I am just starting with Spring Integration with Spring Boot 2.
I am working on a application which uses Spring Integration's HTTP outbound gateway to consume a Spring boot Service.
I am consuming the spring boot service from Spring Integration application using Gateway.
When I call the Gateway method which in turn will use the outbound gateway to call the spring boot service, the request does not seem to be completed. It is just going on when I make the HTTP GET request via the browser.
The request is also not received by the Spring Boot service.
I am not able to identify what is wrong in my Integration application when using gateway to consume a Spring Boot 2 service.
I have shared my Spring Boot 2 Application and also the Integration application which I am using to consume it in the below github folder. it contains 2 folders, one for the spring Integration application and the other for the spring boot application.
https://github.com/gsamartian/spring-int-demos
I have exposed a REST interface for the Integration application using RestController.
I access the boot application from integration application via the url, http://localhost:8763/callExternalServiceViaGateway
I am able to access the spring boot application directly from its port.
If anyone can help me identify the cause it would be great.
Thanks,
Your problem that the gateway method is without any args:
#Gateway(requestChannel = "get.request.channel", replyChannel = "reply.channel")
String getCustomMessage();
In this case the gateway works as receiving. No any requests is send because nothing to wrap to the payload. See more info on the matter in the Reference Manual.
Right now I see several bugs with the payloadExpression and no arg, so I suggest you to add some String payload arg to the getCustomMessage() gateway method and perform it with an empty string.
Will take a look into the bugs and will fix them soon.
Thank you for a good sample how to catch and reproduce!
https://jira.spring.io/browse/INT-4448
https://jira.spring.io/browse/INT-4449
Related
I have developed a REST application using Spring Boot. Now I want to receive a multicast of a REST request on this application and respond to this multicast. However I have no clue how to implement this using Spring Boot and REST. I have looked online a lot and can't seem to find the answer.
I'm trying to build an application with a couple of services. One service publishes details to a rabbitMQ queue, another spring boot application has to consume them and send the correct details to the correct user. The front end is developed in reactJS. How can I implement the spring boot consuming and sending to the subscribed user part? Any reference is appreciated. Can I use the web socket in spring boot to this?
I have this requirement that I need to check if the java application (not web app) is running or down via bash script.
It is non springboot application as well. It is just a normal spring application that connects and listen to kafka, get the the object from the topic and call an API.
We thought of to use spring actuator to check the health however it is not a web application.
What is the recommended way to check a non-web and non-springboot application if it is up or down?
Please advise.
We have a springboot application which is currently having gateway as Zuul 1. Our application is running in Springboot 2.0.0.M2. We are trying to upgrade our Zuul gateway to Zuul 2. We created a springboot application with Zuul 2 dependency and added webflux dependency to get Netty server. The server starts fine, but we are still unclear that how the springboot application will understand that this is a gateway and filters needs to be executed. Although we have created Routes filter, but the same is not getting invoked.
Thanks in advance,
Ron
if you go through the video "https://www.youtube.com/watch?v=9wocKqF15B8" at 18:00 from spring developers. They clearly stated that zuul2 is not going to be supported by the spring ecosystem. Also, the replacement of zuul2 (non-blocking calls) is a spring cloud gateway which is also non-blocking calls.
I have to invoke a couple of rest web service from my spring boot application. I am planning to use the Camel to configure the flow and other EIP use cases. Some of the endpoints are using oAuth2 authentication. I am planning to use the Spring oAuthResttempalte. All the examples on the internet are either using restlet, CXF or camel-http.
Camel Rest Consmer
I am not able to find a single example with just spring resttemplate. Did anyone implement Camel Rest consumer using Spring Resttemplate?
Some of the Examples on the internet use a jetty server to consume a rest endpoint. Why do you need a jetty server for simple rest consumer?
Did anyone implement Camel Rest consumer using Spring Resttemplate?
I'm not aware of that and it's unlikely to found something in that direction because Camel already have bult-in components to consume rest endpoints.
Some of the Examples on the internet use a jetty server to consume a rest endpoint. Why do you need a jetty server for simple rest consumer?
I believe that jetty was used as a consumer not a producer endpoint. So you won't need the "server". Or maybe you saw an example using jetty acting as a server to serve an OAuth endpoint?
If you excuse my approach, I'd suggest to remain with Camel HTTP/Rest capabilities to consume REST APIs using OAuth. I've found this example on Gist:
from("direct:authService").tracing()
.setHeader(Exchange.HTTP_PATH)
.simple("<auth service context>/oauth2/token")
.setHeader("CamelHttpMethod")
.simple("POST")
.setHeader("Content-Type")
.simple("application/x-www-form-urlencoded")
.setHeader("Accept")
.simple("application/json")
.setBody()
.constant("grant_type=client_credentials&client_id=<client id>&client_secret=<client sec>")
.to("https4://<remote auth service url>")
.convertBodyTo(String.class)
.log("response from API: " + body())
.choice()
.when().simple("${header.CamelHttpResponseCode} == 200")
.unmarshal().json(JsonLibrary.Jackson, AccessResponseToken.class)
.setHeader("jwt").simple("${body.access_token}")
.to("direct:<some direct route>")
.otherwise()
.log("Not Authenticated!!!");
If you want to stick into OAuthRestTemplate you may implement a Processor or a bean to wrap those calls and return to your route the authorization token.