curator-master/curator-framework/src/main/java/org/apache/curator/framework/imps/BackgroundOperation.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.curator.framework.imps;

import org.apache.curator.framework.api.CuratorEventType;

interface BackgroundOperation<T> {
    public void performBackgroundOperation(OperationAndData<T> data) throws Exception;

    /**
     * Most events are delivered by operations themselves, so they know their event types.
     * But in occasional cases(says, closing or background exception), events are delivered
     * by curator framework.
     */
    CuratorEventType getBackgroundEventType();
}
