├── .gitignore ├── README.md ├── banking-service ├── .gitignore ├── build.gradle.kts ├── gradle │ └── wrapper │ │ ├── gradle-wrapper.jar │ │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle.kts └── src │ ├── main │ ├── kotlin │ │ └── com │ │ │ └── gokhana │ │ │ └── bankingservice │ │ │ ├── BankingServiceApplication.kt │ │ │ ├── controller │ │ │ └── BankingController.kt │ │ │ └── model │ │ │ └── PayDTO.kt │ └── resources │ │ └── application.yaml │ └── test │ └── kotlin │ └── com │ └── gokhana │ └── bankingservice │ └── BankingServiceApplicationTests.kt └── payment-service ├── .gitignore ├── build.gradle ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle └── src ├── main ├── java │ └── com │ │ └── gokhana │ │ └── paymentservice │ │ ├── PaymentServiceApplication.java │ │ ├── client │ │ ├── BankingClient.java │ │ └── BankingFallback.java │ │ ├── controller │ │ └── PaymentController.java │ │ ├── model │ │ ├── PayRequest.java │ │ └── PaymentDTO.java │ │ └── service │ │ ├── PaymentService.java │ │ └── PaymentServiceImpl.java └── resources │ └── application.yaml └── test └── java └── com └── gokhana └── paymentservice └── PaymentServiceApplicationTests.java /.gitignore: -------------------------------------------------------------------------------- 1 | .gradle 2 | /build/ 3 | 4 | # Ignore Gradle GUI config 5 | gradle-app.setting 6 | 7 | # Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored) 8 | !gradle-wrapper.jar 9 | 10 | # Cache of project 11 | .gradletasknamecache 12 | 13 | # # Work around https://youtrack.jetbrains.com/issue/IDEA-116898 14 | # gradle/wrapper/gradle-wrapper.properties 15 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## Simple Synchronous Communication Example with Service Discovery 2 | 3 | Demo project for Microservice Synchronous communication using Kotlin, Spring Boot, Service Discovery Eureka, Eureka Client & FeignClient 4 | 5 | ![enter image description here](https://cdn-images-1.medium.com/max/800/1*BB3G8KmqWn5W3m3A7KtKOg.png) 6 | 7 | 8 | ## Requirements 9 | 1. Java - 1.11.x 10 | 2. Gradle- 3.x.x 11 | 3. Clone the [Service Discovery click it.](https://github.com/G-khan/spring-eureka-server-kotlin) 12 | 13 | **Step 1: Running the Service Discovery** 14 | Open the service discovery path then, 15 | Type the following command in your terminal to run the service discovery 16 | 17 | ./gradlew bootRun 18 | 19 | 20 | **Step 2: Running the Payment Service** 21 | Open the this project path then payment-service folder, 22 | Run the project with gradle: 23 | 24 | ./gradlew bootRun 25 | 26 | **Step 3: Running the Payment Service** 27 | Open the this project path then banking-service folder, 28 | Run the project with gradle: 29 | 30 | ./gradlew bootRun 31 | 32 | 33 | Check the link of eureka-server for seeing the registered services: http://localhost:8761/ 34 | 35 | ## Rest APIs 36 | 37 | The app defines following for APIs. 38 | 39 | POST http://localhost:8081/api/v1/payment 40 | 41 | { 42 | "paymentType":"credit card", 43 | "bankId":"123213213213213321" 44 | } 45 | -------------------------------------------------------------------------------- /banking-service/.gitignore: -------------------------------------------------------------------------------- 1 | HELP.md 2 | .gradle 3 | build/ 4 | !gradle/wrapper/gradle-wrapper.jar 5 | !**/src/main/**/build/ 6 | !**/src/test/**/build/ 7 | 8 | ### STS ### 9 | .apt_generated 10 | .classpath 11 | .factorypath 12 | .project 13 | .settings 14 | .springBeans 15 | .sts4-cache 16 | bin/ 17 | !**/src/main/**/bin/ 18 | !**/src/test/**/bin/ 19 | 20 | ### IntelliJ IDEA ### 21 | .idea 22 | *.iws 23 | *.iml 24 | *.ipr 25 | out/ 26 | !**/src/main/**/out/ 27 | !