public EstablishResult invoke(File workspace, VirtualChannel channel) throws IOException {

    out = listener.getLogger();

    logger = Logger.getLogger();

    StreamAppender app = null;
    if (pipe != null) {
      PrintStream toMaster = new PrintStream(pipe.getOut());
      app = new StreamAppender(toMaster);
      app.lockToCurrentThread();
      Logger.addAppender(app);
      app.setSettings(loggerSetting);
    } else if (pstream != null) {
      app = new StreamAppender(pstream);
      app.lockToCurrentThread();
      Logger.addAppender(app);
      app.setSettings(loggerSetting);
    }

    logger.debug("Starting remote deliver");

    this.workspace = workspace;

    /* Create the baseline object */
    Baseline baseline = null;
    try {
      baseline = Baseline.get(this.baseline).load();
    } catch (Exception e) {
      Logger.removeAppender(app);
      throw new IOException("Could not create Baseline object: " + e.getMessage(), e);
    }

    logger.debug(baseline + " created");

    /* Create the development stream object */
    /* Append vob to dev stream */

    Stream destinationStream = null;
    try {
      destinationStream = Stream.get(this.destinationstream).load();
    } catch (Exception e) {
      Logger.removeAppender(app);
      throw new IOException("Could not create destination Stream object: " + e.getMessage(), e);
    }

    logger.debug(destinationStream + " created");

    /* Make deliver view */
    try {
      snapview = makeDeliverView(destinationStream, workspace);
    } catch (Exception e) {
      Logger.removeAppender(app);
      throw new IOException("Could not create deliver view: " + e.getMessage(), e);
    }

    logger.debug("View: " + workspace);

    String diff = "";
    ClearCaseChangeset changeset = new ClearCaseChangeset();

    try {
      List<Activity> bldiff =
          Version.getBaselineDiff(destinationStream, baseline, true, snapview.getViewRoot());
      out.print(
          "["
              + Config.nameShort
              + "] Found "
              + bldiff.size()
              + " activit"
              + (bldiff.size() == 1 ? "y" : "ies")
              + ". ");

      int c = 0;
      for (Activity a : bldiff) {
        c += a.changeset.versions.size();
        for (Version version : a.changeset.versions) {
          changeset.addChange(version.getFullyQualifiedName(), version.getUser());
        }
      }
      out.println(c + " version" + (c == 1 ? "" : "s") + " involved");
      diff = Util.createChangelog(bldiff, baseline);
    } catch (Exception e1) {
      out.println("[" + Config.nameShort + "] Unable to create change log: " + e1.getMessage());
    }

    logger.debug("Changeset created");

    EstablishResult er = new EstablishResult(viewtag);
    er.setView(snapview);
    er.setMessage(diff);
    er.setChangeset(changeset);

    /* Make the deliver. Inline manipulation of er */
    deliver(baseline, destinationStream, er, forceDeliver, 2);

    /* End of deliver */
    Logger.removeAppender(app);
    return er;
  }
  private void deliver(
      Baseline baseline, Stream dstream, EstablishResult er, boolean forceDeliver, int triesLeft)
      throws IOException {
    logger.verbose(
        "Delivering "
            + baseline.getShortname()
            + " to "
            + dstream.getShortname()
            + ". Tries left: "
            + triesLeft);
    if (triesLeft < 1) {
      out.println("[" + Config.nameShort + "] Unable to deliver, giving up.");
      er.setResultType(ResultType.DELIVER_IN_PROGRESS_NOT_CANCELLED);
      return;
    }

    Deliver deliver = null;
    try {
      out.println("[" + Config.nameShort + "] Starting deliver(tries left: " + triesLeft + ")");
      deliver =
          new Deliver(
              baseline,
              baseline.getStream(),
              dstream,
              snapview.getViewRoot(),
              snapview.getViewtag());
      deliver.deliver(true, false, true, false);
      // baseline.deliver( baseline.getStream(), dstream, snapview.getViewRoot(),
      // snapview.getViewtag(), true, false, true );
      er.setResultType(ResultType.SUCCESS);
    } catch (DeliverException e) {
      out.println("[" + Config.nameShort + "] Failed to deliver: " + e.getMessage());
      logger.debug("Failed to deliver: " + e.getMessage());
      logger.debug(e);

      /* Figure out what happened */
      if (e.getType().equals(DeliverException.Type.REQUIRES_REBASE)) {
        er.setResultType(ResultType.DELIVER_REQUIRES_REBASE);
      }

      if (e.getType().equals(DeliverException.Type.MERGE_ERROR)) {
        er.setResultType(ResultType.MERGE_ERROR);
      }

      if (e.getType().equals(DeliverException.Type.INTERPROJECT_DELIVER_DENIED)) {
        er.setResultType(ResultType.INTERPROJECT_DELIVER_DENIED);
      }

      if (e.getType().equals(DeliverException.Type.DELIVER_IN_PROGRESS)) {
        out.println("[" + Config.nameShort + "] Deliver already in progress");

        if (!forceDeliver) {
          er.setResultType(ResultType.DELIVER_IN_PROGRESS);
        } else {

          /**
           * rollback deliver.. *******A DELIVER OPERATION IS ALREADY IN PROGRESS. Details about the
           * delivery:
           *
           * <p><b Deliver operation in progress on stream "stream:pds316_deliver_test@\PDS_PVOB"/>
           * Started by "PDS316" on "2011-09-28T11:23:53+02:00" Using integration activity
           * "deliver.pds316_deliver_test.20110928.112353". <bUsing view "pds316_deliver_test_int"
           * />. Baselines will be delivered to the default target stream
           * "stream:deliver_test_int@\PDS_PVOB" in project "project:deliver_test@\PDS_PVOB".
           *
           * <p>Baselines to be delivered:
           *
           * <p>*******Please try again later.
           */
          String msg = e.getMessage();
          String stream = "";
          String oldViewtag = null;

          out.println("[" + Config.nameShort + "] Forcing this deliver.");

          Pattern STREAM_PATTERN =
              Pattern.compile("Deliver operation .* on stream \\\"(.*)\\\"", Pattern.MULTILINE);
          Pattern TAG_PATTERN = Pattern.compile("Using view \\\"(.*)\\\".", Pattern.MULTILINE);

          Matcher mSTREAM = STREAM_PATTERN.matcher(msg);
          while (mSTREAM.find()) {
            stream = mSTREAM.group(1);
          }

          Matcher mTAG = TAG_PATTERN.matcher(msg);
          while (mTAG.find()) {
            oldViewtag = mTAG.group(1);
          }

          File newView = null;
          if (oldViewtag == null) {
            newView = snapview.getViewRoot();
          } else {
            newView = new File(workspace + "\\rm_delv_view");
          }

          try {
            // rolling back the previous deliver operation
            Stream ostream =
                Stream.get(stream, baseline.getPVob())
                    .load(); // .deliverRollBack( oldViewtag, newView );
            Deliver.rollBack(oldViewtag, ostream, newView);
          } catch (ClearCaseException ex) {
            out.println(ex.getMessage());
            throw new IOException(ex.getMessage(), ex.getCause());
          }

          // Recursive method call of INVOKE(...);
          logger.verbose("Trying to deliver again...");
          deliver(baseline, dstream, er, forceDeliver, triesLeft - 1);
        }
      }
    } catch (CleartoolException e) {
      logger.warning("Unable to get status from stream: " + e.getMessage());
      throw new IOException(e);
    } catch (Exception e) {
      logger.warning("Unable deliver: " + e.getMessage());

      throw new IOException(e);
    }
  }