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https://issues.apache.org/jira/browse/BEAM-8427?focusedWorklogId=334439&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-334439
]
ASF GitHub Bot logged work on BEAM-8427:
----------------------------------------
Author: ASF GitHub Bot
Created on: 25/Oct/19 23:59
Start Date: 25/Oct/19 23:59
Worklog Time Spent: 10m
Work Description: TheNeuralBit commented on pull request #9806:
[BEAM-8427] Create a table and a table provider for MongoDB
URL: https://github.com/apache/beam/pull/9806#discussion_r339267118
##########
File path:
sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/meta/provider/mongodb/MongoDbTable.java
##########
@@ -0,0 +1,118 @@
+/*
+ * 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.sql.meta.provider.mongodb;
+
+import static
org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkArgument;
+
+import java.io.Serializable;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.apache.beam.sdk.annotations.Experimental;
+import org.apache.beam.sdk.extensions.sql.impl.BeamTableStatistics;
+import org.apache.beam.sdk.extensions.sql.meta.SchemaBaseBeamTable;
+import org.apache.beam.sdk.extensions.sql.meta.Table;
+import org.apache.beam.sdk.io.mongodb.MongoDbIO;
+import org.apache.beam.sdk.options.PipelineOptions;
+import org.apache.beam.sdk.transforms.DoFn;
+import org.apache.beam.sdk.transforms.JsonToRow;
+import org.apache.beam.sdk.transforms.ParDo;
+import org.apache.beam.sdk.transforms.ParDo.SingleOutput;
+import org.apache.beam.sdk.values.PBegin;
+import org.apache.beam.sdk.values.PCollection;
+import org.apache.beam.sdk.values.PCollection.IsBounded;
+import org.apache.beam.sdk.values.POutput;
+import org.apache.beam.sdk.values.Row;
+import
org.apache.beam.vendor.calcite.v1_20_0.com.google.common.annotations.VisibleForTesting;
+import org.bson.Document;
+import org.bson.json.JsonMode;
+import org.bson.json.JsonWriterSettings;
+
+@Experimental
+public class MongoDbTable extends SchemaBaseBeamTable implements Serializable {
+ // Should match:
mongodb://username:password@localhost:27017/database/collection
+ @VisibleForTesting
+ final Pattern locationPattern =
+ Pattern.compile(
+
"(?<credsHostPort>mongodb://(?<usernamePassword>.*:.*@)?.+:\\d+)/(?<database>.+)/(?<collection>.+)");
+
+ @VisibleForTesting final String dbCollection;
+ @VisibleForTesting final String dbName;
+ @VisibleForTesting final String dbUri;
+
+ MongoDbTable(Table table) {
+ super(table.getSchema());
+
+ String location = table.getLocation();
+ Matcher matcher = locationPattern.matcher(location);
+ checkArgument(
+ matcher.matches(),
+ "MongoDb location must be in the following format:
'mongodb://(username:password@)?localhost:27017/database/collection'");
+ this.dbUri = matcher.group("credsHostPort"); // "mongodb://localhost:27017"
+ this.dbName = matcher.group("database");
+ this.dbCollection = matcher.group("collection");
+ }
+
+ @Override
+ public PCollection<Row> buildIOReader(PBegin begin) {
+ // Read MongoDb Documents
+ PCollection<Document> readDocuments =
+ MongoDbIO.read()
+ .withUri(dbUri)
+ .withDatabase(dbName)
+ .withCollection(dbCollection)
+ .expand(begin);
+
+ return readDocuments
+ // TODO: figure out a way convert Document directly to Row.
+ .apply("Convert Document to JSON", createParserParDo())
+ .apply("Transform JSON to Row", JsonToRow.withSchema(getSchema()))
+ .setRowSchema(getSchema());
+ }
+
+ @Override
+ public POutput buildIOWriter(PCollection<Row> input) {
+ throw new UnsupportedOperationException("Writing to a MongoDB is not
supported");
+ }
+
+ @Override
+ public IsBounded isBounded() {
+ return IsBounded.BOUNDED;
+ }
+
+ @Override
+ public BeamTableStatistics getTableStatistics(PipelineOptions options) {
+ return BeamTableStatistics.BOUNDED_UNKNOWN;
Review comment:
Does MongoDB have any interface we could use to implement this? If so a
TODO/Jira pointing in the right direction would be nice. If not, maybe add a
comment stating why.
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Issue Time Tracking
-------------------
Worklog Id: (was: 334439)
Time Spent: 40m (was: 0.5h)
> [SQL] Add support for MongoDB source
> ------------------------------------
>
> Key: BEAM-8427
> URL: https://issues.apache.org/jira/browse/BEAM-8427
> Project: Beam
> Issue Type: New Feature
> Components: dsl-sql
> Reporter: Kirill Kozlov
> Assignee: Kirill Kozlov
> Priority: Major
> Time Spent: 40m
> Remaining Estimate: 0h
>
> In progress:
> * Create a MongoDB table and table provider.
> * Implement buildIOReader
> * Support primitive types
> Still needs to be done:
> * Implement buildIOWrite
> * improve getTableStatistics
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