StartupUtils.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.flink.runtime.util;

import java.util.List;

public class StartupUtils {
	
	/**
	 * A utility method to analyze the exceptions and collect the clauses
	 * 
	 * @param e  the root exception (Throwable) object
	 * @param causes  the list of exceptions that caused the root exceptions
	 * @return  a list of Throwable
	 */
	public static List<Throwable> getExceptionCauses(Throwable e, List<Throwable> causes) {
		if (e.getCause() == null) {
			return causes;
		} else {
			causes.add(e.getCause());
			getExceptionCauses(e.getCause(), causes);
		}
		return causes;
	}

}