Add standard stream logger

[ric-plt/sdl.git] / src / stdstreamlogger.cpp

diff --git a/src/stdstreamlogger.cpp b/src/stdstreamlogger.cpp
new file mode 100755 (executable)
index 0000000..dc25e29
--- /dev/null
+++ b/src/stdstreamlogger.cpp
@@ -0,0 +1,115 @@
+/*
+   Copyright (c) 2018-2019 Nokia.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+#include "private/stdstreamlogger.hpp"
+#include <iostream>
+#include <sstream>
+#include <syslog.h>
+#include <boost/iostreams/stream.hpp>
+#include <boost/iostreams/concepts.hpp>
+
+using namespace shareddatalayer;
+
+namespace
+{
+    class Sink: public boost::iostreams::sink
+    {
+    public:
+        Sink(const std::string& prefix, int level): prefix(prefix), level(level) { }
+
+        ~Sink() { }
+
+        std::streamsize write(const char* s, std::streamsize n);
+
+    private:
+        const std::string prefix;
+        const int level;
+    };
+}
+
+std::streamsize Sink::write(const char* s, std::streamsize n)
+{
+    if (level < LOG_ERR)
+        std::cout << prefix << ": " << std::string(s, n);
+    else
+        std::cerr << prefix << ": " << std::string(s, n);
+    return n;
+}
+
+StdStreamLogger::StdStreamLogger(const std::string& prefix):
+    prefix(prefix)
+{
+}
+
+StdStreamLogger::~StdStreamLogger()
+{
+}
+
+std::ostream& StdStreamLogger::emerg()
+{
+    if (osEmerg == nullptr)
+        osEmerg.reset(new boost::iostreams::stream<Sink>(Sink(prefix, LOG_EMERG)));
+    return *osEmerg;
+}
+
+std::ostream& StdStreamLogger::alert()
+{
+    if (osAlert == nullptr)
+        osAlert.reset(new boost::iostreams::stream<Sink>(Sink(prefix, LOG_ALERT)));
+    return *osAlert;
+}
+
+std::ostream& StdStreamLogger::crit()
+{
+    if (osCrit == nullptr)
+        osCrit.reset(new boost::iostreams::stream<Sink>(Sink(prefix, LOG_CRIT)));
+    return *osCrit;
+}
+
+std::ostream& StdStreamLogger::error()
+{
+    if (osError == nullptr)
+        osError.reset(new boost::iostreams::stream<Sink>(Sink(prefix, LOG_ERR)));
+    return *osError;
+}
+
+std::ostream& StdStreamLogger::warning()
+{
+    if (osWarning == nullptr)
+        osWarning.reset(new boost::iostreams::stream<Sink>(Sink(prefix, LOG_WARNING)));
+    return *osWarning;
+}
+
+std::ostream& StdStreamLogger::notice()
+{
+    if (osNotice == nullptr)
+        osNotice.reset(new boost::iostreams::stream<Sink>(Sink(prefix, LOG_NOTICE)));
+    return *osNotice;
+}
+
+std::ostream& StdStreamLogger::info()
+{
+    if (osInfo == nullptr)
+        osInfo.reset(new boost::iostreams::stream<Sink>(Sink(prefix, LOG_INFO)));
+    return *osInfo;
+}
+
+std::ostream& StdStreamLogger::debug()
+{
+    if (osDebug == nullptr)
+        osDebug.reset(new boost::iostreams::stream<Sink>(Sink(prefix, LOG_DEBUG)));
+    return *osDebug;
+}