ENH: allow server startup without running ddl and thus allowing starting with the database not yet up and later lazily initializing the database and running ddl

ebean-core/src/main/java/io/ebeaninternal/server/core/DatabasePlatformFactory.java

@@ -56,6 +56,10 @@ public class DatabasePlatformFactory {
       if (config.getDataSourceConfig().isOffline()) {
         throw new PersistenceException("DatabasePlatformName must be specified with offline mode");
       }
+      if (config.getTenantMode().isDynamicDataSource()) {
+        throw new IllegalStateException("DatabasePlatform must be explicitly set on ServerConfig for TenantMode "
+          + config.getTenantMode());
+      }
       // guess using meta data from driver
       return byDataSource(config.getDataSource());
 

ebean-core/src/main/java/io/ebeaninternal/server/core/DefaultServer.java

@@ -177,6 +177,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   private final long slowQueryMicros;
   private final SlowQueryListener slowQueryListener;
   private final boolean disableL2Cache;
+  private final boolean initDatabase;
   private boolean shutdown;
 
   /**
@@ -224,6 +225,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     this.serverPlugins = config.getPlugins();
     this.ddlGenerator = config.initDdlGenerator(this);
     this.scriptRunner = new DScriptRunner(this);
+    this.initDatabase = !config.getConfig().skipInitDatabase();
 
     configureServerPlugins();
     // Register with the JVM Shutdown hook
@@ -248,13 +250,21 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     }
   }
 
+  @Override
+  public void initDatabase(boolean online) {
+    if (!config.isDocStoreOnly()) {
+      ddlGenerator.execute(online);
+    }
+  }
+
   /**
    * Execute all the plugins with an online flag indicating the DB is up or not.
    */
   public void executePlugins(boolean online) {
-    if (!config.isDocStoreOnly()) {
-      ddlGenerator.execute(online);
+    if (initDatabase) {
+      initDatabase(online);
     }
+
     for (Plugin plugin : serverPlugins) {
       plugin.online(online);
     }