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Java FileUtil.replaceFile方法代码示例

本文整理汇总了Java中org.apache.hadoop.fs.FileUtil.replaceFile方法的典型用法代码示例。如果您正苦于以下问题:Java FileUtil.replaceFile方法的具体用法?Java FileUtil.replaceFile怎么用?Java FileUtil.replaceFile使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在org.apache.hadoop.fs.FileUtil的用法示例。


在下文中一共展示了FileUtil.replaceFile方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: completeHalfDoneAcceptRecovery

import org.apache.hadoop.fs.FileUtil; //导入方法依赖的package包/类
/**
 * In the case the node crashes in between downloading a log segment
 * and persisting the associated paxos recovery data, the log segment
 * will be left in its temporary location on disk. Given the paxos data,
 * we can check if this was indeed the case, and "roll forward"
 * the atomic operation.
 * 
 * See the inline comments in
 * {@link #acceptRecovery(RequestInfo, SegmentStateProto, URL)} for more
 * details.
 *
 * @throws IOException if the temporary file is unable to be renamed into
 * place
 */
private void completeHalfDoneAcceptRecovery(
    PersistedRecoveryPaxosData paxosData) throws IOException {
  if (paxosData == null) {
    return;
  }

  long segmentId = paxosData.getSegmentState().getStartTxId();
  long epoch = paxosData.getAcceptedInEpoch();
  
  File tmp = storage.getSyncLogTemporaryFile(segmentId, epoch);
  
  if (tmp.exists()) {
    File dst = storage.getInProgressEditLog(segmentId);
    LOG.info("Rolling forward previously half-completed synchronization: " +
        tmp + " -> " + dst);
    FileUtil.replaceFile(tmp, dst);
  }
}
 
开发者ID:naver,项目名称:hadoop,代码行数:33,代码来源:Journal.java

示例2: unlinkFile

import org.apache.hadoop.fs.FileUtil; //导入方法依赖的package包/类
/**
 * Copy specified file into a temporary file. Then rename the
 * temporary file to the original name. This will cause any
 * hardlinks to the original file to be removed. The temporary
 * files are created in the same directory. The temporary files will
 * be recovered (especially on Windows) on datanode restart.
 */
private void unlinkFile(File file, Block b) throws IOException {
  File tmpFile = DatanodeUtil.createTmpFile(b, DatanodeUtil.getUnlinkTmpFile(file));
  try {
    FileInputStream in = new FileInputStream(file);
    try {
      FileOutputStream out = new FileOutputStream(tmpFile);
      try {
        IOUtils.copyBytes(in, out, 16*1024);
      } finally {
        out.close();
      }
    } finally {
      in.close();
    }
    if (file.length() != tmpFile.length()) {
      throw new IOException("Copy of file " + file + " size " + file.length()+
                            " into file " + tmpFile +
                            " resulted in a size of " + tmpFile.length());
    }
    FileUtil.replaceFile(tmpFile, file);
  } catch (IOException e) {
    boolean done = tmpFile.delete();
    if (!done) {
      DataNode.LOG.info("detachFile failed to delete temporary file " +
                        tmpFile);
    }
    throw e;
  }
}
 
开发者ID:naver,项目名称:hadoop,代码行数:37,代码来源:ReplicaInfo.java


注:本文中的org.apache.hadoop.fs.FileUtil.replaceFile方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。