X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Finternal%2FSimanticsInternal.java;fp=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Finternal%2FSimanticsInternal.java;h=ce4fd23d9bb4436c4e563a3e9e4333e14fd7fc85;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/internal/SimanticsInternal.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/internal/SimanticsInternal.java
new file mode 100644
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+/*******************************************************************************
+ * 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.layer0.internal;
+
+import java.io.File;
+import java.util.concurrent.TimeUnit;
+
+import org.eclipse.core.runtime.Platform;
+import org.simantics.db.Resource;
+import org.simantics.db.Session;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.util.SimanticsClipboard;
+import org.simantics.db.layer0.util.SimanticsKeys;
+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();
+    }
+
+    /**
+     * @return the currently open and active project as an IProject
+     * @throws IllegalStateException if there is no currently active database
+     *         session, which also means there is no active project at the
+     *         moment
+     */
+    public static Resource getProject() {
+        ISessionContext ctx = getSessionContext();
+        if (ctx == null)
+            throw new IllegalStateException("No current database session");
+        return ctx.getHint(SimanticsKeys.KEY_PROJECT);
+    }
+
+    /**
+     * @return the currently open and active project as an IProject or null if
+     *         there is either no project or no active database session
+     */
+    public static Resource peekProject() {
+        ISessionContext ctx = getSessionContext();
+        return ctx != null ? (Resource) ctx.getHint(SimanticsKeys.KEY_PROJECT) : null;
+    }
+
+    private static SimanticsClipboard clipboard = SimanticsClipboard.EMPTY;
+
+    /**
+     * @param content
+     */
+    public static void setClipboard(SimanticsClipboard content) {
+        if (content == null)
+            throw new NullPointerException("null clipboard content");
+        clipboard = content;
+    }
+
+    public static SimanticsClipboard getClipboard() {
+        return clipboard;
+    }
+
+    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);
+    }
+    
+    public static File getTemporaryDirectory() {
+        File workspace = Platform.getLocation().toFile();
+        File temp = new File(workspace, "tempFiles");
+        temp.mkdirs();
+        return temp;
+    }
+    
+}