Employee Facade Service

.gitignore

+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

.mvn/wrapper/maven-wrapper.properties

+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.4/apache-maven-3.8.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar

mvnw.cmd

+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%

pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.6.7</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.nisum.poc.facade</groupId>
+	<artifactId>EmployeeServiceFacade</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>EmployeeServiceFacade</name>
+	<description>Demo project for Spring Boot</description>
+	<properties>
+		<java.version>1.8</java.version>
+		<spring-cloud.version>2021.0.2</spring-cloud.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-webflux</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>io.projectreactor</groupId>
+			<artifactId>reactor-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-dependencies</artifactId>
+				<version>${spring-cloud.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<excludes>
+						<exclude>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok</artifactId>
+						</exclude>
+					</excludes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

src/main/java/com/nisum/poc/facade/EmployeeServiceFacadeApplication.java

+package com.nisum.poc.facade;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.cloud.client.loadbalancer.LoadBalanced;
+import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.reactive.function.client.WebClient;
+
+@SpringBootApplication
+@EnableEurekaClient
+public class EmployeeServiceFacadeApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(EmployeeServiceFacadeApplication.class, args);
+	}
+
+	@Bean(value = "empWebClient")
+	@LoadBalanced
+	public WebClient.Builder getEmpWebClient(){
+		return WebClient.builder().baseUrl("lb://employee-ws/employee/");
+	}
+
+	@Bean(value = "depWebClient")
+	@LoadBalanced
+	public WebClient.Builder getDepWebClient(){
+		return WebClient.builder().baseUrl("lb://department-ws/department/");
+	}
+
+	@Bean(value = "projWebClient")
+	@LoadBalanced
+	public WebClient.Builder getProjWebClient(){
+		return WebClient.builder().baseUrl("lb://project-ws/project/");
+	}
+}

src/main/java/com/nisum/poc/facade/client/IDepartmentClient.java

+package com.nisum.poc.facade.client;
+
+import com.nisum.poc.facade.response.DepartmentDetails;
+
+public interface IDepartmentClient {
+
+    public DepartmentDetails fetchDepartmentById(Long deptId);
+}

src/main/java/com/nisum/poc/facade/client/IEmployeeClient.java

+package com.nisum.poc.facade.client;
+
+import com.nisum.poc.facade.response.EmployeeDetails;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+public interface IEmployeeClient {
+
+    public Flux<EmployeeDetails> fetchAllEmployee();
+
+    public Mono<EmployeeDetails> findEmployeeDetails(Long empId);
+}

src/main/java/com/nisum/poc/facade/client/IProjectClient.java

+package com.nisum.poc.facade.client;
+
+public interface IProjectClient {
+}

src/main/java/com/nisum/poc/facade/client/impl/DepartmentClient.java

+package com.nisum.poc.facade.client.impl;
+
+import com.nisum.poc.facade.client.IDepartmentClient;
+import com.nisum.poc.facade.response.DepartmentDetails;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Repository;
+import org.springframework.web.reactive.function.client.WebClient;
+
+@Repository
+public class DepartmentClient implements IDepartmentClient {
+
+
+    private WebClient.Builder employeeClient;
+
+    @Autowired
+    public DepartmentClient(@Qualifier("depWebClient") WebClient.Builder employeeClient) {
+        this.employeeClient = employeeClient;
+    }
+
+    @Override
+    public DepartmentDetails fetchDepartmentById(Long deptId) {
+        return null;
+    }
+}

src/main/java/com/nisum/poc/facade/client/impl/EmployeeClient.java

+package com.nisum.poc.facade.client.impl;
+
+import com.nisum.poc.facade.client.IEmployeeClient;
+import com.nisum.poc.facade.response.EmployeeDetails;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Repository;
+import org.springframework.web.reactive.function.client.WebClient;
+import org.springframework.web.util.UriBuilder;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+@Repository
+public class EmployeeClient implements IEmployeeClient {
+
+    private WebClient.Builder employeeClient;
+
+    @Autowired
+    public EmployeeClient(@Qualifier("empWebClient") WebClient.Builder employeeClient) {
+        this.employeeClient = employeeClient;
+    }
+
+    @Override
+    public Flux<EmployeeDetails> fetchAllEmployee() {
+        return employeeClient.build().get().uri("all").retrieve().bodyToFlux(EmployeeDetails.class);
+    }
+
+    @Override
+    public Mono<EmployeeDetails> findEmployeeDetails(Long empId) {
+
+        return employeeClient.build().get()
+                .uri(uriBuilder -> uriBuilder.path("/v1/{empId}/details").build(empId))
+                .retrieve().bodyToMono(EmployeeDetails.class);
+    }
+}

