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/**
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* '$RCSfile$'
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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*
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* '$Author: $'
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* '$Date: 2009-06-13 15:28:13 +0300 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat.dataone;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.sql.SQLException;
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import java.util.Date;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.Timer;
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import javax.servlet.ServletContext;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.io.IOUtils;
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import org.apache.log4j.Logger;
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import org.dataone.service.exceptions.IdentifierNotUnique;
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import org.dataone.service.exceptions.InsufficientResources;
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import org.dataone.service.exceptions.InvalidRequest;
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import org.dataone.service.exceptions.InvalidSystemMetadata;
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import org.dataone.service.exceptions.InvalidToken;
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import org.dataone.service.exceptions.NotAuthorized;
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import org.dataone.service.exceptions.NotFound;
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import org.dataone.service.exceptions.NotImplemented;
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import org.dataone.service.exceptions.ServiceFailure;
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import org.dataone.service.exceptions.UnsupportedType;
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import org.dataone.service.mn.MemberNodeCrud;
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import org.dataone.service.types.AuthToken;
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import org.dataone.service.types.Checksum;
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import org.dataone.service.types.DescribeResponse;
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import org.dataone.service.types.Identifier;
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import org.dataone.service.types.LogRecordSet;
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import org.dataone.service.types.SystemMetadata;
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import com.gc.iotools.stream.is.InputStreamFromOutputStream;
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import edu.ucsb.nceas.metacat.AccessionNumberException;
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import edu.ucsb.nceas.metacat.DocumentImpl;
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import edu.ucsb.nceas.metacat.EventLog;
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import edu.ucsb.nceas.metacat.IdentifierManager;
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import edu.ucsb.nceas.metacat.McdbDocNotFoundException;
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import edu.ucsb.nceas.metacat.McdbException;
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import edu.ucsb.nceas.metacat.MetacatHandler;
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import edu.ucsb.nceas.metacat.client.InsufficientKarmaException;
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import edu.ucsb.nceas.metacat.properties.PropertyService;
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import edu.ucsb.nceas.metacat.replication.ForceReplicationHandler;
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import edu.ucsb.nceas.metacat.service.SessionService;
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import edu.ucsb.nceas.metacat.util.SessionData;
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import edu.ucsb.nceas.utilities.ParseLSIDException;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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/**
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*
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* Implements DataONE MemberNode CRUD API for Metacat.
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*
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* @author Matthew Jones
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*/
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public class CrudService implements MemberNodeCrud {
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private ServletContext servletContext;
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private HttpServletRequest request;
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private HttpServletResponse response;
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// private Logger logMetacat;
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private MetacatHandler handler;
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// private String username;
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// private String password;
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// private String sessionId;
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// private String[] groupNames;
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private Hashtable<String, String[]> params;
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Logger logMetacat = null;
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/**
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* Initializes new instance by setting servlet context,request and response.
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* TODO: remove dependency on Servlet infrastructure
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* TODO: Make this a real service, and make it a Singleton
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*/
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public CrudService(ServletContext servletContext,
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HttpServletRequest request, HttpServletResponse response) {
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this.servletContext = servletContext;
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this.request = request;
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this.response = response;
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logMetacat = Logger.getLogger(CrudService.class);
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handler = new MetacatHandler(this.servletContext, new Timer());
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initParams();
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// loadSessionData();
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}
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/**
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* copies request parameters to a Hashtable which is given as argument to
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* native MetacatHandler functions
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*/
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private void initParams() {
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String name = null;
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String[] value = null;
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params = new Hashtable<String, String[]>();
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Enumeration paramlist = request.getParameterNames();
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while (paramlist.hasMoreElements()) {
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name = (String) paramlist.nextElement();
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value = request.getParameterValues(name);
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params.put(name, value);
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}
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}
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/**
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*
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* Load user details of metacat session from the request
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*
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*/
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// private void loadSessionData() {
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// SessionData sessionData = RequestUtil.getSessionData(request);
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//
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// // TODO: validate the session before allowing these values to be set
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// username = sessionData.getUserName();
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// password = sessionData.getPassword();
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// groupNames = sessionData.getGroupNames();
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// sessionId = sessionData.getId();
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//
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// if (username == null) {
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// username = "public";
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// }
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// }
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/*
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* Look up the information on the session using the token provided in
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* the AuthToken. The Session should have all relevant user information.
