content: /*
   * Copyright (C) 2012 Facebook, Inc.
   *
   * 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 io.airlift.drift.server;
  
  import io.airlift.drift.codec.metadata.ThriftServiceMetadata;
  import io.airlift.drift.server.stats.MethodInvocationStatsFactory;
  import io.airlift.drift.transport.MethodMetadata;
  
  import java.util.Objects;
  import java.util.Optional;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentMap;
  
  import static java.util.Objects.requireNonNull;
  
  public class TestingMethodInvocationStatsFactory
          implements MethodInvocationStatsFactory
  {
      private final ConcurrentMap<Key, TestingMethodInvocationStat> stats = new ConcurrentHashMap<>();
  
      public TestingMethodInvocationStat getStat(String serviceName, Optional<String> qualifier, String methodName)
      {
          return stats.get(new Key(serviceName, qualifier, methodName));
      }
  
      @Override
      public TestingMethodInvocationStat getStat(ThriftServiceMetadata serviceMetadata, Optional<String> qualifier, MethodMetadata metadata)
      {
          return stats.computeIfAbsent(new Key(serviceMetadata.getName(), qualifier, metadata.getName()), key -> new TestingMethodInvocationStat());
      }
  
      private static class Key
      {
          private final String serviceName;
          private final Optional<String> qualifier;
          private final String methodName;
  
          public Key(String serviceName, Optional<String> qualifier, String methodName)
          {
              this.serviceName = requireNonNull(serviceName, "serviceName is null");
              this.qualifier = requireNonNull(qualifier, "qualifier is null");
              this.methodName = requireNonNull(methodName, "methodName is null");
          }
  
          @Override
          public boolean equals(Object o)
          {
              if (this == o) {
                  return true;
              }
              if (o == null || getClass() != o.getClass()) {
                  return false;
              }
              Key key = (Key) o;
              return Objects.equals(serviceName, key.serviceName) &&
                      Objects.equals(qualifier, key.qualifier) &&
                      Objects.equals(methodName, key.methodName);
          }
  
          @Override
          public int hashCode()
          {
              return Objects.hash(serviceName, qualifier, methodName);
          }
  
          @Override
          public String toString()
          {
              return serviceName +
                      qualifier.map(name -> "." + name).orElse("") +
                      "." + methodName;
          }
      }
  }
  