spring-functions-catalog

Files

Artem Bilan cf9d8cd79c GH-500: Workaround for non-serializable header (#503 )

Fixes https://github.com/spring-cloud/stream-applications/issues/500

When `listeners` are provided for `DefaultKafkaConsumerFactory`,
the target `KafkaConsumer` instance is proxied.
The `java.lang.reflect.Proxy` is `Serializable`,
but the value it is wrapping is not.
When the `MessageHeaders` is serialized (e.g. into persistent `MessageStore`),
it checks for `Serializable` type only on top-level object of the header.
Therefore, the `Proxy` is passing condition, but eventually we fail
with `NotSerializableException`, since the proxied object is not like that

* Remove `kafka_consumer` from a message before it reaches an aggregator
with its logic to serialize message into the store

This is a workaround until Spring for Apache Kafka is released
with the fix: https://github.com/spring-projects/spring-kafka/pull/2822

2023-09-22 15:02:02 -05:00

src

GH-500: Workaround for non-serializable header (#503 )

2023-09-22 15:02:02 -05:00

pom.xml

Next development version 4.0.0-SNAPSHOT / 2022.0.0-SNAPSHOT

2023-07-21 12:40:45 +00:00

README.adoc

GH-275: Mention ComponentCustomizer in READMEs

2023-06-05 22:21:01 -04:00

README.adoc

# Aggregator Function

This module provides an aggregation function that can be reused and composed in other applications.

## Beans for injection

You can import the `AggregatorFunctionConfiguration` in a Spring Boot application and then inject the following bean.

`aggregatorFunction`

You can use `aggregatorFunction` as a qualifier when injecting.

Once injected, you can use the `apply` method of the `Function` to invoke it and get the result.

## Configuration Options

For more information on the various options available, please see link:src/main/java/org/springframework/cloud/fn/aggregator/AggregatorFunctionProperties.java[AggregatorFunctionProperties.java]

A `ComponentCustomizer<AggregatorFactoryBean>` bean can be added in the target project to provide any custom options for the `AggregatorFactoryBean` configuration used by the `aggregatorFunction` definition.

## Tests

See this link:src/test/java/org/springframework/cloud/fn/aggregator/AggregatorFunctionApplicationTests.java[test suite] for examples of how this function is used.

## Other usage

See this link:../../../applications/processor/aggregator-processor/README.adoc[README] where this function is used to create a Spring Cloud Stream application.