Remove hard-coded registration of known backend-modules from QBackendModuleDispatcher, in favor of all modules self-registering in static-init block

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/modules/backend/QBackendModuleDispatcher.java

@@ -27,21 +27,18 @@ import java.util.Map;
 import com.kingsrook.qqq.backend.core.exceptions.QModuleDispatchException;
 import com.kingsrook.qqq.backend.core.logging.QLogger;
 import com.kingsrook.qqq.backend.core.model.metadata.QBackendMetaData;
-import static com.kingsrook.qqq.backend.core.logging.LogUtils.logPair;
 
 
 /*******************************************************************************
  ** This class is responsible for loading a backend module, by its name, and 
  ** returning an instance.
  **
- ** TODO - make this mapping runtime-bound, not pre-compiled in.
- **
  *******************************************************************************/
 public class QBackendModuleDispatcher
 {
    private static final QLogger LOG = QLogger.getLogger(QBackendModuleDispatcher.class);
 
-   private static Map<String, String> backendTypeToModuleClassNameMap;
+   private static Map<String, String> backendTypeToModuleClassNameMap = new HashMap<>();
 
 
 
@@ -50,51 +47,6 @@ public class QBackendModuleDispatcher
     *******************************************************************************/
    public QBackendModuleDispatcher()
    {
-      initBackendTypeToModuleClassNameMap();
-   }
-
-
-
-   /*******************************************************************************
-    **
-    *******************************************************************************/
-   private static void initBackendTypeToModuleClassNameMap()
-   {
-      if(backendTypeToModuleClassNameMap != null)
-      {
-         return;
-      }
-
-      Map<String, String> newMap = new HashMap<>();
-
-      String[] moduleClassNames = new String[]
-         {
-            // todo - let modules somehow "export" their types here?
-            //  e.g., backend-core shouldn't need to "know" about the modules.
-            "com.kingsrook.qqq.backend.core.modules.backend.implementations.mock.MockBackendModule",
-            "com.kingsrook.qqq.backend.core.modules.backend.implementations.memory.MemoryBackendModule",
-            "com.kingsrook.qqq.backend.core.modules.backend.implementations.enumeration.EnumerationBackendModule",
-            "com.kingsrook.qqq.backend.module.rdbms.RDBMSBackendModule",
-            "com.kingsrook.qqq.backend.module.filesystem.local.FilesystemBackendModule",
-            "com.kingsrook.qqq.backend.module.filesystem.s3.S3BackendModule",
-            "com.kingsrook.qqq.backend.module.api.APIBackendModule"
-         };
-
-      for(String moduleClassName : moduleClassNames)
-      {
-         try
-         {
-            Class<?>                moduleClass = Class.forName(moduleClassName);
-            QBackendModuleInterface module      = (QBackendModuleInterface) moduleClass.getConstructor().newInstance();
-            newMap.put(module.getBackendType(), moduleClassName);
-         }
-         catch(Exception e)
-         {
-            LOG.debug("Backend module could not be loaded", e, logPair("moduleClassName", moduleClassName));
-         }
-      }
-
-      backendTypeToModuleClassNameMap = newMap;
    }
 
 
@@ -104,7 +56,6 @@ public class QBackendModuleDispatcher
     *******************************************************************************/
    public static void registerBackendModule(QBackendModuleInterface moduleInstance)
    {
-      initBackendTypeToModuleClassNameMap();
       String backendType = moduleInstance.getBackendType();
       if(backendTypeToModuleClassNameMap.containsKey(backendType))
       {

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/modules/backend/QBackendModuleInterface.java

@@ -39,7 +39,7 @@ import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableBackendDetails
 /*******************************************************************************
  ** Interface that a QBackendModule must implement.
  **
- ** Note, some methods all have a default version, which throws a 'not implemented'
+ ** Note, all methods have a default version, which throws a 'not implemented'
  ** exception.
  **
  *******************************************************************************/

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/modules/backend/implementations/enumeration/EnumerationBackendModule.java

@@ -25,6 +25,7 @@ package com.kingsrook.qqq.backend.core.modules.backend.implementations.enumerati
 import com.kingsrook.qqq.backend.core.actions.interfaces.CountInterface;
 import com.kingsrook.qqq.backend.core.actions.interfaces.QueryInterface;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableBackendDetails;
+import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleDispatcher;
 import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
 
 
@@ -37,6 +38,10 @@ import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
  *******************************************************************************/
 public class EnumerationBackendModule implements QBackendModuleInterface
 {
+   static
+   {
+      QBackendModuleDispatcher.registerBackendModule(new EnumerationBackendModule());
+   }
 
    /*******************************************************************************
     ** Method where a backend module must be able to provide its type (name).

