initial add of EbeanORM server based on v2.8.1

src/main/java/com/avaje/ebeaninternal/server/transaction/TransactionScopeManager.java

@@ -0,0 +1,58 @@
+package com.avaje.ebeaninternal.server.transaction;
+
+import com.avaje.ebeaninternal.api.SpiTransaction;
+import com.avaje.ebeaninternal.api.SpiTransactionScopeManager;
+
+/**
+ * Manages the Transactions typically held in a ThreadLocal.
+ */
+public abstract class TransactionScopeManager implements SpiTransactionScopeManager {
+
+	protected final TransactionManager transactionManager;
+	
+	protected final String serverName;
+
+	public TransactionScopeManager(TransactionManager transactionManager){
+		this.transactionManager = transactionManager;
+		this.serverName = transactionManager.getServerName();
+	}
+	
+	 /**
+     * Return the current Transaction for this serverName and Thread.
+     */
+    public abstract SpiTransaction get();
+
+    /**
+     * Set a new Transaction for this serverName and Thread.
+     */
+    public abstract void set(SpiTransaction trans);
+    
+    /**
+     * Commit the current transaction.
+     */
+    public abstract void commit();
+
+    /**
+     * Rollback the current transaction.
+     */
+    public abstract void rollback();
+
+
+    /**
+     * Rollback if required.
+     */
+    public abstract void end();
+
+    /**
+     * Replace the current transaction with this one.
+     * <p>
+     * Used for Background fetching and Nested transaction scopes.
+     * </p>
+     * <p>
+     * Used for background fetching. Replaces the current transaction with a
+     * 'dummy' transaction. The current transaction is given to the background
+     * thread so it can continue the fetch.
+     * </p>
+     */
+    public abstract void replace(SpiTransaction trans);
+}