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HDFS-3282. Expose getFileLength API. Contributed by Uma Maheswara Rao G. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1327788 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Uma Maheswara Rao G 2012-04-19 02:34:44 +00:00
parent 4550627cab
commit c6d3537d33
4 changed files with 13 additions and 36 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -68,6 +68,8 @@ Trunk (unreleased changes)
HDFS-3292. Remove the deprecated DiskStatus, getDiskStatus(), getRawCapacity() and
getRawUsed() from DistributedFileSystem. (Arpit Gupta via szetszwo)
HDFS-3282. Expose getFileLength API. (umamahesh)
OPTIMIZATIONS
HDFS-2834. Add a ByteBuffer-based read API to DFSInputStream.

40
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
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@ -78,7 +78,6 @@ import org.apache.hadoop.fs.BlockLocation;
import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
import org.apache.hadoop.fs.ContentSummary;
import org.apache.hadoop.fs.CreateFlag;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileAlreadyExistsException;
import org.apache.hadoop.fs.FileSystem;
@ -91,6 +90,7 @@ import org.apache.hadoop.fs.ParentNotDirectoryException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.UnresolvedLinkException;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.client.HdfsDataInputStream;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocol.CorruptFileBlocks;
import org.apache.hadoop.hdfs.protocol.DSQuotaExceededException;
@ -1809,41 +1809,13 @@ public class DFSClient implements java.io.Closeable {
}
/**
* The Hdfs implementation of {@link FSDataInputStream}
* @deprecated use {@link HdfsDataInputStream} instead.
*/
@InterfaceAudience.Private
public static class DFSDataInputStream extends FSDataInputStream {
public DFSDataInputStream(DFSInputStream in)
throws IOException {
super(in);
}
/**
* Returns the datanode from which the stream is currently reading.
*/
public DatanodeInfo getCurrentDatanode() {
return ((DFSInputStream)in).getCurrentDatanode();
}
/**
* Returns the block containing the target position.
*/
public ExtendedBlock getCurrentBlock() {
return ((DFSInputStream)in).getCurrentBlock();
}
@Deprecated
public static class DFSDataInputStream extends HdfsDataInputStream {
/**
* Return collection of blocks that has already been located.
*/
synchronized List<LocatedBlock> getAllBlocks() throws IOException {
return ((DFSInputStream)in).getAllBlocks();
}
/**
* @return The visible length of the file.
*/
public long getVisibleLength() throws IOException {
return ((DFSInputStream)in).getFileLength();
public DFSDataInputStream(DFSInputStream in) throws IOException {
super(in);
}
}

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
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@ -224,7 +224,7 @@ public class DFSInputStream extends FSInputStream implements ByteBufferReadable
/**
* Return collection of blocks that has already been located.
*/
synchronized List<LocatedBlock> getAllBlocks() throws IOException {
public synchronized List<LocatedBlock> getAllBlocks() throws IOException {
return getBlockRange(0, getFileLength());
}

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java
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@ -46,6 +46,7 @@ import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.fs.RemoteIterator;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DFSClient.DFSDataInputStream;
import org.apache.hadoop.hdfs.client.HdfsDataInputStream;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.DirectoryListing;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
@ -194,8 +195,9 @@ public class DistributedFileSystem extends FileSystem {
return dfs.recoverLease(getPathName(f));
}
@SuppressWarnings("deprecation")
@Override
public FSDataInputStream open(Path f, int bufferSize) throws IOException {
public HdfsDataInputStream open(Path f, int bufferSize) throws IOException {
statistics.incrementReadOps(1);
return new DFSClient.DFSDataInputStream(
dfs.open(getPathName(f), bufferSize, verifyChecksum));
@ -623,6 +625,7 @@ public class DistributedFileSystem extends FileSystem {
// We do not see a need for user to report block checksum errors and do not
// want to rely on user to report block corruptions.
@Deprecated
@SuppressWarnings("deprecation")
public boolean reportChecksumFailure(Path f,
FSDataInputStream in, long inPos,
FSDataInputStream sums, long sumsPos) {