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authorKevin Sawicki2012-01-09 16:46:13 +0000
committerKevin Sawicki2012-01-09 16:46:13 +0000
commitaebfc70cc84b1492cd3f5df04dd9b057d0bec1f7 (patch)
tree05a4e86b892548663f28eaf2953a574f58a89a70 /org.eclipse.jgit
parent0f15d656f26d48516eee661bacfd7e9750b35ab3 (diff)
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Provide helper for unlocking a file
This will allow recovery from a LockFailedException where the file associated with an exception is passed to FileUtils.unlock to attempt an unlock on the file so the operation can be retried Change-Id: I580166d386126bfb54a318a65253070a6e325936
Diffstat (limited to 'org.eclipse.jgit')
-rw-r--r--org.eclipse.jgit/src/org/eclipse/jgit/storage/file/LockFile.java36
1 files changed, 34 insertions, 2 deletions
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/LockFile.java b/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/LockFile.java
index 08dfd7e19b..dd58fecf59 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/LockFile.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/LockFile.java
@@ -57,6 +57,7 @@ import java.nio.channels.FileChannel;
import java.text.MessageFormat;
import org.eclipse.jgit.JGitText;
+import org.eclipse.jgit.errors.LockFailedException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.util.FS;
@@ -75,6 +76,37 @@ import org.eclipse.jgit.util.FileUtils;
public class LockFile {
static final String SUFFIX = ".lock"; //$NON-NLS-1$
+ /**
+ * Unlock the given file.
+ * <p>
+ * This method can be used for recovering from a thrown
+ * {@link LockFailedException} . This method does not validate that the lock
+ * is or is not currently held before attempting to unlock it.
+ *
+ * @param file
+ * @return true if unlocked, false if unlocking failed
+ */
+ public static boolean unlock(final File file) {
+ final File lockFile = getLockFile(file);
+ final int flags = FileUtils.RETRY | FileUtils.SKIP_MISSING;
+ try {
+ FileUtils.delete(lockFile, flags);
+ } catch (IOException ignored) {
+ // Ignore and return whether lock file still exists
+ }
+ return !lockFile.exists();
+ }
+
+ /**
+ * Get the lock file corresponding to the given file.
+ *
+ * @param file
+ * @return lock file
+ */
+ static File getLockFile(File file) {
+ return new File(file.getParentFile(), file.getName() + SUFFIX);
+ }
+
/** Filter to skip over active lock files when listing a directory. */
static final FilenameFilter FILTER = new FilenameFilter() {
public boolean accept(File dir, String name) {
@@ -107,9 +139,9 @@ public class LockFile {
* the file system abstraction which will be necessary to perform
* certain file system operations.
*/
- public LockFile(final File f, FS fs) {
+ public LockFile(final File f, final FS fs) {
ref = f;
- lck = new File(ref.getParentFile(), ref.getName() + SUFFIX);
+ lck = getLockFile(ref);
this.fs = fs;
}

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