code: /*
   * Copyright (c) 2019 the Eclipse Milo Authors
   *
   * This program and the accompanying materials are made
   * available under the terms of the Eclipse Public License 2.0
   * which is available at https://www.eclipse.org/legal/epl-2.0/
   *
   * SPDX-License-Identifier: EPL-2.0
   */
  
  package org.eclipse.milo.opcua.sdk.client.api;
  
  import java.util.concurrent.CompletableFuture;
  
  import org.eclipse.milo.opcua.sdk.client.AddressSpace;
  import org.eclipse.milo.opcua.sdk.client.api.config.OpcUaClientConfig;
  import org.eclipse.milo.opcua.sdk.client.api.services.AttributeServices;
  import org.eclipse.milo.opcua.sdk.client.api.services.MethodServices;
  import org.eclipse.milo.opcua.sdk.client.api.services.MonitoredItemServices;
  import org.eclipse.milo.opcua.sdk.client.api.services.NodeManagementServices;
  import org.eclipse.milo.opcua.sdk.client.api.services.SubscriptionServices;
  import org.eclipse.milo.opcua.sdk.client.api.services.ViewServices;
  import org.eclipse.milo.opcua.sdk.client.api.subscriptions.UaSubscriptionManager;
  import org.eclipse.milo.opcua.sdk.client.subscriptions.OpcUaSubscriptionManager;
  import org.eclipse.milo.opcua.stack.core.serialization.UaRequestMessage;
  import org.eclipse.milo.opcua.stack.core.serialization.UaResponseMessage;
  
  public interface UaClient extends AttributeServices,
      MethodServices, MonitoredItemServices, NodeManagementServices, SubscriptionServices, ViewServices {
  
      /**
       * @return the {@link OpcUaClientConfig} for this client.
       */
      OpcUaClientConfig getConfig();
  
      /**
       * Connect to the configured endpoint.
       *
       * @return a {@link CompletableFuture} holding this client instance.
       */
      CompletableFuture<? extends UaClient> connect();
  
      /**
       * Disconnect from the configured endpoint.
       *
       * @return a {@link CompletableFuture} holding this client instance.
       */
      CompletableFuture<? extends UaClient> disconnect();
  
      /**
       * @return a {@link CompletableFuture} holding the {@link UaSession}.
       */
      CompletableFuture<? extends UaSession> getSession();
  
      /**
       * @return the {@link AddressSpace}.
       */
      AddressSpace getAddressSpace();
  
      /**
       * @return the {@link OpcUaSubscriptionManager} for this client.
       */
      UaSubscriptionManager getSubscriptionManager();
  
      /**
       * Send a {@link UaRequestMessage}.
       *
       * @param request the request to send.
       * @return a {@link CompletableFuture} holding the response.
       */
      <T extends UaResponseMessage> CompletableFuture<T> sendRequest(UaRequestMessage request);
  
  }
  