**/src/test/**/out/ 28 | 29 | ### NetBeans ### 30 | /nbproject/private/ 31 | /nbbuild/ 32 | /dist/ 33 | /nbdist/ 34 | /.nb-gradle/ 35 | 36 | ### VS Code ### 37 | .vscode/ 38 | -------------------------------------------------------------------------------- /banking-service/build.gradle.kts: -------------------------------------------------------------------------------- 1 | import org.jetbrains.kotlin.gradle.tasks.KotlinCompile 2 | 3 | plugins { 4 | id("org.springframework.boot") version "2.4.2" 5 | id("io.spring.dependency-management") version "1.0.11.RELEASE" 6 | kotlin("jvm") version "1.4.21" 7 | kotlin("plugin.spring") version "1.4.21" 8 | } 9 | 10 | group = "com.gokhana" 11 | version = "0.0.1-SNAPSHOT" 12 | java.sourceCompatibility = JavaVersion.VERSION_11 13 | 14 | repositories { 15 | mavenCentral() 16 | maven { url = uri("https://repo.spring.io/milestone") } 17 | } 18 | 19 | extra["springCloudVersion"] = "2020.0.0" 20 | 21 | dependencies { 22 | implementation("org.springframework.boot:spring-boot-starter-web") 23 | implementation("com.fasterxml.jackson.module:jackson-module-kotlin") 24 | implementation("org.jetbrains.kotlin:kotlin-reflect") 25 | implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8") 26 | implementation("org.springframework.cloud:spring-cloud-starter-netflix-eureka-client") 27 | testImplementation("org.springframework.boot:spring-boot-starter-test") 28 | } 29 | 30 | dependencyManagement { 31 | imports { 32 | mavenBom("org.springframework.cloud:spring-cloud-dependencies:${property("springCloudVersion")}") 33 | } 34 | } 35 | 36 | tasks.withType { 37 | kotlinOptions { 38 | freeCompilerArgs = listOf("-Xjsr305=strict") 39 | jvmTarget = "11" 40 | } 41 | } 42 | 43 | tasks.withType { 44 | useJUnitPlatform() 45 | } 46 | -------------------------------------------------------------------------------- /banking-service/gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/G-khan/synchronized-communication-between-microservices/7d66592bc5933a9b76c54d26a718427b80d35207/banking-service/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /banking-service/gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /banking-service/gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | 86 | # Determine the Java command to use to start the JVM. 87 | if [ -n "$JAVA_HOME" ] ; then 88 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 89 | # IBM's JDK on AIX uses strange locations for the executables 90 | JAVACMD="$JAVA_HOME/jre/sh/java" 91 | else 92 | JAVACMD="$JAVA_HOME/bin/java" 93 | fi 94 | if [ ! -x "$JAVACMD" ] ; then 95 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 96 | 97 | Please set the JAVA_HOME variable in your environment to match the 98 | location of your Java installation." 99 | fi 100 | else 101 | JAVACMD="java" 102 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 103 | 104 | Please set the JAVA_HOME variable in your environment to match the 105 | location of your Java installation." 106 | fi 107 | 108 | # Increase the maximum file descriptors if we can. 109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 110 | MAX_FD_LIMIT=`ulimit -H -n` 111 | if [ $? -eq 0 ] ; then 112 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 113 | MAX_FD="$MAX_FD_LIMIT" 114 | fi 115 | ulimit -n $MAX_FD 116 | if [ $? -ne 0 ] ; then 117 | warn "Could not set maximum file descriptor limit: $MAX_FD" 118 | fi 119 | else 120 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 121 | fi 122 | fi 123 | 124 | # For Darwin, add options to specify how the application appears in the dock 125 | if $darwin; then 126 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 127 | fi 128 | 129 | # For Cygwin or MSYS, switch paths to Windows format before running java 130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 131 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 132 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 133 | 134 | JAVACMD=`cygpath --unix "$JAVACMD"` 135 | 136 | # We build the pattern for arguments to be converted via cygpath 137 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 138 | SEP="" 139 | for dir in $ROOTDIRSRAW ; do 140 | ROOTDIRS="$ROOTDIRS$SEP$dir" 141 | SEP="|" 142 | done 143 | OURCYGPATTERN="(^($ROOTDIRS))" 144 | # Add a user-defined pattern to the cygpath arguments 145 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 