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hold back flush till stream close (#51) #456

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hold back flush till stream close (#51) #456

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17 changes: 15 additions & 2 deletions ...c/main/java/com/mesosphere/dcos/cassandra/executor/backup/azure/PageBlobOutputStream.java
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ public class PageBlobOutputStream extends FilterOutputStream {
private long currentPageSize = PAGE_BLOB_PAGE_SIZE;

private volatile IOException lastError;
private boolean closed = false;

/**
* Creates an output stream filter built on top of the Azure
Expand Down Expand Up @@ -63,22 +64,34 @@ public void write(int b) throws IOException {
internalWrite(b);
}

@Override
public void flush() throws IOException {
// cannot flush untill close
}

@Override
public void close() throws IOException {

this.checkStreamState();
if(closed)
return;

// top off page size
// flush write does NOT occur unless full page is written
if (count < currentPageSize) {
byte[] pad = new byte[(int) (currentPageSize - count)];
writePad(pad);
}
super.close();

try {
super.flush();
super.close();
} finally {
closed = true;
}
uploadMetadata();
}


private void writePad(byte[] pad) throws IOException {
out.write(pad);
}
Expand Down