com.github.enadim.spring.cloud.ribbon.predicate.DiscoveryEnabledServerPredicate Maven / Gradle / Ivy
/*
* Copyright (c) 2017 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 com.github.enadim.spring.cloud.ribbon.predicate;
import com.netflix.loadbalancer.PredicateKey;
import com.netflix.niws.loadbalancer.DiscoveryEnabledNIWSServerList;
import com.netflix.niws.loadbalancer.DiscoveryEnabledServer;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
/**
* Convenient class for predicates that are based on {@link DiscoveryEnabledServer} created by the {@link DiscoveryEnabledNIWSServerList}.
* {@link DiscoveryEnabledNIWSServerList}.
* Concrete implementation needs to implement the {@link #doApply(DiscoveryEnabledServer)} method.
*
* @author Nadim Benabdenbi
*/
public abstract class DiscoveryEnabledServerPredicate extends NullSafeServerPredicate {
/**
* {@inheritDoc}
*/
@Override
@SuppressFBWarnings("BC_UNCONFIRMED_CAST_OF_RETURN_VALUE")
protected boolean doApply(PredicateKey input) {
return input.getServer() instanceof DiscoveryEnabledServer
&& doApply((DiscoveryEnabledServer) input.getServer());
}
/**
* Tests if {@link DiscoveryEnabledServer} matches this predicate.
*
* @param server the discovered server
* @return {@code true} if the server matches the predicate otherwise {@code false}
* @see #apply(PredicateKey)
*/
protected abstract boolean doApply(DiscoveryEnabledServer server);
}