[
https://issues.apache.org/jira/browse/BEAM-2953?focusedWorklogId=155659&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-155659
]
ASF GitHub Bot logged work on BEAM-2953:
----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Oct/18 00:24
Start Date: 18/Oct/18 00:24
Worklog Time Spent: 10m
Work Description: akedin commented on a change in pull request #6540:
[BEAM-2953] Advanced Timeseries examples.
URL: https://github.com/apache/beam/pull/6540#discussion_r226136139
##########
File path:
sdks/java/extensions/timeseries/src/main/java/org/apache/beam/sdk/extensions/timeseries/transforms/GetValueFromKV.java
##########
@@ -0,0 +1,36 @@
+/*
+ * 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.beam.sdk.extensions.timeseries.transforms;
+
+import org.apache.beam.sdk.annotations.Experimental;
+import org.apache.beam.sdk.transforms.DoFn;
+import org.apache.beam.sdk.values.KV;
+
+/**
+ * Extract the value from a KV.
+ *
+ * @param <T>
+ */
+@Experimental
+public class GetValueFromKV<K, T> extends DoFn<KV<K, T>, T> {
Review comment:
Wouldn't
[this](https://github.com/apache/beam/blob/279a05604b83a54e8e5a79e13d8761f94841f326/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/Values.java#L43)
work?
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Issue Time Tracking
-------------------
Worklog Id: (was: 155659)
Time Spent: 3h 50m (was: 3h 40m)
> Timeseries processing extensions using state API
> ------------------------------------------------
>
> Key: BEAM-2953
> URL: https://issues.apache.org/jira/browse/BEAM-2953
> Project: Beam
> Issue Type: Improvement
> Components: sdk-ideas
> Affects Versions: 2.7.0
> Reporter: Reza ardeshir rokni
> Assignee: Reuven Lax
> Priority: Minor
> Time Spent: 3h 50m
> Remaining Estimate: 0h
>
> A general set of timeseries transforms that abstract the user from the
> process of dealing with some of the common problems when dealing with
> timeseries using BEAM (in stream or batch mode).
> BEAM can be used to build out some very interesting pre-processing stages for
> time series data. Some examples that will be useful:
> - Downsampling time series based on simple MIN, MAX, COUNT, SUM, LAST, FIRST
> - Creating a value for each downsampled window even if no value has been
> emitted for the specific key.
> - Loading the value of a downsample with the previous value (used in FX with
> previous close being brought into current open value)
>
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