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Revision 6178

Add a static getInstance() method to CNodeService and make CNodeService a singleton.

     import java.io.InputStream;
     import java.util.Date;
     import org.apache.log4j.Logger;
     import org.dataone.service.cn.CNAuthorization;
     import org.dataone.service.cn.CNCore;
     import org.dataone.service.cn.CNIdentity;
-...
     public class CNodeService extends D1NodeService implements CNAuthorization,
         CNCore, CNIdentity, CNRead, CNRegister, CNReplication {
     	/* the instance of the CNodeService object */
       private static CNodeService instance = null;
       /* the logger instance */
       private Logger logMetacat = null;
     	/**
     	 * Constructor: create a CNodeService instance
     	 * TODO: should we make this a singleton class like CNCoreImpl?
     	 */
     	public CNodeService() {
         super();
       /**
        * singleton accessor
        */
       public static CNodeService getInstance()
+      {
         if (instance == null) {
           instance = new CNodeService();
+        }
+    	}
         return instance;
+      }
       /**
        * Constructor, private for singleton access
        */
       private CNodeService() {
       	super();
         logMetacat = Logger.getLogger(CNodeService.class);
+      }
     	/**
     	 * Set the replication policy for an object given the object identifier
+    	 *

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