initial commit

.gitignore

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

README.md

+***ECOM-STORE***
+
+
+**Description**
+
+    `This Project is consisting of ecom-like application where different users can order thier items and if item is not not available he gets out of stock messages (based on the conditions applied)`
+    `Here I had tried to make the things very simple and focused on the logic implementation`
+
+**Technologies used**
+
+    *Java 1.8, Mysql,SpringBoot,Juint5, JPA,Hibernate Mapping,RestFul Webservices, Gradle,Postman,*
+    
+    
+**How to Run the Appliation** 
+
+    clone the project using https://github.com/vikram026/ecom-store.git
+    build the project and make sure all the component test cases are passed 
+    Once the build is success run the springboot application;
+    
+
+**Prerequisites**
+    
+    1.Mysql should be installed in local with user name root and no password;
+    create database "ecomdb" tables will be created by hibernate
+    
+**Actual Process**
+
+
+
+    **ItemPreparation**
+    
+    2.prepare the data by hitting the API using Postman 
+        a.Create 10 items in item table using postman using below url and body in json;
+            POST: http://localhost:8991/item        (for save/update)
+            with body like below:
+            {
+            	"id":1,
+            	"name":"pencil",
+            	"qty":100,
+            	"price":20
+            }
+            
+            like that prepare more or less 10 items so that one can order more than one item;
+    3.once the data is prepared 
+        test these data using  GET:- http://localhost:8991/item
+            it will list all the item with its id;
+            using these itemId we are going to order items;
+    4. one can delete the item using DELETE:-http://localhost:8991/item?id=2    here id is itemid
+    
+    Placing the Order 
+    
+    single/bulk order by customer
+    5.  POST:-localhost:8991/order
+    
+    A customer can order single or multiple item or more then one quantity of single item changing the payload
+    
+    
+      
+     payload for single item be like :-
+     
+     {
+     	"orderId":1,
+     	"orderedItems":[ 
+     		{
+     		"id":5,
+     		"itemId":1,
+     		"qty":1
+     		}
+     	],
+     	"emailId":"vikram19977@gmail.com"
+     }
+     payload for more than one quantity of single item
+          {
+          	"orderId":1,
+          	"orderedItems":[ 
+          		{
+          		"id":5,
+          		"itemId":1,
+          		"qty":4
+          		}
+          	],
+          	"emailId":"vikram19977@gmail.com"
+          }
+          
+      payload for more then one item 
+       {
+            "orderId":1,
+            "orderedItems":[ 
+                {
+                "id":5,
+                "itemId":1,
+                "qty":1
+                },
+                 {
+                    "id":5,
+                    "itemId":1,
+                    "qty":1
+                 }
+            ],
+            "emailId":"testuser@gmail.com"
+        }  
+        
+       i. If we have happy path means order is placed  then we will get the message like ::
+        'sample output'-  "Order Placed...!  you have spent :"+xxxx +" Rupees";  xxxx=calculated total spent amount;
+       
+       ii. for any of the exception like out of stock item we have various messages coming to the customer accordinglg
+      
+      It is already tested by various component test cases written in test folder 
+      for both ItemController and OrderController;
+      
+      
+      6.GET:localhost:8991/order -> for listing all orders placed by all the customers
+      
+      sample output:
+      
+      
+      [
+          {
+              "orderId": 66,
+              "orderedItems": [
+                  {
+                      "id": 67,
+                      "itemId": 1,
+                      "qty": 30
+                  },
+                  {
+                      "id": 68,
+                      "itemId": 3,
+                      "qty": 2
+                  }
+              ],
+              "emailId": "vikram@234.com",
+              "amount": 2150
+          },
+          {
+              "orderId": 69,
+              "orderedItems": [
+                  {
+                      "id": 70,
+                      "itemId": 1,
+                      "qty": 5
+                  },
+                  {
+                      "id": 71,
+                      "itemId": 2,
+                      "qty": 5
+                  }
+              ],
+              "emailId": "vikram@234.com",
+              "amount": 250025
+          },
+          {
+              "orderId": 72,
+              "orderedItems": [
+                  {
+                      "id": 73,
+                      "itemId": 1,
+                      "qty": 5
+                  },
+                  {
+                      "id": 74,
+                      "itemId": 2,
+                      "qty": 5
+                  }
+              ],
+              "emailId": "vik123@gmail.com",
+              "amount": 250025
+          }
+      ]
+      
+      
+      
+      7.GET:localhost:8991/order/vik123@gmail.com  -> for listing the orders per customer separately;  
+       here email id is customer email id;
+       
+      sample output:
+      [
+          {
+              "orderId": 72,
+              "orderedItems": [
+                  {
+                      "id": 73,
+                      "itemId": 1,
+                      "qty": 5
+                  },
+                  {
+                      "id": 74,
+                      "itemId": 2,
+                      "qty": 5
+                  }
+              ],
+              "emailId": "vik123@gmail.com",
+              "amount": 250025
+          }
+      ]
+       
+     8.In TestCases I have used Junit5 conects as well with the 87% of testcase coverage;
+     
+     
+       
+      
+          
+        
+        
+
+
+    
+  
\ No newline at end of file

