--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.impl.store.raw.data.RemoveFileOperation\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.store.raw.Loggable;\r
+import org.apache.derby.iapi.store.raw.Undoable;\r
+import org.apache.derby.iapi.store.raw.Transaction;\r
+import org.apache.derby.iapi.store.raw.Compensation;\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.xact.RawTransaction;\r
+\r
+import org.apache.derby.iapi.error.StandardException;\r
+import org.apache.derby.iapi.services.sanity.SanityManager;\r
+import org.apache.derby.iapi.store.access.FileResource;\r
+import org.apache.derby.iapi.store.raw.log.LogInstant;\r
+\r
+import org.apache.derby.io.StorageFile;\r
+\r
+import org.apache.derby.iapi.util.ByteArray;\r
+\r
+import java.io.ObjectInput;\r
+import java.io.ObjectOutput;\r
+import java.io.IOException;\r
+import java.io.InputStream;\r
+import org.apache.derby.iapi.services.io.LimitObjectInput;\r
+\r
+/** \r
+*/\r
+\r
+public class RemoveFileOperation implements Undoable\r
+{\r
+ private String name;\r
+ private long generationId;\r
+ private boolean removeAtOnce;\r
+\r
+ transient private StorageFile fileToGo;\r
+\r
+ // no-arg constructor, required by Formatable\r
+ public RemoveFileOperation()\r
+ {\r
+ }\r
+\r
+ RemoveFileOperation(String name, long generationId, boolean removeAtOnce)\r
+ {\r
+ this.name = name;\r
+ this.generationId = generationId;\r
+ this.removeAtOnce = removeAtOnce;\r
+ }\r
+\r
+ /*\r
+ * Formatable methods\r
+ */\r
+ public void writeExternal(ObjectOutput out) throws IOException\r
+ {\r
+ out.writeUTF(name);\r
+ out.writeLong(generationId);\r
+ out.writeBoolean(removeAtOnce);\r
+ }\r
+\r
+ public void readExternal(ObjectInput in) \r
+ throws IOException, ClassNotFoundException \r
+ {\r
+ name = in.readUTF();\r
+ generationId = in.readLong();\r
+ removeAtOnce = in.readBoolean();\r
+ }\r
+ /**\r
+ Return my format identifier.\r
+ */\r
+ public int getTypeFormatId() {\r
+ return StoredFormatIds.LOGOP_REMOVE_FILE;\r
+ }\r
+\r
+\r
+ /**\r
+ Loggable methods\r
+ */\r
+\r
+ /**\r
+ the default for prepared log is always null for all the operations\r
+ that don't have optionalData. If an operation has optional data,\r
+ the operation need to prepare the optional data for this method.\r
+\r
+ Space Operation has no optional data to write out\r
+ */\r
+ public ByteArray getPreparedLog()\r
+ {\r
+ return null;\r
+ }\r
+\r
+ public void releaseResource(Transaction tran)\r
+ {\r
+ }\r
+\r
+ /**\r
+ A space operation is a RAWSTORE log record\r
+ */\r
+ public int group()\r
+ {\r
+ return Loggable.FILE_RESOURCE | Loggable.RAWSTORE ;\r
+ }\r
+\r
+ public void doMe(Transaction xact, LogInstant instant, \r
+ LimitObjectInput in)\r
+ throws StandardException\r
+ {\r
+ if (fileToGo == null)\r
+ return;\r
+\r
+ BaseDataFileFactory bdff = \r
+ (BaseDataFileFactory) ((RawTransaction) xact).getDataFactory();\r
+ \r
+ bdff.fileToRemove(fileToGo, true);\r
+ }\r
+\r
+\r
+ /**\r
+ @exception StandardException Standard Derby error policy\r
+ */\r
+ public boolean needsRedo(Transaction xact)\r
+ throws StandardException\r
+ {\r
+ if (!removeAtOnce)\r
+ return false;\r
+\r
+ FileResource fr = ((RawTransaction) xact).getDataFactory().getFileHandler();\r
+\r
+ fileToGo = fr.getAsFile(name, generationId);\r
+\r
+ if (fileToGo == null)\r
+ return false;\r
+\r
+ return fileToGo.exists();\r
+ }\r
+\r
+\r
+ public Compensation generateUndo(Transaction xact, LimitObjectInput in)\r
+ throws StandardException, IOException {\r
+\r
+\r
+ if (fileToGo != null) {\r
+ BaseDataFileFactory bdff = \r
+ (BaseDataFileFactory) ((RawTransaction) xact).getDataFactory();\r
+ \r
+ bdff.fileToRemove(fileToGo, false);\r
+ }\r
+\r
+ return null;\r
+ }\r
+}\r
+\r
+\r
projects / Benchmarks_CSolver.git / blobdiff