Proto server reflection

1 files changed, 238 insertions, 0 deletions

diff --git a/test/cpp/util/proto_reflection_descriptor_database.cc b/test/cpp/util/proto_reflection_descriptor_database.cc
new file mode 100644
index 0000000000..c2ed93c12b
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+++ b/test/cpp/util/proto_reflection_descriptor_database.cc
@@ -0,0 +1,238 @@
+/*
+ *
+ * Copyright 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 "proto_reflection_descriptor_database.h"
+
+#include <vector>
+
+#include <grpc/support/log.h>
+
+namespace grpc {
+
+ProtoReflectionDescriptorDatabase::ProtoReflectionDescriptorDatabase(
+    std::unique_ptr<reflection::v1alpha::ServerReflection::Stub> stub)
+    : stub_(std::move(stub)) {}
+
+ProtoReflectionDescriptorDatabase::ProtoReflectionDescriptorDatabase(
+    std::shared_ptr<grpc::Channel> channel)
+    : stub_(reflection::v1alpha::ServerReflection::NewStub(channel)) {}
+
+ProtoReflectionDescriptorDatabase::~ProtoReflectionDescriptorDatabase() {}
+
+bool ProtoReflectionDescriptorDatabase::FindFileByName(
+    const string& filename, google::protobuf::FileDescriptorProto* output) {
+  if (cached_db_.FindFileByName(filename, output)) {
+    return true;
+  }
+
+  if (known_files_.find(filename) != known_files_.end()) {
+    return false;
+  }
+
+  ClientContext ctx;
+  reflection::v1alpha::FileNameRequest request;
+  request.set_filename(filename);
+  reflection::v1alpha::FileDescriptorProtoResponse response;
+
+  Status status = stub_->GetFileByName(&ctx, request, &response);
+  if (status.ok()) {
+    // const google::protobuf::FileDescriptorProto* file_proto =
+    //     response.mutable_file_descriptor_proto();
+    const google::protobuf::FileDescriptorProto file_proto =
+        ParseFileDescriptorProtoResponse(&response);
+    known_files_.insert(file_proto.name());
+    cached_db_.Add(file_proto);
+  } else if (status.error_code() == StatusCode::NOT_FOUND) {
+    gpr_log(GPR_INFO, "NOT_FOUND from server for FindFileByName(%s)",
+            filename.c_str());
+  } else {
+    gpr_log(GPR_INFO,
+            "Error on FindFileByName(%s)\n\tError code: %d\n"
+            "\tError Message: %s",
+            filename.c_str(), status.error_code(),
+            status.error_message().c_str());
+  }
+
+  return cached_db_.FindFileByName(filename, output);
+}
+
+bool ProtoReflectionDescriptorDatabase::FindFileContainingSymbol(
+    const string& symbol_name, google::protobuf::FileDescriptorProto* output) {
+  if (cached_db_.FindFileContainingSymbol(symbol_name, output)) {
+    return true;
+  }
+
+  if (missing_symbols_.find(symbol_name) != missing_symbols_.end()) {
+    return false;
+  }
+
+  ClientContext ctx;
+  reflection::v1alpha::SymbolRequest request;
+  request.set_symbol(symbol_name);
+  reflection::v1alpha::FileDescriptorProtoResponse response;
+
+  Status status = stub_->GetFileContainingSymbol(&ctx, request, &response);
+  if (status.ok()) {
+    const google::protobuf::FileDescriptorProto file_proto =
+        ParseFileDescriptorProtoResponse(&response);
+    if (known_files_.find(file_proto.name()) == known_files_.end()) {
+      known_files_.insert(file_proto.name());
+      cached_db_.Add(file_proto);
+    }
+  } else if (status.error_code() == StatusCode::NOT_FOUND) {
+    missing_symbols_.insert(symbol_name);
+    gpr_log(GPR_INFO, "NOT_FOUND from server for FindFileContainingSymbol(%s)",
+            symbol_name.c_str());
+  } else {
+    gpr_log(GPR_INFO,
+            "Error on FindFileContainingSymbol(%s)\n"
+            "\tError code: %d\n\tError Message: %s",
+            symbol_name.c_str(), status.error_code(),
+            status.error_message().c_str());
+  }
+
+  return cached_db_.FindFileContainingSymbol(symbol_name, output);
+}
+
+bool ProtoReflectionDescriptorDatabase::FindFileContainingExtension(
+    const string& containing_type, int field_number,
+    google::protobuf::FileDescriptorProto* output) {
+  if (cached_db_.FindFileContainingExtension(containing_type, field_number,
