jooby: camel module

1. Camel

Event bus module using Camel

1.1. Usage

1) Add the dependency:

Maven

Gradle

<dependency>
  <groupId>io.jooby</groupId>
  <artifactId>jooby-camel</artifactId>
  <version>3.5.3</version>
</dependency>

implementation 'io.jooby:jooby-camel:3.5.3'

2) Install

Java

Kotlin

import io.jooby.camel.CamelModule;

{
  install(new CamelModule(new MyRoutes()));                       (1)

  get("/{msg}", ctx -> {
    ProducerTemplate producer = require(ProducerTemplate.class);  (2)

    producer.sendBody("direct:foo", ctx.path("msg").value());     (3)

    ...
  });
}

public class MyRoutes extends RouteBuilder {

  @Override public void configure() throws Exception {
    from("direct://foo")
        .log("${body}");
  }
}

import io.jooby.camel.CamelModule

{
  install(CamelModule(MyRoutes()))                                (1)

  get("/{msg}") {
    val producer = require(ProducerTemplate::class);              (2)

    producer.sendBody("direct:foo", ctx.path("msg").value())      (3)
    ...
  }
}

class MyRoutes: RouteBuilder() {

  fun configure(): Unit {
    from("direct://foo")
        .bean(FooService.class)
        .log("${body}")
  }
}

1	Install Camel
2	Get ProducerTemplate
3	Send message to `direct:foo`

1.2. Configuration files

Camel module integrates with application.conf properties files:

application.conf

myprop = "my prop value"

Java

Kotlin

public class MyRoutes extends RouteBuilder {

  @Override public void configure() throws Exception {
    from("direct://foo")
        .log("{{myprop}}");
  }
}

class MyRoutes: RouteBuilder() {

  fun configure(): Unit {
    from("direct://foo")
        .bean(FooService.class)
        .log("{{myprop}}")
  }
}

See Property Placeholders

1.3. Dependency Injection Support

Camel module integrates with GuiceModule or SpringModule. Here is an example with Guice:

Java

Kotlin

import io.jooby.guice.GuiceModule;
import io.jooby.camel.CamelModule;

{
  install(new CamelModule(MyRoutes.class));  (1)

  install(new GuiceModule());                (2)
}

public class MyRoutes extends RouteBuilder {

  @Override public void configure() throws Exception {
    from("direct://foo")
        .bean(FooService.class)              (3)
        .log("${body}");
  }
}

import io.jooby.guice.GuiceModule
import io.jooby.camel.CamelModule

{
  install(CamelModule(MyRoutes::class.java))  (1)

  install(GuiceModule())                      (2)
}

class MyRoutes: RouteBuilder() {

  fun configure(): Unit {
    from("direct://foo")
        .bean(FooService.class)               (3)
        .log("${body}");
  }
}

1	Install Camel. `MyRoutes` will be provisioning by Guice.
2	Install Guice
3	Also `FooService` will be provisioning by Guice

  Keep in mind Camel beans are singleton by default, regardless of what dependency injection
framework you choose.

1.4. Auto Configuration

Camel modules can be fully configured from application.conf file.

application.conf

camel.main.name = My Camel Context
camel.threadpool.poolSize = 10

See Auto Configuration and Camel Main Options