eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/store/CdmStoreConnector.java

   1 // $Id$
   2 /**
   3  * Copyright (C) 2007 EDIT
   4  * European Distributed Institute of Taxonomy
   5  * http://www.e-taxonomy.eu
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version 1.1
   8  * See LICENSE.TXT at the top of this package for the full license terms.
   9  */
  10
  11 package eu.etaxonomy.taxeditor.store;
  12
  13 import java.sql.SQLException;
  14 import java.util.concurrent.CancellationException;
  15
  16 import org.eclipse.core.runtime.IProgressMonitor;
  17 import org.eclipse.core.runtime.IStatus;
  18 import org.eclipse.core.runtime.Status;
  19 import org.eclipse.core.runtime.jobs.Job;
  20 import org.eclipse.swt.widgets.Display;
  21 import org.springframework.core.io.Resource;
  22
  23 import eu.etaxonomy.cdm.api.application.CdmApplicationController;
  24 import eu.etaxonomy.cdm.api.application.CdmApplicationRemoteController;
  25 import eu.etaxonomy.cdm.api.application.ICdmApplicationConfiguration;
  26 import eu.etaxonomy.cdm.config.CdmSourceException;
  27 import eu.etaxonomy.cdm.config.ICdmSource;
  28 import eu.etaxonomy.cdm.database.DbSchemaValidation;
  29 import eu.etaxonomy.cdm.database.ICdmDataSource;
  30 import eu.etaxonomy.cdm.model.metadata.CdmMetaData;
  31 import eu.etaxonomy.taxeditor.model.CdmProgressMonitorAdapter;
  32 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  33 import eu.etaxonomy.taxeditor.remoting.source.ICdmRemoteSource;
  34 import eu.etaxonomy.taxeditor.ui.dialog.LoginDialog;
  35 import eu.etaxonomy.taxeditor.view.datasource.CdmDataSourceViewPart;
  36
  37 /**
  38  * @author n.hoffmann
  39  * @created Dec 8, 2010
  40  * @version 1.0
  41  */
  42 class CdmStoreConnector extends Job {
  43         private final Display display;
  44         private final ICdmSource cdmSource;
  45         private DbSchemaValidation dbSchemaValidation;
  46         private final Resource applicationContextBean;
  47
  48         /**
  49          * @param datasource
  50          * @param dbSchemaValidation
  51          * @param applicationContextBean
  52          */
  53         public CdmStoreConnector(Display display, ICdmSource cdmSource,
  54                         DbSchemaValidation dbSchemaValidation,
  55                         Resource applicationContextBean) {
  56                 super("Connecting to datasource: " + cdmSource);
  57                 this.display = display;
  58                 this.cdmSource = cdmSource;
  59                 this.dbSchemaValidation = dbSchemaValidation;
  60                 this.applicationContextBean = applicationContextBean;
  61         }
  62
  63         @Override
  64         public IStatus run(final IProgressMonitor monitor) {
  65
  66                 monitor.beginTask(getConnectionMessage(), 10);
  67
  68                 // check if database is up and running
  69                 checkDatabaseReachable(monitor);
  70
  71                 if (!monitor.isCanceled()) {
  72                         // check if the datasource actually holds data
  73                         checkIsNonEmptyCdmDatabase(monitor);
  74                 }
  75
  76                 if (dbSchemaValidation != DbSchemaValidation.CREATE
  77                                 && !monitor.isCanceled()) {
  78                         // if we do not create the datasource, we want to check if the
  79                         // datasource is compatible with this editor
  80                         checkDbSchemaVersionCompatibility(monitor);
  81                 }
  82
  83                 // we are done with our low level checking and will free resources now
  84                 cdmSource.closeOpenConnections();
  85
  86                 if (!monitor.isCanceled()) {
  87                         CdmStore.close(monitor);
  88                 }
  89
  90                 ICdmApplicationConfiguration applicationController = null;
  91
  92                 if (!monitor.isCanceled()) {
  93                         CdmProgressMonitorAdapter subprogressMonitor = CdmProgressMonitorAdapter
  94                                         .CreateSubMonitor(monitor, 7);
  95                         // This is where we instantiate the application controller
  96                         try {
  97
  98                                 applicationController = getApplicationController(cdmSource,subprogressMonitor);
  99
 100                         } catch (Exception e) {
 101                                 if(! causeIsCancelationExceptionRecursive(e)){
 102                                         return new Status(IStatus.ERROR, "Could not connect to CDM Store", "An error occurred while trying to connect to datasource: " + cdmSource.getName(), e);
 103                                 }
 104                         } finally {
 105                                 monitor.done();
 106                         }
 107                 }
 108
 109
 110
 111                 if (!monitor.isCanceled()) {
 112                         CdmStore.setInstance(applicationController, cdmSource);
 113
 114                         display.asyncExec(new Runnable() {
 115                                 /*
 116                                  * (non-Javadoc)
 117                                  *
 118                                  * @see java.lang.Runnable#run()
 119                                  */
 120                                 @Override
 121                                 public void run() {
 122                                         authenticate();
 123
 124                                         startContext();
 125                                 }
 126                         });
 127
 128                         MessagingUtils.info("Application context initialized.");
 129                         return Status.OK_STATUS;
 130                 } else {
 131                         // Show datasource view if not shown yet
 132                         display.asyncExec(new Runnable() {
 133                                 /*
