Examples with CompositeWriter com.linkedin.r2.message.stream.entitystream.CompositeWriter used on opensource projects

Example 1 with CompositeWriter

use of com.linkedin.r2.message.stream.entitystream.CompositeWriter in project rest.li by linkedin.

the class ClientStreamCompressionFilter method onStreamRequest.

/**
   * Optionally compresses outgoing Stream requests
   * */
public void onStreamRequest(StreamRequest req, final RequestContext requestContext, final Map<String, String> wireAttrs, final NextFilter<StreamRequest, StreamResponse> nextFilter) {
    //Set accepted encoding for compressed response
    String operation = (String) requestContext.getLocalAttr(R2Constants.OPERATION);
    if (!_acceptEncodingHeader.isEmpty() && _helper.shouldCompressResponseForOperation(operation)) {
        CompressionOption responseCompressionOverride = (CompressionOption) requestContext.getLocalAttr(R2Constants.RESPONSE_COMPRESSION_OVERRIDE);
        req = addResponseCompressionHeaders(responseCompressionOverride, req);
    }
    if (_requestContentEncoding != StreamEncodingType.IDENTITY) {
        final StreamRequest request = req;
        final StreamingCompressor compressor = _requestContentEncoding.getCompressor(_executor);
        CompressionOption option = (CompressionOption) requestContext.getLocalAttr(R2Constants.REQUEST_COMPRESSION_OVERRIDE);
        if (option == null || option != CompressionOption.FORCE_OFF) {
            final int threshold = option == CompressionOption.FORCE_ON ? 0 : _requestCompressionConfig.getCompressionThreshold();
            PartialReader reader = new PartialReader(threshold, new Callback<EntityStream[]>() {

                @Override
                public void onError(Throwable ex) {
                    nextFilter.onError(ex, requestContext, wireAttrs);
                }

                @Override
                public void onSuccess(EntityStream[] result) {
                    if (result.length == 1) {
                        StreamRequest uncompressedRequest = request.builder().build(result[0]);
                        nextFilter.onRequest(uncompressedRequest, requestContext, wireAttrs);
                    } else {
                        StreamRequestBuilder builder = request.builder();
                        EntityStream compressedStream = compressor.deflate(EntityStreams.newEntityStream(new CompositeWriter(result)));
                        Map<String, String> headers = stripHeaders(builder.getHeaders(), HttpConstants.CONTENT_LENGTH);
                        StreamRequest compressedRequest = builder.setHeaders(headers).setHeader(HttpConstants.CONTENT_ENCODING, compressor.getContentEncodingName()).build(compressedStream);
                        nextFilter.onRequest(compressedRequest, requestContext, wireAttrs);
                    }
                }
            });
            req.getEntityStream().setReader(reader);
            return;
        }
    }
    nextFilter.onRequest(req, requestContext, wireAttrs);
}

Example 2 with CompositeWriter

use of com.linkedin.r2.message.stream.entitystream.CompositeWriter in project rest.li by linkedin.

the class ServerStreamCompressionFilter method onStreamResponse.

/**
   * Optionally compresses outgoing response
   * */
@Override
public void onStreamResponse(final StreamResponse res, final RequestContext requestContext, final Map<String, String> wireAttrs, final NextFilter<StreamRequest, StreamResponse> nextFilter) {
    StreamResponse response = res;
    try {
        String responseCompression = (String) requestContext.getLocalAttr(HttpConstants.ACCEPT_ENCODING);
        if (responseCompression == null) {
            throw new CompressionException(HttpConstants.ACCEPT_ENCODING + " not in local attribute.");
        }
        List<AcceptEncoding> parsedEncodings = AcceptEncoding.parseAcceptEncodingHeader(responseCompression, _supportedEncoding);
        StreamEncodingType selectedEncoding = AcceptEncoding.chooseBest(parsedEncodings);
        //Check if there exists an acceptable encoding
        if (selectedEncoding == null) {
            //Not acceptable encoding status
            response = new StreamResponseBuilder().setStatus(HttpConstants.NOT_ACCEPTABLE).build(EntityStreams.emptyStream());
        } else if (selectedEncoding != StreamEncodingType.IDENTITY) {
            final int threshold = (Integer) requestContext.getLocalAttr(HttpConstants.HEADER_RESPONSE_COMPRESSION_THRESHOLD);
            final StreamingCompressor compressor = selectedEncoding.getCompressor(_executor);
            PartialReader reader = new PartialReader(threshold, new Callback<EntityStream[]>() {

                @Override
                public void onError(Throwable ex) {
                    nextFilter.onError(ex, requestContext, wireAttrs);
                }

                @Override
                public void onSuccess(EntityStream[] results) {
                    if (// entity stream is less than threshold
                    results.length == 1) {
                        StreamResponse response = res.builder().build(results[0]);
                        nextFilter.onResponse(response, requestContext, wireAttrs);
                    } else {
                        EntityStream compressedStream = compressor.deflate(EntityStreams.newEntityStream(new CompositeWriter(results)));
                        StreamResponseBuilder builder = res.builder();
                        // remove original content-length header if presents.
                        if (builder.getHeader(HttpConstants.CONTENT_LENGTH) != null) {
                            Map<String, String> headers = stripHeaders(builder.getHeaders(), HttpConstants.CONTENT_LENGTH);
                            builder.setHeaders(headers);
                        }
                        StreamResponse response = builder.addHeaderValue(HttpConstants.CONTENT_ENCODING, compressor.getContentEncodingName()).build(compressedStream);
                        nextFilter.onResponse(response, requestContext, wireAttrs);
                    }
                }
            });
            res.getEntityStream().setReader(reader);
            return;
        }
    } catch (CompressionException e) {
        LOG.error(e.getMessage(), e.getCause());
    }
    nextFilter.onResponse(response, requestContext, wireAttrs);
}