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https://issues.apache.org/jira/browse/APEXMALHAR-1701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15383557#comment-15383557
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ASF GitHub Bot commented on APEXMALHAR-1701:
--------------------------------------------
Github user bhupeshchawda commented on a diff in the pull request:
https://github.com/apache/apex-malhar/pull/335#discussion_r71270656
--- Diff:
library/src/main/java/org/apache/apex/malhar/lib/dedup/AbstractDeduper.java ---
@@ -0,0 +1,463 @@
+/**
+ * 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 org.apache.apex.malhar.lib.dedup;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+import javax.validation.constraints.NotNull;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.apex.malhar.lib.state.BucketedState;
+import
org.apache.apex.malhar.lib.state.managed.ManagedTimeUnifiedStateImpl;
+import org.apache.apex.malhar.lib.state.managed.TimeBucketAssigner;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Maps;
+import com.google.common.util.concurrent.Futures;
+
+import com.datatorrent.api.AutoMetric;
+import com.datatorrent.api.Context;
+import com.datatorrent.api.Context.OperatorContext;
+import com.datatorrent.api.DAG;
+import com.datatorrent.api.DefaultInputPort;
+import com.datatorrent.api.DefaultOutputPort;
+import com.datatorrent.api.Operator;
+import com.datatorrent.api.Operator.ActivationListener;
+import com.datatorrent.api.annotation.OperatorAnnotation;
+import com.datatorrent.api.annotation.OutputPortFieldAnnotation;
+import com.datatorrent.lib.fileaccess.FileAccessFSImpl;
+import com.datatorrent.lib.fileaccess.TFileImpl;
+import com.datatorrent.netlet.util.Slice;
+
+/**
+ * Abstract class which allows de-duplicating incoming tuples based on a
configured key.
+ * Also supports expiry mechanism based on a configurable expiry period
configured using {@link TimeBucketAssigner}
+ * in {@link ManagedTimeUnifiedStateImpl}
+ *
+ * @param <T> type of events
+ */
+@Evolving
+@OperatorAnnotation(checkpointableWithinAppWindow = false)
+public abstract class AbstractDeduper<T>
+ implements Operator, Operator.IdleTimeHandler,
ActivationListener<Context>, Operator.CheckpointNotificationListener
+{
+ /**
+ * The input port on which events are received.
+ */
+ public final transient DefaultInputPort<T> input = new
DefaultInputPort<T>()
+ {
+ @Override
+ public final void process(T tuple)
+ {
+ processTuple(tuple);
+ }
+ };
+
+ /**
+ * The output port on which deduped events are emitted.
+ */
+ public final transient DefaultOutputPort<T> output = new
DefaultOutputPort<T>();
--- End diff --
Will change it
> Deduper : create a deduper backed by Managed State
> --------------------------------------------------
>
> Key: APEXMALHAR-1701
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-1701
> Project: Apache Apex Malhar
> Issue Type: Task
> Components: algorithms
> Reporter: Chandni Singh
> Assignee: Chandni Singh
>
> Need a de-deduplicator operator that is based on Managed State.
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