/main/java/com/gmail/nossr50/database/DatabaseManagerFactory.java
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@ -1,12 +1,51 @@
package com.gmail.nossr50.database;
import com.gmail.nossr50.mcMMO;
import com.gmail.nossr50.config.Config;
public class DatabaseManagerFactory {
private static Class<? extends DatabaseManager> customManager = null;
public static DatabaseManager getDatabaseManager() {
if (customManager != null) {
try {
return createCustomDatabaseManager(customManager);
} catch (Exception e) {
mcMMO.p.debug("Could not create custom database manager");
e.printStackTrace();
} catch (Throwable e) {
mcMMO.p.debug("Failed to create custom database manager");
e.printStackTrace();
}
mcMMO.p.debug("Falling back on " + (Config.getInstance().getUseMySQL() ? "SQL" : "Flatfile") + " database");
}
return Config.getInstance().getUseMySQL() ? new SQLDatabaseManager() : new FlatfileDatabaseManager();
}
/**
* Sets the custom DatabaseManager class for McMMO to use. This should be
* called prior to mcMMO enabling.
* <p>
* The provided class must have an empty constructor, which is the one
* that will be used.
* <p>
* This method is intended for API use, but it should not be considered
* stable. This method is subject to change and/or removal in future
* versions.
*
* @param man the DatabaseManager class to use
* @throws IllegalArgumentException if the provided class does not have
* an empty constructor
*/
public static void setCustomDatabaseManagerClass(Class<? extends DatabaseManager> clazz) {
try {
clazz.getConstructor((Class<?>) null);
} catch (Throwable e) {
throw new IllegalArgumentException("Provided database manager class must have an empty constructor", e);
}
customManager = clazz;
}
// For data conversion purposes
public static FlatfileDatabaseManager createFlatfileDatabaseManager() {
@ -16,4 +55,8 @@ public class DatabaseManagerFactory {
public static SQLDatabaseManager createSQLDatabaseManager() {
return new SQLDatabaseManager();
}
public static DatabaseManager createCustomDatabaseManager(Class<? extends DatabaseManager> clazz) throws Throwable {
return customManager.getConstructor((Class<?>) null).newInstance((Object[]) null);
}
}