146 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 147 | fi 148 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 149 | i=0 150 | for arg in "$@" ; do 151 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 152 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 153 | 154 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 155 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 156 | else 157 | eval `echo args$i`="\"$arg\"" 158 | fi 159 | i=`expr $i + 1` 160 | done 161 | case $i in 162 | 0) set -- ;; 163 | 1) set -- "$args0" ;; 164 | 2) set -- "$args0" "$args1" ;; 165 | 3) set -- "$args0" "$args1" "$args2" ;; 166 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;; 167 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 168 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 169 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 170 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 171 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 172 | esac 173 | fi 174 | 175 | # Escape application args 176 | save () { 177 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 178 | echo " " 179 | } 180 | APP_ARGS=`save "$@"` 181 | 182 | # Collect all arguments for the java command, following the shell quoting and substitution rules 183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 184 | 185 | exec "$JAVACMD" "$@" 186 | -------------------------------------------------------------------------------- /banking-service/gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if "%ERRORLEVEL%"=="0" goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 84 | exit /b 1 85 | 86 | :mainEnd 87 | if "%OS%"=="Windows_NT" endlocal 88 | 89 | :omega 90 | -------------------------------------------------------------------------------- /banking-service/settings.gradle.kts: -------------------------------------------------------------------------------- 1 | rootProject.name = "banking-service" 2 | -------------------------------------------------------------------------------- /banking-service/src/main/kotlin/com/gokhana/bankingservice/BankingServiceApplication.kt: -------------------------------------------------------------------------------- 1 | package com.gokhana.bankingservice 2 | 3 | import org.springframework.boot.autoconfigure.SpringBootApplication 4 | import org.springframework.boot.runApplication 5 | 6 | @SpringBootApplication 7 | class BankingServiceApplication 8 | 9 | fun main(args: Array) { 10 | runApplication(*args) 11 | } 12 | -------------------------------------------------------------------------------- /banking-service/src/main/kotlin/com/gokhana/bankingservice/controller/BankingController.kt: -------------------------------------------------------------------------------- 1 | package com.gokhana.bankingservice.controller 2 | 3 | import com.gokhana.bankingservice.model.PayDTO 4 | import org.springframework.web.bind.annotation.PostMapping 5 | import org.springframework.web.bind.annotation.RestController 6 | import org.springframework.web.bind.annotation.RequestMapping 7 | import com.gokhana.bankingservice.model.toResponse 8 | import org.springframework.web.bind.annotation.RequestBody 9 | 10 | @RestController 11 | @RequestMapping("/api/v1/") 12 | class BankingController { 13 | 14 | @PostMapping("banking") 15 | fun pay(@RequestBody payDTO: PayDTO): MutableMap { 16 | print("Incoming payment: $payDTO") 17 | return toResponse(true) 18 | } 19 | 20 | } -------------------------------------------------------------------------------- /banking-service/src/main/kotlin/com/gokhana/bankingservice/model/PayDTO.kt: -------------------------------------------------------------------------------- 1 | package com.gokhana.bankingservice.model 2 | 3 | import kotlin.random.Random 4 | 5 | data class PayDTO(val paymentType: String, 6 | val bankId: String, 7 | val payDetail: String) 8 | 9 | fun toResponse(success: Boolean) = mutableMapOf("success" to success, "id" to Random.nextInt(0, 