X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;ds=sidebyside;f=bundles%2Forg.simantics.modeling%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Fsubscription%2FVariableSetListener.java;fp=bundles%2Forg.simantics.modeling%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Fsubscription%2FVariableSetListener.java;h=4af644c084233ea64e5f1d1f4fcde5b80eb635fc;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.modeling/src/org/simantics/modeling/subscription/VariableSetListener.java b/bundles/org.simantics.modeling/src/org/simantics/modeling/subscription/VariableSetListener.java
new file mode 100644
index 000000000..4af644c08
--- /dev/null
+++ b/bundles/org.simantics.modeling/src/org/simantics/modeling/subscription/VariableSetListener.java
@@ -0,0 +1,104 @@
+package org.simantics.modeling.subscription;
+
+import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.logging.Level;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.jobs.Job;
+import org.simantics.ObjectIdentitySchedulingRule;
+import org.simantics.db.common.procedure.adapter.ListenerAdapter;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.history.HistoryException;
+import org.simantics.history.util.subscription.SubscriptionItem;
+import org.simantics.modeling.subscription.ModelHistoryCollector.ItemCollector;
+
+/**
+ * Listener for {@link SubscriptionCollectionResult} request. Reloads
+ * {@link ItemCollector} on every execution.
+ */
+class VariableSetListener extends ListenerAdapter<SubscriptionCollectionResult> {
+    /**
+	 * 
+	 */
+	private final ModelHistoryCollector modelHistoryCollector;
+
+	/**
+	 * @param modelHistoryCollector
+	 */
+	VariableSetListener(ModelHistoryCollector modelHistoryCollector) {
+		this.modelHistoryCollector = modelHistoryCollector;
+	}
+
+	boolean disposed;
+
+    @Override
+    public void execute(final SubscriptionCollectionResult result) {
+        Job job = new Job("Reloading history subscriptions") {
+            @Override
+            protected IStatus run(IProgressMonitor monitor) {
+                try {
+                    if (VariableSetListener.this.modelHistoryCollector.itemCollector.isDisposed())
+                        return Status.OK_STATUS;
+                    if (!result.getStatus().isOK() && VariableSetListener.this.modelHistoryCollector.logger != null)
+                        VariableSetListener.this.modelHistoryCollector.logger.log(result.getStatus());
+
+                    // Load in specified thread.
+                    final IStatus[] status = { null };
+                    Runnable loader = new Runnable() {
+                        @Override
+                        public void run() {
+                            try {
+                            	List<SubscriptionItem> sampledItems = ModelHistoryCollector.sampledSubscriptionItems(result.getSubscriptions());
+                                VariableSetListener.this.modelHistoryCollector.itemCollector.load( sampledItems );
+                            } catch (HistoryException e) {
+                                status[0] = new Status(IStatus.ERROR, "org.simantics.modeling", e.getLocalizedMessage(), e);
+                                if (VariableSetListener.this.modelHistoryCollector.logger != null)
+                                    VariableSetListener.this.modelHistoryCollector.logger.log(status[0]);
+                            } catch (DatabaseException e) {
+                                VariableSetListener.this.modelHistoryCollector.log.log(Level.WARNING, "Unexpected failure in history variable collection request.", e);
+                                status[0] = new Status(IStatus.ERROR, "org.simantics.modeling", e.getLocalizedMessage(), e); 
+                            }
+                        }
+                    };
+                    if (VariableSetListener.this.modelHistoryCollector.loadThread != null)
+                        VariableSetListener.this.modelHistoryCollector.loadThread.syncExec(loader);
+                    else
+                        loader.run();
+
+                    if (status[0] == null && VariableSetListener.this.modelHistoryCollector.loadCallback != null)
+                        VariableSetListener.this.modelHistoryCollector.loadCallback.run();
+
+                    return status[0] != null ? status[0] : Status.OK_STATUS;
+                } catch (RejectedExecutionException e) {
+                    // IThreadWorkQueue.syncExec may produce this.
+                    // Usually this means the executor has been
+                    // disposed.
+                    return new Status(IStatus.INFO, "org.simantics.modeling", e.getLocalizedMessage(), e);
+                } finally {
+                    VariableSetListener.this.modelHistoryCollector.initMutex.release();
+                }
+            }
+        };
+        job.setRule(new ObjectIdentitySchedulingRule(this.modelHistoryCollector));
+        job.setUser(false);
+        job.schedule();
+    }
+    
+    public void dispose() {
+        disposed = true;
+    }
+    
+    @Override
+    public void exception(Throwable t) {
+        this.modelHistoryCollector.initMutex.release();
+        this.modelHistoryCollector.log.log(Level.WARNING, "Unexpected failure in history variable collection request.", t);
+    }
+    
+    @Override
+    public boolean isDisposed() {
+        return disposed;
+    }
+}
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