bundles/org.simantics.db.services/src/org/simantics/db/services/GlobalServiceInitializer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.services;
  13
  14 import org.eclipse.core.runtime.CoreException;
  15 import org.eclipse.core.runtime.IConfigurationElement;
  16 import org.eclipse.core.runtime.IExtensionPoint;
  17 import org.eclipse.core.runtime.IExtensionRegistry;
  18 import org.eclipse.core.runtime.IStatus;
  19 import org.eclipse.core.runtime.MultiStatus;
  20 import org.eclipse.core.runtime.Platform;
  21 import org.eclipse.core.runtime.Status;
  22 import org.simantics.db.Session;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 /**
  27  * @author Tuukka Lehtonen
  28  */
  29 public class GlobalServiceInitializer implements ServiceInitializer {
  30
  31     private static final Logger LOGGER = LoggerFactory.getLogger(GlobalServiceInitializer.class);
  32
  33     private static final String PLUGIN_ID           = "org.simantics.db.services";
  34
  35     private static final String SERVICE_INITIALIZER = "serviceInitializer";
  36
  37     public static final int     INITIALIZER_ERROR   = 1;
  38
  39     @Override
  40     public IStatus initialize(final Session s) {
  41         MultiStatus problems = new MultiStatus(PLUGIN_ID, INITIALIZER_ERROR, "ServiceInitializer errors:", null);
  42
  43         LOGGER.info("Initializing..");
  44         // Initialize adaption service
  45         merge(problems, new AdaptionServiceInitializer().initialize(s));
  46
  47         //s.registerService(StructuralResourceListener.class, new StructuralResourceListenerImpl(s));
  48
  49         // Find extensions if any are available
  50         IExtensionRegistry er = Platform.getExtensionRegistry();
  51         if (er != null) {
  52             IExtensionPoint ep = er.getExtensionPoint(PLUGIN_ID, SERVICE_INITIALIZER);
  53             if (ep != null) {
  54                 for (IConfigurationElement conf : ep.getConfigurationElements()) {
  55                     try {
  56                         LOGGER.info("initialize: " + conf.getAttribute("class") + " (id=" + conf.getAttribute("id") + ")");
  57                         ServiceInitializer initializer = (ServiceInitializer) conf.createExecutableExtension("class");
  58                         merge(problems, initializer.initialize(s));
  59                     } catch (CoreException e) {
  60                         IStatus status = new Status(IStatus.ERROR, conf.getDeclaringExtension().getNamespaceIdentifier(), "ServiceInitializer instantiation failed, see exception for details.", e);
  61                         problems.merge(status);
  62                     }
  63                 }
  64             }
  65         }
  66         if (problems.isOK())
  67             return Status.OK_STATUS;
  68         return problems;
  69     }
  70
  71     public IStatus initialize(Session s, String initializerId) {
  72         if (initializerId == null)
  73             throw new IllegalArgumentException("null initializer id");
  74
  75         // Find the matching service initializer extension
  76         for (IConfigurationElement conf : Platform.getExtensionRegistry().getExtensionPoint(PLUGIN_ID, SERVICE_INITIALIZER).getConfigurationElements()) {
  77             try {
  78                 String id = conf.getAttribute("id");
  79                 if (initializerId.equals(id)) {
  80 //                    System.out.println("initialize: " + conf.getAttribute("class"));
  81                     ServiceInitializer initializer = (ServiceInitializer) conf.createExecutableExtension("class");
  82                     return initializer.initialize(s);
  83                 }
  84             } catch (CoreException e) {
  85                 return new Status(IStatus.ERROR, conf.getDeclaringExtension().getNamespaceIdentifier(), "ServiceInitializer instantiation failed, see exception for details.", e);
  86             }
  87         }
  88         return new Status(IStatus.ERROR, PLUGIN_ID, "ServiceInitializer extension with id '" + initializerId + "' not found.", null);
  89     }
  90
  91     private void merge(MultiStatus result, IStatus status) {
  92         if (!status.isOK())
  93             result.add(status);
  94     }
  95
  96 }