Move RedisClient functions into DBConnector (sonic-net#382)

* Move RedisClient functions into DBConnector
* RedisClient redirects all functions to DBConnector
* Remove cpp file
* Remove RedisClient
* Add TODO comment

Author: qiluo-msft

common/Makefile.am

@@ -33,7 +33,6 @@ libswsscommon_la_SOURCES = \
     json.cpp                  \
     producertable.cpp         \
     producerstatetable.cpp    \
-    redisclient.cpp           \
     rediscommand.cpp          \
     redistran.cpp             \
     redisselect.cpp           \

common/dbconnector.cpp

@@ -461,4 +461,165 @@ string DBConnector::getClientName()
     }
 }
 
+int64_t DBConnector::del(const string &key)
+{
+    RedisCommand sdel;
+    sdel.format("DEL %s", key.c_str());
+    RedisReply r(this, sdel, REDIS_REPLY_INTEGER);
+    return r.getContext()->integer;
+}
+
+bool DBConnector::exists(const string &key)
+{
+    RedisCommand rexists;
+    if (key.find_first_of(" \t") != string::npos)
+    {
+        SWSS_LOG_ERROR("EXISTS failed, invalid space or tab in single key: %s", key.c_str());
+        throw runtime_error("EXISTS failed, invalid space or tab in single key");
+    }
+    rexists.format("EXISTS %s", key.c_str());
+    RedisReply r(this, rexists, REDIS_REPLY_INTEGER);
+    return (r.getContext()->integer > 0);
+}
+
+int64_t DBConnector::hdel(const string &key, const string &field)
+{
+    RedisCommand shdel;
+    shdel.format("HDEL %s %s", key.c_str(), field.c_str());
+    RedisReply r(this, shdel, REDIS_REPLY_INTEGER);
+    return r.getContext()->integer;
+}
+
+int64_t DBConnector::hdel(const std::string &key, const std::vector<std::string> &fields)
+{
+    RedisCommand shdel;
+    shdel.formatHDEL(key, fields);
+    RedisReply r(this, shdel, REDIS_REPLY_INTEGER);
+    return r.getContext()->integer;
+}
+
+void DBConnector::hset(const string &key, const string &field, const string &value)
+{
+    RedisCommand shset;
+    shset.format("HSET %s %s %s", key.c_str(), field.c_str(), value.c_str());
+    RedisReply r(this, shset, REDIS_REPLY_INTEGER);
+}
+
+void DBConnector::set(const string &key, const string &value)
+{
+    RedisCommand sset;
+    sset.format("SET %s %s", key.c_str(), value.c_str());
+    RedisReply r(this, sset, REDIS_REPLY_STATUS);
+}
+
+unordered_map<string, string> DBConnector::hgetall(const string &key)
+{
+    unordered_map<string, string> map;
+    hgetall(key, std::inserter(map, map.end()));
+    return map;
+}
+
+vector<string> DBConnector::keys(const string &key)
+{
+    RedisCommand skeys;
+    skeys.format("KEYS %s", key.c_str());
+    RedisReply r(this, skeys, REDIS_REPLY_ARRAY);
+
+    auto ctx = r.getContext();
+
+    vector<string> list;
+    for (unsigned int i = 0; i < ctx->elements; i++)
+        list.emplace_back(ctx->element[i]->str);
+
+    return list;
+}
+
+int64_t DBConnector::incr(const string &key)
+{
+    RedisCommand sincr;
+    sincr.format("INCR %s", key.c_str());
+    RedisReply r(this, sincr, REDIS_REPLY_INTEGER);
+    return r.getContext()->integer;
+}
+
+int64_t DBConnector::decr(const string &key)
+{
+    RedisCommand sdecr;
+    sdecr.format("DECR %s", key.c_str());
+    RedisReply r(this, sdecr, REDIS_REPLY_INTEGER);
+    return r.getContext()->integer;
+}
+
+shared_ptr<string> DBConnector::get(const string &key)
+{
+    RedisCommand sget;
+    sget.format("GET %s", key.c_str());
+    RedisReply r(this, sget);
+    auto reply = r.getContext();
+
+    if (reply->type == REDIS_REPLY_NIL)
+    {
+        return shared_ptr<string>(NULL);
+    }
+
+    if (reply->type == REDIS_REPLY_STRING)
+    {
+        shared_ptr<string> ptr(new string(reply->str));
+        return ptr;
+    }
+
+    throw runtime_error("GET failed, memory exception");
+}
+
+shared_ptr<string> DBConnector::hget(const string &key, const string &field)
+{
+    RedisCommand shget;
+    shget.format("HGET %s %s", key.c_str(), field.c_str());
+    RedisReply r(this, shget);
+    auto reply = r.getContext();
+
+    if (reply->type == REDIS_REPLY_NIL)
+    {
+        return shared_ptr<string>(NULL);
+    }
+
+    if (reply->type == REDIS_REPLY_STRING)
+    {
+        shared_ptr<string> ptr(new string(reply->str));
+        return ptr;
+    }
+
+    SWSS_LOG_ERROR("HGET failed, reply-type: %d, %s: %s", reply->type, key.c_str(), field.c_str());
+    throw runtime_error("HGET failed, unexpected reply type, memory exception");
+}
+
+int64_t DBConnector::rpush(const string &list, const string &item)
+{
+    RedisCommand srpush;
+    srpush.format("RPUSH %s %s", list.c_str(), item.c_str());
+    RedisReply r(this, srpush, REDIS_REPLY_INTEGER);
+    return r.getContext()->integer;
+}
+
+shared_ptr<string> DBConnector::blpop(const string &list, int timeout)
+{
+    RedisCommand sblpop;
+    sblpop.format("BLPOP %s %d", list.c_str(), timeout);
+    RedisReply r(this, sblpop);
+    auto reply = r.getContext();
+
+    if (reply->type == REDIS_REPLY_NIL)
+    {
+        return shared_ptr<string>(NULL);
+    }
+
+    if (reply->type == REDIS_REPLY_STRING)
+    {
+        shared_ptr<string> ptr(new string(reply->str));
+        return ptr;
+    }
+
+    throw runtime_error("GET failed, memory exception");
+}
+
 }