build.gradle

+plugins {
+	id 'org.springframework.boot' version '2.2.6.RELEASE'
+	id 'io.spring.dependency-management' version '1.0.9.RELEASE'
+	id 'java'
+}
+
+group = 'com.ecom'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '1.8'
+
+configurations {
+	developmentOnly
+	runtimeClasspath {
+		extendsFrom developmentOnly
+	}
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-actuator'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	compileOnly 'org.projectlombok:lombok'
+	developmentOnly 'org.springframework.boot:spring-boot-devtools'
+	runtimeOnly 'mysql:mysql-connector-java'
+	annotationProcessor 'org.projectlombok:lombok'
+	testImplementation('org.springframework.boot:spring-boot-starter-test') {
+		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
+	}
+}
+
+test {
+	useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# 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
+#
+#      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.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem 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, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

+rootProject.name = 'ecom-store'

src/main/java/com/ecom/EcomStoreApplication.java

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

src/main/java/com/ecom/common/EcomUtils.java

+package com.ecom.common;
+
+public interface EcomUtils {
+    String ERROR_IN_DB="Some error in DB could not process your order";
+    String SUCCESS_MESSAGE = "Order Placed...!  you have spent :";
+    String RUPEES = " Rupees";
+    String GET_ORDER_URL ="http://localhost:8991/order/";
+    String ITEMS_QUANTITY_SHOULD_NOT_BE_ZERO ="Item's quantity should not be 0 please add item" ;
+}

src/main/java/com/ecom/controller/ItemController.java

+package com.ecom.controller;
+
+import com.ecom.model.Item;
+import com.ecom.service.ItemService;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+import java.util.Optional;
+
+@RestController
+@RequestMapping("item")
+@Slf4j
+public class ItemController {
+
+    @Autowired
+    private ItemService itemService;
+
+    @PostMapping
+    public ResponseEntity<Item> save(@RequestBody Item item){
+        log.info("into controller save method");
+        Item savedItem= itemService.save(item);
+        if(savedItem!=null)
+            return new ResponseEntity<>(savedItem,HttpStatus.CREATED);
+        else
+            return new ResponseEntity<>(savedItem,HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<Optional<Item>> getById(@PathVariable int id){
+        log.info("into controller getById method");
+        Optional<Item> items= itemService.findById(id);
+        if(items.isPresent())
+            return new ResponseEntity<>(items, HttpStatus.OK);
+        else
+            return new ResponseEntity<>(items, HttpStatus.NOT_FOUND);
+
+    }
+    @GetMapping
+    public ResponseEntity<List<Item>> getAll(){
+
+        log.info("into getAll method " );
+        List<Item> items= itemService.findAll();
+        if(items!=null && !items.isEmpty())
+            return new ResponseEntity<>(items, HttpStatus.OK);
+        else
+            return new ResponseEntity<>(items, HttpStatus.NOT_FOUND);
+    }
+
+    @DeleteMapping
+    public ResponseEntity<String> deleteById(@RequestParam int id){
+        log.info("into controllers  Delete method for item");
+        String response= itemService.deleteById(id);
+        return new ResponseEntity<>(response, HttpStatus.OK);
+
+    }
+
+
+}

