Github user ilooner commented on a diff in the pull request:
https://github.com/apache/apex-malhar/pull/345#discussion_r71095332
--- Diff:
library/src/main/java/org/apache/apex/malhar/lib/window/impl/SpillableWindowedKeyedStorage.java
---
@@ -0,0 +1,136 @@
+package org.apache.apex.malhar.lib.window.impl;
+
+import java.util.List;
+import java.util.Map;
+
+import javax.annotation.concurrent.Immutable;
+import javax.validation.constraints.NotNull;
+
+import
org.apache.apex.malhar.lib.state.spillable.SpillableByteArrayListMultimapImpl;
+import org.apache.apex.malhar.lib.state.spillable.SpillableByteMapImpl;
+import
org.apache.apex.malhar.lib.state.spillable.managed.ManagedStateSpillableStateStore;
+import org.apache.apex.malhar.lib.utils.serde.Serde;
+import org.apache.apex.malhar.lib.window.Window;
+import org.apache.apex.malhar.lib.window.WindowedStorage;
+import org.apache.commons.lang3.tuple.ImmutablePair;
+
+import com.datatorrent.netlet.util.Slice;
+
+/**
+ * Created by david on 7/15/16.
+ */
+public class SpillableWindowedKeyedStorage<K, V> implements
WindowedStorage.WindowedKeyedStorage<K, V>
+{
+ @NotNull
+ private final ManagedStateSpillableStateStore store;
+
+ protected final SpillableByteMapImpl<ImmutablePair<Window, K>, V>
internValues;
+ protected final SpillableByteArrayListMultimapImpl<Window, K> internKeys;
+
+ private SpillableWindowedKeyedStorage()
+ {
+ // for kryo
+ store = null;
+ internValues = null;
+ internKeys = null;
+ }
+
+ public SpillableWindowedKeyedStorage(long bucket, byte[] identifier,
Serde<Window, Slice> serdeWindow, Serde<K, Slice> serdeKey,
Serde<ImmutablePair<Window, K>, Slice> serdeWindowKey, Serde<V, Slice>
serdeValue)
+ {
+ store = new ManagedStateSpillableStateStore();
+ store.getCheckpointManager().setNeedBucketFile(false);
+ internValues = new SpillableByteMapImpl<>(store, identifier, bucket,
serdeWindowKey, serdeValue);
+ internKeys = new SpillableByteArrayListMultimapImpl<>(store,
identifier, bucket, serdeWindow, serdeKey);
+ }
+
+ @Override
+ public boolean containsWindow(Window window)
+ {
+ return internKeys.containsKey(window);
+ }
+
+ @Override
+ public long size()
+ {
+ return internKeys.size();
+ }
+
+ @Override
+ public void remove(Window window)
+ {
+ List<K> keys = internKeys.get(window);
+ for (K key : keys) {
+ internValues.remove(new ImmutablePair<>(window, key));
+ }
+ internKeys.removeAll(window);
+ }
+
+ @Override
+ public void migrateWindow(Window fromWindow, Window toWindow)
+ {
+ List<K> keys = internKeys.get(fromWindow);
+ internValues.remove(toWindow);
+ for (K key : keys) {
+ internKeys.put(toWindow, key);
+ ImmutablePair<Window, K> oldKey = new ImmutablePair<>(fromWindow,
key);
+ ImmutablePair<Window, K> newKey = new ImmutablePair<>(toWindow, key);
+
+ V value = internValues.get(oldKey);
+ internValues.remove(oldKey);
+ internValues.put(newKey, value);
+ }
+ internKeys.removeAll(fromWindow);
+ }
+
+ @Override
+ public void beginApexWindow(long windowId)
+ {
+ store.beginWindow(windowId);
+ }
+
+ @Override
+ public void endApexWindow()
+ {
+ store.endWindow();
--- End diff --
spillableComplexComponent.endWindow()
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