com.netflix.hystrix.contrib.javanica.command.AsyncResult Maven / Gradle / Ivy
/**
* Copyright 2012 Netflix, Inc.
*
* 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 com.netflix.hystrix.contrib.javanica.command;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
/**
* Fake implementation of {@link Future}. Can be used for method signatures
* which are declared with a Future return type for asynchronous execution.
* Provides abstract {@link #invoke()} method to wrap some logic for an asynchronous call.
*
* @param the type of result
*/
public abstract class AsyncResult implements Future, ClosureCommand {
private static final String ERROR_MSG = "AsyncResult is just a stab and cannot be used as complete implementation of Future";
@Override
public boolean cancel(boolean mayInterruptIfRunning) throws UnsupportedOperationException {
throw new UnsupportedOperationException(ERROR_MSG);
}
@Override
public boolean isCancelled() throws UnsupportedOperationException {
throw new UnsupportedOperationException(ERROR_MSG);
}
@Override
public boolean isDone() throws UnsupportedOperationException {
throw new UnsupportedOperationException(ERROR_MSG);
}
@Override
public T get() throws UnsupportedOperationException {
throw new UnsupportedOperationException(ERROR_MSG);
}
@Override
public T get(long timeout, TimeUnit unit) throws UnsupportedOperationException {
throw new UnsupportedOperationException(ERROR_MSG);
}
/**
* {@inheritDoc}.
*/
@Override
public abstract T invoke();
}