Add Managed Iceberg example (#32678)

* add iceberg example

* runtime dependency

* update to let the sink create tables

* remove dependencies

examples/java/build.gradle

@@ -66,6 +66,8 @@ dependencies {
   implementation project(":sdks:java:extensions:python")
   implementation project(":sdks:java:io:google-cloud-platform")
   implementation project(":sdks:java:io:kafka")
+  runtimeOnly project(":sdks:java:io:iceberg")
+  implementation project(":sdks:java:managed")
   implementation project(":sdks:java:extensions:ml")
   implementation library.java.avro
   implementation library.java.bigdataoss_util
@@ -100,6 +102,8 @@ dependencies {
   implementation "org.apache.httpcomponents:httpcore:4.4.13"
   implementation "com.fasterxml.jackson.core:jackson-annotations:2.14.1"
   implementation "com.fasterxml.jackson.core:jackson-core:2.14.1"
+  runtimeOnly library.java.hadoop_client
+  runtimeOnly library.java.bigdataoss_gcs_connector
   testImplementation project(path: ":runners:direct-java", configuration: "shadow")
   testImplementation project(":sdks:java:io:google-cloud-platform")
   testImplementation project(":sdks:java:extensions:ml")

examples/java/src/main/java/org/apache/beam/examples/cookbook/IcebergTaxiExamples.java

@@ -0,0 +1,119 @@
+/*
+ * 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.examples.cookbook;
+
+import java.util.Arrays;
+import java.util.Map;
+import org.apache.beam.sdk.Pipeline;
+import org.apache.beam.sdk.extensions.gcp.options.GcpOptions;
+import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO;
+import org.apache.beam.sdk.managed.Managed;
+import org.apache.beam.sdk.options.Default;
+import org.apache.beam.sdk.options.Description;
+import org.apache.beam.sdk.options.PipelineOptionsFactory;
+import org.apache.beam.sdk.options.Validation;
+import org.apache.beam.sdk.schemas.Schema;
+import org.apache.beam.sdk.schemas.transforms.Filter;
+import org.apache.beam.sdk.transforms.JsonToRow;
+import org.apache.beam.sdk.values.Row;
+import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
+
+/**
+ * Reads real-time NYC taxi ride information from {@code
+ * projects/pubsub-public-data/topics/taxirides-realtime} and writes to Iceberg tables using Beam's
+ * {@link Managed} IcebergIO sink.
+ *
+ * <p>This is a streaming pipeline that writes records to Iceberg tables dynamically, depending on
+ * each record's passenger count. New tables are created as needed. We set a triggering frequency of
+ * 10s; at around this interval, the sink will accumulate records and write them to the appropriate
+ * table, creating a new snapshot each time.
+ */
+public class IcebergTaxiExamples {
+  private static final String TAXI_RIDES_TOPIC =
+      "projects/pubsub-public-data/topics/taxirides-realtime";
+  private static final Schema TAXI_RIDE_INFO_SCHEMA =
+      Schema.builder()
+          .addStringField("ride_id")
+          .addInt32Field("point_idx")
+          .addDoubleField("latitude")
+          .addDoubleField("longitude")
+          .addStringField("timestamp")
+          .addDoubleField("meter_reading")
+          .addDoubleField("meter_increment")
+          .addStringField("ride_status")
+          .addInt32Field("passenger_count")
+          .build();
+
+  public static void main(String[] args) {
+    IcebergPipelineOptions options =
+        PipelineOptionsFactory.fromArgs(args).as(IcebergPipelineOptions.class);
+    options.setProject("apache-beam-testing");
+
+    // each record's 'passenger_count' value will be substituted in to determine
+    // its final table destination
+    // e.g. an event with 3 passengers will be written to 'iceberg_taxi.3_passengers'
+    String tableIdentifierTemplate = "iceberg_taxi.{passenger_count}_passengers";
+
+    Map<String, String> catalogProps =
+        ImmutableMap.<String, String>builder()
+            .put("catalog-impl", options.getCatalogImpl())
+            .put("warehouse", options.getWarehouse())
+            .build();
+    Map<String, Object> icebergWriteConfig =
+        ImmutableMap.<String, Object>builder()
+            .put("table", tableIdentifierTemplate)
+            .put("catalog_name", options.getCatalogName())
+            .put("catalog_properties", catalogProps)
+            .put("triggering_frequency_seconds", 10)
+            // perform a final filter to only write these two columns
+            .put("keep", Arrays.asList("ride_id", "meter_reading"))
+            .build();
+
+    Pipeline p = Pipeline.create(options);
+    p
+        // Read taxi ride data
+        .apply(PubsubIO.readStrings().fromTopic(TAXI_RIDES_TOPIC))
+        // Convert JSON strings to Beam Rows
+        .apply(JsonToRow.withSchema(TAXI_RIDE_INFO_SCHEMA))
+        // Filter to only include drop-offs
+        .apply(Filter.<Row>create().whereFieldName("ride_status", "dropoff"::equals))
+        // Write to Iceberg tables
+        .apply(Managed.write(Managed.ICEBERG).withConfig(icebergWriteConfig));
+    p.run();
+  }
+
+  public interface IcebergPipelineOptions extends GcpOptions {
+    @Description("Warehouse location where the table's data will be written to.")
+    @Default.String("gs://apache-beam-samples/iceberg-examples")
+    String getWarehouse();
+
+    void setWarehouse(String warehouse);
+
+    @Description("Fully-qualified name of the catalog class to use.")
+    @Default.String("org.apache.iceberg.hadoop.HadoopCatalog")
+    String getCatalogImpl();
+
+    void setCatalogImpl(String catalogName);
+
+    @Validation.Required
+    @Default.String("example-catalog")
+    String getCatalogName();
+
+    void setCatalogName(String catalogName);
+  }
+}