initial commits

.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

+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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
+#
+#   https://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.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.7/apache-maven-3.8.7-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.1/maven-wrapper-3.1.1.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>2.7.12</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.nisum</groupId>
+	<artifactId>webflux-mongodb-order-management</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>webflux-mongodb-order-management</name>
+	<description>Demo project for Spring Boot</description>
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-webflux</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>
+
+	<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/webfluxmongodbordermanagement/WebfluxMongodbOrderManagementApplication.java

+package com.nisum.webfluxmongodbordermanagement;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class WebfluxMongodbOrderManagementApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(WebfluxMongodbOrderManagementApplication.class, args);
+	}
+
+}

src/main/java/com/nisum/webfluxmongodbordermanagement/controller/OrdersController.java

+package com.nisum.webfluxmongodbordermanagement.controller;
+
+import com.nisum.webfluxmongodbordermanagement.entity.Order;
+import com.nisum.webfluxmongodbordermanagement.service.OrdersService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Flux;
+
+@RestController
+public class OrdersController {
+
+    @Autowired
+    private OrdersService ordersService;
+
+    @GetMapping("/orders")
+    public Flux<Order> getOrders(){return ordersService.getOrders();
+    }
+
+}

src/main/java/com/nisum/webfluxmongodbordermanagement/controller/UserController.java

+package com.nisum.webfluxmongodbordermanagement.controller;
+
+import com.nisum.webfluxmongodbordermanagement.entity.User;
+import com.nisum.webfluxmongodbordermanagement.entity.UserOrders;
+import com.nisum.webfluxmongodbordermanagement.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.util.List;
+
+@RestController
+public class UserController {
+
+    @Autowired
+    UserService userService;
+
+    @GetMapping("/users")
+    public Flux<?> getUsers() {
+        return userService.getUsers();
+    }
+}
+
+
+
+
+
+
+//
+//@PostMapping("/userDetails")
+//    public Mono<User> saveUser(@RequestBody User user){
+//          return   userService.addUser(user);
+//    }
+
+//    @GetMapping("/{userId}")
+//    public Mono<ResponseEntity<User>> getUserWithOrders(@PathVariable String userId) {
+//        return userService.getUserWithOrders(userId)
+//                .map(user -> ResponseEntity.ok(user))
+//                .defaultIfEmpty(ResponseEntity.notFound().build());
+//    }
\ No newline at end of file

src/main/java/com/nisum/webfluxmongodbordermanagement/controller/UserOrdersController.java

+package com.nisum.webfluxmongodbordermanagement.controller;
+
+import com.nisum.webfluxmongodbordermanagement.entity.UserOrders;
+import com.nisum.webfluxmongodbordermanagement.service.UserOrdersService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Flux;
+
+@RestController
+public class UserOrdersController {
+
+    @Autowired
+    private UserOrdersService userOrdersService;
+
+    @GetMapping("/user-orders")
+    public Flux<UserOrders> getAllUsersWithOrders(){
+        Flux<UserOrders> userOrdersFlux = userOrdersService.getAllUsersWithOrders();
+        return userOrdersFlux;
+    }
+
+    @GetMapping("/user-orders/{user_Id}")
+    public Flux<UserOrders> getUserWithOrders(@PathVariable("user_Id") String userId){
+        Flux<UserOrders> userOrdersFlux = userOrdersService.getUsersWithOrders(userId);
+        return userOrdersFlux;
+    }
+
+
+}

src/main/java/com/nisum/webfluxmongodbordermanagement/entity/Order.java

+package com.nisum.webfluxmongodbordermanagement.entity;
+
+import lombok.*;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+import org.springframework.data.mongodb.core.mapping.Field;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Getter
+@Setter
+@Document(collection = "orders")
+public class Order {
+    @Id
+    private String orderId;
+    @Field("user_Id")
+    private String userId;
+    @Field("transaction_Id")
+    private String transactionId;
+    @Field("tracking_Id")
+    private String trackingId;
+    @Field("status")
+    private String status;
+}

