microservices

I understand the concept behind an API gateway as described by Richardson: http://microservices.io/patterns/apigateway.html But what is the difference to an Edge service. Is this a concrete implementation of the API gateway pattern? Technically, an API Gateway is the API exposed to the public (REST, etc.), and an Edge Service is a service running on the API resolving the proxying, routing, etc. There could be many edge services on the Gateway. But practically there is usually only one service, logic, on the Gateway thus API Gateway = Edge Service. 来源： https://stackoverflow.com/questions

I'm developing spring boot microservices example from the link: https://dzone.com/articles/spring-boot-creating . In this project I simply updated the parent dependency to its latest version and other code files are unchanged. I faced the following error when I click http://localhost:8080/order?idCustomer=2&idProduct=3&amount=4 2016-09-09 11:46:20.888 ERROR 14152 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : StandardWrapper.Throwable org.glassfish.jersey.server.model.ModelValidationException: Validation of the application resource model has failed during application initialization

We're building a microservice app where clients can create projects . The following diagram shows the technical flow of this process: My question: what HTTP response should the API gateway return to the client (step 1.)? My initial idea was to give back a 202, but the problem there is that I don't know the Location yet ( /projects/{id} ), because the id of the project will be created at the Project Management Service. Considering that the IDs of the newly created project entity is not known at the request time (i.e. it is generated after the insertion into the database) you indeed cannot

I tried turbine + hystrix dashboard with Spring boot 2 and latest versions of Spring cloud, seems exist some problem and turbine could not get stream from reactive service. I just uploaded simple microservices to github https://github.com/armdev/reactive-spring-cloud Exception like this: com.netflix.turbine.monitor.instance.InstanceMonitor$MisconfiguredHostException: [{"timestamp":"2018-03-08T17:22:05.809+0000","status":404,"error":"Not Found","message":"No message available","path":"/hystrix.stream"}] at com.netflix.turbine.monitor.instance.InstanceMonitor.init(InstanceMonitor.java:318) ~

For example amazon.com; they rely on microservice architecture and probably order and payment are seperate micro services but when you checkout order on amazon.com you can finally see the order id and details.If it's not eventual consistency approach what is it? Maybe 2PC? I'm generalizing my question; what if eventual consistency is not appropriate for business transaction(end user should see the result end of transaction) but seperate microservices is meaningful(like order and payment) how to handle immediate consistency? There are several techniques which can provide cross-service

There is a lot of discussion about microservice architecture. What I am missing - or maybe what I did not yet understand is, how to solve the issue of security and user authentication? For example: I develop a microservice which provides a Rest Service interface to a workflow engine. The engine is based on JEE and runs on application servers like GlassFish or Wildfly. One of the core concepts of the workflow engine is, that each call is user centric. This means depending of the role and access level of the current user, the workflow engine produces individual results (e.g. a user-centric