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Add support for MonoSupplier

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This commit is contained in:
Dave Syer
2019-02-19 10:27:22 +00:00
parent a945f34ebd
commit a622d86d3b
2 changed files with 57 additions and 4 deletions
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11
spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/FunctionRegistration.java
View File

@@ -37,6 +37,7 @@ import org.springframework.cloud.function.core.FluxSupplier;
import org.springframework.cloud.function.core.FluxToMonoFunction;
import org.springframework.cloud.function.core.FluxedConsumer;
import org.springframework.cloud.function.core.FluxedFunction;
import org.springframework.cloud.function.core.MonoSupplier;
import org.springframework.cloud.function.core.MonoToFluxFunction;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
@@ -155,17 +156,19 @@ public class FunctionRegistration<T> implements BeanNameAware {
result = new FunctionRegistration<S>(target);
result.type(this.type.getType());
if (!type.isWrapper()) {
if (!this.type.isWrapper()) {
target = target instanceof Supplier
? (S) new FluxSupplier((Supplier<?>) target)
: target instanceof Function
? (S) new FluxFunction((Function<?, ?>) target)
: (S) new FluxConsumer((Consumer<?>) target);
}
else if (Mono.class.isAssignableFrom(type.getOutputWrapper())) {
target = (S) new FluxToMonoFunction((Function) target);
else if (Mono.class.isAssignableFrom(this.type.getOutputWrapper())) {
target = target instanceof Supplier
? (S) new MonoSupplier((Supplier<?>) target)
: (S) new FluxToMonoFunction((Function<?, ?>) target);
}
else if (Mono.class.isAssignableFrom(type.getInputWrapper())) {
else if (Mono.class.isAssignableFrom(this.type.getInputWrapper())) {
target = (S) new MonoToFluxFunction((Function) target);
}
else if (target instanceof Consumer) {

50
spring-cloud-function-core/src/main/java/org/springframework/cloud/function/core/MonoSupplier.java Normal file
View File

@@ -0,0 +1,50 @@
/*
* Copyright 2012-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.cloud.function.core;
import java.util.function.Supplier;
import reactor.core.publisher.Mono;
/**
* {@link Supplier} implementation that wraps a target Supplier so that the target's
* simple output type will be wrapped in a {@link Mono} instance.
*
* @param <T> output type of target supplier
* @author Mark Fisher
*/
public class MonoSupplier<T> implements Supplier<Mono<T>>, FluxWrapper<Supplier<T>> {
private final Supplier<T> supplier;
public MonoSupplier(Supplier<T> supplier) {
this.supplier = supplier;
}
@Override
public Supplier<T> getTarget() {
return this.supplier;
}
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public Mono<T> get() {
Object result = this.supplier.get();
return Mono.just((T) result);
}
}