src/main/java/com/nisum/webfluxmongodbordermanagement/entity/User.java

+package com.nisum.webfluxmongodbordermanagement.entity;
+
+import lombok.*;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+import org.springframework.data.mongodb.core.mapping.Field;
+
+import java.util.List;
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Setter
+@Getter
+@Document(collection = "user")
+public class User {
+    @Id
+    private String userId;
+    @Field("user_Name")
+    private String userName;
+    @Field("email_Id")
+    private String emailId;
+    @Field("order_Id")
+    private String orderId;
+
+    private List<Order> orders;
+}

src/main/java/com/nisum/webfluxmongodbordermanagement/entity/UserOrders.java

+package com.nisum.webfluxmongodbordermanagement.entity;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Field;
+
+import java.util.List;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class UserOrders {
+
+    @Id
+    private String _id;
+    @Field("user_Id")
+    private String userId;
+    @Field("user_Name")
+    private String userName;
+    @Field("email_Id")
+    private String emailId;
+    @Field("order_Id")
+    private String orderId;
+
+    private List<Order> orders;
+}
\ No newline at end of file

src/main/java/com/nisum/webfluxmongodbordermanagement/repository/OrderRepository.java

+package com.nisum.webfluxmongodbordermanagement.repository;
+
+import com.nisum.webfluxmongodbordermanagement.entity.Order;
+import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface OrderRepository extends ReactiveMongoRepository<Order,String> {
+
+}

src/main/java/com/nisum/webfluxmongodbordermanagement/repository/UserRepository.java

+package com.nisum.webfluxmongodbordermanagement.repository;
+
+import com.nisum.webfluxmongodbordermanagement.entity.User;
+import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends ReactiveMongoRepository<User,String> {
+}

src/main/java/com/nisum/webfluxmongodbordermanagement/service/OrdersService.java

+package com.nisum.webfluxmongodbordermanagement.service;
+
+import com.nisum.webfluxmongodbordermanagement.entity.Order;
+import com.nisum.webfluxmongodbordermanagement.repository.OrderRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+
+@Service
+public class OrdersService {
+
+    @Autowired
+    private OrderRepository orderRepository;
+
+    public Flux<Order> getOrders(){
+      return   orderRepository.findAll();
+    }
+
+}

src/main/java/com/nisum/webfluxmongodbordermanagement/service/UserOrdersService.java

