Example usage for io.netty.channel FileRegion refCnt

Introduction

In this page you can find the example usage for io.netty.channel FileRegion refCnt.

Prototype

int refCnt();

Source Link

Document

Returns the reference count of this object.

Usage

From source file:org.apache.tajo.pullserver.HttpDataServerHandler.java

License:Apache License

private ChannelFuture sendFile(ChannelHandlerContext ctx, FileChunk file) throws IOException {
    RandomAccessFile raf;/*from w w w.j  a  va2  s .  c  om*/
    try {
        raf = new RandomAccessFile(file.getFile(), "r");
    } catch (FileNotFoundException fnfe) {
        return null;
    }

    ChannelFuture writeFuture;
    ChannelFuture lastContentFuture;
    if (ctx.pipeline().get(SslHandler.class) != null) {
        // Cannot use zero-copy with HTTPS.
        lastContentFuture = ctx
                .write(new HttpChunkedInput(new ChunkedFile(raf, file.startOffset(), file.length(), 8192)));
    } else {
        // No encryption - use zero-copy.
        final FileRegion region = new DefaultFileRegion(raf.getChannel(), file.startOffset(), file.length());
        writeFuture = ctx.write(region);
        lastContentFuture = ctx.write(LastHttpContent.EMPTY_LAST_CONTENT);
        writeFuture.addListener(new ChannelFutureListener() {
            public void operationComplete(ChannelFuture future) {
                if (region.refCnt() > 0) {
                    region.release();
                }
            }
        });
    }

    return lastContentFuture;
}

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