src/main/java/com/ecom/controller/OrderController.java

+package com.ecom.controller;
+
+import com.ecom.model.Orders;
+import com.ecom.service.OrderService;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("order")
+@Slf4j
+public class OrderController {
+
+    @Autowired
+    private OrderService orderService;
+
+    @PostMapping
+    public ResponseEntity<String> orderItems(@RequestBody Orders orders){
+
+        log.info("Into save method of Order");
+
+        String response= orderService.processOrder(orders);
+
+        log.info("response after process {} "+response);
+
+        return !orderService.isOutOfStock() ?
+         new ResponseEntity<>(response, HttpStatus.OK)
+                : new ResponseEntity<>(response, HttpStatus.NOT_ACCEPTABLE);
+    }
+
+    @GetMapping
+    public ResponseEntity<List<Orders>> getAllOrders(){
+
+        log.info("into Order getAllItem method");
+        List<Orders> orders= orderService.getAll();
+
+        return orders!=null && !orders.isEmpty() ? new ResponseEntity<>(orders, HttpStatus.OK)
+                :new ResponseEntity<>(orders, HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+
+    @GetMapping("/{emailId}")
+    public ResponseEntity<List<Orders>> getOrderDetailsByCustomerEmailId(@PathVariable String emailId ){
+
+        log.info("into find all order by emailid mehtod ");
+        List<Orders> orders= orderService.findOrderDetailsByEmailId(emailId);
+        log.info("orders details after the call"+orders);
+
+        return orders!=null && !orders.isEmpty() ? new ResponseEntity<>(orders, HttpStatus.OK)
+                :new ResponseEntity<>(orders, HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+}

src/main/java/com/ecom/model/Item.java

+package com.ecom.model;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.*;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class Item {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private int id;
+
+    @Column(name="name")
+    private String name;
+
+    @Column(name="qty")
+    private int qty;
+    @Column(name="price")
+    private int price;
+
+}

src/main/java/com/ecom/model/OrderedItems.java

+package com.ecom.model;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Data
+@NoArgsConstructor
+@Entity
+public class OrderedItems {
+    @Id @GeneratedValue(strategy = GenerationType.AUTO)
+    private int id;
+
+    private int itemId;
+
+    private int qty;
+
+
+}

src/main/java/com/ecom/model/Orders.java

+package com.ecom.model;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.*;
+import java.util.List;
+
+@Data
+@Entity
+@NoArgsConstructor
+public class Orders {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private int orderId;
+    @OneToMany(targetEntity = OrderedItems.class,cascade = CascadeType.ALL)
+    @JoinColumn(name = "orderId",referencedColumnName = "orderId")
+    private List<OrderedItems> orderedItems;
+
+    private String emailId;
+    private int amount;
+}

src/main/java/com/ecom/repository/ItemRepository.java

+package com.ecom.repository;
+
+import com.ecom.model.Item;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ItemRepository  extends JpaRepository<Item,Integer> {
+}

src/main/java/com/ecom/repository/OrderRepository.java

+package com.ecom.repository;
+
+import com.ecom.model.Orders;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+
+public interface OrderRepository  extends JpaRepository<Orders, Integer> {
+    List<Orders> findByEmailId(String emailId);
+}

src/main/java/com/ecom/repository/OrderedItemsRepository.java

+package com.ecom.repository;
+
+import com.ecom.model.OrderedItems;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface OrderedItemsRepository extends JpaRepository<OrderedItems,Integer> {
+
+}

src/main/java/com/ecom/service/ItemService.java

+package com.ecom.service;
+
+import com.ecom.model.Item;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface ItemService {
+    Item save(Item item);
+
+    Optional<Item> findById(int id);
+    String deleteById(int id);
+
+    List<Item> findAll();
+}

src/main/java/com/ecom/service/OrderService.java

+package com.ecom.service;
+
+import com.ecom.model.Orders;
+
+import java.util.List;
+
+public interface OrderService {
+
+    String processOrder(Orders orders);
+
+    boolean isOutOfStock();
+
+    List<Orders> getAll();
+
+    List<Orders> findOrderDetailsByEmailId(String emailId);
+}