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/modules/backend/implementations/memory/MemoryBackendModule.java

@@ -28,6 +28,7 @@ import com.kingsrook.qqq.backend.core.actions.interfaces.DeleteInterface;
 import com.kingsrook.qqq.backend.core.actions.interfaces.InsertInterface;
 import com.kingsrook.qqq.backend.core.actions.interfaces.QueryInterface;
 import com.kingsrook.qqq.backend.core.actions.interfaces.UpdateInterface;
+import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleDispatcher;
 import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
 
 
@@ -42,6 +43,12 @@ import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
  *******************************************************************************/
 public class MemoryBackendModule implements QBackendModuleInterface
 {
+   static
+   {
+      QBackendModuleDispatcher.registerBackendModule(new MemoryBackendModule());
+   }
+
+
    /*******************************************************************************
     ** Method where a backend module must be able to provide its type (name).
     *******************************************************************************/

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/modules/backend/implementations/mock/MockBackendModule.java

@@ -28,6 +28,7 @@ import com.kingsrook.qqq.backend.core.actions.interfaces.InsertInterface;
 import com.kingsrook.qqq.backend.core.actions.interfaces.QueryInterface;
 import com.kingsrook.qqq.backend.core.actions.interfaces.UpdateInterface;
 import com.kingsrook.qqq.backend.core.model.metadata.QBackendMetaData;
+import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleDispatcher;
 import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
 
 
@@ -40,6 +41,11 @@ import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
  *******************************************************************************/
 public class MockBackendModule implements QBackendModuleInterface
 {
+   static
+   {
+      QBackendModuleDispatcher.registerBackendModule(new MockBackendModule());
+   }
+
    /*******************************************************************************
     ** Method where a backend module must be able to provide its type (name).
     *******************************************************************************/

qqq-backend-module-api/src/main/java/com/kingsrook/qqq/backend/module/api/APIBackendModule.java

@@ -30,6 +30,7 @@ import com.kingsrook.qqq.backend.core.actions.interfaces.QueryInterface;
 import com.kingsrook.qqq.backend.core.actions.interfaces.UpdateInterface;
 import com.kingsrook.qqq.backend.core.model.metadata.QBackendMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableBackendDetails;
+import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleDispatcher;
 import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
 import com.kingsrook.qqq.backend.module.api.actions.APICountAction;
 import com.kingsrook.qqq.backend.module.api.actions.APIDeleteAction;
@@ -44,6 +45,11 @@ import com.kingsrook.qqq.backend.module.api.actions.APIUpdateAction;
  *******************************************************************************/
 public class APIBackendModule implements QBackendModuleInterface
 {
+   static
+   {
+      QBackendModuleDispatcher.registerBackendModule(new APIBackendModule());
+   }
+
    /*******************************************************************************
     ** Method where a backend module must be able to provide its type (name).
     *******************************************************************************/

qqq-backend-module-filesystem/src/main/java/com/kingsrook/qqq/backend/module/filesystem/s3/S3BackendModule.java

@@ -29,6 +29,7 @@ import com.kingsrook.qqq.backend.core.actions.interfaces.QueryInterface;
 import com.kingsrook.qqq.backend.core.actions.interfaces.UpdateInterface;
 import com.kingsrook.qqq.backend.core.model.metadata.QBackendMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableBackendDetails;
+import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleDispatcher;
 import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
 import com.kingsrook.qqq.backend.module.filesystem.base.FilesystemBackendModuleInterface;
 import com.kingsrook.qqq.backend.module.filesystem.base.actions.AbstractBaseFilesystemAction;
@@ -48,6 +49,10 @@ public class S3BackendModule implements QBackendModuleInterface, FilesystemBacke
 {
    public static final String BACKEND_TYPE = "s3";
 
+   static
+   {
+      QBackendModuleDispatcher.registerBackendModule(new S3BackendModule());
+   }
 
    /*******************************************************************************
     ** For filesystem backends, get the module-specific action base-class, that helps

qqq-backend-module-rdbms/src/main/java/com/kingsrook/qqq/backend/module/rdbms/RDBMSBackendModule.java

@@ -35,6 +35,7 @@ import com.kingsrook.qqq.backend.core.logging.QLogger;
 import com.kingsrook.qqq.backend.core.model.actions.AbstractTableActionInput;
 import com.kingsrook.qqq.backend.core.model.metadata.QBackendMetaData;
 import com.kingsrook.qqq.backend.core.model.metadata.tables.QTableBackendDetails;
+import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleDispatcher;
 import com.kingsrook.qqq.backend.core.modules.backend.QBackendModuleInterface;
 import com.kingsrook.qqq.backend.module.rdbms.actions.AbstractRDBMSAction;
 import com.kingsrook.qqq.backend.module.rdbms.actions.RDBMSAggregateAction;
@@ -55,7 +56,10 @@ public class RDBMSBackendModule implements QBackendModuleInterface
 {
    private static final QLogger LOG = QLogger.getLogger(RDBMSBackendModule.class);
 
-
+   static
+   {
+      QBackendModuleDispatcher.registerBackendModule(new RDBMSBackendModule());
+   }
 
    /*******************************************************************************
     ** Method where a backend module must be able to provide its type (name).