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* If the session has expired or is invalid, the 'public' session will
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* be returned, giving the user anonymous access.
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*/
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private static SessionData getSessionData(AuthToken token) {
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SessionData sessionData = null;
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String sessionId = "PUBLIC";
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if (token != null) {
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sessionId = token.getToken();
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}
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// if the session id is registered in SessionService, get the
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// SessionData for it. Otherwise, use the public session.
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if (SessionService.isSessionRegistered(sessionId)) {
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sessionData = SessionService.getRegisteredSession(sessionId);
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} else {
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sessionData = SessionService.getPublicSession();
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}
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return sessionData;
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}
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public Identifier create(AuthToken token, Identifier guid,
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InputStream object, SystemMetadata sysmeta) throws InvalidToken,
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ServiceFailure, NotAuthorized, IdentifierNotUnique, UnsupportedType,
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InsufficientResources, InvalidSystemMetadata, NotImplemented {
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logMetacat.debug("Starting CrudService.create()...");
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// TODO: authenticate & get user info
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String username = "GARBAGETOBEREPLACED";
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String[] groups = null;
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// verify that guid == SystemMetadata.getIdentifier()
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logMetacat.debug("Comparing guid|sysmeta_guid: " + guid.getValue() + "|" + sysmeta.getIdentifier().getValue());
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// if (!guid.getIdentifier().equals(sysmeta.getIdentifier().getIdentifier())) {
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// throw new InvalidSystemMetadata(1180,
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// "GUID in method call does not match GUID in system metadata.");
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// }
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logMetacat.debug("Checking if identifier exists...");
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// Check that the identifier does not already exist
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IdentifierManager im = IdentifierManager.getInstance();
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if (im.identifierExists(guid.getValue())) {
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throw new IdentifierNotUnique(1120,
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"GUID is already in use by an existing object.");
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}
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// generate guid/localId pair for object
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logMetacat.debug("Generating a guid/localId mapping");
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String localId = im.generateLocalId(guid.getValue(), 1);
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// TODO: generate guid/localId pair for sysmeta
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// TODO: update system metadata fields
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// TODO: insert system metadata to metacat (probably at end)
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// TODO: Check if we are handling metadata or data
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// TODO: CASE METADATA:
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// Setup and call handleInsertOrUpdate()
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// TODO: DEFAULT CASE: DATA
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try {
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logMetacat.debug("Case DATA: starting to write to disk.");
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if (DocumentImpl.getDataFileLockGrant(localId)) {
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// Save the data file to disk using "localId" as the name
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try {
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String datafilepath = PropertyService.getProperty("application.datafilepath");
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File dataDirectory = new File(datafilepath);
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dataDirectory.mkdirs();
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File newFile = writeStreamToFile(dataDirectory, localId, object);
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// TODO: Check that the file size matches SystemMetadata
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// long size = newFile.length();
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// if (size == 0) {
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// throw new IOException("Uploaded file is 0 bytes!");
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// }
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//register the file in the database (which generates an exception
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// if the docid is not acceptable or other untoward things happen
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try {
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logMetacat.debug("Registering document...");
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DocumentImpl.registerDocument(localId, "BIN", localId,
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username, groups);
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logMetacat.debug("Registrtion step completed.");
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} catch (SQLException e) {
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//newFile.delete();
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logMetacat.debug("SQLE: " + e.getMessage());
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e.printStackTrace(System.out);
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throw new ServiceFailure(1190, "Registration failed: " + e.getMessage());
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} catch (AccessionNumberException e) {
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//newFile.delete();
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logMetacat.debug("ANE: " + e.getMessage());
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e.printStackTrace(System.out);
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throw new ServiceFailure(1190, "Registration failed: " + e.getMessage());
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} catch (Exception e) {
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//newFile.delete();
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logMetacat.debug("Exception: " + e.getMessage());
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e.printStackTrace(System.out);
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throw new ServiceFailure(1190, "Registration failed: " + e.getMessage());
