curator-master/curator-framework/src/main/java/org/apache/curator/framework/imps/FailedOperationManager.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 com.google.common.annotations.VisibleForTesting;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.utils.ThreadUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

abstract class FailedOperationManager<T> {
    private final Logger log = LoggerFactory.getLogger(getClass());
    protected final CuratorFramework client;

    @VisibleForTesting
    volatile FailedOperationManagerListener<T> debugListener = null;

    interface FailedOperationManagerListener<T> {
        public void pathAddedForGuaranteedOperation(T detail);
    }

    FailedOperationManager(CuratorFramework client) {
        this.client = client;
    }

    void addFailedOperation(T details) {
        if (debugListener != null) {
            debugListener.pathAddedForGuaranteedOperation(details);
        }

        if (client.getState() == CuratorFrameworkState.STARTED) {
            log.debug("Details being added to guaranteed operation set: " + details);
            try {
                executeGuaranteedOperationInBackground(details);
            } catch (Exception e) {
                ThreadUtils.checkInterrupted(e);
                addFailedOperation(details);
            }
        }
    }

    protected abstract void executeGuaranteedOperationInBackground(T details) throws Exception;
}
