Add classes: Logic, App_t. Add journal loging support

Class Logic has only dbus callbacks implemetation (package-manager,
connman), beside it it's empty implementation.

Verification:
1) Build cert-checker with debug, and install on emulator.
2) Run cert-checker - do it in emulator UI console (not via ssh).
3) On other console in emulator UI run command:
   journalctl -f | grep cert-checker
   - to see the logs.
4) On third console turn on and off offline mode on device:
   /usr/sbin/connmanctl enable offline
   /usr/sbin/connmanctl disable offline
5) You should see logs from cert-checker in journal
6) Install any app to check if package-manager signal works in cert-checker:
   pkgcmd -i -t wgt -p /usr/share/widget_demo/go.wgt -q
7) Check if logs are present.

Change-Id: Ic7d6fc4f47ca9ced18744ad8a77f8516b75304e3

2 files changed, 135 insertions, 0 deletions

diff --git a/src/log/log.cpp b/src/log/log.cpp
new file mode 100644
index 0000000..ced0fe9
--- /dev/null
+++ b/src/log/log.cpp
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ *    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.
+ */
+/**
+ * @file        log.cpp
+ * @author      Janusz Kozerski <j.kozerski@samsung.com>
+ * @brief       This file declares class for ask user window
+ */
+
+#include <stdexcept>
+#include <systemd/sd-journal.h>
+
+void JournalLog(int logLevel,
+                const char *message,
+                const char *fileName,
+                int line,
+                const char *function)
+{
+    try {
+        sd_journal_send("PRIORITY=%d", logLevel,
+                "CODE_FILE=%s", fileName,
+                "CODE_FUNC=%s", function,
+                "CODE_LINE=%d", line,
+                // add file, line & function info to log message
+                "MESSAGE=[%s:%d] %s(): %s", fileName, line, function, message,
+                NULL);
+    } catch (const std::out_of_range&) {
+        sd_journal_send(
+                "PRIORITY=%d", LOG_ERR,
+                "CODE_FILE=%s", fileName,
+                "CODE_FUNC=%s", function,
+                "CODE_LINE=%d", line,
+                // add file, line & function info to log message
+                "MESSAGE=[%s:%d] %s(): Unsupported log level %d", fileName, line, function, logLevel,
+                NULL);
+    }
+}
diff --git a/src/log/log.h b/src/log/log.h
new file mode 100644
index 0000000..d4efcdc
--- /dev/null
+++ b/src/log/log.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ *    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.
+ */
+/**
+ * @file        log.h
+ * @author      Janusz Kozerski <j.kozerski@samsung.com>
+ * @brief       Project log framework - logs into journal
+ */
+
+#include <sstream>
+#include <systemd/sd-journal.h>
+
+#ifndef CERT_CHECKER_LOG_H
+#define CERT_CHECKER_LOG_H
+
+void JournalLog(int logLevel, const char *message, const char *fileName,
+                int line, const char *function);
+
+/*
+ * Replacement low overhead null logging class
+ */
+class NullStream
+{
+    public:
+        NullStream() {}
+
+        template <typename T>
+        NullStream& operator<<(const T&)
+        {
+            return *this;
+        }
+};
+
+/* avoid warnings about unused variables */
+#define DPL_MACRO_DUMMY_LOGGING(message, level) \
+    do {                                        \
+        NullStream ns;                          \
+        ns << message;                          \
+    } while (0)
+
+#define CERT_CHECKER_LOG(message, level)         \
+do                                               \
+{                                                \
+    std::ostringstream platformLog;              \
+    platformLog << message;                      \
+    JournalLog(level,                            \
+               platformLog.str().c_str(),        \
+               __FILE__,                         \
+               __LINE__,                         \
+               __FUNCTION__);                    \
+} while (0)
+
+/* Errors must be always logged. */
+#define  LogError(message)          \
+    CERT_CHECKER_LOG(message, LOG_ERR)
+
+#ifdef BUILD_TYPE_DEBUG
+    #define LogDebug(message)       \
+        CERT_CHECKER_LOG(message, LOG_DEBUG)
+    #define LogInfo(message)        \
+        CERT_CHECKER_LOG(message, LOG_INFO)
+    #define LogWarning(message)     \
+        CERT_CHECKER_LOG(message, LOG_WARNING)
+#else
+    #define LogDebug(message)       \
+        DPL_MACRO_DUMMY_LOGGING(message, LOG_DEBUG)
+    #define LogInfo(message)        \
+        DPL_MACRO_DUMMY_LOGGING(message, LOG_INFO)
+    #define LogWarning(message)     \
+        DPL_MACRO_DUMMY_LOGGING(message, LOG_WARNING)
+#endif // BUILD_TYPE_DEBUG
+
+#endif //CERT_CHECKER_LOG_H
+