--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.impl.store.raw.data.ContainerUndoOperation\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.data;\r
+\r
+import org.apache.derby.iapi.services.sanity.SanityManager;\r
+import org.apache.derby.iapi.services.io.FormatIdUtil;\r
+import org.apache.derby.iapi.services.io.StoredFormatIds;\r
+\r
+import org.apache.derby.iapi.store.raw.Compensation;\r
+import org.apache.derby.iapi.store.raw.ContainerHandle;\r
+import org.apache.derby.iapi.store.raw.Loggable;\r
+import org.apache.derby.iapi.store.raw.Transaction;\r
+import org.apache.derby.iapi.store.raw.Undoable;\r
+\r
+import org.apache.derby.iapi.store.raw.data.RawContainerHandle;\r
+import org.apache.derby.iapi.store.raw.log.LogInstant;\r
+\r
+import org.apache.derby.iapi.error.StandardException;\r
+\r
+import java.io.InputStream;\r
+import java.io.ObjectOutput;\r
+import java.io.ObjectInput;\r
+import java.io.IOException;\r
+import org.apache.derby.iapi.services.io.LimitObjectInput;\r
+\r
+/** A Container undo operation rolls back the change of a Container operation */\r
+public class ContainerUndoOperation extends ContainerBasicOperation \r
+ implements Compensation \r
+{\r
+ // the operation to rollback \r
+ transient private ContainerOperation undoOp;\r
+\r
+ /** During redo, the whole operation will be reconstituted from the log */\r
+\r
+ /** \r
+ Set up a Container undo operation during run time rollback\r
+ @exception StandardException container Handle is not active\r
+ */\r
+ public ContainerUndoOperation(RawContainerHandle hdl, ContainerOperation op) \r
+ throws StandardException\r
+ {\r
+ super(hdl);\r
+ undoOp = op;\r
+ }\r
+\r
+ /*\r
+ * Formatable methods\r
+ */\r
+\r
+ // no-arg constructor, required by Formatable \r
+ public ContainerUndoOperation() { super(); }\r
+\r
+ public void writeExternal(ObjectOutput out) throws IOException \r
+ {\r
+ super.writeExternal(out);\r
+ }\r
+\r
+ /**\r
+ @exception IOException cannot read log record from log stream\r
+ @exception ClassNotFoundException cannot read ByteArray object\r
+ */\r
+ public void readExternal(ObjectInput in) \r
+ throws IOException, ClassNotFoundException\r
+ {\r
+ super.readExternal(in);\r
+ }\r
+\r
+ /**\r
+ Return my format identifier.\r
+ */\r
+ public int getTypeFormatId() {\r
+ return StoredFormatIds.LOGOP_CONTAINER_UNDO;\r
+ }\r
+\r
+ /** \r
+ Compensation method\r
+ */\r
+\r
+ /** Set up a Container undo operation during recovery redo. */\r
+ public void setUndoOp(Undoable op)\r
+ {\r
+ if (SanityManager.DEBUG) {\r
+ SanityManager.ASSERT(op instanceof ContainerOperation);\r
+ }\r
+\r
+ undoOp = (ContainerOperation)op;\r
+ }\r
+\r
+ /**\r
+ Loggable methods\r
+ */\r
+\r
+ /** Apply the undo operation, in this implementation of the\r
+ RawStore, it can only call the undoMe method of undoOp\r
+\r
+ @param xact the Transaction that is doing the rollback\r
+ @param instant the log instant of this compenstaion operation\r
+ @param in optional data\r
+\r
+ @exception IOException Can be thrown by any of the methods of ObjectInput.\r
+ @exception StandardException Standard Derby error policy.\r
+\r
+ @see ContainerOperation#generateUndo\r
+ */\r
+ public final void doMe(Transaction xact, LogInstant instant, LimitObjectInput in) \r
+ throws StandardException, IOException\r
+ {\r
+ if (SanityManager.DEBUG) {\r
+ SanityManager.ASSERT(containerHdl != null, "clr has null containerHdl");\r
+ }\r
+\r
+ // if this is called during runtime rollback, generateUndo found\r
+ // the container and have it opened there.\r
+ // if this is called during recovery redo, this.needsRedo found \r
+ // the container and have it opened here.\r
+ //\r
+ // in either case, containerHdl is the opened container handle.\r
+\r
+ undoOp.undoMe(xact, containerHdl, instant, in);\r
+ releaseResource(xact);\r
+ }\r
+\r
+ /* make sure resource found in undoOp is released */\r
+ public void releaseResource(Transaction xact)\r
+ {\r
+ if (undoOp != null)\r
+ undoOp.releaseResource(xact);\r
+ super.releaseResource(xact);\r
+ }\r
+\r
+ /* Undo operation is a COMPENSATION log operation */\r
+ public int group()\r
+ {\r
+ return super.group() | Loggable.COMPENSATION | Loggable.RAWSTORE;\r
+ }\r
+\r
+}\r
projects / Benchmarks_CSolver.git / blobdiff