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}
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258 |
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logMetacat.debug("Logging the creation event.");
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EventLog.getInstance().log(request.getRemoteAddr(),
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username, localId, "create");
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262 |
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263 |
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// Force replication this data file
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// To data file, "insert" and update is same
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// The fourth parameter is null. Because it is notification
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// server and this method is in MetaCatServerlet. It is
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// original command, not get force replication info from
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// another metacat
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// TODO: note that GUID mapping is not being replicated
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logMetacat.debug("Scheduling replication.");
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ForceReplicationHandler frh = new ForceReplicationHandler(
|
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localId, "insert", false, null);
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273 |
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274 |
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} catch (PropertyNotFoundException e) {
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275 |
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throw new ServiceFailure(1190, "Could not lock file for writing:" + e.getMessage());
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276 |
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}
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277 |
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278 |
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}
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279 |
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} catch (Exception e) {
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280 |
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// Could not get a lock on the document, so we can not update the file now
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281 |
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throw new ServiceFailure(1190, "Failed to lock file: " + e.getMessage());
|
282 |
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}
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283 |
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284 |
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logMetacat.debug("Returning from CrudService.create()");
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285 |
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return guid;
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5298
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}
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287 |
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288 |
5320
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public Identifier delete(AuthToken token, Identifier guid)
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289 |
5298
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|
throws InvalidToken, ServiceFailure, NotAuthorized, NotFound,
|
290 |
|
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NotImplemented {
|
291 |
|
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throw new NotImplemented(1000, "This method not yet implemented.");
|
292 |
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}
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293 |
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|
294 |
5320
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public DescribeResponse describe(AuthToken token, Identifier guid)
|
295 |
5298
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jones
|
throws InvalidToken, ServiceFailure, NotAuthorized, NotFound,
|
296 |
|
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NotImplemented {
|
297 |
|
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throw new NotImplemented(1000, "This method not yet implemented.");
|
298 |
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}
|
299 |
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|
300 |
5320
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public InputStream get(AuthToken token, Identifier guid)
|
301 |
5298
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|
throws InvalidToken, ServiceFailure, NotAuthorized, NotFound,
|
302 |
|
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NotImplemented {
|
303 |
|
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|
304 |
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// Retrieve the session information from the AuthToken
|
305 |
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// If the session is expired, then the user is 'public'
|
306 |
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final SessionData sessionData = getSessionData(token);
|
307 |
|
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|
308 |
|
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// Look up the localId for this global identifier
|
309 |
|
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IdentifierManager im = IdentifierManager.getInstance();
|
310 |
|
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try {
|
311 |
5320
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|
final String localId = im.getLocalId(guid.getValue());
|
312 |
5298
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|
313 |
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final InputStreamFromOutputStream<String> objectStream =
|
314 |
|
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new InputStreamFromOutputStream<String>() {
|
315 |
|
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|
316 |
|
|
@Override
|
317 |
|
|
public String produce(final OutputStream dataSink) throws Exception {
|
318 |
|
|
|
319 |
|
|
try {
|
320 |
|
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handler.readFromMetacat(request.getRemoteAddr(), null,
|
321 |
|
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dataSink, localId, "xml",
|
322 |
|
|
sessionData.getUserName(),
|
323 |
|
|
sessionData.getGroupNames(), true, params);
|
324 |
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|
} catch (PropertyNotFoundException e) {
|
325 |
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throw new ServiceFailure(1030, e.getMessage());
|
326 |
|
|
} catch (ClassNotFoundException e) {
|
327 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
328 |
|
|
} catch (IOException e) {
|
329 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
330 |
|
|
} catch (SQLException e) {
|
331 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
332 |
|
|
} catch (McdbException e) {
|
333 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
334 |
|
|
} catch (ParseLSIDException e) {
|
335 |
|
|
throw new NotFound(1020, e.getMessage());
|
336 |
|
|
} catch (InsufficientKarmaException e) {
|
337 |
|
|
throw new NotAuthorized(1000, "Not authorized for get().");
|
338 |
|
|
}
|
339 |
|
|
|
340 |
|
|
return "Completed";
|
341 |
|
|
}
|
342 |
|
|
};
|
343 |
|
|
return objectStream;
|
344 |
|
|
|
345 |
|
|
} catch (McdbDocNotFoundException e) {
|
346 |
|
|
throw new NotFound(1020, e.getMessage());
|
347 |
|
|
}
|
348 |
|
|
|
349 |
|
|
/*
|
350 |
|
|
* Alternative approach that uses Piped streams, but requires thread handling
|
351 |
|
|
* which makes exception handling difficult (because exceptions fall off the
|
352 |
|
|
* calling thread, terminating the thread.