+                                             output)) {
+    return true;
+  }
+
+  if (missing_extensions_.find(containing_type) != missing_extensions_.end() &&
+      missing_extensions_[containing_type].find(field_number) !=
+          missing_extensions_[containing_type].end()) {
+    gpr_log(GPR_INFO, "nested map.");
+    return false;
+  }
+
+  ClientContext ctx;
+  reflection::v1alpha::ExtensionRequest request;
+  request.set_containing_type(containing_type);
+  request.set_extension_number(field_number);
+  reflection::v1alpha::FileDescriptorProtoResponse response;
+
+  Status status = stub_->GetFileContainingExtension(&ctx, request, &response);
+  if (status.ok()) {
+    const google::protobuf::FileDescriptorProto file_proto =
+        ParseFileDescriptorProtoResponse(&response);
+    if (known_files_.find(file_proto.name()) == known_files_.end()) {
+      known_files_.insert(file_proto.name());
+      cached_db_.Add(file_proto);
+    }
+  } else if (status.error_code() == StatusCode::NOT_FOUND) {
+    if (missing_extensions_.find(containing_type) ==
+        missing_extensions_.end()) {
+      missing_extensions_[containing_type] = {};
+    }
+    missing_extensions_[containing_type].insert(field_number);
+    gpr_log(GPR_INFO,
+            "NOT_FOUND from server for FindFileContainingExtension(%s, %d)",
+            containing_type.c_str(), field_number);
+  } else {
+    gpr_log(GPR_INFO,
+            "Error on FindFileContainingExtension(%s, %d)\n"
+            "\tError code: %d\n\tError Message: %s",
+            containing_type.c_str(), field_number, status.error_code(),
+            status.error_message().c_str());
+  }
+
+  return cached_db_.FindFileContainingExtension(containing_type, field_number,
+                                                output);
+}
+
+bool ProtoReflectionDescriptorDatabase::FindAllExtensionNumbers(
+    const string& extendee_type, std::vector<int>* output) {
+  if (cached_extension_numbers_.find(extendee_type) !=
+      cached_extension_numbers_.end()) {
+    *output = cached_extension_numbers_[extendee_type];
+    return true;
+  }
+
+  ClientContext ctx;
+  reflection::v1alpha::TypeRequest request;
+  request.set_type(extendee_type);
+  reflection::v1alpha::ExtensionNumberResponse response;
+
+  Status status = stub_->GetAllExtensionNumbers(&ctx, request, &response);
+  if (status.ok()) {
+    auto number = response.extension_number();
+    *output = std::vector<int>(number.begin(), number.end());
+    cached_extension_numbers_[extendee_type] = *output;
+    return true;
+  } else if (status.error_code() == StatusCode::NOT_FOUND) {
+    gpr_log(GPR_INFO, "NOT_FOUND from server for FindAllExtensionNumbers(%s)",
+            extendee_type.c_str());
+  } else {
+    gpr_log(GPR_INFO,
+            "Error on FindAllExtensionNumbersExtension(%s)\n"
+            "\tError code: %d\n\tError Message: %s",
+            extendee_type.c_str(), status.error_code(),
+            status.error_message().c_str());
+  }
+  return false;
+}
+
+bool ProtoReflectionDescriptorDatabase::GetServices(
+    std::vector<std::string>* output) {
+  ClientContext ctx;
+  reflection::v1alpha::EmptyRequest request;
+  reflection::v1alpha::ListServiceResponse response;
+
+  Status status = stub_->ListService(&ctx, request, &response);
+  if (status.ok()) {
+    for (int i = 0; i < response.services_size(); ++i) {
+      (*output).push_back(response.services(i));
+    }
+    return true;
+  } else {
+    gpr_log(GPR_INFO,
+            "Error on GetServices()\n\tError code: %d\n"
+            "\tError Message: %s",
+            status.error_code(), status.error_message().c_str());
+  }
+  return false;
+}
+
+const google::protobuf::FileDescriptorProto
+ProtoReflectionDescriptorDatabase::ParseFileDescriptorProtoResponse(
+    reflection::v1alpha::FileDescriptorProtoResponse* response) {
+  google::protobuf::FileDescriptorProto file_desc_proto;
+  file_desc_proto.ParseFromString(response->file_descriptor_proto());
+  return file_desc_proto;
+}
+
+}  // namespace grpc