[GitHub] [gobblin] phet commented on a diff in pull request #3560: [GOBBLIN-1709] Create Iceberg Datasets Finder, Iceberg Dataset and FileSet to generate Copy Entities to support Distcp for Iceberg

[GitBox <gi...@apache.org>]

phet commented on code in PR #3560:
URL: https://github.com/apache/gobblin/pull/3560#discussion_r975553754


##########
gobblin-data-management/src/main/java/org/apache/gobblin/data/management/copy/iceberg/IcebergDataset.java:
##########
@@ -0,0 +1,215 @@
+/*
+ * 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.gobblin.data.management.copy.iceberg;
+
+import java.io.IOException;
+import java.net.URI;
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.jetbrains.annotations.NotNull;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Optional;
+import com.google.common.collect.Iterators;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+
+import lombok.Data;
+import lombok.Getter;
+import lombok.extern.slf4j.Slf4j;
+
+import org.apache.gobblin.data.management.copy.CopyConfiguration;
+import org.apache.gobblin.data.management.copy.CopyEntity;
+import org.apache.gobblin.data.management.copy.CopyableDataset;
+import org.apache.gobblin.data.management.copy.CopyableFile;
+import org.apache.gobblin.data.management.copy.prioritization.PrioritizedCopyableDataset;
+import org.apache.gobblin.data.management.partition.FileSet;
+import org.apache.gobblin.dataset.DatasetConstants;
+import org.apache.gobblin.dataset.DatasetDescriptor;
+import org.apache.gobblin.util.request_allocation.PushDownRequestor;
+
+/**
+ * Iceberg dataset implementing {@link CopyableDataset}.
+ */
+@Slf4j
+@Getter
+public class IcebergDataset implements PrioritizedCopyableDataset {
+  private final String dbName;
+  private final String inputTableName;
+  private final IcebergTable icebergTable;
+  protected final Properties properties;
+  protected final FileSystem fs;

Review Comment:
   good call--definitely helpful!  the way it's used in `getFilePathsToFileStatus()` seems like the source FS.  please clarify @meethngala 



##########
gobblin-data-management/src/main/java/org/apache/gobblin/data/management/copy/iceberg/IcebergDatasetFinder.java:
##########
@@ -0,0 +1,99 @@
+/*
+ * 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.gobblin.data.management.copy.iceberg;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Properties;
+
+import org.apache.commons.lang.StringUtils;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+
+import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+import org.apache.gobblin.dataset.DatasetConstants;
+import org.apache.gobblin.dataset.IterableDatasetFinder;
+import org.apache.gobblin.util.HadoopUtils;
+
+/**
+ * Finds {@link IcebergDataset}s. Will look for tables in a database using a {@link IcebergCatalog},
+ * and creates a {@link IcebergDataset} for each one.
+ */
+@Slf4j
+@AllArgsConstructor
+public class IcebergDatasetFinder implements IterableDatasetFinder<IcebergDataset> {
+
+  public static final String ICEBERG_DATASET_PREFIX = DatasetConstants.PLATFORM_ICEBERG + ".dataset";
+  public static final String ICEBERG_HIVE_CATALOG_METASTORE_URI_KEY = ICEBERG_DATASET_PREFIX + ".hive.metastore.uri";
+  public static final String ICEBERG_DB_NAME = ICEBERG_DATASET_PREFIX + ".database.name";
+  public static final String ICEBERG_TABLE_NAME = ICEBERG_DATASET_PREFIX + ".table.name";
+
+  private String dbName;
+  private String tblName;
+  private final Properties properties;
+  protected final FileSystem fs;

Review Comment:
   +100



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