ryanjbaxter / beginners-guide-to-spring-cloud

Beginner's Guide To Spring Cloud

This is the repository for the Beginner's Guide to Spring Cloud talk. You can find the slides here.

Using This Repo

There are four importand directories in this repository.

1. beginners-guide-to-spring-cloud-config - This directory contains the configuration used by the Spring Cloud Config Server.
2. start - This directory contains basic Boot apps that are modified to use Spring Cloud
3. complete - This directory contains the finalized Boot apps that use Spring Cloud
4. config - This is configuration from Eureka, Config Server, and Zipkin used by the Spring Cloud CLI

Prereqs

Before you run the applications in this repository you should install the Spring Cloud CLI.

About The Apps

There are three apps in the start and four apps in the complete directories.

Name App

The name app will return the value of the name property when making an HTTP GET request to /.

Greeting App

The greetingapp returns a greeting. You can make a GET request to / and it will return Hello. You can also make an HTTP GET and pass a language code to return a greeting for that language. For example a GET to /es would return Hola.

Web App

The web app makes a request to both the greeting and name app to construct the proper greeting when you make a GET to /. By changing the Accept-Language header you can change the language of the greeting returned. For example if you set the Accept-Language header to de the greeting returned will be Hallo Ryan.

Gateway Web App

This app has the same functionality as the web app but leverages the new Spring Cloud Gateway project and uses Spring Boot 2.0.0. It is only present in the complete directory.

Running The Apps

From the root of the repo run

$ spring cloud eureka configserver zipkin

This will start a Eureka Server, Config Server, and Zipkin.

Then from the complete directory you can run each of the apps.

NOTE: You do not need to run the Eureka Server, Config Server, and Zipkin when running the app from the start directory because they do not use Spring Cloud.

beginners-guide-to-spring-cloud's Issues

IllegalArgumentException without url parameter in @FeignClient in Server Project

Hi,

I am trying to do the same example as in this project. But I am using Spring Boot 2.0.1.RELEASE and Finchley.RELEASE for Spring Cloud.

But if I do not pass the URL parameter for the @FeignClient used on NameFeignClient Interface the endpoints in WebController do not work at all i.e, localhost:8080. But if I do a localhost:8080/greeting or localhost:8080/name or localhost:9090 or localhost:7070 works perfectly fine. I thought url parameter in the @FeignClient is optional as it is supposed to discover from the name parameter.

Am I missing something, or did I do any mistake? Because in your talk I remember you telling that as we are using OpenFeign we can just give the name parameter in the annotation and the name microservice would be discovered by the web microservice.

Exception I get is : nested exception is java.lang.IllegalArgumentException: Expected authority at index 7: http://

spring cloud eureka configserver zipkin not running in repor Folder Giving the error Below

lovedeep@p:~/Documents/Workspace/beginners-guide-to-spring-cloud$ spring cloud eureka configserver zipkin
`

. ____ _ __ _ _
/\ / ' __ _ () __ __ _ \ \ \
( ( )__ | '_ | '| | ' / ` | \ \ \
\/ )| |)| | | | | || (| | ) ) ) )
' || .__|| ||| |_, | / / / /
=========||==============|/=////
:: Spring Boot :: (v2.2.1.RELEASE)

2019-11-13 16:39:08.705 INFO 31591 --- [ main] o.s.c.l.deployer.DeployerApplication : Starting DeployerApplication v2.2.0.BUILD-SNAPSHOT on p with PID 31591 (/home/lovedeep/.m2/repository/org/springframework/cloud/launcher/spring-cloud-launcher-deployer/2.2.0.BUILD-SNAPSHOT/spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar started by lovedeep in /home/lovedeep/Documents/Workspace/beginners-guide-to-spring-cloud)
2019-11-13 16:39:08.709 INFO 31591 --- [ main] o.s.c.l.deployer.DeployerApplication : No active profile set, falling back to default profiles: default
2019-11-13 16:39:09.443 INFO 31591 --- [ main] o.s.c.l.deployer.DeployerApplication : Started DeployerApplication in 1.413 seconds (JVM running for 5.748)
2019-11-13 16:39:09.714 INFO 31591 --- [ main] o.s.cloud.launcher.deployer.Deployer : Loaded YAML properties from: file [/home/lovedeep/Documents/Workspace/beginners-guide-to-spring-cloud/config/configserver.yml]
2019-11-13 16:39:11.777 INFO 31591 --- [ main] o.s.boot.loader.thin.PathResolver : Extracting dependencies from: file:/home/lovedeep/.m2/repository/org/springframework/cloud/launcher/spring-cloud-launcher-configserver/2.2.0.BUILD-SNAPSHOT/spring-cloud-launcher-configserver-2.2.0.BUILD-SNAPSHOT.jar, with profiles []
2019-11-13 16:39:11.778 INFO 31591 --- [ main] o.s.boot.loader.thin.PathResolver : Searching for properties in: file:/home/lovedeep/.m2/repository/org/springframework/cloud/launcher/spring-cloud-launcher-configserver/2.2.0.BUILD-SNAPSHOT/spring-cloud-launcher-configserver-2.2.0.BUILD-SNAPSHOT.jar
2019-11-13 16:39:11.782 INFO 31591 --- [ main] o.s.boot.loader.thin.PathResolver : Extracting dependencies from: class path resource [META-INF/thin/empty-pom.xml], with profiles []
2019-11-13 16:39:12.783 INFO 31591 --- [ main] o.s.b.loader.thin.MavenSettingsReader : No settings found at: /home/lovedeep/.m2/settings.xml
2019-11-13 16:39:12.809 INFO 31591 --- [ main] o.s.boot.loader.thin.DependencyResolver : Computing dependencies from pom and properties
2019-11-13 16:39:13.026 ERROR 31591 --- [ main] o.s.c.deployer.thin.ThinJarAppWrapper : Cannot deploy org.springframework.cloud.launcher:spring-cloud-launcher-configserver:jar:2.2.0.BUILD-SNAPSHOT

