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This example demonstrates how you can use Camel-gRPC Starter component. The example is composed of a standalone gRPC server and a Camel Spring-boot gRPC route acting as client.
You can build the server under the directory hello-camel-grpc-server with:
$ mvn clean install
and then run the server with
$ mvn exec:java
You should see the following output:
Aug 08, 2017 8:00:00 AM org.apache.camel.examples.grpc.HelloCamelServer start
INFO: Server started. I'm listening on 50051
You can build the client example under the directory hello-camel-grpc-client with:
$ mvn clean install
and then run the example with
$ mvn spring-boot:run
And you should see this output in the console.
2017-08-08 08:01:14.530 INFO 7096 --- [ main] o.a.c.e.springboot.grpc.Application : Starting Application on ghost with PID 7096 (/home/oscerd/workspace/apache-camel/camel/examples/camel-example-spring-boot-grpc/hello-camel-grpc-client/target/classes started by oscerd in /home/oscerd/workspace/apache-camel/camel/examples/camel-example-spring-boot-grpc/hello-camel-grpc-client)
2017-08-08 08:01:14.532 INFO 7096 --- [ main] o.a.c.e.springboot.grpc.Application : No active profile set, falling back to default profiles: default
2017-08-08 08:01:14.563 INFO 7096 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@540ff973: startup date [Tue Aug 08 08:01:14 CEST 2017]; root of context hierarchy
2017-08-08 08:01:15.177 INFO 7096 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.apache.camel.spring.boot.CamelAutoConfiguration' of type [org.apache.camel.spring.boot.CamelAutoConfiguration$$EnhancerBySpringCGLIB$$78492c0f] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2017-08-08 08:01:15.447 INFO 7096 --- [ main] o.a.c.i.converter.DefaultTypeConverter : Type converters loaded (core: 192, classpath: 1)
2017-08-08 08:01:15.844 INFO 7096 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-08-08 08:01:15.894 INFO 7096 --- [ main] o.a.camel.spring.boot.RoutesCollector : Loading additional Camel XML routes from: classpath:camel/*.xml
2017-08-08 08:01:15.894 INFO 7096 --- [ main] o.a.camel.spring.boot.RoutesCollector : Loading additional Camel XML rests from: classpath:camel-rest/*.xml
2017-08-08 08:01:15.895 INFO 7096 --- [ main] o.a.camel.spring.boot.RoutesCollector : Starting CamelMainRunController to ensure the main thread keeps running
2017-08-08 08:01:15.898 INFO 7096 --- [inRunController] o.a.camel.spring.SpringCamelContext : Apache Camel 2.20.0-SNAPSHOT (CamelContext: gRPC) is starting
2017-08-08 08:01:15.899 INFO 7096 --- [inRunController] o.a.c.m.ManagedManagementStrategy : JMX is enabled
2017-08-08 08:01:15.904 INFO 7096 --- [ main] o.a.c.e.springboot.grpc.Application : Started Application in 1.897 seconds (JVM running for 7.75)
2017-08-08 08:01:16.074 INFO 7096 --- [inRunController] o.a.camel.spring.SpringCamelContext : StreamCaching is not in use. If using streams then its recommended to enable stream caching. See more details at http://camel.apache.org/stream-caching.html
2017-08-08 08:01:16.118 INFO 7096 --- [inRunController] o.a.camel.component.grpc.GrpcProducer : Creating channel to the remote gRPC server localhost:50051
2017-08-08 08:01:16.214 INFO 7096 --- [inRunController] o.a.camel.spring.SpringCamelContext : Route: route1 started and consuming from: timer://foo?period=10000&repeatCount=1
2017-08-08 08:01:16.216 INFO 7096 --- [inRunController] o.a.camel.spring.SpringCamelContext : Total 1 routes, of which 1 are started.
2017-08-08 08:01:16.216 INFO 7096 --- [inRunController] o.a.camel.spring.SpringCamelContext : Apache Camel 2.20.0-SNAPSHOT (CamelContext: gRPC) started in 0.319 seconds
2017-08-08 08:01:17.534 INFO 7096 --- [2 - timer://foo] route1 : Received message: "Hello Camel"
If you hit any problem using Camel or have some feedback, then please let us know.
We also love contributors, so get involved :-)
The Camel riders!
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