spring ListenableFutureReturnValueHandler 源码
spring ListenableFutureReturnValueHandler 代码
文件路径：/spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/ListenableFutureReturnValueHandler.java
/*
* Copyright 2002-2022 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
*
* https://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.messaging.handler.invocation;
import java.util.concurrent.CompletableFuture;
import org.springframework.core.MethodParameter;
import org.springframework.util.concurrent.ListenableFuture;
/**
* Support for {@link ListenableFuture} as a return value type.
*
* @author Sebastien Deleuze
* @since 4.2
* @deprecated as of 6.0, in favor of {@link CompletableFutureReturnValueHandler}
*/
@Deprecated
public class ListenableFutureReturnValueHandler extends AbstractAsyncReturnValueHandler {
@Override
public boolean supportsReturnType(MethodParameter returnType) {
return ListenableFuture.class.isAssignableFrom(returnType.getParameterType());
}
@Override
@SuppressWarnings("unchecked")
public ListenableFuture<?> toListenableFuture(Object returnValue, MethodParameter returnType) {
return (ListenableFuture<?>) returnValue;
}
@Override
public CompletableFuture<?> toCompletableFuture(Object returnValue, MethodParameter returnType) {
return ((ListenableFuture<?>) returnValue).completable();
}
}
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