bharatviswa504 commented on a change in pull request #345: HDDS-2703.
OzoneFSInputStream to support ByteBufferReadable
URL: https://github.com/apache/hadoop-ozone/pull/345#discussion_r357880290
##########
File path:
hadoop-ozone/ozonefs/src/main/java/org/apache/hadoop/fs/ozone/OzoneFSInputStream.java
##########
@@ -76,4 +81,39 @@ public boolean seekToNewSource(long targetPos) throws
IOException {
public int available() throws IOException {
return inputStream.available();
}
+
+ /**
+ * @param buf the ByteBuffer to receive the results of the read operation.
+ * @return the number of bytes read, possibly zero, or -1 if
+ * reach end-of-stream
+ * @throws IOException if there is some error performing the read
+ */
+ @Override
+ public int read(ByteBuffer buf) throws IOException {
+
+ int bufInitPos = buf.position();
+ int readLen = Math.min(buf.remaining(), inputStream.available());
+
+ byte[] readData = new byte[readLen];
+ int bytesRead = inputStream.read(readData, bufInitPos, readLen);
+ buf.put(readData);
+
+ return bytesRead;
+ }
+
+ /**
+ * Query the stream for a specific capability.
+ *
+ * @param capability string to query the stream support for.
+ * @return True if the stream supports capability.
+ */
+ @Override
+ public boolean hasCapability(String capability) {
+ switch (StringUtils.toLowerCase(capability)) {
+ case "in:readbytebuffer":
Review comment:
If it is something we want to support, can we address this in new Jira.
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