twalthr commented on a change in pull request #18176:
URL: https://github.com/apache/flink/pull/18176#discussion_r783890749
##########
File path:
flink-connectors/flink-connector-files/src/main/java/org/apache/flink/connector/file/table/FileSystemConnectorOptions.java
##########
@@ -46,6 +46,16 @@
"The default partition name in case the dynamic
partition"
+ " column value is null/empty string.");
+ public static final ConfigOption<Duration> SOURCE_WATCH_INTERVAL =
Review comment:
sync with option name `SOURCE_MONITOR_INTERVAL `
##########
File path:
flink-connectors/flink-connector-files/src/main/java/org/apache/flink/connector/file/table/FileSystemConnectorOptions.java
##########
@@ -46,6 +46,16 @@
"The default partition name in case the dynamic
partition"
+ " column value is null/empty string.");
+ public static final ConfigOption<Duration> SOURCE_WATCH_INTERVAL =
+ key("source.monitor-interval")
+ .durationType()
+ .defaultValue(Duration.ofMinutes(1))
+ .withDescription(
+ "The interval in which the source checks for new
files. "
Review comment:
Could we document what we consider as `new files`? By file name, by
modification time, how does this feature work in general? If by file name how
long do we keep the info of read files in state?
##########
File path:
flink-table/flink-table-planner/src/test/java/org/apache/flink/connector/file/table/FileSystemTableSinkStreamingTest.java
##########
@@ -0,0 +1,94 @@
+/*
+ * 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.flink.connector.file.table;
+
+import org.apache.flink.table.api.DataTypes;
+import org.apache.flink.table.api.Schema;
+import org.apache.flink.table.api.TableDescriptor;
+import org.apache.flink.table.planner.runtime.utils.StreamingTestBase;
+import org.apache.flink.types.Row;
+import org.apache.flink.util.CloseableIterator;
+
+import org.junit.Test;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/** Test of the filesystem source in streaming mode. */
+public class FileSystemTableSinkStreamingTest extends StreamingTestBase {
+
+ @Test
+ public void testMonitorContinuously() throws Exception {
+ // Create temp dir
+ File testPath = TEMPORARY_FOLDER.newFolder();
+
+ // Write first csv file out
+ Files.write(
+ Paths.get(testPath.getPath(), "input_0.csv"),
+ Arrays.asList("1", "2", "3"),
+ StandardOpenOption.CREATE);
+
+ Duration monitorInterval = Duration.ofSeconds(1);
+
+ tEnv().createTable(
+ "my_streaming_table",
+ TableDescriptor.forConnector("filesystem")
+ .schema(Schema.newBuilder().column("data",
DataTypes.INT()).build())
+ .format("testcsv")
+ .option(FileSystemConnectorOptions.PATH,
testPath.getPath())
+ .option(
+
FileSystemConnectorOptions.SOURCE_WATCH_INTERVAL,
+ monitorInterval)
+ .build());
+
+ CloseableIterator<Row> resultsIterator =
+ tEnv().sqlQuery("SELECT * FROM
my_streaming_table").execute().collect();
+
+ List<Integer> actual = new ArrayList<>();
+
+ // Iterate over the first 3 rows
+ for (int i = 0; i < 3; i++) {
+ actual.add(resultsIterator.next().<Integer>getFieldAs(0));
+ }
+
+ // Write second csv file out
+ Files.write(
Review comment:
clean up afterwards?
##########
File path:
flink-table/flink-table-planner/src/test/java/org/apache/flink/connector/file/table/FileSystemTableSinkStreamingTest.java
##########
@@ -0,0 +1,94 @@
+/*
+ * 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.flink.connector.file.table;
+
+import org.apache.flink.table.api.DataTypes;
+import org.apache.flink.table.api.Schema;
+import org.apache.flink.table.api.TableDescriptor;
+import org.apache.flink.table.planner.runtime.utils.StreamingTestBase;
+import org.apache.flink.types.Row;
+import org.apache.flink.util.CloseableIterator;
+
+import org.junit.Test;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/** Test of the filesystem source in streaming mode. */
+public class FileSystemTableSinkStreamingTest extends StreamingTestBase {
+
+ @Test
+ public void testMonitorContinuously() throws Exception {
+ // Create temp dir
+ File testPath = TEMPORARY_FOLDER.newFolder();
+
+ // Write first csv file out
+ Files.write(
+ Paths.get(testPath.getPath(), "input_0.csv"),
+ Arrays.asList("1", "2", "3"),
+ StandardOpenOption.CREATE);
+
+ Duration monitorInterval = Duration.ofSeconds(1);
+
+ tEnv().createTable(
+ "my_streaming_table",
+ TableDescriptor.forConnector("filesystem")
+ .schema(Schema.newBuilder().column("data",
DataTypes.INT()).build())
+ .format("testcsv")
+ .option(FileSystemConnectorOptions.PATH,
testPath.getPath())
+ .option(
+
FileSystemConnectorOptions.SOURCE_WATCH_INTERVAL,
+ monitorInterval)
+ .build());
+
+ CloseableIterator<Row> resultsIterator =
+ tEnv().sqlQuery("SELECT * FROM
my_streaming_table").execute().collect();
+
+ List<Integer> actual = new ArrayList<>();
+
+ // Iterate over the first 3 rows
+ for (int i = 0; i < 3; i++) {
+ actual.add(resultsIterator.next().<Integer>getFieldAs(0));
+ }
+
+ // Write second csv file out
+ Files.write(
+ Paths.get(testPath.getPath(), "input_1.csv"),
+ Arrays.asList("4", "5", "6"),
+ StandardOpenOption.CREATE);
+
+ // Iterate over the next 3 rows
+ for (int i = 0; i < 3; i++) {
+ actual.add(resultsIterator.next().<Integer>getFieldAs(0));
+ }
+
+ // Close the streaming query
+ resultsIterator.close();
Review comment:
try with resources?
##########
File path:
flink-connectors/flink-connector-files/src/main/java/org/apache/flink/connector/file/table/FileSystemTableSource.java
##########
@@ -272,7 +274,17 @@ public ScanRuntimeProvider
getScanRuntimeProvider(ScanContext scanContext) {
}
private SourceProvider createSourceProvider(BulkFormat<RowData,
FileSourceSplit> bulkFormat) {
- return SourceProvider.of(FileSource.forBulkFileFormat(bulkFormat,
paths()).build());
+ FileSource.FileSourceBuilder<RowData> fileSourceBuilder =
+ FileSource.forBulkFileFormat(bulkFormat, paths());
+
+ // If streaming, enable directory watching
+ if (tableOptions.get(ExecutionOptions.RUNTIME_MODE) ==
RuntimeExecutionMode.STREAMING) {
Review comment:
the `tableOptions` don't contain the full Flink config. Not sure if even
the `Context#getConfiguration` does.
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