java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.deployer.thin.ContextRunner] from ClassLoader [java.net.URLClassLoader@42c12b3e]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:477) ~[spring-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
at org.springframework.util.ReflectionUtils.findMethod(ReflectionUtils.java:240) ~[spring-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
at org.springframework.cloud.deployer.thin.ThinJarAppWrapper.runContext(ThinJarAppWrapper.java:132) ~[spring-cloud-deployer-thin-1.0.22.RELEASE.jar:na]
at org.springframework.cloud.deployer.thin.ThinJarAppWrapper.run(ThinJarAppWrapper.java:90) ~[spring-cloud-deployer-thin-1.0.22.RELEASE.jar:na]
at org.springframework.cloud.deployer.thin.AbstractThinJarSupport.deploy(AbstractThinJarSupport.java:60) [spring-cloud-deployer-thin-1.0.22.RELEASE.jar:na]
at org.springframework.cloud.deployer.thin.ThinJarAppDeployer.deploy(ThinJarAppDeployer.java:63) [spring-cloud-deployer-thin-1.0.22.RELEASE.jar:na]
at org.springframework.cloud.launcher.deployer.Deployer.deployInternal(Deployer.java:203) [spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.Deployer.deploy(Deployer.java:108) [spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.DeployerApplication.launch(DeployerApplication.java:121) [spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.DeployerApplication.run(DeployerApplication.java:64) [spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.DeployerApplication.main(DeployerApplication.java:54) [spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar:1.0.22.RELEASE]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar:1.0.22.RELEASE]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar:1.0.22.RELEASE]
at org.springframework.boot.loader.thin.ThinJarLauncher.launch(ThinJarLauncher.java:193) [spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar:1.0.22.RELEASE]
at org.springframework.boot.loader.thin.ThinJarLauncher.main(ThinJarLauncher.java:140) [spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar:1.0.22.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
at org.springframework.boot.loader.wrapper.ThinJarWrapper.launch(ThinJarWrapper.java:140) [spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.boot.loader.wrapper.ThinJarWrapper.main(ThinJarWrapper.java:107) [spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
at org.springframework.cloud.launcher.cli.LauncherCommand$LauncherOptionHandler.run(LauncherCommand.java:115) [spring-cloud-launcher-cli-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.boot.cli.command.options.OptionHandler.run(OptionHandler.java:85) [classes!/:2.2.0.RELEASE]
at org.springframework.boot.cli.command.OptionParsingCommand.run(OptionParsingCommand.java:54) [classes!/:2.2.0.RELEASE]
at org.springframework.boot.cli.command.CommandRunner.run(CommandRunner.java:219) [classes!/:2.2.0.RELEASE]
at org.springframework.boot.cli.command.CommandRunner.runAndHandleErrors(CommandRunner.java:171) [classes!/:2.2.0.RELEASE]
at org.springframework.boot.cli.SpringCli.main(SpringCli.java:64) [classes!/:2.2.0.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar:1.0.22.RELEASE]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar:1.0.22.RELEASE]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:51) [spring-boot-thin-launcher-1.0.22.RELEASE-exec.jar:1.0.22.RELEASE]
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52) [spring-boot-cli-2.2.0.RELEASE.jar:2.2.0.RELEASE]
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/builder/SpringApplicationBuilder
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_222]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_222]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_222]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:459) ~[spring-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
... 43 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.builder.SpringApplicationBuilder
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_222]
... 47 common frames omitted

