Exemplo n.º 1
0
TEST(StringPiece, SuffixEmpty) {
  StringPiece a;
  EXPECT_TRUE(a.endsWith(""));
  EXPECT_FALSE(a.endsWith("a"));
  EXPECT_FALSE(a.endsWith('a'));
  EXPECT_TRUE(a.removeSuffix(""));
  EXPECT_EQ("", a);
  EXPECT_FALSE(a.removeSuffix("a"));
  EXPECT_EQ("", a);
  EXPECT_FALSE(a.removeSuffix('a'));
  EXPECT_EQ("", a);
}
Exemplo n.º 2
0
  void parseMessage(StringPiece msg, size_t* threadID, size_t* messageIndex) {
    // Validate and strip off the message prefix and suffix
    constexpr StringPiece prefix{"thread "};
    if (!msg.startsWith(prefix)) {
      throw std::runtime_error("bad message prefix");
    }
    msg.advance(prefix.size());
    if (!msg.endsWith(kMsgSuffix)) {
      throw std::runtime_error("bad message suffix");
    }
    msg.subtract(kMsgSuffix.size());

    // Parse then strip off the thread index
    auto threadIDEnd = msg.find(' ');
    if (threadIDEnd == StringPiece::npos) {
      throw std::runtime_error("no middle found");
    }
    *threadID = folly::to<size_t>(msg.subpiece(0, threadIDEnd));
    msg.advance(threadIDEnd);

    // Validate that the middle of the message is what we expect,
    // then strip it off
    constexpr StringPiece middle{" message "};
    if (!msg.startsWith(middle)) {
      throw std::runtime_error("bad message middle");
    }
    msg.advance(middle.size());

    // Parse the message index
    *messageIndex = folly::to<size_t>(msg);
  }
Exemplo n.º 3
0
  void messageReceived(StringPiece msg) {
    if (msg.endsWith(" log messages discarded: "
                     "logging faster than we can write")) {
      auto discardCount = folly::to<size_t>(msg.subpiece(0, msg.find(' ')));
      XLOG(DBG3, "received discard notification: ", discardCount);
      numDiscarded_ += discardCount;
      ++discardEventsSeen_;
      return;
    }

    size_t threadID = 0;
    size_t messageIndex = 0;
    try {
      parseMessage(msg, &threadID, &messageIndex);
    } catch (const std::exception& ex) {
      ++numUnableToParse_;
      XLOG(ERR, "unable to parse log message: ", msg);
      return;
    }

    auto& data = perThreadReadData_[threadID];
    data.numMessagesRead++;
    if (messageIndex > data.lastId) {
      data.lastId = messageIndex;
    } else {
      ++numOutOfOrder_;
      XLOG(ERR) << "received out-of-order messages from writer " << threadID
                << ": " << messageIndex << " received after " << data.lastId;
    }
  }