Use custom qclient logger, set to kWarn

CHANGELOG.md

@@ -2,7 +2,12 @@
 All notable changes to this project will be documented in this file.
 
 ## Unreleased
-- Updated rocksdb to v5.17.2
+- Updated rocksdb dependency to v5.17.2
+- Improved output of ``quarkdb-checkpoint`` command. The generated directory can now be used directly
+to spin-up a full QuarkDB node. Command aliased to ``raft-checkpoint``.
+- Light refactoring, more widespread use of ``std::string_view``, which paves the
+way for certain performance optimizations in the future.
+- Removed flood of "attempting connection to .. " messages when some node is unavailable
 
 ## 0.3.4 (2018-10-09)
 - Updated rocksdb dependency to v5.15.10.

src/raft/RaftTalker.cc

@@ -26,6 +26,7 @@
 #include "RaftContactDetails.hh"
 #include "RaftTimeouts.hh"
 #include "../Version.hh"
+#include <qclient/Logger.hh>
 
 using namespace quarkdb;
 
@@ -65,6 +66,18 @@ private:
 };
 
 
+class QuarkDBLogger : public qclient::Logger {
+public:
+
+  QuarkDBLogger() {
+    logLevel = qclient::LogLevel::kWarn;
+  }
+
+  void print(LogLevel level, int line, const std::string &file, const std::string &msg) override {
+      ___log("QCLIENT (" << logLevelToString(level) << "): " << msg);
+  }
+};
+
 RaftTalker::RaftTalker(const RaftServer &server_, const RaftContactDetails &contactDetails)
 : server(server_) {
 
@@ -73,6 +86,7 @@ RaftTalker::RaftTalker(const RaftServer &server_, const RaftContactDetails &cont
   opts.transparentRedirects = false;
   opts.retryStrategy = qclient::RetryStrategy::NoRetries();
   opts.backpressureStrategy = qclient::BackpressureStrategy::Default();
+  opts.logger.reset(new QuarkDBLogger());
 
   opts.chainHmacHandshake(contactDetails.getPassword());
   opts.chainHandshake(std::unique_ptr<Handshake>(new RaftHandshake(contactDetails)));