本文整理匯總了Java中org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus方法的典型用法代碼示例。如果您正苦於以下問題：Java DistributedFileSystem.getFileStatus方法的具體用法？Java DistributedFileSystem.getFileStatus怎麽用？Java DistributedFileSystem.getFileStatus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.hdfs.DistributedFileSystem的用法示例。
在下文中一共展示了DistributedFileSystem.getFileStatus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: checkNumCachedReplicas
import org.apache.hadoop.hdfs.DistributedFileSystem; //導入方法依賴的package包/類
private static void checkNumCachedReplicas(final DistributedFileSystem dfs,
final List<Path> paths, final int expectedBlocks,
final int expectedReplicas)
throws Exception {
int numCachedBlocks = 0;
int numCachedReplicas = 0;
for (Path p: paths) {
final FileStatus f = dfs.getFileStatus(p);
final long len = f.getLen();
final long blockSize = f.getBlockSize();
// round it up to full blocks
final long numBlocks = (len + blockSize - 1) / blockSize;
BlockLocation[] locs = dfs.getFileBlockLocations(p, 0, len);
assertEquals("Unexpected number of block locations for path " + p,
numBlocks, locs.length);
for (BlockLocation l: locs) {
if (l.getCachedHosts().length > 0) {
numCachedBlocks++;
}
numCachedReplicas += l.getCachedHosts().length;
}
}
LOG.info("Found " + numCachedBlocks + " of " + expectedBlocks + " blocks");
LOG.info("Found " + numCachedReplicas + " of " + expectedReplicas
+ " replicas");
assertEquals("Unexpected number of cached blocks", expectedBlocks,
numCachedBlocks);
assertEquals("Unexpected number of cached replicas", expectedReplicas,
numCachedReplicas);
}
示例2: testOpenFileWhenNNAndClientCrashAfterAddBlock
import org.apache.hadoop.hdfs.DistributedFileSystem; //導入方法依賴的package包/類
/** Test NN crash and client crash/stuck immediately after block allocation */
@Test(timeout = 100000)
public void testOpenFileWhenNNAndClientCrashAfterAddBlock() throws Exception {
cluster.getConfiguration(0).set(
DFSConfigKeys.DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_KEY, "1.0f");
String testData = "testData";
// to make sure we write the full block before creating dummy block at NN.
cluster.getConfiguration(0).setInt("io.bytes.per.checksum",
testData.length());
cluster.restartNameNode(0);
try {
cluster.waitActive();
cluster.transitionToActive(0);
cluster.transitionToStandby(1);
DistributedFileSystem dfs = cluster.getFileSystem(0);
String pathString = "/tmp1.txt";
Path filePath = new Path(pathString);
FSDataOutputStream create = dfs.create(filePath,
FsPermission.getDefault(), true, 1024, (short) 3, testData.length(),
null);
create.write(testData.getBytes());
create.hflush();
long fileId = ((DFSOutputStream)create.
getWrappedStream()).getFileId();
FileStatus fileStatus = dfs.getFileStatus(filePath);
DFSClient client = DFSClientAdapter.getClient(dfs);
// add one dummy block at NN, but not write to DataNode
ExtendedBlock previousBlock =
DFSClientAdapter.getPreviousBlock(client, fileId);
DFSClientAdapter.getNamenode(client).addBlock(
pathString,
client.getClientName(),
new ExtendedBlock(previousBlock),
new DatanodeInfo[0],
DFSClientAdapter.getFileId((DFSOutputStream) create
.getWrappedStream()), null);
cluster.restartNameNode(0, true);
cluster.restartDataNode(0);
cluster.transitionToActive(0);
// let the block reports be processed.
Thread.sleep(2000);
FSDataInputStream is = dfs.open(filePath);
is.close();
dfs.recoverLease(filePath);// initiate recovery
assertTrue("Recovery also should be success", dfs.recoverLease(filePath));
} finally {
cluster.shutdown();
}
}