 134                                  * (non-Javadoc)
 135                                  *
 136                                  * @see java.lang.Runnable#run()
 137                                  */
 138                                 @Override
 139                                 public void run() {
 140                                         StoreUtil.showView(CdmDataSourceViewPart.ID);
 141                                 }
 142                         });
 143                         return Status.CANCEL_STATUS;
 144                 }
 145
 146         }
 147
 148         private ICdmApplicationConfiguration getApplicationController(ICdmSource cdmSource, CdmProgressMonitorAdapter subprogressMonitor) {
 149                 if(cdmSource instanceof ICdmDataSource) {
 150                         return  CdmApplicationController.NewInstance(applicationContextBean,
 151                                         (ICdmDataSource)cdmSource,
 152                                         dbSchemaValidation,
 153                                         false,
 154                                         subprogressMonitor);
 155                 } else if(cdmSource instanceof ICdmRemoteSource) {
 156                         return CdmApplicationRemoteController.NewInstance((ICdmRemoteSource)cdmSource,
 157                                                         false,
 158                                                         subprogressMonitor,
 159                                                         null);
 160                 } else {
 161                         throw new UnsupportedOperationException("Cannot create application controller for " + cdmSource.getName());
 162                 }
 163         }
 164         private void authenticate() {
 165                 LoginDialog loginDialog = new LoginDialog(StoreUtil.getShell());
 166                 loginDialog.open();
 167         }
 168
 169         private void startContext() {
 170                 CdmStore.getContextManager().notifyContextStart();
 171         }
 172
 173         /**
 174          * @return
 175          */
 176         private String getConnectionMessage() {
 177                 return cdmSource.getConnectionMessage();
 178         }
 179
 180         /**
 181          * @return
 182          * @throws SQLException
 183          */
 184         private void checkDbSchemaVersionCompatibility(IProgressMonitor monitor) {
 185                 monitor.subTask("Checking if datasource is compatible with this editor.");
 186                 String dbSchemaVersion;
 187                 boolean result = false;
 188                 try {
 189                         dbSchemaVersion = cdmSource.getDbSchemaVersion();
 190                         // we assume that empty dbSchemaVersion means an empty database and
 191                         // skip version checking
 192                         result = dbSchemaVersion == null ? true : CdmMetaData
 193                                         .isDbSchemaVersionCompatible(dbSchemaVersion);
 194                         monitor.worked(1);
 195                 } catch (CdmSourceException e) {
 196                         //
 197                 }
 198
 199                 if (!result) {
 200                         // Show an error message
 201                         MessagingUtils
 202                                         .messageDialog(
 203                                                         "DatabaseCompatibilityCheck failed",
 204                                                         this,
 205                                                         "The database schema for the chosen "
 206                                                                         + "datasource '"
 207                                                                         + cdmSource
 208                                                                         + "' \n is not valid for this version of the taxonomic editor. \n"
 209                                                                         + "Please update the chosen datasource or choose a new data source to connect to in the Datasource View.",
 210                                                         null);
 211
 212                         monitor.setCanceled(true);
 213                 }
 214
 215         }
 216
 217         private void checkIsNonEmptyCdmDatabase(IProgressMonitor monitor) {
 218                 monitor.subTask("Checking if datasource is a non empty CDM database.");
 219                 boolean isDbEmpty = false;
 220                 try {
 221                         isDbEmpty = cdmSource.isDbEmpty();
 222                 } catch (CdmSourceException e) {
 223                         isDbEmpty = true;
 224                 }
 225                 if(isDbEmpty) {
 226                         dbSchemaValidation = DbSchemaValidation.CREATE;
 227                 }
 228         }
 229
 230         private boolean causeIsCancelationExceptionRecursive(Throwable throwable){
 231                 if(throwable == null){
 232                         return false;
 233                 }else if(throwable instanceof CancellationException){
 234                         return true;
 235                 }else{
 236                         return causeIsCancelationExceptionRecursive(throwable.getCause());
 237                 }
 238         }
 239
 240         private void checkDatabaseReachable(IProgressMonitor monitor) {
 241                 try {
 242                         monitor.subTask("Checking if datasource is reachable.");
 243                         cdmSource.checkConnection();
 244                         monitor.worked(1);
 245                 } catch (CdmSourceException e) {
 246                         MessagingUtils.messageDialog("Could not connect to chosen datasource",
 247                                         this, "Reason: " + e.getMessage(), e);
 248                         monitor.setCanceled(true);
 249                 }
 250         }
 251 }