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src/sql/dtl/ob_dtl_linked_buffer.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include "ob_dtl_msg.h"
+#include "ob_dtl_linked_buffer.h"
+
+using namespace oceanbase::common;
+
+namespace oceanbase {
+namespace sql {
+namespace dtl {
+
+OB_SERIALIZE_MEMBER(ObDtlDfoKey, server_id_, px_sequence_id_, qc_id_, dfo_id_);
+
+int ObDtlLinkedBuffer::deserialize_msg_header(
+    const ObDtlLinkedBuffer& buffer, ObDtlMsgHeader& header, bool keep_pos /*= false*/)
+{
+  int ret = OB_SUCCESS;
+  const char* buf = buffer.buf();
+  int64_t size = buffer.size();
+  int64_t& pos = buffer.pos();
+  int64_t old_pos = buffer.pos();
+  if (pos == size) {
+    ret = OB_ITER_END;
+  } else if (OB_FAIL(serialization::decode(buf, size, pos, header))) {
+    SQL_DTL_LOG(WARN, "decode DTL message header fail", K(size), K(pos), K(ret));
+  } else if (header.type_ >= static_cast<int16_t>(ObDtlMsgType::MAX)) {
+    ret = OB_INVALID_ARGUMENT;
+    SQL_DTL_LOG(WARN, "channel has received message with unknown type", K(header), K(size), K(pos));
+  }
+  if (keep_pos) {
+    buffer.pos() = old_pos;
+  }
+  return ret;
+}
+
+}  // namespace dtl
+}  // namespace sql
+}  // namespace oceanbase