content: /*
   * 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.bookkeeper.clients.impl.internal;
  
  import com.google.common.annotations.VisibleForTesting;
  import io.grpc.Status;
  import io.grpc.StatusException;
  import io.grpc.StatusRuntimeException;
  import java.util.concurrent.CompletableFuture;
  import java.util.function.Predicate;
  import java.util.function.Supplier;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bookkeeper.clients.impl.internal.api.RootRangeClient;
  import org.apache.bookkeeper.common.util.Backoff;
  import org.apache.bookkeeper.common.util.OrderedScheduler;
  import org.apache.bookkeeper.common.util.Retries;
  import org.apache.bookkeeper.stream.proto.NamespaceConfiguration;
  import org.apache.bookkeeper.stream.proto.NamespaceProperties;
  import org.apache.bookkeeper.stream.proto.StreamConfiguration;
  import org.apache.bookkeeper.stream.proto.StreamProperties;
  
  /**
   * A root range client wrapper with retries.
   */
  @Slf4j
  class RootRangeClientImplWithRetries implements RootRangeClient {
  
      @VisibleForTesting
      static final Predicate<Throwable> ROOT_RANGE_CLIENT_RETRY_PREDICATE =
          cause -> shouldRetryOnException(cause);
  
      private static boolean shouldRetryOnException(Throwable cause) {
          log.error("Reason for the failure ", cause);
          if (cause instanceof StatusRuntimeException || cause instanceof StatusException) {
              Status status;
              if (cause instanceof StatusException) {
                  status = ((StatusException) cause).getStatus();
              } else {
                  status = ((StatusRuntimeException) cause).getStatus();
              }
              switch (status.getCode()) {
                  case INVALID_ARGUMENT:
                  case ALREADY_EXISTS:
                  case PERMISSION_DENIED:
                  case UNAUTHENTICATED:
                      return false;
                  default:
                      return true;
              }
          } else if (cause instanceof RuntimeException) {
              return false;
          } else {
              // storage level exceptions
              return false;
          }
      }
  
      private final RootRangeClient client;
      private final Backoff.Policy backoffPolicy;
      private final OrderedScheduler scheduler;
  
      RootRangeClientImplWithRetries(RootRangeClient client,
                                     Backoff.Policy backoffPolicy,
                                     OrderedScheduler scheduler) {
          this.client = client;
          this.backoffPolicy = backoffPolicy;
          this.scheduler = scheduler;
      }
  
      private <T> CompletableFuture<T> runRpcWithRetries(
              Supplier<CompletableFuture<T>> futureSupplier) {
          return Retries.run(
              backoffPolicy.toBackoffs(),
              ROOT_RANGE_CLIENT_RETRY_PREDICATE,
              futureSupplier,
              scheduler);
      }
  
      @Override
      public CompletableFuture<NamespaceProperties> createNamespace(String namespace,
                                                                    NamespaceConfiguration nsConf) {
          return runRpcWithRetries(() -> client.createNamespace(namespace, nsConf));
      }
  
      @Override
      public CompletableFuture<Boolean> deleteNamespace(String namespace) {
          return runRpcWithRetries(() -> client.deleteNamespace(namespace));
      }
  
      @Override
      public CompletableFuture<NamespaceProperties> getNamespace(String namespace) {
          return runRpcWithRetries(() -> client.getNamespace(namespace));
      }
  
      @Override
      public CompletableFuture<StreamProperties> createStream(String nsName,
                                                              String streamName,
                                                              StreamConfiguration streamConf) {
          return runRpcWithRetries(() ->
              client.createStream(nsName, streamName, streamConf));
      }
  
      @Override
      public CompletableFuture<Boolean> deleteStream(String nsName, String streamName) {
          return runRpcWithRetries(() ->
              client.deleteStream(nsName, streamName));
      }
  
      @Override
      public CompletableFuture<StreamProperties> getStream(String nsName, String streamName) {
          return runRpcWithRetries(() ->
              client.getStream(nsName, streamName));
      }
  
      @Override
      public CompletableFuture<StreamProperties> getStream(long streamId) {
          return runRpcWithRetries(() ->
              client.getStream(streamId));
      }
  }
  