/**
   * First positive integer that is not present in started set.
   *
   * @param started Already started indices.
   * @return First positive integer that is not present in started set.
   */
  private int nextIndex(Collection<Integer> started) {
    assert started.contains(0);

    for (int i = 1; i < 10000; i++) {
      if (!started.contains(i)) return i;
    }

    throw new IllegalStateException();
  }
  /**
   * @param meta Request metadata.
   * @return {@code True} if class loader is obsolete.
   */
  private boolean isDeadClassLoader(GridDeploymentMetadata meta) {
    assert Thread.holdsLock(mux);

    synchronized (mux) {
      if (deadClsLdrs.contains(meta.classLoaderId())) {
        if (log.isDebugEnabled()) log.debug("Ignoring request for obsolete class loader: " + meta);

        return true;
      }

      return false;
    }
  }
  /** {@inheritDoc} */
  @Override
  public Collection<GridDeployment> getDeployments() {
    Collection<GridDeployment> deps = new ArrayList<GridDeployment>();

    synchronized (mux) {
      for (List<GridDeployment> depList : cache.values()) {
        for (GridDeployment d : depList) {
          if (!deps.contains(d)) {
            deps.add(d);
          }
        }
      }

      return deps;
    }
  }