| #region Copyright notice and license |
| |
| // Copyright 2015-2016, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #endregion |
| |
| using Grpc.Core.Internal; |
| using Grpc.Core.Utils; |
| |
| namespace Grpc.Core |
| { |
| /// <summary> |
| /// Generic base class for client-side stubs. |
| /// </summary> |
| public abstract class ClientBase<T> : ClientBase |
| where T : ClientBase<T> |
| { |
| /// <summary> |
| /// Initializes a new instance of <c>ClientBase</c> class that |
| /// throws <c>NotImplementedException</c> upon invocation of any RPC. |
| /// This constructor is only provided to allow creation of test doubles |
| /// for client classes (e.g. mocking requires a parameterless constructor). |
| /// </summary> |
| protected ClientBase() : base() |
| { |
| } |
| |
| /// <summary> |
| /// Initializes a new instance of <c>ClientBase</c> class. |
| /// </summary> |
| /// <param name="configuration">The configuration.</param> |
| protected ClientBase(ClientBaseConfiguration configuration) : base(configuration) |
| { |
| } |
| |
| /// <summary> |
| /// Initializes a new instance of <c>ClientBase</c> class. |
| /// </summary> |
| /// <param name="channel">The channel to use for remote call invocation.</param> |
| public ClientBase(Channel channel) : base(channel) |
| { |
| } |
| |
| /// <summary> |
| /// Initializes a new instance of <c>ClientBase</c> class. |
| /// </summary> |
| /// <param name="callInvoker">The <c>CallInvoker</c> for remote call invocation.</param> |
| public ClientBase(CallInvoker callInvoker) : base(callInvoker) |
| { |
| } |
| |
| /// <summary> |
| /// Creates a new client that sets host field for calls explicitly. |
| /// gRPC supports multiple "hosts" being served by a single server. |
| /// By default (if a client was not created by calling this method), |
| /// host <c>null</c> with the meaning "use default host" is used. |
| /// </summary> |
| public T WithHost(string host) |
| { |
| var newConfiguration = this.Configuration.WithHost(host); |
| return NewInstance(newConfiguration); |
| } |
| |
| /// <summary> |
| /// Creates a new instance of client from given <c>ClientBaseConfiguration</c>. |
| /// </summary> |
| protected abstract T NewInstance(ClientBaseConfiguration configuration); |
| } |
| |
| /// <summary> |
| /// Base class for client-side stubs. |
| /// </summary> |
| public abstract class ClientBase |
| { |
| readonly ClientBaseConfiguration configuration; |
| readonly CallInvoker callInvoker; |
| |
| /// <summary> |
| /// Initializes a new instance of <c>ClientBase</c> class that |
| /// throws <c>NotImplementedException</c> upon invocation of any RPC. |
| /// This constructor is only provided to allow creation of test doubles |
| /// for client classes (e.g. mocking requires a parameterless constructor). |
| /// </summary> |
| protected ClientBase() : this(new UnimplementedCallInvoker()) |
| { |
| } |
| |
| /// <summary> |
| /// Initializes a new instance of <c>ClientBase</c> class. |
| /// </summary> |
| /// <param name="configuration">The configuration.</param> |
| protected ClientBase(ClientBaseConfiguration configuration) |
| { |
| this.configuration = GrpcPreconditions.CheckNotNull(configuration, "configuration"); |
| this.callInvoker = configuration.CreateDecoratedCallInvoker(); |
| } |
| |
| /// <summary> |
| /// Initializes a new instance of <c>ClientBase</c> class. |
| /// </summary> |
| /// <param name="channel">The channel to use for remote call invocation.</param> |
| public ClientBase(Channel channel) : this(new DefaultCallInvoker(channel)) |
| { |
| } |
| |
| /// <summary> |
| /// Initializes a new instance of <c>ClientBase</c> class. |
| /// </summary> |
| /// <param name="callInvoker">The <c>CallInvoker</c> for remote call invocation.</param> |
| public ClientBase(CallInvoker callInvoker) : this(new ClientBaseConfiguration(callInvoker, null)) |
| { |
| } |
| |
| /// <summary> |
| /// Gets the call invoker. |
| /// </summary> |
| protected CallInvoker CallInvoker |
| { |
| get { return this.callInvoker; } |
| } |
| |
| /// <summary> |
| /// Gets the configuration. |
| /// </summary> |
| internal ClientBaseConfiguration Configuration |
| { |
| get { return this.configuration; } |
| } |
| |
| /// <summary> |
| /// Represents configuration of ClientBase. The class itself is visible to |
| /// subclasses, but contents are marked as internal to make the instances opaque. |
| /// The verbose name of this class was chosen to make name clash in generated code |
| /// less likely. |
| /// </summary> |
| protected internal class ClientBaseConfiguration |
| { |
| readonly CallInvoker undecoratedCallInvoker; |
| readonly string host; |
| |
| internal ClientBaseConfiguration(CallInvoker undecoratedCallInvoker, string host) |
| { |
| this.undecoratedCallInvoker = GrpcPreconditions.CheckNotNull(undecoratedCallInvoker); |
| this.host = host; |
| } |
| |
| internal CallInvoker CreateDecoratedCallInvoker() |
| { |
| return new InterceptingCallInvoker(undecoratedCallInvoker, hostInterceptor: (h) => host); |
| } |
| |
| internal ClientBaseConfiguration WithHost(string host) |
| { |
| GrpcPreconditions.CheckNotNull(host, "host"); |
| return new ClientBaseConfiguration(this.undecoratedCallInvoker, host); |
| } |
| } |
| } |
| } |