fix: handle specific exceptions (#1370)

* Extending BaseService to create BIGQUERY_EXCEPTION_HANDLER with retry

* Replacing EXCEPTION_HANDLER with BIGQUERY_EXCEPTION_HANDLER with retry logic

* Adding retryOn java.net.UnknownHostException

* Adding License Information

* Reverting to EXCEPTION_HANDLER for create method, using BigQueryBaseService.BIGQUERY_EXCEPTION_HANDLER for listDataset

* Using BigQueryBaseService.BIGQUERY_EXCEPTION_HANDLER for query method

* Reverting back to EXCEPTION_HANDLER for create method

* Updating to "Copyright 2021"

* Fixed formatting

* Fixed formatting

Author: prash-mi

google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/BigQueryBaseService.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * 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.cloud.bigquery;
+
+import com.google.cloud.BaseService;
+import com.google.cloud.ExceptionHandler;
+import com.google.cloud.ServiceOptions;
+
+abstract class BigQueryBaseService<OptionsT extends ServiceOptions<?, OptionsT>>
+    extends BaseService {
+
+  protected BigQueryBaseService(ServiceOptions options) {
+    super(options);
+  }
+
+  public static final ExceptionHandler BIGQUERY_EXCEPTION_HANDLER =
+      ExceptionHandler.newBuilder()
+          .abortOn(RuntimeException.class)
+          .retryOn(java.net.ConnectException.class) // retry on Connection Exception
+          .retryOn(java.net.UnknownHostException.class) // retry on UnknownHostException
+          .addInterceptors(EXCEPTION_HANDLER_INTERCEPTOR)
+          .build();
+}

google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/BigQueryImpl.java

@@ -13,7 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package com.google.cloud.bigquery;
 
 import static com.google.cloud.RetryHelper.runWithRetries;
@@ -458,7 +457,7 @@ private static Page<Dataset> listDatasets(
                 }
               },
               serviceOptions.getRetrySettings(),
-              EXCEPTION_HANDLER,
+              BigQueryBaseService.BIGQUERY_EXCEPTION_HANDLER,
               serviceOptions.getClock());
       String cursor = result.x();
       return new PageImpl<>(
@@ -1256,7 +1255,7 @@ public com.google.api.services.bigquery.model.QueryResponse call() {
                 }
               },
               getOptions().getRetrySettings(),
-              EXCEPTION_HANDLER,
+              BigQueryBaseService.BIGQUERY_EXCEPTION_HANDLER,
               getOptions().getClock());
     } catch (RetryHelperException e) {
       throw BigQueryException.translateAndThrow(e);