pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / src / java / org / apache / lucene / store / SimpleFSLockFactory.java

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/store/SimpleFSLockFactory.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/store/SimpleFSLockFactory.java
deleted file mode 100755 (executable)
index 1f532aa..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/store/SimpleFSLockFactory.java
+++ /dev/null
@@ -1,145 +0,0 @@
-package org.apache.lucene.store;
-
-/**
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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.
- */
-
-import java.io.File;
-import java.io.IOException;
-
-/**
- * <p>Implements {@link LockFactory} using {@link
- * File#createNewFile()}.</p>
- *
- * <p><b>NOTE:</b> the <a target="_top"
- * href="http://java.sun.com/j2se/1.4.2/docs/api/java/io/File.html#createNewFile()">javadocs
- * for <code>File.createNewFile</code></a> contain a vague
- * yet spooky warning about not using the API for file
- * locking.  This warning was added due to <a target="_top"
- * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4676183">this
- * bug</a>, and in fact the only known problem with using
- * this API for locking is that the Lucene write lock may
- * not be released when the JVM exits abnormally.</p>
-
- * <p>When this happens, a {@link LockObtainFailedException}
- * is hit when trying to create a writer, in which case you
- * need to explicitly clear the lock file first.  You can
- * either manually remove the file, or use the {@link
- * org.apache.lucene.index.IndexWriter#unlock(Directory)}
- * API.  But, first be certain that no writer is in fact
- * writing to the index otherwise you can easily corrupt
- * your index.</p>
- *
- * <p>If you suspect that this or any other LockFactory is
- * not working properly in your environment, you can easily
- * test it by using {@link VerifyingLockFactory}, {@link
- * LockVerifyServer} and {@link LockStressTest}.</p>
- *
- * @see LockFactory
- */
-
-public class SimpleFSLockFactory extends FSLockFactory {
-
-  /**
-   * Create a SimpleFSLockFactory instance, with null (unset)
-   * lock directory. When you pass this factory to a {@link FSDirectory}
-   * subclass, the lock directory is automatically set to the
-   * directory itself. Be sure to create one instance for each directory
-   * your create!
-   */
-  public SimpleFSLockFactory() throws IOException {
-    this((File) null);
-  }
-
-  /**
-   * Instantiate using the provided directory (as a File instance).
-   * @param lockDir where lock files should be created.
-   */
-  public SimpleFSLockFactory(File lockDir) throws IOException {
-    setLockDir(lockDir);
-  }
-
-  /**
-   * Instantiate using the provided directory name (String).
-   * @param lockDirName where lock files should be created.
-   */
-  public SimpleFSLockFactory(String lockDirName) throws IOException {
-    setLockDir(new File(lockDirName));
-  }
-
-  @Override
-  public Lock makeLock(String lockName) {
-    if (lockPrefix != null) {
-      lockName = lockPrefix + "-" + lockName;
-    }
-    return new SimpleFSLock(lockDir, lockName);
-  }
-
-  @Override
-  public void clearLock(String lockName) throws IOException {
-    if (lockDir.exists()) {
-      if (lockPrefix != null) {
-        lockName = lockPrefix + "-" + lockName;
-      }
-      File lockFile = new File(lockDir, lockName);
-      if (lockFile.exists() && !lockFile.delete()) {
-        throw new IOException("Cannot delete " + lockFile);
-      }
-    }
-  }
-}
-
-class SimpleFSLock extends Lock {
-
-  File lockFile;
-  File lockDir;
-
-  public SimpleFSLock(File lockDir, String lockFileName) {
-    this.lockDir = lockDir;
-    lockFile = new File(lockDir, lockFileName);
-  }
-
-  @Override
-  public boolean obtain() throws IOException {
-
-    // Ensure that lockDir exists and is a directory:
-    if (!lockDir.exists()) {
-      if (!lockDir.mkdirs())
-        throw new IOException("Cannot create directory: " +
-                              lockDir.getAbsolutePath());
-    } else if (!lockDir.isDirectory()) {
-      throw new IOException("Found regular file where directory expected: " + 
-                            lockDir.getAbsolutePath());
-    }
-    return lockFile.createNewFile();
-  }
-
-  @Override
-  public void release() throws LockReleaseFailedException {
-    if (lockFile.exists() && !lockFile.delete())
-      throw new LockReleaseFailedException("failed to delete " + lockFile);
-  }
-
-  @Override
-  public boolean isLocked() {
-    return lockFile.exists();
-  }
-
-  @Override
-  public String toString() {
-    return "SimpleFSLock@" + lockFile;
-  }
-}