Examples of org.eclipse.jgit.storage.file.LockFile

org.eclipse.jgit.storage.file.LockFile
Git style file locking and replacement.
To modify a ref file Git tries to use an atomic update approach: we write the new data into a brand new file, then rename it in place over the old name. This way we can just delete the temporary file if anything goes wrong, and nothing has been damaged. To coordinate access from multiple processes at once Git tries to atomically create the new temporary file under a well-known name.

   * Unlock this file and abort this change.
   * <p>
   * The temporary file (if created) is deleted before returning.
   */
  public void unlock() {
    final LockFile tmp = myLock;
    if (tmp != null) {
      myLock = null;
      tmp.unlock();
    }
  }

View Full Code Here


  static void saveSecure(final FileBasedConfig sec) throws IOException {
    if (modified(sec)) {
      final byte[] out = Constants.encode(sec.toText());
      final File path = sec.getFile();
      final LockFile lf = new LockFile(path, FS.DETECTED);
      if (!lf.lock()) {
        throw new IOException("Cannot lock " + path);
      }
      try {
        chmod(0600, new File(path.getParentFile(), path.getName() + ".lock"));
        lf.write(out);
        if (!lf.commit()) {
          throw new IOException("Cannot commit write to " + path);
        }
      } finally {
        lf.unlock();
      }
    }
  }

View Full Code Here

    } catch (FileNotFoundException notFound) {
      // Fall through and write the file.
    }


    dst.getParentFile().mkdirs();
    LockFile lf = new LockFile(dst, FS.DETECTED);
    if (!lf.lock()) {
      throw new IOException("Cannot lock " + dst);
    }
    try {
      final OutputStream out = lf.getOutputStream();
      try {
        final byte[] tmp = new byte[4096];
        while (0 < buf.remaining()) {
          int n = Math.min(buf.remaining(), tmp.length);
          buf.get(tmp, 0, n);
          out.write(tmp, 0, n);
        }
      } finally {
        out.close();
      }
      if (!lf.commit()) {
        throw new IOException("Cannot commit " + dst);
      }
    } finally {
      lf.unlock();
    }
  }

View Full Code Here


        FileInputStream in = new FileInputStream(myWar);
        try {
          siteWar.getParentFile().mkdirs();


          LockFile lf = new LockFile(siteWar, FS.DETECTED);
          if (!lf.lock()) {
            throw new IOException("Cannot lock " + siteWar);
          }


          try {
            final OutputStream out = lf.getOutputStream();
            try {
              final byte[] tmp = new byte[4096];
              for (;;) {
                int n = in.read(tmp);
                if (n < 0) {
                  break;
                }
                out.write(tmp, 0, n);
              }
            } finally {
              out.close();
            }
            if (!lf.commit()) {
              throw new IOException("Cannot commit " + siteWar);
            }
          } finally {
            lf.unlock();
          }
        } finally {
          in.close();
        }
      }

View Full Code Here

   *             hold the lock.
   */
  public boolean lock() throws IOException {
    if (liveFile == null)
      throw new IOException(JGitText.get().dirCacheDoesNotHaveABackingFile);
    final LockFile tmp = new LockFile(liveFile, fs);
    if (tmp.lock()) {
      tmp.setNeedStatInformation(true);
      myLock = tmp;
      return true;
    }
    return false;
  }

View Full Code Here

   * @throws IOException
   *             the output file could not be created. The caller no longer
   *             holds the lock.
   */
  public void write() throws IOException {
    final LockFile tmp = myLock;
    requireLocked(tmp);
    try {
      writeTo(new BufferedOutputStream(tmp.getOutputStream()));
    } catch (IOException err) {
      tmp.unlock();
      throw err;
    } catch (RuntimeException err) {
      tmp.unlock();
      throw err;
    } catch (Error err) {
      tmp.unlock();
      throw err;
    }
  }

View Full Code Here

   *         old data.
   * @throws IllegalStateException
   *             the lock is not held.
   */
  public boolean commit() {
    final LockFile tmp = myLock;
    requireLocked(tmp);
    myLock = null;
    if (!tmp.commit())
      return false;
    lastModified = tmp.getCommitLastModified();
    return true;
  }

View Full Code Here

   * Unlock this file and abort this change.
   * <p>
   * The temporary file (if created) is deleted before returning.
   */
  public void unlock() {
    final LockFile tmp = myLock;
    if (tmp != null) {
      myLock = null;
      tmp.unlock();
    }
  }

View Full Code Here

  public void testUpdateRefLockFailureLocked() throws IOException {
    ObjectId opid = db.resolve("refs/heads/master");
    ObjectId pid = db.resolve("refs/heads/master^");
    RefUpdate updateRef = db.updateRef("refs/heads/master");
    updateRef.setNewObjectId(pid);
    LockFile lockFile1 = new LockFile(new File(db.getDirectory(),
        "refs/heads/master"), db.getFS());
    try {
      assertTrue(lockFile1.lock()); // precondition to test
      Result update = updateRef.update();
      assertEquals(Result.LOCK_FAILURE, update);
      assertEquals(opid, db.resolve("refs/heads/master"));
      LockFile lockFile2 = new LockFile(new File(db.getDirectory(),"refs/heads/master"),
          db.getFS());
      assertFalse(lockFile2.lock()); // was locked, still is
    } finally {
      lockFile1.unlock();
    }
  }

View Full Code Here


    assertTrue("internal check, we have a log", new File(db.getDirectory(),
        "logs/" + fromName).exists());


    // "someone" has branch X locked
    LockFile lockFile = new LockFile(new File(db.getDirectory(), toLock),
        db.getFS());
    try {
      assertTrue(lockFile.lock());


      // Now this is our test
      RefRename renameRef = db.renameRef(fromName, toName);
      Result result = renameRef.rename();
      assertEquals(Result.LOCK_FAILURE, result);


      // Check that the involved refs are the same despite the failure
      assertExists(false, toName);
      if (!toLock.equals(toName))
        assertExists(false, toName + ".lock");
      assertExists(true, toLock + ".lock");
      if (!toLock.equals(fromName))
        assertExists(false, "logs/" + fromName + ".lock");
      assertExists(false, "logs/" + toName + ".lock");
      assertEquals(oldHeadId, db.resolve(Constants.HEAD));
      assertEquals(oldfromId, db.resolve(fromName));
      assertNull(db.resolve(toName));
      assertEquals(oldFromLog.toString(), db.getReflogReader(fromName)
          .getReverseEntries().toString());
      if (oldHeadId != null)
        assertEquals(oldHeadLog.toString(), db.getReflogReader(
            Constants.HEAD).getReverseEntries().toString());
    } finally {
      lockFile.unlock();
    }
  }

View Full Code Here

0 1 2 3 4 5

TOP

Related Classes of org.eclipse.jgit.storage.file.LockFile

com.google.gerrit.pgm.init.InitContainer

com.google.gerrit.pgm.init.InitUtil

com.google.gerrit.pgm.ProtoGen

com.google.gerrit.server.git.LocalDiskRepositoryManager

org.eclipse.jgit.dircache.DirCache

org.eclipse.jgit.iplog.IpLogMeta

org.eclipse.jgit.junit.TestRepository

org.eclipse.jgit.pgm.debug.RebuildCommitGraph

org.eclipse.jgit.pgm.eclipse.Iplog

org.eclipse.jgit.storage.file.RefUpdateTest

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.