content: /**
   * 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 org.apache.aurora.scheduler.discovery;
  
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  import java.net.InetSocketAddress;
  import java.util.List;
  
  import javax.inject.Qualifier;
  
  import com.google.inject.Key;
  import com.google.inject.TypeLiteral;
  
  import org.apache.zookeeper.data.ACL;
  
  /**
   * Useful constants for Guice modules that provide or consume service discovery configuration
   * bindings.
   */
  public final class ServiceDiscoveryBindings {
  
    /**
     * Indicates a binding for ZooKeeper configuration data.
     */
    @Qualifier
    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER})
    public @interface ZooKeeper { }
  
    /**
     * A binding key for the ZooKeeper cluster endpoints.
     */
    public static final Key<Iterable<InetSocketAddress>> ZOO_KEEPER_CLUSTER_KEY =
        Key.get(new TypeLiteral<Iterable<InetSocketAddress>>() { }, ZooKeeper.class);
  
    /**
     * A binding key for the ZooKeeper ACL to use when creating nodes.
     */
    static final Key<List<ACL>> ZOO_KEEPER_ACL_KEY =
        Key.get(new TypeLiteral<List<ACL>>() { }, ZooKeeper.class);
  
    private ServiceDiscoveryBindings() {
      // Utility.
    }
  }
  