src/main/java/com/nisum/poc/facade/client/impl/ProjectClient.java

+package com.nisum.poc.facade.client.impl;
+
+import com.nisum.poc.facade.client.IProjectClient;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class ProjectClient implements IProjectClient {
+}

src/main/java/com/nisum/poc/facade/controller/EmployeeFacadeController.java

+package com.nisum.poc.facade.controller;
+
+import com.nisum.poc.facade.response.EmployeeDetails;
+import com.nisum.poc.facade.service.IEmployeeService;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+@RestController
+@RequestMapping(value = "/facade")
+public class EmployeeFacadeController {
+
+    private IEmployeeService employeeService;
+
+    public EmployeeFacadeController(IEmployeeService employeeService){
+        this.employeeService = employeeService;
+    }
+
+    @GetMapping(value = "/v1/all/employee")
+    public Flux<EmployeeDetails> fetchAllEmployee(){
+        return employeeService.fetchEmployeeDetails();
+    }
+
+    /**
+     *
+     * @param empId
+     * @return
+     */
+    @GetMapping(value = "/v1/{empId}/employee")
+    public Mono<EmployeeDetails> fetchEmployeeById(@PathVariable Long empId){
+        return employeeService.fetchEmployeeById(empId);
+    }
+}

src/main/java/com/nisum/poc/facade/response/DepartmentDetails.java

+package com.nisum.poc.facade.response;
+
+public class DepartmentDetails {
+
+    private Long departmentId;
+    private String departmentName;
+}

src/main/java/com/nisum/poc/facade/response/EmployeeDetails.java

+package com.nisum.poc.facade.response;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class EmployeeDetails {
+
+    private Long employeeId;
+    private String firstName;
+    private String lastName;
+    private String email;
+    private String phoneNumber;
+}

src/main/java/com/nisum/poc/facade/response/ProjectDetails.java

+package com.nisum.poc.facade.response;
+
+public class ProjectDetails {
+
+    private Long projectId;
+    private String projectName;
+}

src/main/java/com/nisum/poc/facade/service/IEmployeeService.java

+package com.nisum.poc.facade.service;
+
+import com.nisum.poc.facade.response.EmployeeDetails;
+import org.springframework.web.bind.annotation.PathVariable;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+public interface IEmployeeService {
+
+    public Flux<EmployeeDetails> fetchEmployeeDetails();
+
+    public Mono<EmployeeDetails> fetchEmployeeById(Long empId);
+
+}

src/main/java/com/nisum/poc/facade/service/impl/EmployeeService.java

+package com.nisum.poc.facade.service.impl;
+
+import com.nisum.poc.facade.client.IEmployeeClient;
+import com.nisum.poc.facade.response.EmployeeDetails;
+import com.nisum.poc.facade.service.IEmployeeService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+@Service
+public class EmployeeService implements IEmployeeService {
+
+    private IEmployeeClient employeeClient;
+
+    @Autowired
+    public EmployeeService (IEmployeeClient employeeClient){
+        this.employeeClient = employeeClient;
+
+    }
+    @Override
+    public Flux<EmployeeDetails> fetchEmployeeDetails() {
+        return employeeClient.fetchAllEmployee();
+    }
+
+    @Override
+    public Mono<EmployeeDetails> fetchEmployeeById(Long empId) {
+        Mono<EmployeeDetails> employeeDetails = employeeClient.findEmployeeDetails(empId);
+        return null;
+    }
+}

src/main/resources/application.properties

+server.port=${PORT:0}
+spring.application.name=facade-ws
+eureka.client.serviceUrl.defaultZone=http://localhost:8010/eureka/
+
+#api-gateway is calling the microservices using username of the system which you need to call using ip address of the system
+eureka.instance.prefer-ip-address=true
+
+
+
+

src/test/java/com/nisum/poc/facade/EmployeeServiceFacadeApplicationTests.java

+package com.nisum.poc.facade;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class EmployeeServiceFacadeApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}