DRILL-540: Allow querying hive views in Drill

1. Added DrillHiveViewTable which allows construction of DrillViewTable based
   on Hive metadata
2. Added initialization of DrillHiveViewTable in HiveSchemaFactory
3. Extracted conversion of Hive data types from DrillHiveTable
   to HiveToRelDataTypeConverter
4. Removed throwing of UnsupportedOperationException from HiveStoragePlugin
5. Added TestHiveViewsSupport and authorization tests
6. Added closeSilently() method to AutoCloseables
closes #1559

1 files changed, 22 insertions, 0 deletions

diff --git a/common/src/main/java/org/apache/drill/common/AutoCloseables.java b/common/src/main/java/org/apache/drill/common/AutoCloseables.java
index 8ca715e6d..4cdbded2d 100644
--- a/common/src/main/java/org/apache/drill/common/AutoCloseables.java
+++ b/common/src/main/java/org/apache/drill/common/AutoCloseables.java
@@ -19,12 +19,18 @@ package org.apache.drill.common;
 
 import java.util.Arrays;
 import java.util.Collection;
+import java.util.Objects;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Utilities for AutoCloseable classes.
  */
 public class AutoCloseables {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(AutoCloseables.class);
+
   public interface Closeable extends AutoCloseable {
     @Override
     void close();
@@ -92,4 +98,20 @@ public class AutoCloseables {
       throw topLevelException;
     }
   }
+
+  /**
+   * Close all without caring about thrown exceptions
+   * @param closeables - array containing auto closeables
+   */
+  public static void closeSilently(AutoCloseable... closeables) {
+    Arrays.stream(closeables).filter(Objects::nonNull)
+        .forEach(target -> {
+          try {
+            target.close();
+          } catch (Exception e) {
+            LOGGER.warn(String.format("Exception was thrown while closing auto closeable: %s", target), e);
+          }
+        });
+  }
+
 }