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GH-1893 Added partition support for Supplier

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- Expended functional support for SpEL-based partitioning of outgoing messages that was added cce66f338a to Supplier.
- Added tests

- polished docs

Resolves #1893
This commit is contained in:
Oleg Zhurakousky
2020-02-10 16:42:56 +01:00
parent 968d3581df
commit 51f6187e39
3 changed files with 119 additions and 28 deletions
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13
docs/src/main/asciidoc/spring-cloud-stream.adoc
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@@ -2295,7 +2295,8 @@ public MessageSourceCustomizer<AmqpMessageSource> sourceCustomizer() {
These properties are exposed via `org.springframework.cloud.stream.binder.ProducerProperties`
The following binding properties are available for output bindings only and must be prefixed with `spring.cloud.stream.bindings.<bindingName>.producer.` (for example, `spring.cloud.stream.bindings.input.producer.partitionKeyExpression=payload.id`).
The following binding properties are available for output bindings only and must be prefixed with `spring.cloud.stream.bindings.<bindingName>.producer.`
(for example, `spring.cloud.stream.bindings.func-out-0.producer.partitionKeyExpression=payload.id`).
Default values can be set by using the prefix `spring.cloud.stream.default.producer` (for example, `spring.cloud.stream.default.producer.partitionKeyExpression=payload.id`).
@@ -2586,8 +2587,8 @@ You can configure an output binding to send partitioned data by setting one and
For example, the following is a valid and typical configuration:
----
spring.cloud.stream.bindings.output.producer.partitionKeyExpression=payload.id
spring.cloud.stream.bindings.output.producer.partitionCount=5
spring.cloud.stream.bindings.func-out-0.producer.partitionKeyExpression=payload.id
spring.cloud.stream.bindings.func-out-0.producer.partitionCount=5
----
Based on that example configuration, data is sent to the target partition by using the following logic.
@@ -2600,8 +2601,8 @@ If you have more then one bean of type `org.springframework.cloud.stream.binder.
[source]
----
--spring.cloud.stream.bindings.output.producer.partitionKeyExtractorName=customPartitionKeyExtractor
--spring.cloud.stream.bindings.output.producer.partitionCount=5
--spring.cloud.stream.bindings.func-out-0.producer.partitionKeyExtractorName=customPartitionKeyExtractor
--spring.cloud.stream.bindings.func-out-0.producer.partitionCount=5
. . .
@Bean
public CustomPartitionKeyExtractorClass customPartitionKeyExtractor() {
@@ -2619,7 +2620,7 @@ Similar to the `PartitionKeyExtractorStrategy`, you can further filter it by usi
[source]
----
--spring.cloud.stream.bindings.output.producer.partitionSelectorName=customPartitionSelector
--spring.cloud.stream.bindings.func-out-0.producer.partitionSelectorName=customPartitionSelector
. . .
@Bean
public CustomPartitionSelectorClass customPartitionSelector() {