RegExceptionHandler.java

/**
 * Copyright 2016 vip.com.
 * <p>
 * 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.
 * </p>
 */

package com.vip.saturn.job.reg.exception;

import org.apache.zookeeper.KeeperException.ConnectionLossException;
import org.apache.zookeeper.KeeperException.NoNodeException;
import org.apache.zookeeper.KeeperException.NodeExistsException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 抛出RegException的异常处理类.
 * 
 * 
 */
public final class RegExceptionHandler {
	static Logger log = LoggerFactory.getLogger(RegExceptionHandler.class);

    private RegExceptionHandler() {
    }
    
    /**
     * 处理掉中断和连接失效异常并继续抛出RegException.
     * 
     * @param cause 待处理的异常.
     */
    public static void handleException(final Exception cause) {
        if (isIgnoredException(cause) || isIgnoredException(cause.getCause())) {
            log.debug("Elastic job: ignored exception for: {}", cause.getMessage());
        } else if (cause instanceof InterruptedException) {
            Thread.currentThread().interrupt();
        } else {
            throw new RegException(cause);
        }
    }
    
    private static boolean isIgnoredException(final Throwable cause) {
        if (null == cause) {
            return false;
        }
        return cause instanceof ConnectionLossException || cause instanceof NoNodeException || cause instanceof NodeExistsException;
    }
}