100)) -------------------------------------------------------------------------------- /banking-service/src/main/resources/application.yaml: -------------------------------------------------------------------------------- 1 | spring: 2 | application: 3 | name: banking-service 4 | server: 5 | port: 8082 6 | eureka: 7 | client: 8 | serviceUrl: 9 | defaultZone: http://localhost:8761/eureka 10 | instance: 11 | preferIpAddress: true -------------------------------------------------------------------------------- /banking-service/src/test/kotlin/com/gokhana/bankingservice/BankingServiceApplicationTests.kt: -------------------------------------------------------------------------------- 1 | package com.gokhana.bankingservice 2 | 3 | import org.junit.jupiter.api.Test 4 | import org.springframework.boot.test.context.SpringBootTest 5 | 6 | @SpringBootTest 7 | class BankingServiceApplicationTests { 8 | 9 | @Test 10 | fun contextLoads() { 11 | } 12 | 13 | } 14 | -------------------------------------------------------------------------------- /payment-service/.gitignore: -------------------------------------------------------------------------------- 1 | HELP.md 2 | .gradle 3 | build/ 4 | !gradle/wrapper/gradle-wrapper.jar 5 | !**/src/main/**/build/ 6 | !**/src/test/**/build/ 7 | 8 | ### STS ### 9 | .apt_generated 10 | .classpath 11 | .factorypath 12 | .project 13 | .settings 14 | .springBeans 15 | .sts4-cache 16 | bin/ 17 | !**/src/main/**/bin/ 18 | !**/src/test/**/bin/ 19 | 20 | ### IntelliJ IDEA ### 21 | .idea 22 | *.iws 23 | *.iml 24 | *.ipr 25 | out/ 26 | !**/src/main/**/out/ 27 | !**/src/test/**/out/ 28 | 29 | ### NetBeans ### 30 | /nbproject/private/ 31 | /nbbuild/ 32 | /dist/ 33 | /nbdist/ 34 | /.nb-gradle/ 35 | 36 | ### VS Code ### 37 | .vscode/ 38 | -------------------------------------------------------------------------------- /payment-service/build.gradle: -------------------------------------------------------------------------------- 1 | plugins { 2 | id 'org.springframework.boot' version '2.4.2' 3 | id 'io.spring.dependency-management' version '1.0.11.RELEASE' 4 | id 'java' 5 | } 6 | 7 | group = 'com.gokhana' 8 | version = '0.0.1-SNAPSHOT' 9 | sourceCompatibility = '11' 10 | 11 | repositories { 12 | mavenCentral() 13 | maven { url 'https://repo.spring.io/milestone' } 14 | } 15 | 16 | ext { 17 | set('springCloudVersion', "2020.0.0") 18 | } 19 | 20 | dependencies { 21 | implementation 'org.springframework.boot:spring-boot-starter-web' 22 | implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client' 23 | implementation group: 'org.springframework.cloud', name: 'spring-cloud-starter-openfeign', version: '3.0.0' 24 | testImplementation 'org.springframework.boot:spring-boot-starter-test' 25 | } 26 | 27 | dependencyManagement { 28 | imports { 29 | mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}" 30 | } 31 | } 32 | 33 | test { 34 | useJUnitPlatform() 35 | } 36 | -------------------------------------------------------------------------------- /payment-service/gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/G-khan/synchronized-communication-between-microservices/7d66592bc5933a9b76c54d26a718427b80d35207/payment-service/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /payment-service/gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /payment-service/gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | 86 | # Determine the Java command to use to start the JVM. 87 | if [ -n "$JAVA_HOME" ] ; then 88 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 89 | # IBM's JDK on AIX uses strange locations for the executables 90 | JAVACMD="$JAVA_HOME/jre/sh/java" 91 | else 92 | JAVACMD="$JAVA_HOME/bin/java" 93 | fi 94 | if [ ! -x "$JAVACMD" ] ; then 95 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 96 | 97 | Please set the JAVA_HOME variable in your environment to match the 98 | location of your Java installation." 99 | fi 100 | else 101 | JAVACMD="java" 102 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 103 | 104 | Please set the JAVA_HOME variable in your environment to match the 105 | location of your Java installation." 