Method getGnuplotBasePath

src/tsd/GraphHandler.java:426–438

Returns the base path to use for the Gnuplot files.

(final TSDB tsdb, final HttpQuery query)

  /** Returns the base path to use for the Gnuplot files. */
  private String getGnuplotBasePath(final TSDB tsdb, final HttpQuery query) {
    final Map<String, List<String>> q = query.getQueryString();
    q.remove("ignore");
    // Super cheap caching mechanism: hash the query string.
    final HashMap<String, List<String>> qs =
      new HashMap<String, List<String>>(q);
    // But first remove the parameters that don't influence the output.
    qs.remove("png");
    qs.remove("json");
    qs.remove("ascii");
    return tsdb.getConfig().getDirectoryName("tsd.http.cachedir") +
        Integer.toHexString(qs.hashCode());
  }

  /**
   * Checks whether or not it's possible to re-serve this query from disk.