src/main/java/com/ecom/service/impl/ItemServiceImpl.java

+package com.ecom.service.impl;
+
+import com.ecom.model.Item;
+import com.ecom.repository.ItemRepository;
+import com.ecom.service.ItemService;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+@Slf4j
+public class ItemServiceImpl  implements ItemService {
+
+    @Autowired
+    private ItemRepository itemRepository;
+
+    @Override
+    public Item save(Item item) {
+        return itemRepository.save(item);
+    }
+
+    @Override
+    public Optional<Item> findById(int id) {
+        return itemRepository.findById(id);
+    }
+
+    @Override
+    public String deleteById(int id) {
+        try{
+            itemRepository.deleteById(id);
+            return "Item with id "+id+" is deleted";
+        }catch (Exception e){
+            log.error("Item with id is not available");
+            e.getMessage();
+            return "Item with id is not available or db is down ";
+        }
+    }
+
+    @Override
+    public List<Item> findAll() {
+        log.info("into findAll service ");
+        return itemRepository.findAll();
+    }
+}

src/main/java/com/ecom/service/impl/OrderServiceImpl.java

+package com.ecom.service.impl;
+
+import com.ecom.common.EcomUtils;
+import com.ecom.model.Item;
+import com.ecom.model.OrderedItems;
+import com.ecom.model.Orders;
+import com.ecom.repository.OrderRepository;
+import com.ecom.repository.OrderedItemsRepository;
+import com.ecom.service.ItemService;
+import com.ecom.service.OrderService;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+@Slf4j
+public class OrderServiceImpl implements OrderService {
+    @Autowired
+    private OrderRepository orderRepository;
+
+    @Autowired
+    private OrderedItemsRepository orderedItemsRepository;
+
+    @Autowired
+    private ItemService itemService;
+
+    private String response;
+    private boolean outOfStock;
+    int totalAmount;
+
+    @Override
+    public boolean isOutOfStock(){
+        return outOfStock;
+    }
+
+    @Override
+    public String processOrder(Orders orders) {
+        response="";
+        outOfStock=false;
+        totalAmount=0;
+        try {
+            log.info("Into Process Order method");
+            process(orders.getOrderedItems());
+
+            if(!outOfStock) {
+                log.info("Total purchase amount : " + totalAmount);
+                orders.setAmount(totalAmount);
+                Orders ordersSaved = orderRepository.save(orders);
+                log.info("order after saved into database is " + ordersSaved);
+                response=EcomUtils.SUCCESS_MESSAGE+totalAmount+EcomUtils.RUPEES
+                        +" Please visite the "+EcomUtils.GET_ORDER_URL+orders.getEmailId();
+                return response;
+            }
+        }catch (Exception e){
+            log.error("could not saved into db");
+            e.printStackTrace();
+            response= EcomUtils.ERROR_IN_DB;
+
+        }
+        return response;
+
+    }
+
+
+
+    @Override
+    public List<Orders> getAll() {
+        log.info("Before calling getAll method to Db");
+        return orderRepository.findAll();
+    }
+
+    @Override
+    public List<Orders> findOrderDetailsByEmailId(String emailId) {
+        log.info("before Db call ");
+        return orderRepository.findByEmailId(emailId);
+    }
+
+    private void process(List<OrderedItems> orderedItemsList) {
+        log.info("started processing/calculating the order ");
+
+        for(OrderedItems e:orderedItemsList){
+            Optional<Item> itemOptional=itemService.findById(e.getItemId());
+
+            if(itemOptional.isPresent()){
+                Item item=itemOptional.get();
+                log.info("item available in the cart is "+item);
+                if( e.getQty()!=0 && e.getQty()<=item.getQty()){
+                    totalAmount+=e.getQty()*item.getPrice();
+                    item.setQty(item.getQty()-e.getQty());
+                    itemService.save(item);
+                }
+                else if(e.getQty()==0){
+                    response=EcomUtils.ITEMS_QUANTITY_SHOULD_NOT_BE_ZERO;
+                }
+                else{
+
+                     response=item.getQty()>0?"item "+item.getName()+" with id="+e.getItemId()+" is the first item we found out of stock for your purchase You can purchase only "+item.getQty()+" "+item.getName()
+                             :"Item " +item.getName()+"with id="+e.getItemId()+" is out of Stock please visit after some time.";
+                     outOfStock=true;
+                     break;
+                }
+            }else {
+                response="Item with id "+e.getItemId()+" not available please visit after some time.";
+                outOfStock=true;
+                break;
+            }
+        }
+
+    }
+}

