Github user chaithu14 commented on a diff in the pull request: https://github.com/apache/apex-malhar/pull/330#discussion_r73844252 --- Diff: library/src/main/java/com/datatorrent/lib/join/AbstractManagedStateInnerJoinOperator.java --- @@ -0,0 +1,354 @@ +/** + * 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.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.managed.ManagedTimeStateMultiValue; +import org.apache.apex.malhar.lib.state.spillable.Spillable; +import org.apache.apex.malhar.lib.state.spillable.SpillableComplexComponent; +import org.apache.apex.malhar.lib.utils.serde.Serde; +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.netlet.util.Slice; + +/** + * An abstract implementation of inner join operator over Managed state which extends from + * AbstractInnerJoinOperator. + * + * <b>Properties:</b><br> + * <b>noOfBuckets</b>: Number of buckets required for Managed state. <br> + * <b>bucketSpanTime</b>: Indicates the length of the time bucket. <br> + */ +@org.apache.hadoop.classification.InterfaceStability.Evolving +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 Map<JoinEvent<K,T>, Future<List>> waitingEvents = Maps.newLinkedHashMap(); + private int noOfBuckets = 1; + private Long bucketSpanTime; + protected ManagedTimeStateImpl stream1Store; + protected ManagedTimeStateImpl stream2Store; + + /** + * Create Managed states and stores for both the streams. + */ + @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)); + } + 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()); + } + + /** + * Process the tuple which are received from input ports with the following steps: + * 1) Extract key from the given tuple + * 2) Insert <key,tuple> into the store where store is the stream1Data if the tuple + * receives from stream1 or viceversa. + * 3) Get the values of the key in asynchronous if found it in opposite store + * 4) If the future is done then Merge the given tuple and values found from step (3) otherwise + * put it in waitingEvents + * @param tuple given tuple + * @param isStream1Data Specifies whether the given tuple belongs to stream1 or not. + */ + @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); + if (!((ManagedTimeStateMultiValue)store).put(key, tuple,timeBucket)) { + return; + } + Spillable.SpillableByteArrayListMultimap<K, T> valuestore = isStream1Data ? stream2Data : stream1Data; + Future<List> future = ((ManagedTimeStateMultiValue)valuestore).getAsync(key); + if (future.isDone()) { + try { + joinStream(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); + } + } + + @Override + public void handleIdleTime() + { + if (waitingEvents.size() > 0) { + processWaitEvents(false); + } + } + + @Override + public void beforeCheckpoint(long l) + { + stream1Store.beforeCheckpoint(l); + stream2Store.beforeCheckpoint(l); + } + + @Override + public void checkpointed(long l) + { + stream1Store.checkpointed(l); + stream2Store.checkpointed(l); + } + + @Override + public void committed(long l) + { + stream1Store.committed(l); + stream2Store.committed(l); + } + + @Override + public void setup(Context.OperatorContext context) + { + super.setup(context); + ((FileAccessFSImpl)stream1Store.getFileAccess()).setBasePath(context.getValue(DAG.APPLICATION_PATH) + Path.SEPARATOR + stateDir + Path.SEPARATOR + String.valueOf(context.getId()) + Path.SEPARATOR + stream1State); + ((FileAccessFSImpl)stream2Store.getFileAccess()).setBasePath(context.getValue(DAG.APPLICATION_PATH) + Path.SEPARATOR + stateDir + Path.SEPARATOR + String.valueOf(context.getId()) + Path.SEPARATOR + stream2State); + stream1Store.getCheckpointManager().setRecoveryPath("managed_state_" + stream1State); + stream1Store.getCheckpointManager().setRecoveryPath("managed_state_" + stream2State); + stream1Store.setup(context); + stream2Store.setup(context); + } + + @Override + public void beginWindow(long windowId) + { + stream1Store.beginWindow(windowId); + stream2Store.beginWindow(windowId); + super.beginWindow(windowId); + } + + /** + * Process the waiting events + * @param finalize finalize Whether or not to wait for future to return + */ + private void processWaitEvents(boolean finalize) + { + Iterator<Map.Entry<JoinEvent<K,T>, Future<List>>> waitIterator = waitingEvents.entrySet().iterator(); + while (waitIterator.hasNext()) { + Map.Entry<JoinEvent<K,T>, Future<List>> waitingEvent = waitIterator.next(); + Future<List> future = waitingEvent.getValue(); + if (future.isDone() || finalize) { + try { + JoinEvent<K,T> event = waitingEvent.getKey(); + joinStream(event.value,event.isStream1Data,future.get()); + } catch (InterruptedException | ExecutionException e) { + throw new RuntimeException("end window", e); + } + waitIterator.remove(); + if (!finalize) { + break; --- End diff -- Done
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