diff --git a/src/commons/logger/core/config.ts b/src/commons/logger/core/config.ts
new file mode 100644
index 0000000..51264af
--- /dev/null
+++ b/src/commons/logger/core/config.ts
@@ -0,0 +1,6 @@
+import { LoggerLevel } from './type';
+
+export class LoggerConfig {
+  level: LoggerLevel;
+  serverLogLevel: LoggerLevel;
+}
diff --git a/src/commons/logger/core/index.ts b/src/commons/logger/core/index.ts
new file mode 100644
index 0000000..40a47eb
--- /dev/null
+++ b/src/commons/logger/core/index.ts
@@ -0,0 +1,3 @@
+export * from './config';
+export * from './token';
+export * from './type';
diff --git a/src/commons/logger/core/token.ts b/src/commons/logger/core/token.ts
new file mode 100644
index 0000000..6d8f313
--- /dev/null
+++ b/src/commons/logger/core/token.ts
@@ -0,0 +1,4 @@
+import { Inject, Injectable, InjectionToken } from '@angular/core';
+import { LoggerLevel } from './type';
+
+export const LOGGER_LEVEL = new InjectionToken<LoggerLevel>('LoggerLevel');
diff --git a/src/commons/logger/core/type.ts b/src/commons/logger/core/type.ts
new file mode 100644
index 0000000..72d4473
--- /dev/null
+++ b/src/commons/logger/core/type.ts
@@ -0,0 +1,26 @@
+export enum LoggerLevel {
+  TRACE = 0,
+  DEBUG,
+  INFO,
+  LOG,
+  WARN,
+  ERROR,
+  OFF,
+}
+
+export const LoggerLevelName = [
+  'TRACE',
+  'DEBUG',
+  'INFO',
+  'LOG',
+  'WARN',
+  'ERROR',
+  'OFF'
+];
+
+export interface ServerLoggingParameter {
+  level: string;
+  message: string;
+  addtional?: string;
+  timestamp: Date;
+}
diff --git a/src/commons/logger/logger.module.ts b/src/commons/logger/logger.module.ts
new file mode 100644
index 0000000..4918285
--- /dev/null
+++ b/src/commons/logger/logger.module.ts
@@ -0,0 +1,39 @@
+import {
+  NgModule,
+  ModuleWithProviders,
+} from '@angular/core';
+import { CommonModule } from '@angular/common';
+
+
+
+
+
+
+
+@NgModule({
+})
+export class LoggerRootModule { }
+
+@NgModule({
+})
+export class LoggerFeatureModule { }
+
+@NgModule({
+})
+export class LoggerModule {
+  static forRoot(reducers: any): ModuleWithProviders {
+    return {
+      ngModule: LoggerRootModule,
+      providers: [
+      ],
+    };
+  }
+
+  static forFeature(featureName: string, reducers?: any): ModuleWithProviders {
+    return {
+      ngModule: LoggerFeatureModule,
+      providers: [
+      ],
+    };
+  }
+}
diff --git a/src/commons/logger/service/logger.service.ts b/src/commons/logger/service/logger.service.ts
new file mode 100644
index 0000000..1081ea8
--- /dev/null
+++ b/src/commons/logger/service/logger.service.ts
@@ -0,0 +1,93 @@
+import {
+  LoggerConfig,
+  LoggerLevel,
+} from '../core';
+
+
+export abstract class LoggerService {
+
+  public constructor(
+    private readonly config: LoggerConfig
+  ) {
+
+  }
+
+  public trace(message, ...additional: any[]): void {
+    this._log(LoggerLevel.TRACE, message, additional);
+  }
+
+  public debug(message, ...additional: any[]): void {
+    this._log(LoggerLevel.DEBUG, message, additional);
+  }
+
+  public info(message, ...additional: any[]): void {
+    this._log(LoggerLevel.INFO, message, additional);
+  }
+
+  public log(message, ...additional: any[]): void {
+    this._log(LoggerLevel.LOG, message, additional);
+  }
+
+  public warn(message, ...additional: any[]): void {
+    this._log(LoggerLevel.WARN, message, additional);
+  }
+
+  public error(message, ...additional: any[]): void {
+    this._log(LoggerLevel.ERROR, message, additional);
+  }
+
+  private _timestamp(): string {
+    return new Date().toISOString();
+  }
+
+  private _log(level: LoggerLevel, logOnServer: boolean, message, additional: any[] = []): void {
+    if (!message) {
+      return;
+    }
+
+    // Allow logging on server even if client log level is off
+    // if (logOnServer) {
+    //   this._logOnServer(level, message, additional);
+    // }
+
+    // if no message or the log level is less than the environ
+    if (level < this.config.level) {
+      return;
+    }
+
+    try {
+      message = typeof message === 'string' ? message
+        : JSON.stringify(message, null, 2);
+    } catch (e) {
+      additional = [message, ...additional];
+      message = 'The provided "message" value could not be parsed with JSON.stringify().';
+    }
+
+    // Coloring doesn't work in IE
+    // if (this._isIE) {
+    //   return this._logIE(level, message, additional);
+    // }
+
+    // const color = this._getColor(level);
+
+    // console.log(`%c${this._timestamp()} [${Levels[level]}]`, `color:${color}`, message, ...additional);
+  }
+
+  private _getColor(level: LoggerLevel): 'blue' | 'teal' | 'gray' | 'red' | undefined {
+    switch (level) {
+      case LoggerLevel.TRACE:
+        return 'blue';
+      case LoggerLevel.DEBUG:
+        return 'teal';
+      case LoggerLevel.INFO:
+      case LoggerLevel.LOG:
+        return 'gray';
+      case LoggerLevel.WARN:
+      case LoggerLevel.ERROR:
+        return 'red';
+      case LoggerLevel.OFF:
+      default:
+        return;
+    }
+  }
+}
diff --git a/src/commons/logger/store/logger.action.ts b/src/commons/logger/store/logger.action.ts
new file mode 100644
index 0000000..15b419d
--- /dev/null
+++ b/src/commons/logger/store/logger.action.ts
@@ -0,0 +1,20 @@
+import { Action } from '@ngrx/store';
+
+import {
+  LoggerLevel,
+  ServerLoggingParameter,
+} from '../core';
+
+export enum ActionType {
+  ServerLogging = '[@@LOGGER] ServerLogging',
+}
+
+export class ServerLogging implements Action {
+  readonly type = ActionType.ServerLogging;
+
+  constructor(public payload: ServerLoggingParameter) {}
+}
+
+export type Actions =
+  | ServerLogging
+;
diff --git a/src/packages/core/rpc/protocol/json/RPCClientJSONCodec.ts b/src/packages/core/rpc/protocol/json/RPCClientJSONCodec.ts
index d6886a4..cb0ba5c 100644
--- a/src/packages/core/rpc/protocol/json/RPCClientJSONCodec.ts
+++ b/src/packages/core/rpc/protocol/json/RPCClientJSONCodec.ts
@@ -10,13 +10,13 @@ import {
 