106 | fi 107 | 108 | # Increase the maximum file descriptors if we can. 109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 110 | MAX_FD_LIMIT=`ulimit -H -n` 111 | if [ $? -eq 0 ] ; then 112 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 113 | MAX_FD="$MAX_FD_LIMIT" 114 | fi 115 | ulimit -n $MAX_FD 116 | if [ $? -ne 0 ] ; then 117 | warn "Could not set maximum file descriptor limit: $MAX_FD" 118 | fi 119 | else 120 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 121 | fi 122 | fi 123 | 124 | # For Darwin, add options to specify how the application appears in the dock 125 | if $darwin; then 126 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 127 | fi 128 | 129 | # For Cygwin or MSYS, switch paths to Windows format before running java 130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 131 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 132 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 133 | 134 | JAVACMD=`cygpath --unix "$JAVACMD"` 135 | 136 | # We build the pattern for arguments to be converted via cygpath 137 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 138 | SEP="" 139 | for dir in $ROOTDIRSRAW ; do 140 | ROOTDIRS="$ROOTDIRS$SEP$dir" 141 | SEP="|" 142 | done 143 | OURCYGPATTERN="(^($ROOTDIRS))" 144 | # Add a user-defined pattern to the cygpath arguments 145 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 146 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 147 | fi 148 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 149 | i=0 150 | for arg in "$@" ; do 151 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 152 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 153 | 154 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 155 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 156 | else 157 | eval `echo args$i`="\"$arg\"" 158 | fi 159 | i=`expr $i + 1` 160 | done 161 | case $i in 162 | 0) set -- ;; 163 | 1) set -- "$args0" ;; 164 | 2) set -- "$args0" "$args1" ;; 165 | 3) set -- "$args0" "$args1" "$args2" ;; 166 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;; 167 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 168 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 169 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 170 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 171 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 172 | esac 173 | fi 174 | 175 | # Escape application args 176 | save () { 177 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 178 | echo " " 179 | } 180 | APP_ARGS=`save "$@"` 181 | 182 | # Collect all arguments for the java command, following the shell quoting and substitution rules 183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 184 | 185 | exec "$JAVACMD" "$@" 186 | -------------------------------------------------------------------------------- /payment-service/gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if "%ERRORLEVEL%"=="0" goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 84 | exit /b 1 85 | 86 | :mainEnd 87 | if "%OS%"=="Windows_NT" endlocal 88 | 89 | :omega 90 | -------------------------------------------------------------------------------- /payment-service/settings.gradle: -------------------------------------------------------------------------------- 1 | rootProject.name = 'payment-service' 2 | -------------------------------------------------------------------------------- /payment-service/src/main/java/com/gokhana/paymentservice/PaymentServiceApplication.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice; 2 | 3 | import org.springframework.boot.SpringApplication; 4 | import org.springframework.boot.autoconfigure.SpringBootApplication; 5 | import org.springframework.cloud.netflix.eureka.EnableEurekaClient; 6 | import org.springframework.cloud.openfeign.EnableFeignClients; 7 | 8 | @EnableFeignClients 9 | @EnableEurekaClient 10 | @SpringBootApplication 11 | public class PaymentServiceApplication { 12 | 13 | public static void main(String[] args) { 14 | SpringApplication.run(PaymentServiceApplication.class, args); 15 | } 16 | 17 | } 18 | -------------------------------------------------------------------------------- /payment-service/src/main/java/com/gokhana/paymentservice/client/BankingClient.