Github user chaithu14 commented on a diff in the pull request:
https://github.com/apache/apex-malhar/pull/330#discussion_r70789750
--- Diff:
library/src/main/java/com/datatorrent/lib/join/AbstractManagedStateInnerJoinOperator.java
---
@@ -0,0 +1,259 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package com.datatorrent.lib.join;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+import org.joda.time.Duration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.apex.malhar.lib.state.managed.ManagedTimeStateImpl;
+import org.apache.apex.malhar.lib.state.spillable.Spillable;
+import org.apache.hadoop.fs.Path;
+
+import com.google.common.collect.Maps;
+
+import com.datatorrent.api.Context;
+import com.datatorrent.api.DAG;
+import com.datatorrent.api.Operator;
+import com.datatorrent.lib.fileaccess.FileAccessFSImpl;
+import com.datatorrent.lib.join.managed.ManagedSpillableComplexComponent;
+import com.datatorrent.lib.join.managed.ManagedTimeStateMultiMap;
+import com.datatorrent.netlet.util.Slice;
+
+public abstract class AbstractManagedStateInnerJoinOperator<K,T> extends
AbstractInnerJoinOperator<K,T> implements
+ Operator.CheckpointNotificationListener,
Operator.CheckpointListener,Operator.IdleTimeHandler
+{
+ private static final transient Logger LOG =
LoggerFactory.getLogger(AbstractManagedStateInnerJoinOperator.class);
+ public static final String stateDir = "managedState";
+ public static final String stream1State = "stream1Data";
+ public static final String stream2State = "stream2Data";
+ private transient long sleepMillis;
+ private transient Map<JoinEvent<K,T>, Future<Slice>> waitingEvents =
Maps.newLinkedHashMap();
+ private int noOfBuckets = 1;
+ private Long bucketSpanTime;
+ protected ManagedTimeStateImpl stream1Store;
+ protected ManagedTimeStateImpl stream2Store;
+
+ @Override
+ public void createStores()
+ {
+ stream1Store = new ManagedTimeStateImpl();
+ stream2Store = new ManagedTimeStateImpl();
+ stream1Store.setNumBuckets(noOfBuckets);
+ stream2Store.setNumBuckets(noOfBuckets);
+ if (bucketSpanTime != null) {
+
stream1Store.getTimeBucketAssigner().setBucketSpan(Duration.millis(bucketSpanTime));
+
stream2Store.getTimeBucketAssigner().setBucketSpan(Duration.millis(bucketSpanTime));
+ }
+
+ if (getExpiryTime() != null) {
+
stream1Store.getTimeBucketAssigner().setExpireBefore(Duration.millis(getExpiryTime()));
+
stream2Store.getTimeBucketAssigner().setExpireBefore(Duration.millis(getExpiryTime()));
+ }
+
+ component = new ManagedSpillableComplexComponent();
+ stream1Data =
((ManagedSpillableComplexComponent)component).newSpillableByteArrayListMultimap(stream1Store,
isStream1KeyPrimary());
+ stream2Data =
((ManagedSpillableComplexComponent)component).newSpillableByteArrayListMultimap(stream2Store,
isStream2KeyPrimary());
+ }
+
+ @Override
+ protected void processTuple(T tuple, boolean isStream1Data)
+ {
+ Spillable.SpillableByteArrayListMultimap<K,T> store = isStream1Data ?
stream1Data : stream2Data;
+ K key = extractKey(tuple,isStream1Data);
+ long timeBucket = extractTime(tuple,isStream1Data);
+ ((ManagedTimeStateMultiMap)store).put(key, tuple,timeBucket);
+ joinStream(key,tuple,isStream1Data);
+ }
+
+ @Override
+ protected void joinStream(K key, T tuple, boolean isStream1Data)
+ {
+ Spillable.SpillableByteArrayListMultimap<K, T> store = isStream1Data ?
stream2Data : stream1Data;
+ Future<Slice> future = ((ManagedTimeStateMultiMap)store).getAsync(key);
+ if (future.isDone()) {
+ try {
+ joinStream(key,tuple,isStream1Data, future.get());
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
+ } catch (ExecutionException e) {
+ throw new RuntimeException(e);
+ }
+ } else {
+ waitingEvents.put(new JoinEvent<>(key,tuple,isStream1Data),future);
+ }
+ }
+
+ private void joinStream(K key, T tuple, boolean isStream1Data, Slice
valueSlice)
+ {
+ Spillable.SpillableByteArrayListMultimap<K, T> store = isStream1Data ?
stream2Data : stream1Data;
+ List<T> value = null;
+ if (((ManagedTimeStateMultiMap)store).isKeyContainsMultiValue()) {
+ value =
(List<T>)((ManagedTimeStateMultiMap)store).getStreamCodec().fromByteArray(valueSlice);
+ } else {
+ if (valueSlice != null && valueSlice.length != 0 &&
valueSlice.buffer != null) {
+ value = new ArrayList<>();
+
value.add((T)((ManagedTimeStateMultiMap)store).getStreamCodec().fromByteArray(valueSlice));
+ }
+ }
+ // Join the input tuple with the joined tuples
+ if (value != null) {
+ for (T joinedValue : value) {
+ T result = isStream1Data ? joinTuples(Arrays.asList(tuple,
joinedValue)) :
+ joinTuples(Arrays.asList(joinedValue, tuple));
+ if (result != null) {
+ emitTuple(result);
+ }
+ }
+ }
+ }
+
+ @Override
+ public void handleIdleTime()
+ {
+ if (waitingEvents.size() > 0) {
+ processWaitEvents();
+ } else {
+ /* nothing to do here, so sleep for a while to avoid busy loop */
+ try {
+ Thread.sleep(sleepMillis);
--- End diff --
Platform adds the delay.
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