Metacat

import edu.ucsb.nceas.metacat.restservice.v2.MNResourceHandler;

          this.cn = D1Client.getCN();

          // run it in a thread to avoid connection timeout

          Runnable runner = new Runnable() {

              private CNode cNode = null;

              private SystemMetadata sys = null;

              private Identifier id = null;

              @Override

              public void run() {

                  try {

                      if(this.cNode == null)  {

                          logMetacat.warn("MNodeService.updateSystemMetadata - can't get the instance of the CN. So can't call cn.synchronize to update the system metadata in CN.");

                      } else if(id != null) {

                          logMetacat.info("MNodeService.updateSystemMetadata - calling cn.synchornized in another thread for pid "+id.getValue());

                          this.cNode.synchronize(null, id);

                      } else {

                          logMetacat.warn("MNodeService.updateSystemMetadata - can't update system metadata in CN can't be updated.");

                      }

                  } catch (BaseException e) {

                      e.printStackTrace();

                      logMetacat.error("It is a DataONEBaseException and its detail code is "+e.getDetail_code() +" and its code is "+e.getCode());

                      logMetacat.error("Can't update the systemmetadata of pid "+id.getValue()+" in CNs through cn.synchronize method since "+e.getMessage(), e);

                  } catch (Exception e) {

                      e.printStackTrace();

                      logMetacat.error("Can't update the systemmetadata of pid "+id.getValue()+" in CNs through cn.synchronize method since "+e.getMessage(), e);

                  }

                  // attempt to re-register the identifier (it checks if it is a doi)

                  try {

                      logMetacat.info("MNodeSerice.updateSystemMetadata - register doi if the pid "+sys.getIdentifier().getValue()+" is a doi");

                      DOIService.getInstance().registerDOI(sys);

                  } catch (Exception e) {

                    logMetacat.warn("Could not [re]register DOI: " + e.getMessage(), e);

                  }

              private Runnable init(CNode cn, SystemMetadata sys, Identifier id){

                  this.cNode = cn;

                  this.sys = sys;

                  this.id = id;

                  return this;

              }

          }.init(cn, sysmeta, pid);

          // submit the task, and that's it

          if(MNResourceHandler.getExecutorService() != null) {

              MNResourceHandler.getExecutorService().submit(runner);

          } else {

              logMetacat.error("MNodeSerivce.updateSystemMetadata - since the executor service for submit the change to cn is null, the system metadata change of the id "+pid.getValue()+" can't go to cn by the method through cn.synchronize.");

	/**

     * Get the executor from the service. 

     * @return

     */

    public static ExecutorService getExecutorService() {

        return executor;

    }