本文整理匯總了Java中org.apache.hadoop.fs.FileUtil.replaceFile方法的典型用法代碼示例。如果您正苦於以下問題：Java FileUtil.replaceFile方法的具體用法？Java FileUtil.replaceFile怎麽用？Java FileUtil.replaceFile使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類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個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: completeHalfDoneAcceptRecovery
import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
/**
* 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);
}
}
示例2: unlinkFile
import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
/**
* 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;
}
}