--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2016 Association for Decentralized Information Management in\r
+ * Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * Semantum Oy - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.db.indexing.internal;\r
+\r
+import java.util.concurrent.Semaphore;\r
+\r
+import org.eclipse.core.runtime.IProgressMonitor;\r
+import org.eclipse.core.runtime.IStatus;\r
+import org.eclipse.core.runtime.jobs.Job;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.function.DbConsumer;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ * @since 1.22.2, 1.25.0\r
+ */\r
+public abstract class IndexingJob extends Job {\r
+\r
+ /**\r
+ * NOTE: this is intentionally the same as\r
+ * <code>org.simantics.DatabaseJob.DATABASE_JOB_FAMILY</code> in order for\r
+ * this job to cause the same UI-behavior as DatabaseJob.\r
+ */\r
+ private static final String DATABASE_JOB_FAMILY = "org.simantics.db.inDatabaseJob";\r
+\r
+ public IndexingJob(String name) {\r
+ super(name);\r
+ }\r
+\r
+ @Override\r
+ public boolean belongsTo(Object family) {\r
+ return DATABASE_JOB_FAMILY.equals(family);\r
+ }\r
+\r
+ /**\r
+ * @param monitor\r
+ * @param jobName\r
+ * @param consumer\r
+ * @throws DatabaseException\r
+ */\r
+ public static void jobifyIfPossible(\r
+ IProgressMonitor monitor,\r
+ String jobName,\r
+ DbConsumer<IProgressMonitor> consumer)\r
+ throws DatabaseException\r
+ {\r
+ // Prevent deadlocks by checking preconditions for using a job.\r
+ // JobManager is suspended e.g. during workbench startup.\r
+ if (Job.getJobManager().isSuspended() || Job.getJobManager().currentJob() != null) {\r
+ consumer.accept(monitor);\r
+ return;\r
+ }\r
+\r
+ Semaphore barrier = new Semaphore(0);\r
+ Throwable[] err = { null };\r
+ IndexingJob job = new IndexingJob(jobName) {\r
+ @Override\r
+ protected IStatus run(IProgressMonitor monitor) {\r
+ try {\r
+ consumer.accept(monitor);\r
+ } catch (Throwable t) {\r
+ err[0] = t;\r
+ } finally {\r
+ monitor.done();\r
+ barrier.release();\r
+ }\r
+ return org.eclipse.core.runtime.Status.OK_STATUS;\r
+ }\r
+ };\r
+ job.schedule();\r
+ try {\r
+ barrier.acquire();\r
+ if (err[0] != null) {\r
+ if (err[0] instanceof DatabaseException)\r
+ throw (DatabaseException) err[0];\r
+ throw new DatabaseException(err[0]);\r
+ }\r
+ } catch (InterruptedException e) {\r
+ throw new DatabaseException(e);\r
+ }\r
+ }\r
+\r
+}\r