src/main/resources/application.properties

+server.port=8991
+spring.datasource.url = jdbc:mysql://localhost:3306/ecomdb?useSSL=false
+spring.datasource.username = root
+spring.datasource.password =
+spring.jpa.show-sql = true
+spring.jpa.hibernate.ddl-auto = update
+spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
+spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

src/test/java/com/ecom/EcomStoreApplicationTests.java

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

src/test/java/com/ecom/config/TestConfig.java

+package com.ecom.config;
+
+import com.ecom.repository.ItemRepository;
+import com.ecom.repository.OrderRepository;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.test.mock.mockito.MockBean;
+
+@TestConfiguration
+public class TestConfig {
+
+    @MockBean
+    private ItemRepository itemRepository;
+    @MockBean
+    private OrderRepository orderRepository;
+}
\ No newline at end of file

src/test/java/com/ecom/controller/ItemControllerComponentTest.java

+package com.ecom.controller;
+
+import com.ecom.config.TestConfig;
+import com.ecom.model.Item;
+import com.ecom.repository.ItemRepository;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.junit.jupiter.params.provider.ValueSource;
+import org.mockito.ArgumentMatchers;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.when;
+
+@SpringBootTest
+@ContextConfiguration(classes = TestConfig.class)
+public class ItemControllerComponentTest {
+
+    @Autowired
+    private ItemController itemController;
+
+    @Autowired
+    private ItemRepository itemRepository;
+
+    @DisplayName("This method will test the save method  it will mock db ")
+    @ParameterizedTest
+    @MethodSource("getItemSource")
+    public void saveTest(Item item){
+        when(itemRepository.save(ArgumentMatchers.any(Item.class))).thenReturn(item);
+        ResponseEntity<Item> responseEntity =  itemController.save(item);
+        assertAll( "savetest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.CREATED,()->"status should be 201")
+                ,()->assertEquals(responseEntity.getBody().getId(),1,()->"id should be mocked id only")
+        );
+    }
+
+    @DisplayName("This method will test the save method  it will mock db ")
+    @ParameterizedTest
+    @MethodSource("getItemSource")
+    public void saveNegativeTest(Item item){
+        when(itemRepository.save(ArgumentMatchers.any(Item.class))).thenReturn(null);
+        ResponseEntity<Item> responseEntity =  itemController.save(item);
+        assertAll( "savetestnegative",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.INTERNAL_SERVER_ERROR,()->"status should be 500")
+                ,()->assertNull(responseEntity.getBody(),()->"body is null")
+        );
+    }
+
+    @DisplayName("This method will test the get method   it will mock db ")
+    @ParameterizedTest
+    @ValueSource(ints={1})
+    public void getByIdTest(int id){
+        Item response=mockItem();
+        when(itemRepository.findById(ArgumentMatchers.anyInt())).thenReturn(Optional.of(response));
+        ResponseEntity<Optional<Item>> responseEntity = itemController.getById(id);
+        assertAll( "gettest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.OK,()->"status should be 200")
+                ,()->assertNotNull(responseEntity.getBody(),()->"body is not null")
+        );
+    }
+
+
+    @DisplayName("This method will test the get method for negative scenario it will mock db ")
+    @ParameterizedTest
+    @ValueSource(ints={1})
+    public void getByIdTestNegative(int id){
+        Item response=mockItem();
+        when(itemRepository.findById(ArgumentMatchers.anyInt())).thenReturn(Optional.ofNullable(null));
+        ResponseEntity<Optional<Item>> responseEntity = itemController.getById(id);
+        assertAll( "gettestnegative",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.NOT_FOUND,()->"status should be NotFound")
+                ,()->assertEquals(responseEntity.getBody(),Optional.empty(),()->"body is  null")
+        );
+    }
+
+
+    @DisplayName("This method will test the getAll method   it will mock db ")
+    @Test
+    public void getAllTest(){
+        List<Item> response=Arrays.asList(mockItem());
+        when(itemRepository.findAll()).thenReturn(response);
+        ResponseEntity<List<Item>> responseEntity = itemController.getAll();
+        assertAll( "getAllTest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.OK,()->"status should be 200")
+                ,()->assertEquals(responseEntity.getBody(),response,()->"body is  List")
+        );
+    }
+
+
+    @DisplayName("This method will test the getAll method for Negeate test it will mock db ")
+    @Test
+    public void getAllTestNegative(){
+        List<Item> response=Arrays.asList(mockItem());
+        when(itemRepository.findAll()).thenReturn(null);
+        ResponseEntity<List<Item>> responseEntity = itemController.getAll();
+        assertAll( "getAllTest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.NOT_FOUND,()->"status should be Not found")
+                ,()->assertNull(responseEntity.getBody(),()->"body is  null")
+        );
+    }
+
+    @DisplayName("This method will test the deletebyId method  it will mock db ")
+    @ParameterizedTest
+    @ValueSource(ints={1})
+    public void deleteByIdTest(int id){
+        Item response=mockItem();
+        doNothing().when(itemRepository).deleteById(ArgumentMatchers.anyInt());
+        ResponseEntity<String> responseEntity = itemController.deleteById(id);
+        assertAll( "deleteByIdTest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.OK,()->"status should be OK")
+                ,()->assertEquals(responseEntity.getBody(),"Item with id "+1+" is deleted",()->"body is  null")
+
+        );
+    }
+
+
+
+    private static Stream<Arguments> getItemSource(){
+        return Stream.of(Arguments.of(mockItem()));
+    }
+
+    public static Item mockItem() {
+        Item item=new Item();
+        item.setQty(1);
+        item.setId(1);
+        item.setName("test");
+        item.setPrice(1);
+        return item;
+    }
+
+
+}