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice.client; 2 | 3 | import com.gokhana.paymentservice.model.PayRequest; 4 | import org.springframework.cloud.openfeign.FeignClient; 5 | import org.springframework.web.bind.annotation.PostMapping; 6 | 7 | import java.util.Map; 8 | 9 | @FeignClient("banking-service") 10 | public interface BankingClient { 11 | 12 | @PostMapping(value = "/api/v1/banking") 13 | Map pay(PayRequest payRequest); 14 | } 15 | -------------------------------------------------------------------------------- /payment-service/src/main/java/com/gokhana/paymentservice/client/BankingFallback.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice.client; 2 | 3 | import com.gokhana.paymentservice.model.PayRequest; 4 | 5 | import java.util.Map; 6 | 7 | public class BankingFallback implements BankingClient { 8 | 9 | @Override 10 | public Map pay(PayRequest payRequest) { 11 | // callback for fail scenario 12 | throw new RuntimeException("There is an Exception while payment!"); 13 | } 14 | } 15 | -------------------------------------------------------------------------------- /payment-service/src/main/java/com/gokhana/paymentservice/controller/PaymentController.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice.controller; 2 | 3 | import com.gokhana.paymentservice.model.PaymentDTO; 4 | import com.gokhana.paymentservice.service.PaymentService; 5 | import org.slf4j.Logger; 6 | import org.slf4j.LoggerFactory; 7 | import org.springframework.beans.factory.annotation.Autowired; 8 | import org.springframework.http.ResponseEntity; 9 | import org.springframework.web.bind.annotation.PostMapping; 10 | import org.springframework.web.bind.annotation.RequestBody; 11 | import org.springframework.web.bind.annotation.RequestMapping; 12 | import org.springframework.web.bind.annotation.RestController; 13 | 14 | @RestController 15 | @RequestMapping("/api/v1") 16 | public class PaymentController { 17 | 18 | private static final Logger LOGGER = LoggerFactory.getLogger(PaymentController.class); 19 | 20 | final PaymentService paymentService; 21 | 22 | public PaymentController(PaymentService paymentService) { 23 | this.paymentService = paymentService; 24 | } 25 | 26 | @PostMapping("payment") 27 | private ResponseEntity payment(@RequestBody PaymentDTO paymentDTO){ 28 | LOGGER.info("Incoming Request for payment:{}",paymentDTO.toString()); 29 | PaymentDTO response = paymentService.pay(paymentDTO); 30 | return ResponseEntity.ok().body(response); 31 | } 32 | 33 | } 34 | -------------------------------------------------------------------------------- /payment-service/src/main/java/com/gokhana/paymentservice/model/PayRequest.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice.model; 2 | 3 | public class PayRequest { 4 | 5 | private String paymentType; 6 | private String bankId; 7 | private String payDetail; 8 | 9 | public PayRequest() { 10 | } 11 | 12 | public PayRequest(String paymentType, String bankId, String payDetail) { 13 | this.paymentType = paymentType; 14 | this.bankId = bankId; 15 | this.payDetail = payDetail; 16 | } 17 | 18 | public String getPaymentType() { 19 | return paymentType; 20 | } 21 | 22 | public void setPaymentType(String paymentType) { 23 | this.paymentType = paymentType; 24 | } 25 | 26 | public String getBankId() { 27 | return bankId; 28 | } 29 | 30 | public void setBankId(String bankId) { 31 | this.bankId = bankId; 32 | } 33 | 34 | public String getPayDetail() { 35 | return payDetail; 36 | } 37 | 38 | public void setPayDetail(String payDetail) { 39 | this.payDetail = payDetail; 40 | } 41 | 42 | @Override 43 | public String toString() { 44 | return "PayRequest{" + 45 | "paymentType='" + paymentType + '\'' + 46 | ", bankId='" + bankId + '\'' + 47 | ", payDetail='" + payDetail + '\'' + 48 | '}'; 49 | } 50 | } 51 | -------------------------------------------------------------------------------- /payment-service/src/main/java/com/gokhana/paymentservice/model/PaymentDTO.