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From chinmaykolhatkar <...@git.apache.org>
Subject [GitHub] apex-malhar pull request #330: Initial cut of Inner Join operator for REVIEW...
Date Mon, 25 Jul 2016 15:43:32 GMT
Github user chinmaykolhatkar commented on a diff in the pull request:

    https://github.com/apache/apex-malhar/pull/330#discussion_r72088749
  
    --- Diff: library/src/main/java/com/datatorrent/lib/join/POJOInnerJoinOperator.java ---
    @@ -0,0 +1,247 @@
    +/**
    + * 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.lang.reflect.Array;
    +import java.util.HashMap;
    +import java.util.Map;
    +
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import org.apache.commons.lang3.ClassUtils;
    +
    +import com.datatorrent.api.Context;
    +import com.datatorrent.api.DefaultInputPort;
    +import com.datatorrent.api.DefaultOutputPort;
    +import com.datatorrent.api.Operator;
    +import com.datatorrent.api.StreamCodec;
    +import com.datatorrent.api.annotation.InputPortFieldAnnotation;
    +import com.datatorrent.api.annotation.OutputPortFieldAnnotation;
    +import com.datatorrent.lib.util.PojoUtils;
    +
    +/**
    + * Concrete implementation of AbstractManagedStateInnerJoinOperator and receives objects
from both streams.
    + *
    + * @displayName POJO Inner Join Operator
    + * @tags join
    + */
    +public class POJOInnerJoinOperator extends AbstractManagedStateInnerJoinOperator<Object,Object>
implements Operator.ActivationListener<Context>
    +{
    +  private static final transient Logger LOG = LoggerFactory.getLogger(POJOInnerJoinOperator.class);
    +  private transient long timeIncrement;
    +  private transient FieldObjectMap[] inputFieldObjects = (FieldObjectMap[])Array.newInstance(FieldObjectMap.class,
2);
    +  protected Class<?> outputClass;
    +  private long time = System.currentTimeMillis();
    --- End diff --
    
    Any specific reason why time is non-transient. I believe this variable is used to extract
time from the tuple. But as this is non-transient, it'll restore back from the state even
after crash. Is this expected behaviour?


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