RunCachesManager.java

package jetbrains.mps.baseLanguage.unitTest.execution.client;

/*Generated by MPS */

import java.util.List;
import java.io.File;
import java.util.ArrayList;
import java.io.IOException;

public class RunCachesManager {
  private static final Object ourLock = new Object();
  private static List<File> ourDirectories = new ArrayList<File>();

  private static boolean isChild(File child, File parent) {
    return parent.getAbsolutePath().startsWith(child.getAbsolutePath());
  }

  public static boolean acquireLock(String path) {
    synchronized (ourLock) {
      try {
        File newDir = new File(path).getCanonicalFile();
        for (File dir : ourDirectories) {
          if (isChild(dir, newDir) || isChild(newDir, dir)) {
            return false;
          }
        }
        return ourDirectories.add(newDir);
      } catch (IOException e) {
        e.printStackTrace();
        return false;
      }
    }
  }

  public static boolean isLocked(String path) {
    synchronized (ourLock) {
      try {
        File newDir = new File(path).getCanonicalFile();
        for (File dir : ourDirectories) {
          if (isChild(dir, newDir) || isChild(newDir, dir)) {
            return true;
          }
        }
        return false;
      } catch (IOException e) {
        e.printStackTrace();
        return true;
      }
    }
  }

  public static void releaseLock(String path) {
    synchronized (ourLock) {
      try {
        File dir = new File(path).getCanonicalFile();
        boolean result = ourDirectories.remove(dir);
        assert result : "There is no lock to release for the directory " + dir;
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }
}