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                         int oldPriority = Thread.currentThread().getPriority();
  97                         try {
  98                                 Thread.currentThread().setPriority(10);
  99                                 applicationController = getApplicationController(cdmSource,subprogressMonitor);
 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                                 Thread.currentThread().setPriority(oldPriority);
 107                         }
 108                 }
 109
 110
 111
 112                 if (!monitor.isCanceled()) {
 113                         CdmStore.setInstance(applicationController, cdmSource);
 114
 115                         display.asyncExec(new Runnable() {
 116                                 /*
 117                                  * (non-Javadoc)
 118                                  *
 119                                  * @see java.lang.Runnable#run()
 120                                  */
 121                                 @Override
 122                                 public void run() {
 123                                         authenticate();
 124
 125                                         startContext();
 126                                 }
 127                         });
 128
 129                         MessagingUtils.info("Application context initialized.");
 130                         return Status.OK_STATUS;
 131                 } else {
 132                         // Show datasource view if not shown yet
 133                         display.asyncExec(new Runnable() {
 134                                 /*
 135                                  * (non-Javadoc)
 136                                  *
 137                                  * @see java.lang.Runnable#run()
 138                                  */
 139                                 @Override
 140                                 public void run() {
 141                                         StoreUtil.showView(CdmDataSourceViewPart.ID);
 142                                 }
 143                         });
 144                         return Status.CANCEL_STATUS;
 145                 }
 146
 147         }
 148
 149         private ICdmApplicationConfiguration getApplicationController(ICdmSource cdmSource, CdmProgressMonitorAdapter subprogressMonitor) {
 150                 if(cdmSource instanceof ICdmDataSource) {
 151                         return  CdmApplicationController.NewInstance(applicationContextBean,
 152                                         (ICdmDataSource)cdmSource,
 153                                         dbSchemaValidation,
 154                                         false,
 155                                         subprogressMonitor);
 156                 } else if(cdmSource instanceof ICdmRemoteSource) {
 157                         return CdmApplicationRemoteController.NewInstance((ICdmRemoteSource)cdmSource,
 158                                                         false,
 159                                                         subprogressMonitor,
 160                                                         null);
 161                 } else {
 162                         throw new UnsupportedOperationException("Cannot create application controller for " + cdmSource.getName());
 163                 }
 164         }
 165         private void authenticate() {
 166                 LoginDialog loginDialog = new LoginDialog(StoreUtil.getShell());
 167                 loginDialog.open();
 168         }
 169
 170         private void startContext() {
 171                 CdmStore.getContextManager().notifyContextStart();
 172         }
 173
 174         /**
 175          * @return
 176          */
 177         private String getConnectionMessage() {
 178                 return cdmSource.getConnectionMessage();
 179         }
 180
 181         /**
 182          * @return
 183          * @throws SQLException
 184          */
 185         private void checkDbSchemaVersionCompatibility(IProgressMonitor monitor) {
 186                 monitor.subTask("Checking if datasource is compatible with this editor.");
 187                 String dbSchemaVersion;
 188                 boolean result = false;
 189                 try {
 190                         dbSchemaVersion = cdmSource.getDbSchemaVersion();
 191                         // we assume that empty dbSchemaVersion means an empty database and
 192                         // skip version checking
 193                         result = dbSchemaVersion == null ? true : CdmMetaData
 194                                         .isDbSchemaVersionCompatible(dbSchemaVersion);
 195                         monitor.worked(1);
 196                 } catch (CdmSourceException e) {
 197                         //
 198                 }
 199
 200                 if (!result) {
 201                         // Show an error message
 202                         MessagingUtils
 203                                         .messageDialog(
 204                                                         "DatabaseCompatibilityCheck failed",
 205                                                         this,
 206                                                         "The database schema for the chosen "
 207                                                                         + "datasource '"
 208                                                                         + cdmSource
 209                                                                         + "' \n is not valid for this version of the taxonomic editor. \n"
 210                                                                         + "Please update the chosen datasource or choose a new data source to connect to in the Datasource View.",
 211                                                         null);
 212
 213                         monitor.setCanceled(true);
 214                 }
 215
 216         }
 217
 218         private void checkIsNonEmptyCdmDatabase(IProgressMonitor monitor) {
 219                 monitor.subTask("Checking if datasource is a non empty CDM database.");
 220                 boolean isDbEmpty = false;
 221                 try {
 222                         isDbEmpty = cdmSource.isDbEmpty();
 223                 } catch (CdmSourceException e) {
 224                         isDbEmpty = true;
 225                 }
 226                 if(isDbEmpty) {
 227                         dbSchemaValidation = DbSchemaValidation.CREATE;
 228                 }
 229         }
 230
 231         private boolean causeIsCancelationExceptionRecursive(Throwable throwable){
 232                 if(throwable == null){
 233                         return false;
 234                 }else if(throwable instanceof CancellationException){
 235                         return true;
 236                 }else{
 237                         return causeIsCancelationExceptionRecursive(throwable.getCause());
 238                 }
 239         }
 240
 241         private void checkDatabaseReachable(IProgressMonitor monitor) {
 242                 try {
 243                         monitor.subTask("Checking if datasource is reachable.");
 244                         cdmSource.checkConnection();
 245                         monitor.worked(1);
 246                 } catch (CdmSourceException e) {
 247                         MessagingUtils.messageDialog("Could not connect to chosen datasource",
 248                                         this, "Reason: " + e.getMessage(), e);
 249                         monitor.setCanceled(true);
 250                 }
 251         }
 252 }