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/*
 * Copyright (c) 2018 (https://github.com/hiwepy).
 *
 * 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.lmax.disruptor.biz.event.handler;

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

import com.lmax.disruptor.biz.event.DisruptorEvent;
import com.lmax.disruptor.biz.event.handler.chain.HandlerChain;

public abstract class AbstractEnabledEventHandler extends AbstractNameableEventHandler {

	protected final Logger LOG = LoggerFactory.getLogger(AbstractEnabledEventHandler.class);
	protected boolean enabled = true;

	protected abstract void doHandlerInternal(T event, HandlerChain handlerChain) throws Exception;

	@Override
	public void doHandler(T event, HandlerChain handlerChain) throws Exception {

		if (!isEnabled(event)) {
			LOG.debug("Handler '{}' is not enabled for the current event.  Proceeding without invoking this handler.",
					getName());
			// Proceed without invoking this handler...
			handlerChain.doHandler(event);
		} else {
			LOG.trace("Handler '{}' enabled.  Executing now.", getName());
			doHandlerInternal(event, handlerChain);
		}

	}
	
	protected boolean isEnabled(T event) throws Exception {
		return isEnabled();
	}

	public boolean isEnabled() {
		return enabled;
	}

	public void setEnabled(boolean enabled) {
		this.enabled = enabled;
	}

	

}