1 files changed, 161 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/TimelyUniquenessEnforcerNode.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/TimelyUniquenessEnforcerNode.java
new file mode 100644
index 00000000..4c4b4fc0
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+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/single/TimelyUniquenessEnforcerNode.java
@@ -0,0 +1,161 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2019, Tamas Szabo, Istvan Rath and Daniel Varro
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-v20.html.
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ *******************************************************************************/
+package tools.refinery.viatra.runtime.rete.single;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
+import tools.refinery.viatra.runtime.matchers.util.Direction;
+import tools.refinery.viatra.runtime.matchers.util.Signed;
+import tools.refinery.viatra.runtime.matchers.util.TimelyMemory;
+import tools.refinery.viatra.runtime.matchers.util.timeline.Diff;
+import tools.refinery.viatra.runtime.matchers.util.timeline.Timeline;
+import tools.refinery.viatra.runtime.rete.index.ProjectionIndexer;
+import tools.refinery.viatra.runtime.rete.index.timely.TimelyMemoryIdentityIndexer;
+import tools.refinery.viatra.runtime.rete.index.timely.TimelyMemoryNullIndexer;
+import tools.refinery.viatra.runtime.rete.matcher.TimelyConfiguration.TimelineRepresentation;
+import tools.refinery.viatra.runtime.rete.network.ReteContainer;
+import tools.refinery.viatra.runtime.rete.network.communication.CommunicationGroup;
+import tools.refinery.viatra.runtime.rete.network.communication.Timestamp;
+import tools.refinery.viatra.runtime.rete.network.communication.timely.ResumableNode;
+import tools.refinery.viatra.runtime.rete.network.mailbox.Mailbox;
+import tools.refinery.viatra.runtime.rete.network.mailbox.timely.TimelyMailbox;
+
+/**
+ * Timely uniqueness enforcer node implementation.
+ * 
+ * @author Tamas Szabo
+ * @noinstantiate This class is not intended to be instantiated by clients.
+ * @noextend This class is not intended to be subclassed by clients.
+ * @since 2.4
+ */
+public class TimelyUniquenessEnforcerNode extends AbstractUniquenessEnforcerNode implements ResumableNode {
+
+    protected final TimelyMemory<Timestamp> memory;
+    /**
+     * @since 2.4
+     */
+    protected CommunicationGroup group;
+
+    public TimelyUniquenessEnforcerNode(final ReteContainer container, final int tupleWidth) {
+        super(container, tupleWidth);
+        this.memory = new TimelyMemory<Timestamp>(
+                container.getTimelyConfiguration().getTimelineRepresentation() == TimelineRepresentation.FAITHFUL);
+        container.registerClearable(this.memory);
+        this.mailbox = instantiateMailbox();
+        container.registerClearable(this.mailbox);
+    }
+
+    protected Mailbox instantiateMailbox() {
+        return new TimelyMailbox(this, this.reteContainer);
+    }
+
+    @Override
+    public void pullInto(final Collection<Tuple> collector, final boolean flush) {
+        for (final Tuple tuple : this.memory.getTuplesAtInfinity()) {
+            collector.add(tuple);
+        }
+    }
+
+    @Override
+    public CommunicationGroup getCurrentGroup() {
+        return this.group;
+    }
+
+    @Override
+    public void setCurrentGroup(final CommunicationGroup group) {
+        this.group = group;
+    }
+
+    @Override
+    public Set<Tuple> getTuples() {
+        return this.memory.getTuplesAtInfinity();
+    }
+
+    /**
+     * @since 2.4
+     */
+    @Override
+    public Timestamp getResumableTimestamp() {
+        return this.memory.getResumableTimestamp();
+    }
+
+    /**
+     * @since 2.4
+     */
+    @Override
+    public void resumeAt(final Timestamp timestamp) {
+        final Map<Tuple, Diff<Timestamp>> diffMap = this.memory.resumeAt(timestamp);
+        for (final Entry<Tuple, Diff<Timestamp>> entry : diffMap.entrySet()) {
+            for (final Signed<Timestamp> signed : entry.getValue()) {
+                propagate(signed.getDirection(), entry.getKey(), signed.getPayload());
+            }
+        }
+        final Timestamp nextTimestamp = this.memory.getResumableTimestamp();
+        if (nextTimestamp != null) {
+            this.group.notifyHasMessage(this.mailbox, nextTimestamp);
+        }
+    }
+
+    @Override
+    public void update(final Direction direction, final Tuple update, final Timestamp timestamp) {
+        Diff<Timestamp> resultDiff = null;
+        if (direction == Direction.INSERT) {
+            resultDiff = this.memory.put(update, timestamp);
+        } else {
+            try {
+                resultDiff = this.memory.remove(update, timestamp);
+            } catch (final IllegalStateException e) {
+                issueError("[INTERNAL ERROR] Duplicate deletion of " + update + " was detected in "
+                        + this.getClass().getName() + " " + this + " for pattern(s) "
+                        + getTraceInfoPatternsEnumerated(), e);
+                // diff will remain unset in case of the exception, it is time to return
+                return;
+            }
+        }
+
+        for (final Signed<Timestamp> signed : resultDiff) {
+            propagate(signed.getDirection(), update, signed.getPayload());
+        }
+    }
+
+    @Override
+    public void pullIntoWithTimeline(final Map<Tuple, Timeline<Timestamp>> collector, final boolean flush) {
+        collector.putAll(this.memory.asMap());
+    }
+
+    @Override
+    public ProjectionIndexer getNullIndexer() {
+        if (this.memoryNullIndexer == null) {
+            this.memoryNullIndexer = new TimelyMemoryNullIndexer(this.reteContainer, this.tupleWidth, this.memory, this,
+                    this, this.specializedListeners);
+            this.getCommunicationTracker().registerDependency(this, this.memoryNullIndexer);
+        }
+        return this.memoryNullIndexer;
+    }
+
+    @Override
+    public ProjectionIndexer getIdentityIndexer() {
+        if (this.memoryIdentityIndexer == null) {
+            this.memoryIdentityIndexer = new TimelyMemoryIdentityIndexer(this.reteContainer, this.tupleWidth,
+                    this.memory, this, this, this.specializedListeners);
+            this.getCommunicationTracker().registerDependency(this, this.memoryIdentityIndexer);
+        }
+        return this.memoryIdentityIndexer;
+    }
+
+    @Override
+    public void networkStructureChanged() {
+        super.networkStructureChanged();
+    }
+
+}
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