Initial checkin of gRPC to third_party/

third_party/grpc/src/cpp/client/client_context.cc

+/*
+ *
+ * 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.
+ *
+ */
+
+#include <grpc++/client_context.h>
+
+#include <grpc/compression.h>
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/string_util.h>
+#include <grpc++/security/credentials.h>
+#include <grpc++/server_context.h>
+#include <grpc++/support/time.h>
+
+#include "src/core/channel/compress_filter.h"
+#include "src/cpp/common/create_auth_context.h"
+
+namespace grpc {
+
+class DefaultGlobalClientCallbacks GRPC_FINAL
+    : public ClientContext::GlobalCallbacks {
+ public:
+  ~DefaultGlobalClientCallbacks() GRPC_OVERRIDE {}
+  void DefaultConstructor(ClientContext* context) GRPC_OVERRIDE {}
+  void Destructor(ClientContext* context) GRPC_OVERRIDE {}
+};
+
+static DefaultGlobalClientCallbacks g_default_client_callbacks;
+static ClientContext::GlobalCallbacks* g_client_callbacks =
+    &g_default_client_callbacks;
+
+ClientContext::ClientContext()
+    : initial_metadata_received_(false),
+      call_(nullptr),
+      call_canceled_(false),
+      deadline_(gpr_inf_future(GPR_CLOCK_REALTIME)),
+      propagate_from_call_(nullptr) {
+  g_client_callbacks->DefaultConstructor(this);
+}
+
+ClientContext::~ClientContext() {
+  if (call_) {
+    grpc_call_destroy(call_);
+  }
+  g_client_callbacks->Destructor(this);
+}
+
+std::unique_ptr<ClientContext> ClientContext::FromServerContext(
+    const ServerContext& context, PropagationOptions options) {
+  std::unique_ptr<ClientContext> ctx(new ClientContext);
+  ctx->propagate_from_call_ = context.call_;
+  ctx->propagation_options_ = options;
+  return ctx;
+}
+
+void ClientContext::AddMetadata(const grpc::string& meta_key,
+                                const grpc::string& meta_value) {
+  send_initial_metadata_.insert(std::make_pair(meta_key, meta_value));
+}
+
+void ClientContext::set_call(grpc_call* call,
+                             const std::shared_ptr<Channel>& channel) {
+  grpc::unique_lock<grpc::mutex> lock(mu_);
+  GPR_ASSERT(call_ == nullptr);
+  call_ = call;
+  channel_ = channel;
+  if (creds_ && !creds_->ApplyToCall(call_)) {
+    grpc_call_cancel_with_status(call, GRPC_STATUS_CANCELLED,
+                                 "Failed to set credentials to rpc.", nullptr);
+  }
+  if (call_canceled_) {
+    grpc_call_cancel(call_, nullptr);
+  }
+}
+
+void ClientContext::set_compression_algorithm(
+    grpc_compression_algorithm algorithm) {
+  char* algorithm_name = nullptr;
+  if (!grpc_compression_algorithm_name(algorithm, &algorithm_name)) {
+    gpr_log(GPR_ERROR, "Name for compression algorithm '%d' unknown.",
+            algorithm);
+    abort();
+  }
+  GPR_ASSERT(algorithm_name != nullptr);
+  AddMetadata(GRPC_COMPRESS_REQUEST_ALGORITHM_KEY, algorithm_name);
+}
+
+std::shared_ptr<const AuthContext> ClientContext::auth_context() const {
+  if (auth_context_.get() == nullptr) {
+    auth_context_ = CreateAuthContext(call_);
+  }
+  return auth_context_;
+}
+
+void ClientContext::TryCancel() {
+  grpc::unique_lock<grpc::mutex> lock(mu_);
+  if (call_) {
+    grpc_call_cancel(call_, nullptr);
+  } else {
+    call_canceled_ = true;
+  }
+}
+
+grpc::string ClientContext::peer() const {
+  grpc::string peer;
+  if (call_) {
+    char* c_peer = grpc_call_get_peer(call_);
+    peer = c_peer;
+    gpr_free(c_peer);
+  }
+  return peer;
+}
+
+void ClientContext::SetGlobalCallbacks(GlobalCallbacks* client_callbacks) {
+  GPR_ASSERT(g_client_callbacks == &g_default_client_callbacks);
+  GPR_ASSERT(client_callbacks != NULL);
+  GPR_ASSERT(client_callbacks != &g_default_client_callbacks);
+  g_client_callbacks = client_callbacks;
+}
+
+}  // namespace grpc