+package com.nisum.webfluxmongodbordermanagement.service;
+
+import com.nisum.webfluxmongodbordermanagement.entity.UserOrders;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.mongodb.core.ReactiveMongoTemplate;
+import org.springframework.data.mongodb.core.aggregation.Aggregation;
+import org.springframework.data.mongodb.core.aggregation.AggregationOperation;
+import org.springframework.data.mongodb.core.aggregation.LookupOperation;
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+
+
+@Service
+public class UserOrdersService {
+
+    @Autowired
+    private ReactiveMongoTemplate reactiveMongoTemplate;
+
+    public Flux<UserOrders> getAllUsersWithOrders() {
+        LookupOperation lookupOperation = LookupOperation.newLookup().
+                from("Orders").
+                localField("user_Id").
+                foreignField("user_Id").
+                as("orders");
+
+        Aggregation aggregation = Aggregation.newAggregation(lookupOperation);
+        return reactiveMongoTemplate.aggregate(aggregation, "user", UserOrders.class);
+    }
+
+    public Flux<UserOrders> getUsersWithOrders(String userId) {
+        LookupOperation lookupOperation = LookupOperation.newLookup().
+                from("Orders").
+                localField("user_Id").
+                foreignField("user_Id").
+                as("orders");
+
+        AggregationOperation match = Aggregation.match(Criteria.where("user_Id").is(userId));
+
+        Aggregation aggregation = Aggregation.newAggregation(lookupOperation, match);
+
+
+        return reactiveMongoTemplate.aggregate(aggregation, "user", UserOrders.class);
+
+
+    }
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+//    @Autowired
+//    // private MongoTemplate mongoTemplate;
+//    ReactiveMongoTemplate mongoTemplate;
+//
+//    @Autowired
+//    UserRepository userRepository;
+//
+//    public UserService(ReactiveMongoTemplate mongoTemplate) {
+//        this.mongoTemplate = mongoTemplate;
+//    }
+//
+//
+//    public Mono<User> addUser(User user){
+//
+//        return userRepository.save(user);
+//    }
+//
+//    public Flux<?> aggregateUserOrders(String userId) {
+//        LookupOperation lookupOperation = LookupOperation.newLookup()
+//                .from("Orders")
+//                .localField("userId")
+//                .foreignField("userId")
+//                .as("orders");
+//
+//
+////        Aggregation aggregation = Aggregation.newAggregation(lookupOperation, Aggregation.match(Criteria.where("userId").is(userId)));
+////        //Flux<Document> results = mongoTemplate.aggregate(aggregation, "User", Document.class);
+//        //Set<UserOrders> users = results.toStream().collect(Collectors.toSet());
+//        //List<UserOrders> result = results.collectList().block();
+//        //log.info("results {} ", result);
+////        Flux<AggregationResults> results = mongoTemplate.aggregate(aggregation, "User", AggregationResults.class)
+////                .map(AggregationResults::getMappedResults);
+////                //.flatMap(1);
+//        //.flatMapIterable(Flux::fromIterable);
+////        //Iterable<Document> orderedTests = (List<Document>) results.collectList().block().getRawResults().get(“results”);
+////        log.info("Obj Size " +results);
+////
+////        return results;
+////    }
+
+
+
+    /*private final ReactiveMongoTemplate mongoTemplate;
+
+    public UserService(ReactiveMongoTemplate mongoTemplate) {
+        this.mongoTemplate = mongoTemplate;
+    }
+
+    @Autowired
+    UserRepository userRepository;
+
+    @Autowired
+    OrderRepository orderRepository;
+
+    public Mono<User> addUser(User user){
+
+        return userRepository.save(user);
+    }
+
+
+
+    public Flux<User> getUsersWithOrders() {
+        return userRepository.findAll();
+
+
+//        Aggregation aggregation = Aggregation.newAggregation(
+//                Aggregation.match(Criteria.where("userId").is(userRepository)),
+//                Aggregation.lookup("Orders", "userId", "_Id", "Orders"),
+//                Aggregation.unwind("Orders", true)
+//        );
+       // Flux<User> users = mongoTemplate.aggregate(aggregation, "users", User.class);
+
+        //db.User.aggregate([{$lookup:{from:"Orders", localField:"userId",foreignField:"_id",as:"Orders"}}])
+
+    }
+
+     */
+
+

src/main/java/com/nisum/webfluxmongodbordermanagement/service/UserService.java

+package com.nisum.webfluxmongodbordermanagement.service;
+
+
+import com.nisum.webfluxmongodbordermanagement.entity.User;
+import com.nisum.webfluxmongodbordermanagement.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+
+@Service
+public class UserService {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    public Flux<User> getUsers(){
+        return userRepository.findAll();
+    }
+
+
+}
\ No newline at end of file

src/main/resources/application.properties

+server.port=9090
+
+
+spring.data.mongodb.user-orders-db.uri=mongodb://localhost:27017/user-orders-db
+spring.data.mongodb.user-orders-db.database=user-orders-db
+
+#server.port=9001
+#spring.data.mongodb.host=localhost
+#spring.data.mongodb.port=27017
+#spring.data.mongodb.database=nisum
+
+#spring.data.mongodb.orders-db.uri=mongodb://localhost:27017/orders-db
+#spring.data.mongodb.orders-db.database=orders-db

src/test/java/com/nisum/webfluxmongodbordermanagement/WebfluxMongodbOrderManagementApplicationTests.java

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