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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2020/04/20 01:06:46 UTC
[GitHub] [beam] rezarokni commented on a change in pull request #11437: [BEAM-9770] Add BigQueryIO deadletter pattern
rezarokni commented on a change in pull request #11437:
URL: https://github.com/apache/beam/pull/11437#discussion_r411034442
##########
File path: examples/java/src/main/java/org/apache/beam/examples/snippets/Snippets.java
##########
@@ -753,35 +750,93 @@ public static void main(String[] args) {
// [START CustomSessionWindow5]
PCollection<TableRow> p =
- Pipeline.create()
- .apply(
- "Create data",
- Create.timestamped(
- TimestampedValue.of(
- new TableRow().set("user", "mobile").set("score", 12).set("gap", 5),
- new Instant()),
- TimestampedValue.of(
- new TableRow().set("user", "desktop").set("score", 4), new Instant()),
- TimestampedValue.of(
- new TableRow().set("user", "mobile").set("score", -3).set("gap", 5),
- new Instant().plus(2000)),
- TimestampedValue.of(
- new TableRow().set("user", "mobile").set("score", 2).set("gap", 5),
- new Instant().plus(9000)),
- TimestampedValue.of(
- new TableRow().set("user", "mobile").set("score", 7).set("gap", 5),
- new Instant().plus(12000)),
- TimestampedValue.of(
- new TableRow().set("user", "desktop").set("score", 10),
- new Instant().plus(12000))));
+ Pipeline.create()
+ .apply(
+ "Create data",
+ Create.timestamped(
+ TimestampedValue.of(
+ new TableRow().set("user", "mobile").set("score", 12).set("gap", 5),
+ new Instant()),
+ TimestampedValue.of(
+ new TableRow().set("user", "desktop").set("score", 4), new Instant()),
+ TimestampedValue.of(
+ new TableRow().set("user", "mobile").set("score", -3).set("gap", 5),
+ new Instant().plus(2000)),
+ TimestampedValue.of(
+ new TableRow().set("user", "mobile").set("score", 2).set("gap", 5),
+ new Instant().plus(9000)),
+ TimestampedValue.of(
+ new TableRow().set("user", "mobile").set("score", 7).set("gap", 5),
+ new Instant().plus(12000)),
+ TimestampedValue.of(
+ new TableRow().set("user", "desktop").set("score", 10),
+ new Instant().plus(12000))));
// [END CustomSessionWindow5]
// [START CustomSessionWindow6]
p.apply(
- "Window into sessions",
- Window.<TableRow>into(
- DynamicSessions.withDefaultGapDuration(Duration.standardSeconds(10))));
+ "Window into sessions",
+ Window.<TableRow>into(
+ DynamicSessions.withDefaultGapDuration(Duration.standardSeconds(10))));
// [END CustomSessionWindow6]
+ }
+
+ public static class DeadLetterBigQuery {
+ public static void deadletter(String[] args) {
+ // [START BigQueryIODeadLetter]
+ // Create pipeline
+ PipelineOptions options =
+ PipelineOptionsFactory.fromArgs(args).withValidation().as(BigQueryOptions.class);
+
+ Pipeline p = Pipeline.create(options);
+
+ // Create a bug by writing the 2nd value as null. The API will correctly
+ // throw an error when trying to insert a null value into a REQUIRED field.
+ WriteResult result =
+ p.apply(Create.of(1, 2))
+ .apply(
+ BigQueryIO.<Integer>write()
+ .withSchema(
+ new TableSchema()
+ .setFields(
+ com.google.common.collect.ImmutableList.of(
+ new TableFieldSchema()
+ .setName("num")
+ .setType("INTEGER")
+ .setMode("REQUIRED"))))
+ .to("Test.dummyTable")
+ .withFormatFunction(x -> new TableRow().set("num", (x == 2) ? null : x))
+ .withFailedInsertRetryPolicy(InsertRetryPolicy.neverRetry())
Review comment:
Fixed.
##########
File path: website/src/documentation/patterns/bigqueryio.md
##########
@@ -0,0 +1,37 @@
+---
+layout: section
+title: "BigQuery patterns"
+section_menu: section-menu/documentation.html
+permalink: /documentation/patterns/bigqueryio/
+---
+<!--
+Licensed 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.
+-->
+
+# Google BigQuery patterns
+
+The samples on this page show you common patterns for use with BigQueryIO.
+
+## BigQueryIO deadletter pattern
+In production systems, it is useful to implement the deadletter pattern with BigQueryIO outputting any elements which had errors during processing by BigQueryIO into another PCollection for further processing.
+
+When using `STREAMING_INSERTS` you can use the `WriteResult` object to access a `PCollection` with the `TableRows` that failed to be inserted into BigQuery.
Review comment:
Fixed.
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