本文整理汇总了Java中org.apache.hadoop.hdfs.server.namenode.TestFileTruncate类的典型用法代码示例。如果您正苦于以下问题：Java TestFileTruncate类的具体用法？Java TestFileTruncate怎么用？Java TestFileTruncate使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
TestFileTruncate类属于org.apache.hadoop.hdfs.server.namenode包，在下文中一共展示了TestFileTruncate类的3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: startRollingUpgrade
import org.apache.hadoop.hdfs.server.namenode.TestFileTruncate; //导入依赖的package包/类
private static void startRollingUpgrade(Path foo, Path bar,
Path file, byte[] data,
MiniDFSCluster cluster) throws IOException {
final DistributedFileSystem dfs = cluster.getFileSystem();
//start rolling upgrade
dfs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
dfs.rollingUpgrade(RollingUpgradeAction.PREPARE);
dfs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
dfs.mkdirs(bar);
Assert.assertTrue(dfs.exists(foo));
Assert.assertTrue(dfs.exists(bar));
//truncate a file
final int newLength = DFSUtil.getRandom().nextInt(data.length - 1) + 1;
dfs.truncate(file, newLength);
TestFileTruncate.checkBlockRecovery(file, dfs);
AppendTestUtil.checkFullFile(dfs, file, newLength, data);
}
示例2: startRollingUpgrade
import org.apache.hadoop.hdfs.server.namenode.TestFileTruncate; //导入依赖的package包/类
private static void startRollingUpgrade(Path foo, Path bar,
Path file, byte[] data,
MiniDFSCluster cluster) throws IOException {
final DistributedFileSystem dfs = cluster.getFileSystem();
//start rolling upgrade
dfs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
dfs.rollingUpgrade(RollingUpgradeAction.PREPARE);
dfs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
dfs.mkdirs(bar);
Assert.assertTrue(dfs.exists(foo));
Assert.assertTrue(dfs.exists(bar));
//truncate a file
final int newLength = ThreadLocalRandom.current().nextInt(data.length - 1)
+ 1;
dfs.truncate(file, newLength);
TestFileTruncate.checkBlockRecovery(file, dfs);
AppendTestUtil.checkFullFile(dfs, file, newLength, data);
}
示例3: truncate
import org.apache.hadoop.hdfs.server.namenode.TestFileTruncate; //导入依赖的package包/类
private boolean truncate(long newLength, StringBuilder b) throws IOException {
final RandomAccessFile raf = new RandomAccessFile(localFile, "rw");
raf.setLength(newLength);
raf.close();
final boolean isReady = dfs.truncate(file, newLength);
b.append(", newLength=").append(newLength)
.append(", isReady=").append(isReady);
if (!isReady) {
TestFileTruncate.checkBlockRecovery(file, dfs, 100, 300L);
}
return isReady;
}