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https://issues.apache.org/jira/browse/BEAM-3979?focusedWorklogId=94246&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-94246
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ASF GitHub Bot logged work on BEAM-3979:
----------------------------------------
Author: ASF GitHub Bot
Created on: 23/Apr/18 18:53
Start Date: 23/Apr/18 18:53
Worklog Time Spent: 10m
Work Description: jkff commented on a change in pull request #4989:
[BEAM-3979] Start completing the new DoFn vision: plumb context parameters into
process functions.
URL: https://github.com/apache/beam/pull/4989#discussion_r183501229
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/DoFnOutputReceivers.java
##########
@@ -0,0 +1,75 @@
+/*
+ * 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.transforms;
+
+import javax.annotation.Nullable;
+import org.apache.beam.sdk.transforms.DoFn.MultiOutputReceiver;
+import org.apache.beam.sdk.transforms.DoFn.OutputReceiver;
+import org.apache.beam.sdk.values.TupleTag;
+import org.joda.time.Instant;
+
+/**
+ * Common {@link OutputReceiver} and {@link MultiOutputReceiver} classes.
+ */
+public class DoFnOutputReceivers {
+ /**
+ * A {@link OutputReceiver} that delegates to a {@link DoFn.WindowedContext}.
+ */
+ public static class WindowedContextOutputReceiver<T> implements
OutputReceiver<T> {
+ DoFn<?, ?>.WindowedContext context;
+ @Nullable TupleTag<T> outputTag;
+ public WindowedContextOutputReceiver(DoFn<?, ?>.WindowedContext context,
Review comment:
Probably would be better to package these under static factory functions.
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Issue Time Tracking
-------------------
Worklog Id: (was: 94246)
Time Spent: 1h 40m (was: 1.5h)
> New DoFn should allow injecting of all parameters in ProcessContext
> -------------------------------------------------------------------
>
> Key: BEAM-3979
> URL: https://issues.apache.org/jira/browse/BEAM-3979
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Affects Versions: 2.4.0
> Reporter: Reuven Lax
> Assignee: Reuven Lax
> Priority: Major
> Fix For: 2.5.0
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> This was intended in the past, but never completed. Ideally all primitive
> parameters in ProcessContext should be injectable, and OutputReceiver
> parameters can be used to collection output. So, we should be able to write a
> DoFn as follows
> @ProcessElement
> public void process(@Element String word, OutputReceiver<String> receiver) {
> receiver.output(word.toUpperCase());
> }
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