void updateCounters() {
if (readBytesCounter == null) {
readBytesCounter = counterManager.findCounter(scheme, FileSystemCounter.BYTES_READ);
}
if (writeBytesCounter == null) {
writeBytesCounter = counterManager.findCounter(scheme, FileSystemCounter.BYTES_WRITTEN);
}
if (readOpsCounter == null) {
readOpsCounter = counterManager.findCounter(scheme, FileSystemCounter.READ_OPS);
}
if (largeReadOpsCounter == null) {
largeReadOpsCounter = counterManager.findCounter(scheme, FileSystemCounter.LARGE_READ_OPS);
}
if (writeOpsCounter == null) {
writeOpsCounter = counterManager.findCounter(scheme, FileSystemCounter.WRITE_OPS);
}
long readBytes = 0;
long writeBytes = 0;
long readOps = 0;
long largeReadOps = 0;
long writeOps = 0;
for (FileSystem.Statistics stat : stats) {
readBytes = readBytes + stat.getBytesRead();
writeBytes = writeBytes + stat.getBytesWritten();
readOps = readOps + stat.getReadOps();
largeReadOps = largeReadOps + stat.getLargeReadOps();
writeOps = writeOps + stat.getWriteOps();
}
readBytesCounter.setValue(readBytes);
writeBytesCounter.setValue(writeBytes);
readOpsCounter.setValue(readOps);
largeReadOpsCounter.setValue(largeReadOps);
writeOpsCounter.setValue(writeOps);
}
@Override
public synchronized int read() throws IOException {
if (closed) {
throw new IOException("Stream closed");
}
int result = -1;
if (pos < fileLength) {
if (pos > blockEnd) {
blockSeekTo(pos);
}
result = blockStream.read();
if (result >= 0) {
pos++;
}
}
if (stats != null & result >= 0) {
stats.incrementBytesRead(1);
}
return result;
}
@Override
public synchronized int read(byte buf[], int off, int len) throws IOException {
if (closed) {
throw new IOException("Stream closed");
}
if (pos < fileLength) {
if (pos > blockEnd) {
blockSeekTo(pos);
}
int realLen = Math.min(len, (int) (blockEnd - pos + 1));
int result = blockStream.read(buf, off, realLen);
if (result >= 0) {
pos += result;
}
if (stats != null && result > 0) {
stats.incrementBytesRead(result);
}
return result;
}
return -1;
}