Adding JMCR-Stable version

[Benchmarks_CSolver.git] / JMCR-Stable / real-world application / MyDerby-10.3 / java / engine / org / apache / derby / impl / store / raw / xact / ContainerLocking3.java

diff --git a/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/store/raw/xact/ContainerLocking3.java b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/store/raw/xact/ContainerLocking3.java
new file mode 100644 (file)
index 0000000..54057c6
--- /dev/null
+++ b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/store/raw/xact/ContainerLocking3.java
@@ -0,0 +1,81 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.impl.store.raw.xact.ContainerLocking3\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
+\r
+package org.apache.derby.impl.store.raw.xact;\r
+\r
+import org.apache.derby.iapi.services.locks.LockFactory;\r
+import org.apache.derby.iapi.services.locks.C_LockFactory;\r
+\r
+import org.apache.derby.iapi.store.raw.ContainerHandle;\r
+import org.apache.derby.iapi.store.raw.ContainerLock;\r
+import org.apache.derby.iapi.store.raw.Transaction;\r
+\r
+import org.apache.derby.iapi.error.StandardException;\r
+\r
+\r
+/**\r
+       A locking policy that implements container level locking with\r
+       isolation degree 3.\r
+\r
+       @see org.apache.derby.iapi.store.raw.LockingPolicy\r
+*/\r
+public class ContainerLocking3 extends NoLocking {\r
+\r
+       protected final LockFactory     lf;\r
+\r
+       protected ContainerLocking3(LockFactory lf)\r
+    {\r
+               this.lf = lf;\r
+       }\r
+\r
+       /**\r
+               Obtain a Container shared or exclusive lock     until\r
+               the end of the nested transaction.\r
+\r
+               @exception StandardException Standard Derby error policy\r
+       */\r
+       public boolean lockContainer(\r
+    Transaction     t, \r
+    ContainerHandle container, \r
+    boolean         waitForLock,\r
+    boolean         forUpdate)\r
+               throws StandardException\r
+    {\r
+               Object qualifier = forUpdate ? ContainerLock.CX : ContainerLock.CS;\r
+\r
+               return(\r
+            lf.lockObject(\r
+                t.getCompatibilitySpace(), t, container.getId(), qualifier,\r
+                waitForLock ? \r
+                    C_LockFactory.TIMED_WAIT : C_LockFactory.NO_WAIT));\r
+       }\r
+\r
+       public int getMode() {\r
+               return MODE_CONTAINER;\r
+       }\r
+\r
+\r
+       /*\r
+       ** We can inherit all the others methods of NoLocking since we hold the \r
+    ** container lock until the end of transaction, and we don't obtain row\r
+    ** locks.\r
+       */\r
+}\r