src/test/java/com/ecom/controller/OrderControllerComponentTest.java

+package com.ecom.controller;
+
+
+import com.ecom.config.TestConfig;
+import com.ecom.model.Item;
+import com.ecom.model.OrderedItems;
+import com.ecom.model.Orders;
+import com.ecom.repository.ItemRepository;
+import com.ecom.repository.OrderRepository;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.junit.jupiter.params.provider.ValueSource;
+import org.mockito.ArgumentMatchers;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.when;
+
+@SpringBootTest
+@ContextConfiguration(classes = TestConfig.class)
+public class OrderControllerComponentTest {
+
+    @Autowired
+    private OrderController orderController;
+
+    @Autowired
+    private OrderRepository orderRepository;
+
+    @Autowired
+    private ItemRepository itemRepository;
+
+    @DisplayName("This method will test the orderItems method  it will mock db ")
+    @ParameterizedTest
+    @MethodSource("getOrdersSource")
+    public void orderItemsTest(Orders orders){
+
+        String actualRespone="Order Placed...!  you have spent :"+1+" Rupees"
+                +" Please visite the http://localhost:8991/order/"+orders.getEmailId();
+
+        when(orderRepository.save(ArgumentMatchers.any(Orders.class))).thenReturn(orders);
+        when(itemRepository.findById(ArgumentMatchers.anyInt())).thenReturn(Optional.of(ItemControllerComponentTest.mockItem()));
+
+        when(itemRepository.save(ArgumentMatchers.any(Item.class))).thenReturn(null);
+
+        ResponseEntity<String> responseEntity =  orderController.orderItems(orders);
+        assertAll( "orderItemsTest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.OK,()->"status should be 200")
+                ,()->assertEquals(responseEntity.getBody(),actualRespone,()->" messages should match")
+        );
+    }
+
+    @DisplayName("This method will test the orderItems method for Out of Stock it will mock db ")
+    @ParameterizedTest
+    @MethodSource("getOrdersOutOfStockSource")
+    public void orderItemsOutOfStockTest(Orders orders){
+
+        String outOfStockRespone="item "+"test"+" with id="+1+" is the first item we found out of stock for your purchase You can purchase only "+1+" "+"test";
+
+        when(orderRepository.save(ArgumentMatchers.any(Orders.class))).thenReturn(orders);
+        when(itemRepository.findById(ArgumentMatchers.anyInt())).thenReturn(Optional.of(ItemControllerComponentTest.mockItem()));
+
+        when(itemRepository.save(ArgumentMatchers.any(Item.class))).thenReturn(null);
+
+        ResponseEntity<String> responseEntity =  orderController.orderItems(orders);
+        assertAll( "orderItemsTest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.NOT_ACCEPTABLE,()->"status should be 200")
+                ,()->assertEquals(responseEntity.getBody(),outOfStockRespone,()->" messages should match")
+        );
+    }
+
+
+    @DisplayName("This method will test the getOrderDetailsByCustomerEmailId method   it will mock db ")
+    @ParameterizedTest
+    @ValueSource(strings={"someemail"})
+    public void getOrderDetailsByCustomerEmailIdTest(String email){
+        List<Orders> response=Arrays.asList(mockOrders());
+        when(orderRepository.findByEmailId(ArgumentMatchers.anyString())).thenReturn(response);
