org.jboss.arquillian.warp.spi.observer.RequestObserverChainManager Maven / Gradle / Ivy
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* Copyright 2012, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.jboss.arquillian.warp.spi.observer;
import java.util.Collection;
import java.util.Deque;
import org.jboss.arquillian.warp.RequestObserver;
/**
* Manages chain of {@link RequestObserver}s.
*
* @author Lukas Fryc
*/
public interface RequestObserverChainManager {
/**
*
* Manages observer chain.
*
*
*
* In modified collection, new observers might be added, observers might be removed or their behavior might be changed.
*
*
* @param observers collection of observers which were specified for given request
* @param expectedObserverType the type of observers which is expected during currently processed request
* @return modified collection of
*/
Deque manageObserverChain(Deque observers,
Class expectedObserverType);
/**
*
* Defines priority of observer service which specifies in which order will be {@link #manageObserverChain(Collection)}
* method applied on collection of request observers.
*
*
*
* DefaultRequestObserverService has priority 0 - no other observer can have this priority.
*
*
*
* Services with priority lower than zero will be applied after DefaultRequestObserverService; services with priority higher
* will be applied before.
*
*/
int priotity();
}