BackendException.java example

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// Copyright 2017 JanusGraph 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 org.janusgraph.diskstorage;

/**
 * Exception thrown in the storage layer of the graph database.
 * <p/>
 * Such exceptions are typically caused by the underlying storage engine and re-thrown as {@link BackendException}.
 *
 * @author Matthias Bröcheler (me@matthiasb.com);
 */
public abstract class BackendException extends Exception {

    private static final long serialVersionUID = 4056436257763972423L;

    /**
     * @param msg Exception message
     */
    public BackendException(String msg) {
        super(msg);
    }

    /**
     * @param msg   Exception message
     * @param cause Cause of the exception
     */
    public BackendException(String msg, Throwable cause) {
        super(msg, cause);
    }

    /**
     * Constructs an exception with a generic message
     *
     * @param cause Cause of the exception
     */
    public BackendException(Throwable cause) {
        this("Exception in storage backend.", cause);
    }


}