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https://issues.apache.org/jira/browse/BEAM-2939?focusedWorklogId=170083&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-170083
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ASF GitHub Bot logged work on BEAM-2939:
----------------------------------------
Author: ASF GitHub Bot
Created on: 28/Nov/18 01:09
Start Date: 28/Nov/18 01:09
Worklog Time Spent: 10m
Work Description: lukecwik commented on a change in pull request #6969:
[BEAM-2939] SplittableDoFn Java SDK API Changes
URL: https://github.com/apache/beam/pull/6969#discussion_r236908314
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/Backlogs.java
##########
@@ -0,0 +1,47 @@
+/*
+ * 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.splittabledofn;
+
+/** Definitions and convenience methods for reporting/consuming/updating
backlogs. */
+public final class Backlogs {
+ /**
+ * {@link RestrictionTracker}s which can provide a backlog should implement
this interface.
+ * Implementations that do not implement this interface will be assumed to
have an unknown
+ * backlog.
+ *
+ * <p>By default, the backlog partition identifier is represented as the
encoded element and
+ * restriction pair. See {@link HasPartitionedBacklog} for {@link
RestrictionTracker}s that report
+ * backlogs over a shared resource.
+ */
+ public interface HasBacklog {
+ Backlog getBacklog();
+ }
+
+ /**
+ * {@link RestrictionTracker}s which can provide a backlog that is from a
shared resource such as
+ * a message queue should implement this interface to provide the partition
identifier. The
+ * partition identifier is used by runners during backlog aggregation.
+ *
+ * <p>This allows runners to understand as to how to aggregate backlogs.
+ *
+ * <p>Returns the partition identifier.
+ */
+ public interface HasPartitionedBacklog extends HasBacklog {
+ byte[] getBacklogPartition();
Review comment:
I expanded on this.
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Issue Time Tracking
-------------------
Worklog Id: (was: 170083)
Time Spent: 10h (was: 9h 50m)
> Fn API streaming SDF support
> ----------------------------
>
> Key: BEAM-2939
> URL: https://issues.apache.org/jira/browse/BEAM-2939
> Project: Beam
> Issue Type: Improvement
> Components: beam-model
> Reporter: Henning Rohde
> Assignee: Luke Cwik
> Priority: Major
> Labels: portability
> Time Spent: 10h
> Remaining Estimate: 0h
>
> The Fn API should support streaming SDF. Detailed design TBD.
> Once design is ready, expand subtasks similarly to BEAM-2822.
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