intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 88 insertions, 0 deletions

diff --git a/library/cpp/messagebus/protobuf/ybusbuf.cpp b/library/cpp/messagebus/protobuf/ybusbuf.cpp
new file mode 100644
index 0000000000..63415b3737
--- /dev/null
+++ b/library/cpp/messagebus/protobuf/ybusbuf.cpp
@@ -0,0 +1,88 @@
+#include "ybusbuf.h"
+
+#include <library/cpp/messagebus/actor/what_thread_does.h>
+
+#include <google/protobuf/io/coded_stream.h>
+
+using namespace NBus;
+
+TBusBufferProtocol::TBusBufferProtocol(TBusService name, int port)
+    : TBusProtocol(name, port)
+{
+}
+
+TBusBufferProtocol::~TBusBufferProtocol() {
+    for (auto& type : Types) {
+        delete type;
+    }
+}
+
+TBusBufferBase* TBusBufferProtocol::FindType(int type) {
+    for (unsigned i = 0; i < Types.size(); i++) {
+        if (Types[i]->GetHeader()->Type == type) {
+            return Types[i];
+        }
+    }
+    return nullptr;
+}
+
+bool TBusBufferProtocol::IsRegisteredType(unsigned type) {
+    return TypeMask[type >> 5] & (1 << (type & ((1 << 5) - 1)));
+}
+
+void TBusBufferProtocol::RegisterType(TAutoPtr<TBusBufferBase> mess) {
+    ui32 type = mess->GetHeader()->Type;
+    TypeMask[type >> 5] |= 1 << (type & ((1 << 5) - 1));
+
+    Types.push_back(mess.Release());
+}
+
+TArrayRef<TBusBufferBase* const> TBusBufferProtocol::GetTypes() const {
+    return Types;
+}
+
+void TBusBufferProtocol::Serialize(const TBusMessage* mess, TBuffer& data) {
+    TWhatThreadDoesPushPop pp("serialize protobuf message");
+
+    const TBusHeader* header = mess->GetHeader();
+
+    if (!IsRegisteredType(header->Type)) {
+        Y_FAIL("unknown message type: %d", int(header->Type));
+        return;
+    }
+
+    // cast the base from real message
+    const TBusBufferBase* bmess = CheckedCast<const TBusBufferBase*>(mess);
+
+    unsigned size = bmess->GetRecord()->ByteSize();
+    data.Reserve(data.Size() + size);
+
+    char* after = (char*)bmess->GetRecord()->SerializeWithCachedSizesToArray((ui8*)data.Pos());
+    Y_VERIFY(after - data.Pos() == size);
+
+    data.Advance(size);
+}
+
+TAutoPtr<TBusMessage> TBusBufferProtocol::Deserialize(ui16 messageType, TArrayRef<const char> payload) {
+    TWhatThreadDoesPushPop pp("deserialize protobuf message");
+
+    TBusBufferBase* messageTemplate = FindType(messageType);
+    if (messageTemplate == nullptr) {
+        return nullptr;
+        //Y_FAIL("unknown message type: %d", unsigned(messageType));
+    }
+
+    // clone the base
+    TAutoPtr<TBusBufferBase> bmess = messageTemplate->New();
+
+    // Need to override protobuf message size limit
+    // NOTE: the payload size has already been checked against session MaxMessageSize
+    google::protobuf::io::CodedInputStream input(reinterpret_cast<const ui8*>(payload.data()), payload.size());
+    input.SetTotalBytesLimit(payload.size());
+
+    bool ok = bmess->GetRecord()->ParseFromCodedStream(&input) && input.ConsumedEntireMessage();
+    if (!ok) {
+        return nullptr;
+    }
+    return bmess.Release();
+}