+        ResponseEntity<List<Orders>> responseEntity = orderController.getOrderDetailsByCustomerEmailId(email);
+        assertAll( "gettest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.OK,()->"status should be 200")
+                ,()->assertNotNull(responseEntity.getBody(),()->"body is not null")
+        );
+    }
+
+
+    @DisplayName("This method will test the getOrderDetailsByCustomerEmailId  method  for negative scenario  it will mock db ")
+    @ParameterizedTest
+    @ValueSource(strings={"someemail"})
+    public void getOrderDetailsByCustomerEmailIdTestNegative(String email){
+        when(orderRepository.findByEmailId(ArgumentMatchers.anyString())).thenReturn(null);
+        ResponseEntity<List<Orders>> responseEntity = orderController.getOrderDetailsByCustomerEmailId(email);
+        assertAll( "gettest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.INTERNAL_SERVER_ERROR,()->"status should be 200")
+                ,()->assertNull(responseEntity.getBody(),()->"body is  null")
+        );
+    }
+
+
+    @DisplayName("This method will test the getAllOrder method   it will mock db ")
+    @Test
+    public void getAllOrderTest(){
+        List<Orders> response=Arrays.asList(mockOrders());
+        when(orderRepository.findAll()).thenReturn(response);
+        ResponseEntity<List<Orders>> responseEntity = orderController.getAllOrders();
+        assertAll( "getAllOrdersTest",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.OK,()->"status should be 200")
+                ,()->assertEquals(responseEntity.getBody(),response,()->"body is  List")
+        );
+    }
+
+
+    @DisplayName("This method will test the getAllOrders method for Negeate test it will mock db ")
+    @Test
+    public void getAllTestNegative(){
+        List<Orders> response=Arrays.asList(mockOrders());
+        when(orderRepository.findAll()).thenReturn(null);
+        ResponseEntity<List<Orders>> responseEntity = orderController.getAllOrders();
+        assertAll( "getAllTestNegative",
+                ()-> assertEquals(responseEntity.getStatusCode(), HttpStatus.INTERNAL_SERVER_ERROR,()->"status should be Not found")
+                ,()->assertNull(responseEntity.getBody(),()->"body is  null")
+        );
+    }
+
+
+
+    private static Stream<Arguments> getOrdersOutOfStockSource(){
+
+        return Stream.of(Arguments.of(mockOutOfStockOrders()));
+    }
+
+    private static Stream<Arguments> getOrdersSource(){
+        return Stream.of(Arguments.of(mockOrders()));
+    }
+
+    public static Orders mockOrders() {
+        Orders orders=new Orders();
+        orders.setOrderId(1);
+        orders.setEmailId("someemail");
+        OrderedItems orderedItems=new OrderedItems();
+        orderedItems.setItemId(1);
+        orderedItems.setQty(1);
+        orders.setOrderedItems(Arrays.asList(orderedItems));
+        return orders;
+    }
+    public static Orders mockOutOfStockOrders() {
+        Orders orders=new Orders();
+        orders.setOrderId(1);
+        orders.setEmailId("someemail");
+        OrderedItems orderedItems=new OrderedItems();
+        orderedItems.setItemId(1);
+        orderedItems.setQty(2);
+        orders.setOrderedItems(Arrays.asList(orderedItems));
+        return orders;
+    }
+
+
+}