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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXMALHAR-1897) Create ManagedState
Date Fri, 18 Mar 2016 22:10:34 GMT

    [ https://issues.apache.org/jira/browse/APEXMALHAR-1897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15202255#comment-15202255
] 

ASF GitHub Bot commented on APEXMALHAR-1897:
--------------------------------------------

Github user amberarrow commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-malhar/pull/145#discussion_r56729305
  
    --- Diff: library/src/main/java/com/datatorrent/lib/state/managed/TimeBucketAssigner.java
---
    @@ -0,0 +1,236 @@
    +/**
    + * 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.state.managed;
    +
    +import javax.validation.constraints.NotNull;
    +
    +import org.joda.time.Duration;
    +import org.joda.time.Instant;
    +
    +import com.esotericsoftware.kryo.serializers.FieldSerializer;
    +import com.esotericsoftware.kryo.serializers.JavaSerializer;
    +import com.google.common.base.Preconditions;
    +
    +import com.datatorrent.api.Context;
    +import com.datatorrent.lib.appdata.query.WindowBoundedService;
    +
    +/**
    + * Keeps track of time buckets.<br/>
    + *
    + * The data of a bucket is further divided into time-buckets. This component controls
the length of time buckets,
    + * which time-bucket an event falls into and sliding the time boundaries.
    + * <p/>
    + *
    + * The configuration {@link #expireBefore} and {@link #bucketSpan}  are used to calculate
number of time-buckets.
    + * For eg. if <code>expireBefore = 1 hour</code> and <code>bucketSpan
= 30 minutes</code>, then <code>
    + *   numBuckets = 60 minutes/ 30 minutes = 2 </code>.
    + * <p/>
    --- End diff --
    
    Are the values of `expireBefore` and `bucketSpan` intended to be fixed after initialization
or are they modifiable ?


> Create ManagedState
> -------------------
>
>                 Key: APEXMALHAR-1897
>                 URL: https://issues.apache.org/jira/browse/APEXMALHAR-1897
>             Project: Apache Apex Malhar
>          Issue Type: Sub-task
>            Reporter: Chandni Singh
>            Assignee: Chandni Singh
>             Fix For: 3.4.0
>
>
> ManagedState is described in the document below:
> https://docs.google.com/document/d/1gRWN9ufKSZSZD0N-pthlhpC9TZ8KwJ6hJlAX6nxl5f8/edit#heading=h.z87ti1fwyt0t



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