--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.common;
+
+import java.util.concurrent.TimeUnit;
+
+import org.simantics.db.Session;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.management.ISessionContext;
+import org.simantics.db.management.ISessionContextProvider;
+import org.simantics.db.management.ISessionContextProviderSource;
+import org.simantics.db.request.ReadInterface;
+import org.simantics.db.request.WriteInterface;
+import org.simantics.layer0.Layer0;
+import org.simantics.operation.Layer0X;
+import org.simantics.utils.threads.ThreadUtils;
+
+/**
+ * An internal facade for accessing basic Simantics platform services.
+ * Usable without a graphical UI, i.e. in headless contexts.
+ *
+ * Use org.simantics.Simantics instead where ever possible.
+ */
+public class SimanticsInternal {
+
+ private static ISessionContextProviderSource providerSource = null;
+
+ /**
+ * Queue execution of a runnable.
+ *
+ * @param runnable
+ */
+ public static void async(Runnable runnable) {
+ ThreadUtils.getBlockingWorkExecutor().execute(runnable);
+ }
+
+ public static void async(Runnable runnable, int delay, TimeUnit unit) {
+ ThreadUtils.getTimer().schedule(runnable, delay, unit);
+ }
+
+ /**
+ * Queue execution of a non-blocking runnable. Use this method with caution.
+ * A non-blocking runnable nevers locks anything, No Locks, No semaphores,
+ * No Object.wait(), No synchronized() {} blocks.
+ *
+ * @param runnable a non-blocking runnable
+ */
+ public static void asyncNonblocking(Runnable runnable) {
+ ThreadUtils.getNonBlockingWorkExecutor().execute(runnable);
+ }
+
+ /**
+ * Schedule execution of a non-blocking runnable. Use this method with caution.
+ * A non-blocking runnable never locks anything, No Locks, No semaphores,
+ * No Object,wait(), No synchronized() {} blocks.
+ *
+ * @param runnable a non-blocking runnable
+ * @param initialDelay
+ * @param period
+ */
+ public static void asyncNonblocking(Runnable runnable, int initialDelay, int period) {
+ ThreadUtils.getNonBlockingWorkExecutor().scheduleAtFixedRate(runnable, initialDelay, period, TimeUnit.MILLISECONDS);
+ }
+
+ public static synchronized ISessionContext setSessionContext(ISessionContext ctx) {
+ return getSessionContextProvider().setSessionContext(ctx);
+ }
+
+ public static void setSessionContextProviderSource(ISessionContextProviderSource source) {
+ if (source == null)
+ throw new IllegalArgumentException("null provider source");
+ providerSource = source;
+ }
+
+ public static ISessionContextProviderSource getProviderSource() {
+ if (providerSource == null)
+ throw new IllegalStateException(
+ "providerSource must be initialized by the application before using class Simantics");
+ return providerSource;
+ }
+
+ public static ISessionContextProvider getSessionContextProvider() {
+ return getProviderSource().getActive();
+ }
+
+ /**
+ * Returns the database session context associated with the currently active
+ * context. This method should be used to retrieve session contexts only
+ * when the client is sure that the correct context is active.
+ *
+ * @return the session context associated with the currently active context
+ * or <code>null</code> if the context has no session context
+ */
+ public static ISessionContext getSessionContext() {
+ ISessionContextProvider provider = getSessionContextProvider();
+ return provider != null ? provider.getSessionContext() : null;
+ }
+
+ /**
+ * Returns the database Session bound to the currently active context.
+ *
+ * <p>
+ * The method always returns a non-null Session or produces an
+ * IllegalStateException if a Session was not attainable.
+ * </p>
+ *
+ * @return the Session bound to the currently active workbench window
+ * @throws IllegalStateException if no Session was available
+ */
+ public static Session getSession() {
+ ISessionContext ctx = getSessionContext();
+ if (ctx == null)
+ throw new IllegalStateException("Session unavailable, no database session open");
+ return ctx.getSession();
+ }
+
+ /**
+ * Returns the database Session bound to the currently active context.
+ * Differently from {@link #getSession()}, this method returns
+ * <code>null</code> if there is no current Session available.
+ *
+ * @see #getSession()
+ * @return the Session bound to the currently active context or
+ * <code>null</code>
+ */
+ public static Session peekSession() {
+ ISessionContext ctx = getSessionContext();
+ return ctx == null ? null : ctx.peekSession();
+ }
+
+ public static Layer0 getLayer0() throws DatabaseException {
+ return Layer0.getInstance(getSession());
+ }
+
+ public static Layer0X getLayer0X() throws DatabaseException {
+ return Layer0X.getInstance(getSession());
+ }
+
+
+ public static <T> T sync(ReadInterface<T> r) throws DatabaseException {
+ return getSession().sync(r);
+ }
+
+ public static <T> T sync(WriteInterface<T> r) throws DatabaseException {
+ return getSession().sync(r);
+ }
+
+}
Code Review / simantics / platform.git / blobdiff