116 lines
3.2 KiB
C++
116 lines
3.2 KiB
C++
#include "StarJsonRpc.hpp"
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#include "StarDataStreamDevices.hpp"
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#include "StarLogging.hpp"
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namespace Star {
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JsonRpcInterface::~JsonRpcInterface() {}
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JsonRpc::JsonRpc() {
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m_requestId = 0;
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}
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void JsonRpc::registerHandler(String const& handler, JsonRpcRemoteFunction func) {
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if (m_handlers.contains(handler))
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throw JsonRpcException(strf("Handler by that name already exists '%s'", handler));
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m_handlers.add(handler, move(func));
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}
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void JsonRpc::registerHandlers(JsonRpcHandlers const& handlers) {
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for (auto const& pair : handlers)
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registerHandler(pair.first, pair.second);
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}
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void JsonRpc::removeHandler(String const& handler) {
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if (!m_handlers.contains(handler))
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throw JsonRpcException(strf("No such handler by the name '%s'", handler));
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m_handlers.remove(handler);
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}
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void JsonRpc::clearHandlers() {
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m_handlers.clear();
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}
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RpcPromise<Json> JsonRpc::invokeRemote(String const& handler, Json const& arguments) {
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uint64_t id = m_requestId++;
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JsonObject request;
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m_pending.append(JsonObject{
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{"command", "request"},
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{"id", id},
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{"handler", handler},
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{"arguments", arguments}
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});
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auto pair = RpcPromise<Json>::createPair();
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m_pendingResponse.add(id, pair.second);
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return pair.first;
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}
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bool JsonRpc::sendPending() const {
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return !m_pending.empty();
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}
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ByteArray JsonRpc::send() {
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if (m_pending.empty())
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return {};
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DataStreamBuffer buffer;
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buffer.writeContainer(m_pending);
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m_pending.clear();
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return buffer.takeData();
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}
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void JsonRpc::receive(ByteArray const& inbuffer) {
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if (inbuffer.empty())
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return;
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DataStreamBuffer buffer(inbuffer);
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List<Json> inbound;
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buffer.readContainer(inbound);
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for (auto request : inbound) {
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if (request.get("command") == "request") {
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try {
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auto handlerName = request.getString("handler");
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if (!m_handlers.contains(handlerName))
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throw JsonRpcException(strf("Unknown handler '%s'", handlerName));
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m_pending.append(JsonObject{
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{"command", "response"},
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{"id", request.get("id")},
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{"result", m_handlers[handlerName](request.get("arguments"))}
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});
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} catch (std::exception& e) {
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Logger::error("Exception while handling variant rpc request handler call. %s", outputException(e, false));
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JsonObject response;
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response["command"] = "fail";
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response["id"] = request.get("id");
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m_pending.append(JsonObject{
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{"command", "fail"},
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{"id", request.get("id")}
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});
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}
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} else if (request.get("command") == "response") {
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try {
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auto responseHandler = m_pendingResponse.take(request.getUInt("id"));
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responseHandler.fulfill(request.get("result"));
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} catch (std::exception& e) {
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Logger::error("Exception while handling variant rpc response handler call. %s", outputException(e, true));
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}
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} else if (request.get("command") == "fail") {
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try {
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auto responseHandler = m_pendingResponse.take(request.getUInt("id"));
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responseHandler.fulfill({});
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} catch (std::exception& e) {
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Logger::error("Exception while handling variant rpc failure handler call. %s", outputException(e, true));
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}
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}
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}
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}
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}
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