StaticZooKeeperConfigurationProvider.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.flume.node;

import org.apache.curator.framework.CuratorFramework;
import org.apache.flume.FlumeException;
import org.apache.flume.conf.FlumeConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class StaticZooKeeperConfigurationProvider extends
    AbstractZooKeeperConfigurationProvider {

  private static final Logger LOGGER = LoggerFactory
      .getLogger(StaticZooKeeperConfigurationProvider.class);

  public StaticZooKeeperConfigurationProvider(String agentName,
      String zkConnString, String basePath) {
    super(agentName, zkConnString, basePath);
  }

  @Override
  protected FlumeConfiguration getFlumeConfiguration() {
    try {
      CuratorFramework cf = createClient();
      cf.start();
      try {
        byte[] data = cf.getData().forPath(basePath + "/" + getAgentName());
        return configFromBytes(data);
      } finally {
        cf.close();
      }
    } catch (Exception e) {
      LOGGER.error("Error getting configuration info from Zookeeper", e);
      throw new FlumeException(e);
    }
  }

}