NullStreamConfigProvider.java example

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distributedlog-master
/**
 * 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 com.twitter.distributedlog.service.config;

import com.google.common.base.Optional;

import com.twitter.distributedlog.config.DynamicDistributedLogConfiguration;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * For all streams return an absent configuration.
 */
public class NullStreamConfigProvider implements StreamConfigProvider {
    static final Logger LOG = LoggerFactory.getLogger(NullStreamConfigProvider.class);

    private static final Optional<DynamicDistributedLogConfiguration> nullConf =
            Optional.<DynamicDistributedLogConfiguration>absent();

    @Override
    public Optional<DynamicDistributedLogConfiguration> getDynamicStreamConfig(String streamName) {
        return nullConf;
    }
}