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Posted to hdfs-commits@hadoop.apache.org by um...@apache.org on 2012/04/19 04:41:32 UTC
svn commit: r1327790 -
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsDataInputStream.java
Author: umamahesh
Date: Thu Apr 19 02:41:32 2012
New Revision: 1327790
URL: http://svn.apache.org/viewvc?rev=1327790&view=rev
Log:
iHDFS-3282. Expose getFileLength API. Contributed by Uma Maheswara Rao G.
Added:
hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsDataInputStream.java
Added: hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsDataInputStream.java
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsDataInputStream.java?rev=1327790&view=auto
==============================================================================
--- hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsDataInputStream.java (added)
+++ hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsDataInputStream.java Thu Apr 19 02:41:32 2012
@@ -0,0 +1,71 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs.client;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.fs.FSDataInputStream;
+import org.apache.hadoop.hdfs.DFSInputStream;
+import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
+import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
+import org.apache.hadoop.hdfs.protocol.LocatedBlock;
+
+/**
+ * The Hdfs implementation of {@link FSDataInputStream}.
+ */
+@InterfaceAudience.Public
+@InterfaceStability.Evolving
+public class HdfsDataInputStream extends FSDataInputStream {
+ public HdfsDataInputStream(DFSInputStream in) throws IOException {
+ super(in);
+ }
+
+ /**
+ * Get the datanode from which the stream is currently reading.
+ */
+ public DatanodeInfo getCurrentDatanode() {
+ return ((DFSInputStream) in).getCurrentDatanode();
+ }
+
+ /**
+ * Get the block containing the target position.
+ */
+ public ExtendedBlock getCurrentBlock() {
+ return ((DFSInputStream) in).getCurrentBlock();
+ }
+
+ /**
+ * Get the collection of blocks that has already been located.
+ */
+ public synchronized List<LocatedBlock> getAllBlocks() throws IOException {
+ return ((DFSInputStream) in).getAllBlocks();
+ }
+
+ /**
+ * Get the visible length of the file. It will include the length of the last
+ * block even if that is in UnderConstruction state.
+ *
+ * @return The visible length of the file.
+ */
+ public long getVisibleLength() throws IOException {
+ return ((DFSInputStream) in).getFileLength();
+ }
+}