mv com/google/domain/registry google/registry

This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.

java/google/registry/bigquery/BigqueryFactory.java

@@ -0,0 +1,167 @@
+// Copyright 2016 The Domain Registry Authors. 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.bigquery;
+
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.collect.Sets.newConcurrentHashSet;
+import static com.google.domain.registry.util.FormattingLogger.getLoggerForCallerClass;
+
+import com.google.api.client.extensions.appengine.http.UrlFetchTransport;
+import com.google.api.client.googleapis.extensions.appengine.auth.oauth2.AppIdentityCredential;
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.HttpTransport;
+import com.google.api.client.json.JsonFactory;
+import com.google.api.client.json.jackson2.JacksonFactory;
+import com.google.api.services.bigquery.Bigquery;
+import com.google.api.services.bigquery.BigqueryScopes;
+import com.google.api.services.bigquery.model.Dataset;
+import com.google.api.services.bigquery.model.DatasetReference;
+import com.google.api.services.bigquery.model.Table;
+import com.google.api.services.bigquery.model.TableFieldSchema;
+import com.google.api.services.bigquery.model.TableReference;
+import com.google.api.services.bigquery.model.TableSchema;
+import com.google.common.collect.ImmutableList;
+import com.google.domain.registry.util.FormattingLogger;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import javax.inject.Inject;
+
+/** Factory for creating {@link Bigquery} connections. */
+public class BigqueryFactory {
+
+  private static final FormattingLogger logger = getLoggerForCallerClass();
+
+  // Cross-request caches to avoid unnecessary RPCs.
+  private static Set<String> knownExistingDatasets = newConcurrentHashSet();
+  private static Set<String> knownExistingTables = newConcurrentHashSet();
+
+  @Inject Map<String, ImmutableList<TableFieldSchema>> bigquerySchemas;
+  @Inject Subfactory subfactory;
+  @Inject BigqueryFactory() {}
+
+  /** This class is broken out solely so that it can be mocked inside of tests. */
+  static class Subfactory {
+
+    @Inject Subfactory() {}
+
+    public Bigquery create(
+        String applicationName,
+        HttpTransport transport,
+        JsonFactory jsonFactory,
+        HttpRequestInitializer httpRequestInitializer) {
+      return new Bigquery.Builder(transport, jsonFactory, httpRequestInitializer)
+          .setApplicationName(applicationName)
+          .build();
+    }
+  }
+
+  /** Returns a new connection to BigQuery. */
+  public Bigquery create(
+      String applicationName,
+      HttpTransport transport,
+      JsonFactory jsonFactory,
+      HttpRequestInitializer httpRequestInitializer) {
+    return subfactory.create(applicationName, transport, jsonFactory, httpRequestInitializer);
+  }
+
+  /**
+   * Returns a new connection to Bigquery, first ensuring that the given dataset exists in the
+   * project with the given id, creating it if required.
+   */
+  public Bigquery create(String projectId, String datasetId) throws IOException {
+    Bigquery bigquery = create(
+        getClass().getSimpleName(),
+        new UrlFetchTransport(),
+        new JacksonFactory(),
+        new AppIdentityCredential(BigqueryScopes.all()));
+
+    // Note: it's safe for multiple threads to call this as the dataset will only be created once.
+    if (!knownExistingDatasets.contains(datasetId)) {
+      ensureDataset(bigquery, projectId, datasetId);
+      knownExistingDatasets.add(datasetId);
+    }
+
+    return bigquery;
+  }
+
+  /**
+   * Returns a new connection to Bigquery, first ensuring that the given dataset and table exist in
+   * project with the given id, creating them if required.
+   */
+  public Bigquery create(String projectId, String datasetId, String tableId)
+      throws IOException {
+    Bigquery bigquery = create(projectId, datasetId);
+    checkArgument(bigquerySchemas.containsKey(tableId), "Unknown table ID: %s", tableId);
+
+    if (!knownExistingTables.contains(tableId)) {
+      ensureTable(
+          bigquery,
+          new TableReference()
+              .setDatasetId(datasetId)
+              .setProjectId(projectId)
+              .setTableId(tableId),
+            bigquerySchemas.get(tableId));
+      knownExistingTables.add(tableId);
+    }
+
+    return bigquery;
+  }
+
+  /**
+   * Ensures the dataset exists by trying to create it. Note that it's not appreciably cheaper
+   * to check for dataset existence than it is to try to create it and check for exceptions.
+   */
+  // Note that these are not static so they can be mocked for testing.
+  private void ensureDataset(Bigquery bigquery, String projectId, String datasetId)
+      throws IOException {
+    try {
+      bigquery.datasets()
+          .insert(projectId,
+              new Dataset().setDatasetReference(
+                  new DatasetReference()
+                      .setProjectId(projectId)
+                      .setDatasetId(datasetId)))
+          .execute();
+    } catch (IOException e) {
+      // Swallow errors about a duplicate dataset, and throw any other ones.
+      if (!BigqueryJobFailureException.create(e).getReason().equals("duplicate")) {
+        throw e;
+      }
+    }
+  }
+
+  /** Ensures the table exists in Bigquery. */
+  private void ensureTable(Bigquery bigquery, TableReference table, List<TableFieldSchema> schema)
+      throws IOException {
+    try {
+      bigquery.tables().insert(table.getProjectId(), table.getDatasetId(), new Table()
+          .setSchema(new TableSchema().setFields(schema))
+          .setTableReference(table))
+          .execute();
+      logger.infofmt("Created BigQuery table %s:%s.%s", table.getProjectId(), table.getDatasetId(),
+          table.getTableId());
+    } catch (IOException e) {
+      // Swallow errors about a table that exists, and throw any other ones.
+      if (!BigqueryJobFailureException.create(e).getReason().equals("duplicate")) {
+        throw e;
+      }
+    }
+  }
+}