Import code from internal repository to git

java/com/google/domain/registry/tools/BigqueryCommandUtilities.java

@@ -0,0 +1,54 @@
+// Copyright 2016 Google Inc. All Rights Reserved.
+//
+// Licensed 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 com.google.domain.registry.tools;
+
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.domain.registry.bigquery.BigqueryConnection.DestinationTable;
+
+import java.util.concurrent.ExecutionException;
+
+/** Container class for static utility methods for Bigquery commands. */
+final class BigqueryCommandUtilities {
+
+  /**
+   * Handler that takes a DestinationTable future and waits on its completion, printing generic
+   * success/failure messages and wrapping any exception thrown in a TableCreationException.
+   */
+  static void handleTableCreation(
+      String tableDescription,
+      ListenableFuture<DestinationTable> tableFuture) throws TableCreationException {
+    System.err.printf("Creating %s...\n", tableDescription);
+    try {
+      DestinationTable table = tableFuture.get();
+      System.err.printf(" - Success: created %s.\n", table.getStringReference());
+    } catch (Exception e) {
+      Throwable error = e;
+      if (e instanceof ExecutionException) {
+        error = e.getCause();
+      }
+      String errorMessage =
+          String.format("Failed to create %s: %s", tableDescription, error.getMessage());
+      System.err.printf(" - %s\n", errorMessage);
+      throw new TableCreationException(errorMessage, error);
+    }
+  }
+
+  /** Exception thrown if any error occurs during a table creation stage. */
+  static class TableCreationException extends Exception {
+    TableCreationException(String message, Throwable cause) {
+      super(message, cause);
+    }
+  }
+}