ReactiveConsumer Improvements

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* Add `ConsumerSubscriber` to adapt `Consumer<?>` to the `Subscriber<?>`
* Add `SubscribableChannelPublisherAdapter` to adapt `SubscribableChannel` to `Publisher<?>` via `Flux.create()` on subscription
* Add `PollableChannelPublisherAdapter` to adapt `PollableChannel` to `Publisher<?>` via `Mono.delayMillis()` and `flatMap()` for `channel.receive()`

Use `concatMap()` for `PollableChannel`

Iterate `PollableChannel` until there is a data

Fix Lambda signature error via explicit class declaration:
```
java.lang.ClassFormatError: Duplicate field name&signature in class file org/springframework/integration/endpoint/ReactiveConsumer$PollableChannelPublisherAdapter$1
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.springframework.integration.endpoint.ReactiveConsumer$PollableChannelPublisherAdapter.lambda$new$2(ReactiveConsumer.java:163)
```
Looks like Java bug:

Move `Iterator<Message<?>>` instance to the `subscribe()` to avoid race conditions when we have several subscribers.

In other words make `Iterator<Message<?>>` subscriber-specific, but at the same time avoid re-instantiation for each `Flux.concatMap()` call caused by the previous `repeat()`

Upgrade to Reactor 3.0.3 and others

* Make fixes according Reactor 3.0.3 changes
* Remove redundant `TestSubscriber` in favor of `StepVerifier` and `mock(Subscriber)`
* Rework `PublisherIntegrationFlow` Reactive Streams implementation to the out-of-the-box `ReactiveConsumer` and `ReactiveChannel`

...

This commit is contained in:

Artem Bilan

2016-08-25 12:13:08 -04:00

committed by Gary Russell

parent 8070f72c44

commit ba576bbc0d

9 changed files with 280 additions and 1490 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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spring-integration-test/src/main/java/org/springframework/integration/test/reactive/TestSubscriber.java

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