Adding JMCR-Stable version

[Benchmarks_CSolver.git] / JMCR-Stable / real-world application / MyDerby-10.3 / java / engine / org / apache / derby / iapi / transaction / TransactionControl.java

diff --git a/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/iapi/transaction/TransactionControl.java b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/iapi/transaction/TransactionControl.java
new file mode 100644 (file)
index 0000000..1ba5946
--- /dev/null
+++ b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/iapi/transaction/TransactionControl.java
@@ -0,0 +1,139 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.iapi.transaction.TransactionControl\r
+\r
+   Licensed to the Apache Software Foundation (ASF) under one or more\r
+   contributor license agreements.  See the NOTICE file distributed with\r
+   this work for additional information regarding copyright ownership.\r
+   The ASF licenses this file to You under the Apache License, Version 2.0\r
+   (the "License"); you may not use this file except in compliance with\r
+   the License.  You may obtain a copy of the License at\r
+\r
+      http://www.apache.org/licenses/LICENSE-2.0\r
+\r
+   Unless required by applicable law or agreed to in writing, software\r
+   distributed under the License is distributed on an "AS IS" BASIS,\r
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+   See the License for the specific language governing permissions and\r
+   limitations under the License.\r
+\r
+ */\r
+package org.apache.derby.iapi.transaction;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Iterator;\r
+\r
+import org.apache.derby.iapi.error.ExceptionSeverity;\r
+import org.apache.derby.iapi.error.StandardException;\r
+import org.apache.derby.iapi.reference.SQLState;\r
+\r
+/**\r
+ * Provide support to transactions to manage sets of\r
+ * actions to perform at transaction boundaries.\r
+ *\r
+ * <P> Add rollback of savepoints?\r
+ * TODO: A\r
+ */\r
+public final class TransactionControl {\r
+    \r
+    private final ArrayList listeners;\r
+    \r
+    public TransactionControl()\r
+    {\r
+        listeners = new ArrayList();\r
+    }\r
+    \r
+    /**\r
+     * Add a listener to the curent transaction.\r
+     * \r
+     * A listener may be added multiple times and it will\r
+     * receive multiple callbacks.\r
+     * \r
+     */\r
+    public void addListener(TransactionListener listener)\r
+    {\r
+        listeners.add(listener);\r
+    }\r
+    \r
+    /**\r
+     * Remove a listener from the current transaction.\r
+     * \r
+     */\r
+    public void removeListener(TransactionListener listener)\r
+    {\r
+        listeners.remove(listener);\r
+    }\r
+    \r
+    /**\r
+     * Notify all listeners that a commit is about to occur.\r
+     * If a listener throws an exception then no\r
+     * further listeners will be notified and a\r
+     * StandardException with rollback severity will be thrown.\r
+     * @throws StandardException\r
+     */\r
+    public void preCommitNotify() throws StandardException\r
+    {\r
+        if (listeners.isEmpty())\r
+            return;\r
+        \r
+        for (Iterator i = listeners.iterator(); i.hasNext(); )\r
+        {\r
+            TransactionListener listener =\r
+                (TransactionListener) i.next();\r
+            \r
+            try {\r
+                if(listener.preCommit())\r
+                   i.remove();\r
+            }\r
+            catch (StandardException se) \r
+            {               \r
+                // This catches any exceptions that have Transaction severity\r
+                // or less (e.g. Statement exception).\r
+                // If we received any lesser\r
+                // error then we abort the transaction anyway.\r
+                \r
+                if (se.getSeverity() < ExceptionSeverity.TRANSACTION_SEVERITY)\r
+                {\r
+                    throw StandardException.newException(\r
+                            SQLState.XACT_COMMIT_EXCEPTION, se);\r
+                }\r
+                \r
+                throw se;\r
+                \r
+            }\r
+            \r
+        }\r
+    }\r
+    \r
+    /**\r
+     * Notify all listeners that a rollback is about to occur.\r
+     * If a listener throws an exception then no\r
+     * further listeners will be notified and a\r
+     * StandardException with shutdown database(?) severity will be thrown.\r
+     * @throws StandardException\r
+     */\r
+    public void preRollbackNotify() throws StandardException\r
+    { \r
+        if (listeners.isEmpty())\r
+            return;\r
+        \r
+        for (Iterator i = listeners.iterator(); i.hasNext(); )\r
+        {\r
+            TransactionListener listener =\r
+                (TransactionListener) i.next();\r
+            \r
+            try {\r
+                listener.preRollback();\r
+                i.remove();\r
+            } catch (StandardException se) {\r
+                // TODO: Define behaviour on exception during rollback.\r
+\r
+                if (se.getSeverity() < ExceptionSeverity.TRANSACTION_SEVERITY)\r
+                {\r
+                    \r
+                }\r
+                throw se;\r
+            }\r
+        }\r
+    }\r
+}\r