Github user chaithu14 commented on a diff in the pull request:
https://github.com/apache/apex-malhar/pull/324#discussion_r68559252
--- Diff:
library/src/main/java/org/apache/apex/malhar/lib/state/spillable/SpillableByteArrayListMultimapImpl.java
---
@@ -0,0 +1,241 @@
+package org.apache.apex.malhar.lib.state.spillable;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import javax.annotation.Nullable;
+import javax.validation.constraints.NotNull;
+
+import org.apache.apex.malhar.lib.utils.serde.PassThruByteArraySliceSerde;
+import org.apache.apex.malhar.lib.utils.serde.Serde;
+import org.apache.apex.malhar.lib.utils.serde.SerdeIntSlice;
+import org.apache.apex.malhar.lib.utils.serde.SliceUtils;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.Multiset;
+
+import com.datatorrent.api.Context;
+import com.datatorrent.netlet.util.Slice;
+
+/**
+ * Created by tfarkas on 6/12/16.
+ */
+public class SpillableByteArrayListMultimapImpl<K, V> implements
Spillable.SpillableByteArrayListMultimap<K, V>,
+ Spillable.SpillableComponent
+{
+ public static final int DEFAULT_BATCH_SIZE = 1000;
+ public static final byte[] SIZE_KEY_SUFFIX = new byte[]{(byte)0,
(byte)0, (byte)0};
+
+ private int batchSize = DEFAULT_BATCH_SIZE;
+
+ private WindowBoundedMapCache<K, SpillableArrayListImpl<V>> cache = new
WindowBoundedMapCache<>();
+
+ @NotNull
+ private SpillableByteMapImpl<byte[], Integer> map;
+
+ private SpillableStateStore store;
+ private byte[] identifier;
+ private long bucket;
+ private Serde<K, Slice> serdeKey;
+ private Serde<V, Slice> serdeValue;
+
+ public SpillableByteArrayListMultimapImpl(SpillableStateStore store,
byte[] identifier, long bucket,
+ Serde<K, Slice> serdeKey,
+ Serde<V, Slice> serdeValue)
+ {
+ this.store = Preconditions.checkNotNull(store);
+ this.identifier = Preconditions.checkNotNull(identifier);
+ this.bucket = bucket;
+ this.serdeKey = Preconditions.checkNotNull(serdeKey);
+ this.serdeValue = Preconditions.checkNotNull(serdeValue);
+
+ map = new SpillableByteMapImpl(store, identifier, bucket, new
PassThruByteArraySliceSerde(), new SerdeIntSlice());
+ }
+
+ @Override
+ public List<V> get(@Nullable K key)
+ {
+ return getHelper(key);
+ }
+
+ private SpillableArrayListImpl<V> getHelper(@Nullable K key)
+ {
+ SpillableArrayListImpl<V> spillableArrayList = cache.get(key);
+
+ if (spillableArrayList == null) {
+ Slice keyPrefix = serdeKey.serialize(key);
+ Integer size = map.get(SliceUtils.concatenate(keyPrefix,
SIZE_KEY_SUFFIX));
+
+ if (size == null) {
+ return null;
+ }
+
+ spillableArrayList = new SpillableArrayListImpl<V>(bucket,
keyPrefix.buffer, store, serdeValue);
+ spillableArrayList.setSize(size);
+
+ cache.put(key, spillableArrayList);
+ }
+
+ return spillableArrayList;
+ }
+
+ @Override
+ public Set<K> keySet()
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public Multiset<K> keys()
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public Collection<V> values()
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public Collection<Map.Entry<K, V>> entries()
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public List<V> removeAll(@Nullable Object key)
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public void clear()
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public int size()
+ {
+ return map.size();
+ }
+
+ @Override
+ public boolean isEmpty()
+ {
+ return map.isEmpty();
+ }
+
+ @Override
+ public boolean containsKey(@Nullable Object key)
+ {
+ return
map.containsKey(SliceUtils.concatenate(serdeKey.serialize((K)key),
SIZE_KEY_SUFFIX));
+ }
+
+ @Override
+ public boolean containsValue(@Nullable Object value)
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public boolean containsEntry(@Nullable Object key, @Nullable Object
value)
+ {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public boolean put(@Nullable K key, @Nullable V value)
+ {
+ SpillableArrayListImpl<V> spillableArrayList = getHelper(key);
+
+ if (spillableArrayList == null) {
+ spillableArrayList = new SpillableArrayListImpl<V>(bucket,
serdeKey.serialize(key).buffer, store, serdeValue);
+
+ cache.put(key, spillableArrayList);
+ }
+
+ spillableArrayList.add(value);
--- End diff --
I think, map update also be in put(), otherwise, size will change only at
endWindow().
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