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice.model; 2 | 3 | public class PaymentDTO { 4 | private Integer id; 5 | private String paymentType; 6 | private String bankId; 7 | private Double amount; 8 | 9 | public PaymentDTO() { 10 | } 11 | 12 | public Integer getId() { 13 | return id; 14 | } 15 | 16 | public void setId(Integer id) { 17 | this.id = id; 18 | } 19 | 20 | public String getPaymentType() { 21 | return paymentType; 22 | } 23 | 24 | public void setPaymentType(String paymentType) { 25 | this.paymentType = paymentType; 26 | } 27 | 28 | public String getBankId() { 29 | return bankId; 30 | } 31 | 32 | public void setBankId(String bankId) { 33 | this.bankId = bankId; 34 | } 35 | 36 | public Double getAmount() { 37 | return amount; 38 | } 39 | 40 | public void setAmount(Double amount) { 41 | this.amount = amount; 42 | } 43 | 44 | @Override 45 | public String toString() { 46 | return "PaymentDTO{" + 47 | "id=" + id + 48 | ", paymentType='" + paymentType + '\'' + 49 | ", bankId='" + bankId + '\'' + 50 | ", amount=" + amount + 51 | '}'; 52 | } 53 | } 54 | -------------------------------------------------------------------------------- /payment-service/src/main/java/com/gokhana/paymentservice/service/PaymentService.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice.service; 2 | 3 | import com.gokhana.paymentservice.model.PaymentDTO; 4 | 5 | public interface PaymentService { 6 | 7 | PaymentDTO pay(PaymentDTO paymentDTO); 8 | } 9 | -------------------------------------------------------------------------------- /payment-service/src/main/java/com/gokhana/paymentservice/service/PaymentServiceImpl.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice.service; 2 | 3 | import com.gokhana.paymentservice.client.BankingClient; 4 | import com.gokhana.paymentservice.controller.PaymentController; 5 | import com.gokhana.paymentservice.model.PayRequest; 6 | import com.gokhana.paymentservice.model.PaymentDTO; 7 | import org.slf4j.Logger; 8 | import org.slf4j.LoggerFactory; 9 | import org.springframework.stereotype.Service; 10 | 11 | import java.util.Map; 12 | 13 | @Service 14 | public class PaymentServiceImpl implements PaymentService{ 15 | 16 | private static final Logger LOGGER = LoggerFactory.getLogger(PaymentController.class); 17 | 18 | final BankingClient bankingClient; 19 | 20 | public PaymentServiceImpl(BankingClient bankingClient) { 21 | this.bankingClient = bankingClient; 22 | } 23 | 24 | @Override 25 | public PaymentDTO pay(PaymentDTO paymentDTO) { 26 | Map bankResponse = bankingClient.pay(new PayRequest(paymentDTO.getPaymentType(),paymentDTO.getBankId(),paymentDTO.getAmount().toString())); 27 | paymentDTO.setId((Integer) bankResponse.get("id")); 28 | LOGGER.info("Payment is done with :{}",bankResponse.toString()); 29 | return paymentDTO; 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /payment-service/src/main/resources/application.yaml: -------------------------------------------------------------------------------- 1 | spring: 2 | application: 3 | name: payment-service 4 | server: 5 | port: 8081 6 | eureka: 7 | client: 8 | serviceUrl: 9 | defaultZone: http://localhost:8761/eureka 10 | instance: 11 | preferIpAddress: true -------------------------------------------------------------------------------- /payment-service/src/test/java/com/gokhana/paymentservice/PaymentServiceApplicationTests.java: -------------------------------------------------------------------------------- 1 | package com.gokhana.paymentservice; 2 | 3 | import org.junit.jupiter.api.Test; 4 | import org.springframework.boot.test.context.SpringBootTest; 5 | 6 | @SpringBootTest 7 | class PaymentServiceApplicationTests { 8 | 9 | @Test 10 | void contextLoads() { 11 | } 12 | 13 | } 14 | --------------------------------------------------------------------------------