static void init(
      UUID initJobId,
      byte[] initEncodedPrivateKey,
      DataVertical initDataType,
      String initExportService,
      String initImportService,
      Stopwatch initStopWatch) {
    Preconditions.checkState(!isInitialized(), "JobMetadata cannot be initialized twice");
    jobId = initJobId;
    encodedPrivateKey = initEncodedPrivateKey;
    dataType = initDataType;
    exportService = initExportService;
    importService = initImportService;
    stopWatch = initStopWatch;
  }
A class that contains metadata for a transfer worker's job.

<p>

<p>This class is completely static to ensure it is a singleton within each transfer worker
instance.
portability-transfer/src/main/java/org/datatransferproject/transfer/JobMetadata.java