Examples of org.jitterbit.util.LockingFile

org.jitterbit.util.LockingFile

Implements a locking mechanism that uses a file to lock on. This is the strategy for obtaining the lock:

If the lock file does not exist it is created and opened. This is equivalent of obtaining the lock. The file will be closed and deleted when the application exits. This is accomplished by registering a shutdown hook with the {@link Runtime#addShutdownHook(Thread) Runtime}.
If the file exists, an attempt is made to delete it. If the delete fails it is assumed someone else is holding the lock, and this method returns false.
If the file is successfully deleted, it is recreated and reopened. The file will be closed and deleted on exit. This last step will presumably happen if the application crashes: The file will not be deleted in, the crash, but nothing is keeping it open so it can be deleted the next time we run.

@author Torgil Zethson @since 2.0.0

     *         another instance of the application is already running.
     */
    @Override
    public boolean lock(String[] args) {
        File file = new File(folder, FILE_NAME);
        LockingFile lock = new LockingFile(file);
        lock.setLogger(logger);
        return lock.acquire();
    }

    public ProjectFileLock() {
        lockFiles = Maps.newIdentityHashMap();
    }


    public synchronized boolean acquire(File location) {
        LockingFile file = new LockingFile(new File(location, FILE_NAME));
        if (file.acquire()) {
            lockFiles.put(location, file);
            return true;
        }
        return false;
    }

        }
        return false;
    }
    
    public synchronized boolean isLocked(File location) {
        LockingFile file = new LockingFile(new File(location, FILE_NAME));
        try {
            if (file.acquire()) {
                return false;
            }
            return true;
        } finally {
            file.release();
        }
    }

    public synchronized void release(ManagedProject project) {
        release(project.getLocation());
    }
    
    public synchronized void release(File location) {
        LockingFile file = lockFiles.remove(location);
        if (file != null) {
            file.release();
        }
    }

Examples of org.jitterbit.util.LockingFile

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