2019-11-13 16:39:13.042 ERROR 31591 --- [ main] o.s.cloud.launcher.cli.LauncherCommand : Error running spring cloud

java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
at org.springframework.cloud.launcher.cli.LauncherCommand$LauncherOptionHandler.run(LauncherCommand.java:115) ~[na:na]
at org.springframework.boot.cli.command.options.OptionHandler.run(OptionHandler.java:85) [classes!/:2.2.0.RELEASE]
at org.springframework.boot.cli.command.OptionParsingCommand.run(OptionParsingCommand.java:54) [classes!/:2.2.0.RELEASE]
at org.springframework.boot.cli.command.CommandRunner.run(CommandRunner.java:219) [classes!/:2.2.0.RELEASE]
at org.springframework.boot.cli.command.CommandRunner.runAndHandleErrors(CommandRunner.java:171) [classes!/:2.2.0.RELEASE]
at org.springframework.boot.cli.SpringCli.main(SpringCli.java:64) [classes!/:2.2.0.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [spring-boot-cli-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [spring-boot-cli-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:51) [spring-boot-cli-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52) [spring-boot-cli-2.2.0.RELEASE.jar:2.2.0.RELEASE]
Caused by: java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
at org.springframework.boot.loader.wrapper.ThinJarWrapper.launch(ThinJarWrapper.java:140) ~[spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.boot.loader.wrapper.ThinJarWrapper.main(ThinJarWrapper.java:107) ~[spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
... 18 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [spring-boot-cli-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [spring-boot-cli-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [spring-boot-cli-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.boot.loader.thin.ThinJarLauncher.launch(ThinJarLauncher.java:193) ~[spring-boot-thin-launcher-1.0.22.RELEASE.jar:1.0.22.RELEASE]
at org.springframework.boot.loader.thin.ThinJarLauncher.main(ThinJarLauncher.java:140) ~[spring-boot-thin-launcher-1.0.22.RELEASE.jar:1.0.22.RELEASE]
... 24 common frames omitted
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.deployer.thin.ContextRunner] from ClassLoader [java.net.URLClassLoader@42c12b3e]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:477) ~[spring-core-5.2.0.RELEASE.jar!/:5.2.0.RELEASE]
at org.springframework.util.ReflectionUtils.findMethod(ReflectionUtils.java:240) ~[spring-core-5.2.0.RELEASE.jar!/:5.2.0.RELEASE]
at org.springframework.util.ReflectionUtils.findMethod(ReflectionUtils.java:219) ~[spring-core-5.2.0.RELEASE.jar!/:5.2.0.RELEASE]
at org.springframework.cloud.deployer.thin.ThinJarAppWrapper.isRunning(ThinJarAppWrapper.java:118) ~[spring-cloud-deployer-thin-1.0.22.RELEASE.jar:na]
at org.springframework.cloud.deployer.thin.ThinJarAppWrapper.getState(ThinJarAppWrapper.java:218) ~[spring-cloud-deployer-thin-1.0.22.RELEASE.jar:na]
at org.springframework.cloud.deployer.thin.InMemoryAppInstanceStatus.getState(ThinJarAppDeployer.java:206) ~[spring-cloud-deployer-thin-1.0.22.RELEASE.jar:na]
at org.springframework.cloud.deployer.spi.app.AppStatus.getState(AppStatus.java:92) ~[spring-cloud-deployer-spi-1.1.4.RELEASE.jar:1.1.4.RELEASE]
at org.springframework.cloud.launcher.deployer.Deployer.getAppStatus(Deployer.java:251) ~[spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.Deployer.deployInternal(Deployer.java:204) ~[spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.Deployer.deploy(Deployer.java:108) ~[spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.DeployerApplication.launch(DeployerApplication.java:121) ~[spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.DeployerApplication.run(DeployerApplication.java:64) ~[spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
at org.springframework.cloud.launcher.deployer.DeployerApplication.main(DeployerApplication.java:54) ~[spring-cloud-launcher-deployer-2.2.0.BUILD-SNAPSHOT.jar:2.2.0.BUILD-SNAPSHOT]
... 33 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/builder/SpringApplicationBuilder
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_222]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_222]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_222]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:459) ~[spring-core-5.2.0.RELEASE.jar!/:5.2.0.RELEASE]
... 45 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.builder.SpringApplicationBuilder
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_222]
... 49 common frames omitted`

Cannot spring cloud cli , please update doc

Spring cli 3.0 without command install