common/dbconnector.h

@@ -5,8 +5,11 @@
 #include <vector>
 #include <unordered_map>
 #include <utility>
+#include <memory>
 
 #include <hiredis/hiredis.h>
+#include "rediscommand.h"
+#include "redisreply.h"
 #define EMPTY_NAMESPACE std::string()
 
 namespace swss {
@@ -101,12 +104,70 @@ class DBConnector
 
     std::string getClientName();
 
+    int64_t del(const std::string &key);
+
+    bool exists(const std::string &key);
+
+    int64_t hdel(const std::string &key, const std::string &field);
+
+    int64_t hdel(const std::string &key, const std::vector<std::string> &fields);
+
+    std::unordered_map<std::string, std::string> hgetall(const std::string &key);
+
+    template <typename OutputIterator>
+    void hgetall(const std::string &key, OutputIterator result);
+
+    std::vector<std::string> keys(const std::string &key);
+
+    void set(const std::string &key, const std::string &value);
+
+    void hset(const std::string &key, const std::string &field, const std::string &value);
+
+    template<typename InputIterator>
+    void hmset(const std::string &key, InputIterator start, InputIterator stop);
+
+    std::shared_ptr<std::string> get(const std::string &key);
+
+    std::shared_ptr<std::string> hget(const std::string &key, const std::string &field);
+
+    int64_t incr(const std::string &key);
+
+    int64_t decr(const std::string &key);
+
+    int64_t rpush(const std::string &list, const std::string &item);
+
+    std::shared_ptr<std::string> blpop(const std::string &list, int timeout);
+
 private:
     redisContext *m_conn;
     int m_dbId;
     std::string m_dbName;
     std::string m_namespace;
 };
 
+template<typename OutputIterator>
+void DBConnector::hgetall(const std::string &key, OutputIterator result)
+{
+    RedisCommand sincr;
+    sincr.format("HGETALL %s", key.c_str());
+    RedisReply r(this, sincr, REDIS_REPLY_ARRAY);
+
+    auto ctx = r.getContext();
+
+    for (unsigned int i = 0; i < ctx->elements; i += 2)
+    {
+        *result = std::make_pair(ctx->element[i]->str, ctx->element[i+1]->str);
+        ++result;
+    }
+}
+
+template<typename InputIterator>
+void DBConnector::hmset(const std::string &key, InputIterator start, InputIterator stop)
+{
+    RedisCommand shmset;
+    shmset.formatHMSET(key, start, stop);
+    RedisReply r(this, shmset, REDIS_REPLY_STATUS);
+}
+
 }
 #endif

common/logger.cpp

@@ -92,14 +92,13 @@ void Logger::linkToDbWithOutput(const std::string &dbName, const PriorityChangeN
     // Initialize internal DB with observer
     logger.m_settingChangeObservers.insert(std::make_pair(dbName, std::make_pair(prioNotify, outputNotify)));
     DBConnector db("LOGLEVEL_DB", 0);
-    RedisClient redisClient(&db);
-    auto keys = redisClient.keys("*");
+    auto keys = db.keys("*");
 
     std::string key = dbName + ":" + dbName;
     std::string prio, output;
     bool doUpdate = false;
-    auto prioPtr = redisClient.hget(key, DAEMON_LOGLEVEL);
-    auto outputPtr = redisClient.hget(key, DAEMON_LOGOUTPUT);
+    auto prioPtr = db.hget(key, DAEMON_LOGLEVEL);
+    auto outputPtr = db.hget(key, DAEMON_LOGOUTPUT);
 
     if ( prioPtr == nullptr )
     {

common/loglevel.cpp

@@ -108,8 +108,7 @@ int main(int argc, char **argv)
     }
 
     DBConnector db("LOGLEVEL_DB", 0);
-    RedisClient redisClient(&db);
-    auto keys = redisClient.keys("*");
+    auto keys = db.keys("*");
     for (auto& key : keys)
     {
         size_t colonPos = key.find(':');
@@ -136,7 +135,7 @@ int main(int argc, char **argv)
         for (const auto& key : keys)
         {
             const auto redis_key = std::string(key).append(":").append(key);
-            auto level = redisClient.hget(redis_key, DAEMON_LOGLEVEL);
+            auto level = db.hget(redis_key, DAEMON_LOGLEVEL);
             if (nullptr == level)
             {
                 std::cerr << std::left << std::setw(30) << key << "Unknown log level" << std::endl;