|
353 |
|
|
*
|
354 |
|
|
// Look up the localId for this global identifier
|
355 |
|
|
IdentifierManager im = IdentifierManager.getInstance();
|
356 |
|
|
try {
|
357 |
|
|
final String localId = im.getLocalId(guid.getIdentifier());
|
358 |
|
|
|
359 |
|
|
// Now use that localId to read the object and return it
|
360 |
|
|
params.put("docid", new String[] { localId });
|
361 |
|
|
final PipedInputStream in = new PipedInputStream();
|
362 |
|
|
new Thread(
|
363 |
|
|
new Runnable() {
|
364 |
|
|
public void run() {
|
365 |
|
|
try {
|
366 |
|
|
PipedOutputStream out = new PipedOutputStream(in);
|
367 |
|
|
handler.readFromMetacat(request.getRemoteAddr(), null,
|
368 |
|
|
out, localId, "xml",
|
369 |
|
|
username, groupNames, true, params);
|
370 |
|
|
} catch (PropertyNotFoundException e) {
|
371 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
372 |
|
|
} catch (ClassNotFoundException e) {
|
373 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
374 |
|
|
} catch (IOException e) {
|
375 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
376 |
|
|
} catch (SQLException e) {
|
377 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
378 |
|
|
} catch (McdbException e) {
|
379 |
|
|
throw new ServiceFailure(1030, e.getMessage());
|
380 |
|
|
} catch (ParseLSIDException e) {
|
381 |
|
|
throw new NotFound(1020, e.getMessage());
|
382 |
|
|
} catch (InsufficientKarmaException e) {
|
383 |
|
|
throw new NotAuthorized(1000, "Not authorized for get().");
|
384 |
|
|
}
|
385 |
|
|
}
|
386 |
|
|
}
|
387 |
|
|
).start();
|
388 |
|
|
return in;
|
389 |
|
|
} catch (McdbDocNotFoundException e) {
|
390 |
|
|
throw new NotFound(1020, e.getMessage());
|
391 |
|
|
}
|
392 |
|
|
*/
|
393 |
|
|
}
|
394 |
|
|
|
395 |
5320
|
jones
|
public Checksum getChecksum(AuthToken token, Identifier guid)
|
396 |
5298
|
jones
|
throws InvalidToken, ServiceFailure, NotAuthorized, NotFound,
|
397 |
|
|
InvalidRequest, NotImplemented {
|
398 |
|
|
throw new NotImplemented(1000, "This method not yet implemented.");
|
399 |
|
|
}
|
400 |
|
|
|
401 |
5320
|
jones
|
public Checksum getChecksum(AuthToken token, Identifier guid,
|
402 |
5298
|
jones
|
String checksumAlgorithm) throws InvalidToken, ServiceFailure,
|
403 |
|
|
NotAuthorized, NotFound, InvalidRequest, NotImplemented {
|
404 |
|
|
throw new NotImplemented(1000, "This method not yet implemented.");
|
405 |
|
|
}
|
406 |
|
|
|
407 |
|
|
public LogRecordSet getLogRecords(AuthToken token, Date fromDate, Date toDate)
|
408 |
|
|
throws InvalidToken, ServiceFailure, NotAuthorized, InvalidRequest,
|
409 |
|
|
NotImplemented {
|
410 |
|
|
throw new NotImplemented(1000, "This method not yet implemented.");
|
411 |
|
|
}
|
412 |
|
|
|
413 |
5320
|
jones
|
public SystemMetadata getSystemMetadata(AuthToken token, Identifier guid)
|
414 |
5298
|
jones
|
throws InvalidToken, ServiceFailure, NotAuthorized, NotFound,
|
415 |
|
|
InvalidRequest, NotImplemented {
|
416 |
5319
|
jones
|
|
417 |
|
|
// Look up ID of system metadata based on guid
|
418 |
|
|
// Initially from document, later from entry in table?