 export interface ClientNotification {
   method: string;
-  params?: any[];
+  params?: string[];
 }
 
 export interface ClientRequest {
   jsonrpc: string;
   method: string;
-  params?: any[];
+  params?: string[];
   id?: number;
 }
 
@@ -29,10 +29,12 @@ export interface ClientResponse {
 
 export class RPCClientJSONCodec extends RPCClientCodec {
   public request(method: string, args: any[], id?: number): any {
+    const params = convertParamsToStringArray(args);
+
     const req: ClientRequest = {
       jsonrpc: '2.0',
       method: method,
-      params: args,
+      params: 0 === params.length ? null : params,
       id: id,
     };
     return JSON.stringify(req);
@@ -48,6 +50,35 @@ export class RPCClientJSONCodec extends RPCClientCodec {
   }
 }
 
+function convertParamsToStringArray(args: any[]): string[] | undefined {
+  const values: string[] = [];
+
+  if (undefined === args || null === args || 0 === args.length) {
+    return values;
+  }
+
+  for (let indexI = 0; indexI < args.length; indexI++) {
+    const arg = args[indexI];
+
+    switch (typeof arg) {
+      case 'boolean':
+      case 'number': // enum
+        values.push(String(arg));
+        break;
+      case 'string':
+        values.push(arg);
+        break;
+      case 'object':  // array, map
+        values.push(JSON.stringify(arg));
+        break;
+      default:
+        throw new Error(`Not supported type[${typeof arg}]`);
+    }
+  }
+
+  return values;
+}
+
 export class RPCClientJSONResponseCodec extends RPCClientResponseCodec {
   public constructor(private _res: ClientResponse) {
     super();