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[utils] / test / enterprise / src / main / java / org / wamblee / test / transactions / SimpleTransactionManager.java

diff --git a/test/enterprise/src/main/java/org/wamblee/test/transactions/SimpleTransactionManager.java b/test/enterprise/src/main/java/org/wamblee/test/transactions/SimpleTransactionManager.java
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+/*
+ * Copyright 2005-2010 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.wamblee.test.transactions;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.transaction.UserTransaction;
+
+/**
+ * Simple transaction manager provides a simple mechanism to manage transaction
+ * in test code through the {@link UserTransaction} object.
+ * 
+ * @author Erik Brakkee
+ * 
+ */
+public class SimpleTransactionManager {
+
+    private UserTransactionFactory factory;
+    private ThreadLocal<UserTransaction> current;
+    private UserTransactionCallback callback;
+    private List<TransactionResource> resources;
+
+    /**
+     * Constructs the transaction manager.
+     * 
+     * @param aFactory
+     *            Factory to create transactions with.
+     */
+    public SimpleTransactionManager(UserTransactionFactory aFactory) {
+        factory = aFactory;
+        current = new ThreadLocal<UserTransaction>();
+        callback = new UserTransactionCallback() {
+
+            @Override
+            public void transactionFinished() {
+                current.set(null);
+            }
+        };
+        resources = new ArrayList<TransactionResource>();
+    }
+
+    /**
+     * Adds a resource to manage. Adding resources is no longer allowed after
+     * the first transaction has started.
+     * 
+     * @param aResource
+     *            Resource.
+     */
+    public void addResource(TransactionResource aResource) {
+        resources.add(aResource);
+    }
+
+    /**
+     * Gets a transaction associated with the current thread.
+     * 
+     * @return User transaction.
+     */
+    public UserTransaction getTransaction() {
+        UserTransaction transaction = current.get();
+        if (transaction == null) {
+            transaction = factory.create(callback, resources);
+            current.set(transaction);
+        }
+        return transaction;
+    }
+}