|
419 |
|
|
|
420 |
|
|
// Read system metadata from disk and create SystemMetadata object
|
421 |
|
|
// Follows same implementation plan as get()
|
422 |
|
|
|
423 |
|
|
// return it
|
424 |
5298
|
jones
|
throw new NotImplemented(1000, "This method not yet implemented.");
|
425 |
|
|
}
|
426 |
|
|
|
427 |
5320
|
jones
|
public Identifier update(AuthToken token, Identifier guid,
|
428 |
|
|
InputStream object, Identifier obsoletedGuid, SystemMetadata sysmeta)
|
429 |
5298
|
jones
|
throws InvalidToken, ServiceFailure, NotAuthorized, IdentifierNotUnique,
|
430 |
|
|
UnsupportedType, InsufficientResources, NotFound, InvalidSystemMetadata,
|
431 |
|
|
NotImplemented {
|
432 |
|
|
throw new NotImplemented(1000, "This method not yet implemented.");
|
433 |
|
|
}
|
434 |
|
|
|
435 |
5319
|
jones
|
private File writeStreamToFile(File dir, String fileName, InputStream data)
|
436 |
|
|
throws ServiceFailure {
|
437 |
|
|
// logMetacat.debug("***********************************************");
|
438 |
|
|
// logMetacat.debug("** FILE TEST FROM CS **");
|
439 |
|
|
// logMetacat.debug("***********************************************");
|
440 |
|
|
|
441 |
|
|
File newFile = new File(dir, fileName);
|
442 |
|
|
logMetacat.debug("Filename for write is: " + newFile.getAbsolutePath());
|
443 |
|
|
|
444 |
|
|
try {
|
445 |
|
|
if (newFile.createNewFile()) {
|
446 |
|
|
// logMetacat.debug("File doesn't yet exist, so write to it.");
|
447 |
|
|
// logMetacat.debug("Creating file stream...");
|
448 |
|
|
|
449 |
|
|
// write data stream to desired file
|
450 |
|
|
OutputStream os = new FileOutputStream(newFile);
|
451 |
|
|
// logMetacat.debug("Copying file stream...");
|
452 |
|
|
long length = IOUtils.copyLarge(data, os);
|
453 |
|
|
os.flush();
|
454 |
|
|
// logMetacat.debug("Closing file stream...");
|
455 |
|
|
os.close();
|
456 |
|
|
// logMetacat.debug("Done with file stream...");
|
457 |
|
|
} else {
|
458 |
|
|
logMetacat.debug("File creation failed, or file already exists.");
|
459 |
|
|
throw new ServiceFailure(1190, "File already exists: " + fileName);
|
460 |
|
|
}
|
461 |
|
|
} catch (FileNotFoundException e) {
|
462 |
|
|
logMetacat.debug("FNF: " + e.getMessage());
|
463 |
|
|
throw new ServiceFailure(1190, "File not found: " + fileName + " "
|
464 |
|
|
+ e.getMessage());
|
465 |
|
|
} catch (IOException e) {
|
466 |
|
|
logMetacat.debug("IOE: " + e.getMessage());
|
467 |
|
|
throw new ServiceFailure(1190, "File was not written: " + fileName
|
468 |
|
|
+ " " + e.getMessage());
|
469 |
|
|
}
|
470 |
|
|
|
471 |
|
|
// logMetacat.debug("***********************************************");
|
472 |
|
|
// logMetacat.debug("** END FILE TEST **");
|
473 |
|
|
// logMetacat.debug("***********************************************");
|
474 |
|
|
|
475 |
|
|
return newFile;
|
476 |
|
|
}
|
477 |
5298
|
jones
|
}
|