Add batched logger

src/Makefile.am

@@ -85,6 +85,7 @@ BITCOIN_CORE_H = \
   addrman.h \
   alert.h \
   base58.h \
+  batchedlogger.h \
   bip39.h \
   bip39_english.h \
   blockencodings.h \
@@ -224,6 +225,7 @@ libdash_server_a_SOURCES = \
   addrman.cpp \
   addrdb.cpp \
   alert.cpp \
+  batchedlogger.cpp \
   bloom.cpp \
   blockencodings.cpp \
   chain.cpp \

src/batchedlogger.cpp

@@ -0,0 +1,25 @@
+// Copyright (c) 2018 The Dash Core developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "batchedlogger.h"
+#include "util.h"
+
+CBatchedLogger::CBatchedLogger(const std::string& _header) :
+    header(_header)
+{
+}
+
+CBatchedLogger::~CBatchedLogger()
+{
+    Flush();
+}
+
+void CBatchedLogger::Flush()
+{
+    if (msg.empty()) {
+        return;
+    }
+    LogPrintStr(strprintf("%s:\n%s", header, msg));
+    msg.clear();
+}

src/batchedlogger.h

@@ -0,0 +1,28 @@
+// Copyright (c) 2018 The Dash Core developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef DASH_BATCHEDLOGGER_H
+#define DASH_BATCHEDLOGGER_H
+
+#include "tinyformat.h"
+
+class CBatchedLogger
+{
+private:
+    std::string header;
+    std::string msg;
+public:
+    CBatchedLogger(const std::string& _header);
+    virtual ~CBatchedLogger();
+
+    template<typename... Args>
+    void Printf(const std::string& fmt, const Args&... args)
+    {
+        msg += strprintf(fmt, args...);
+    }
+
+    void Flush();
+};
+
+#endif//DASH_BATCHEDLOGGER_H