/*
 * Copyright 2014 NAVER Corp.
 *
 * 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.navercorp.pinpoint.collector.cluster.route;

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.navercorp.pinpoint.collector.cluster.route.filter.RouteFilter;

public class DefaultRouteFilterChain<T extends RouteEvent> implements RouteFilterChain<T> {

    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    private final List<RouteFilter<T>> filterList;
    
    public DefaultRouteFilterChain() {
        this.filterList = new CopyOnWriteArrayList<>();
    }
    
    public DefaultRouteFilterChain(List<RouteFilter<T>> filterList) {
        this.filterList = new CopyOnWriteArrayList<>(filterList);
    }

    @Override
    public void addLast(RouteFilter<T> filter) {
        filterList.add(filter);
    }

    @Override
    public void doEvent(T event) {
        for (RouteFilter<T> filter : filterList) {
            try {
                filter.doEvent(event);
            } catch (Exception e) {
                if (logger.isWarnEnabled()) {
                    logger.warn(filter.getClass().getSimpleName() + " filter occurred exception. Error:" + e.getMessage() + ".", e);
                }
            }
        }
    }

}