SpringCloud/spring-cloud-stream
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

GH-2114 Add support for multiple binders to StreamBridge

Browse Source 
Resolves #2114
This commit is contained in:
Oleg Zhurakousky
2021-05-25 14:33:25 +02:00
parent 717a8e4f8b
commit 2677035779
5 changed files with 108 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
docs/src/main/asciidoc/_configprops.adoc
View File

@@ -9,7 +9,6 @@
|spring.cloud.stream.dynamic-destinations | `[]` | A list of destinations that can be bound dynamically. If set, only listed destinations can be bound.
|spring.cloud.stream.function.batch-mode | `false` |
|spring.cloud.stream.function.bindings | |
|spring.cloud.stream.function.definition | | Definition of functions to bind. If several functions need to be composed into one, use pipes (e.g., 'fooFunc\|barFunc')
|spring.cloud.stream.instance-count | `1` | The number of deployed instances of an application. Default: 1. NOTE: Could also be managed per individual binding "spring.cloud.stream.bindings.foo.consumer.instance-count" where 'foo' is the name of the binding.
|spring.cloud.stream.instance-index | `0` | The instance id of the application: a number from 0 to instanceCount-1. Used for partitioning and with Kafka. NOTE: Could also be managed per individual binding "spring.cloud.stream.bindings.foo.consumer.instance-index" where 'foo' is the name of the binding.
|spring.cloud.stream.instance-index-list | | A list of instance id's from 0 to instanceCount-1. Used for partitioning and with Kafka. NOTE: Could also be managed per individual binding "spring.cloud.stream.bindings.foo.consumer.instance-index-list" where 'foo' is the name of the binding. This setting will override the one set in 'spring.cloud.stream.instance-index'

27
docs/src/main/asciidoc/spring-cloud-stream.adoc
View File

@@ -683,7 +683,6 @@ public class WebSourceApplication {
@RequestMapping
@ResponseStatus(HttpStatus.ACCEPTED)
public void delegateToSupplier(@RequestBody String body) {
//processor.onNext(body);
streamBridge.send("myBinidng", body);
}
}
@@ -698,6 +697,32 @@ curl -H "Content-Type: text/plain" -X POST -d "hello from the other side" http:/
By showing two example we want to emphasize the approach will work with any type of foreign sources.
====== Output Content Type with StreamBridge
You can also provide specific content type if necessary with the following method signature `public boolean send(String bindingName, Object data, MimeType outputContentType)`.
Or if you send data as a `Message`, its content type will be honored.
====== Using specific binder type with StreamBridge
Spring Cloud Stream supports multiple binder scenarios. For example you may be receiving data from Kafka and sending it to RabbitMQ.
For more information on multiple binders scenarios, please see <<Binders>> section and specifically <<Multiple Binders on the Classpath>>
In the event you are planning to use StreamBridge and have more then one binder configured in your application you must also tell StreamBridge
which binder to use. And for that there are two more variations of `send` method:
[source, java]
----
public boolean send(String bindingName, @Nullable String binderType, Object data)
public boolean send(String bindingName, @Nullable String binderType, Object data, MimeType outputContentType)
----
As you can see there is one additional argument that you can provide - `binderType`, telling BindingService which binder to use when creating dynamic binding.
NOTE: For cases where `spring.cloud.stream.source` property is used or the binding was already created under different binder, the `binderType`
argument will have no effect.
===== Reactive Functions support