1 files changed, 79 insertions, 0 deletions
diff --git a/contrib/storage-hive/core/src/main/java/org/apache/drill/exec/store/hive/HiveDrillNativeParquetScanBatchCreator.java b/contrib/storage-hive/core/src/main/java/org/apache/drill/exec/store/hive/HiveDrillNativeParquetScanBatchCreator.java
new file mode 100644
index 000000000..669369b3e
--- /dev/null
+++ b/contrib/storage-hive/core/src/main/java/org/apache/drill/exec/store/hive/HiveDrillNativeParquetScanBatchCreator.java
@@ -0,0 +1,79 @@
+/*
+ * 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.drill.exec.store.hive;
+
+import com.google.common.base.Preconditions;
+import org.apache.drill.common.exceptions.ExecutionSetupException;
+import org.apache.drill.exec.ops.ExecutorFragmentContext;
+import org.apache.drill.exec.ops.OperatorContext;
+import org.apache.drill.exec.physical.impl.BatchCreator;
+import org.apache.drill.exec.record.CloseableRecordBatch;
+import org.apache.drill.exec.record.RecordBatch;
+import org.apache.drill.exec.server.options.OptionManager;
+import org.apache.drill.exec.store.dfs.DrillFileSystem;
+import org.apache.drill.exec.store.parquet.AbstractParquetScanBatchCreator;
+import org.apache.hadoop.conf.Configuration;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class HiveDrillNativeParquetScanBatchCreator extends AbstractParquetScanBatchCreator implements BatchCreator<HiveDrillNativeParquetRowGroupScan> {
+
+  @Override
+  public CloseableRecordBatch getBatch(ExecutorFragmentContext context, HiveDrillNativeParquetRowGroupScan rowGroupScan, List<RecordBatch> children) throws ExecutionSetupException {
+    Preconditions.checkArgument(children.isEmpty());
+    OperatorContext oContext = context.newOperatorContext(rowGroupScan);
+    return getBatch(context, rowGroupScan, oContext);
+  }
+
+  @Override
+  protected AbstractDrillFileSystemManager getDrillFileSystemCreator(OperatorContext operatorContext, OptionManager optionManager) {
+    return new HiveDrillNativeParquetDrillFileSystemManager(operatorContext);
+  }
+
+  /**
+   * Caches file system per path and returns file system from cache if it exists there.
+   * Creates only non-tracking file systems.
+   */
+  private class HiveDrillNativeParquetDrillFileSystemManager extends AbstractDrillFileSystemManager {
+
+    private final Map<String, DrillFileSystem> fileSystems;
+
+    HiveDrillNativeParquetDrillFileSystemManager(OperatorContext operatorContext) {
+      super(operatorContext);
+      this.fileSystems = new HashMap<>();
+    }
+
+    @Override
+    protected DrillFileSystem get(Configuration config, String path) throws ExecutionSetupException {
+      DrillFileSystem fs = fileSystems.get(path);
+      if (fs == null) {
+        try {
+          fs = operatorContext.newNonTrackingFileSystem(config);
+        } catch (IOException e) {
+          throw new ExecutionSetupException(String.format("Failed to create non-tracking DrillFileSystem: %s", e.getMessage()), e);
+        }
+        fileSystems.put(path, fs);
+      }
+      return fs;
+    }
+  }
+
+}