Examples of javax.ws.rs.core.StreamingOutput

javax.ws.rs.core.StreamingOutput
A type that may be used as a resource method return value or as the entity in a {@link Response} when the application wishes to stream the output.This is a lightweight alternative to a {@link javax.ws.rs.ext.MessageBodyWriter}. @see javax.ws.rs.ext.MessageBodyWriter @see javax.ws.rs.core.Response

        IOUtils.cleanup(LOG, in);
        IOUtils.cleanup(LOG, dfsclient);
        throw ioe;
      }
      final DFSDataInputStream dis = in;
      final StreamingOutput streaming = new StreamingOutput() {
        @Override
        public void write(final OutputStream out) throws IOException {
          final Long n = length.getValue();
          DFSDataInputStream dfsin = dis;
          DFSClient client = dfsclient;

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      final String js = JsonUtil.toJsonString(status, true);
      return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
    }
    case LISTSTATUS:
    {
      final StreamingOutput streaming = getListingStream(np, fullpath);
      return Response.ok(streaming).type(MediaType.APPLICATION_JSON).build();
    }
    case GETCONTENTSUMMARY:
    {
      final ContentSummary contentsummary = np.getContentSummary(fullpath);

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        HdfsFileStatus.EMPTY_NAME);


    // must save ugi because the streaming object will be executed outside
    // the remote user's ugi
    final UserGroupInformation ugi = UserGroupInformation.getCurrentUser();
    return new StreamingOutput() {
      @Override
      public void write(final OutputStream outstream) throws IOException {
        final PrintStream out = new PrintStream(outstream);
        out.println("{\"" + FileStatus.class.getSimpleName() + "es\":{\""
            + FileStatus.class.getSimpleName() + "\":[");

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      final String js = JsonUtil.toJsonString(status, true);
      return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
    }
    case LISTSTATUS:
    {
      final StreamingOutput streaming = getListingStream(np, fullpath);
      return Response.ok(streaming).type(MediaType.APPLICATION_JSON).build();
    }
    case GETCONTENTSUMMARY:
    {
      final ContentSummary contentsummary = np.getContentSummary(fullpath);

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  private static StreamingOutput getListingStream(final NamenodeProtocols np, 
      final String p) throws IOException {
    final DirectoryListing first = getDirectoryListing(np, p,
        HdfsFileStatus.EMPTY_NAME);


    return new StreamingOutput() {
      @Override
      public void write(final OutputStream outstream) throws IOException {
        final PrintStream out = new PrintStream(outstream);
        out.println("{\"" + FileStatus.class.getSimpleName() + "es\":{\""
            + FileStatus.class.getSimpleName() + "\":[");

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   public StreamingOutput getCustomer(@PathParam("id") int id) {
      final Customer customer = customerDB.get(id);
      if (customer == null) {
         throw new WebApplicationException(Response.Status.NOT_FOUND);
      }
      return new StreamingOutput() {
         public void write(OutputStream outputStream) throws IOException, WebApplicationException {
            outputCustomer(outputStream, customer);
         }
      };
   }

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      final Customer customer = customerDB.get(id);
      if (customer == null)
      {
         throw new WebApplicationException(Response.Status.NOT_FOUND);
      }
      return new StreamingOutput()
      {
         public void write(OutputStream outputStream) throws IOException, WebApplicationException
         {
            outputCustomer(outputStream, customer);
         }

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      final Customer customer = customerDB.get(id);
      if (customer == null)
      {
         throw new WebApplicationException(Response.Status.NOT_FOUND);
      }
      return new StreamingOutput()
      {
         public void write(OutputStream outputStream) throws IOException, WebApplicationException
         {
            outputCustomer(outputStream, customer);
         }

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            return Response.status(Status.NOT_FOUND).entity("User has no image.").build();
        }


        final ByteArrayInputStream in = new ByteArrayInputStream(image);


        StreamingOutput responseEntity = new StreamingOutput() {
            @Override
            public void write(OutputStream output) throws IOException, WebApplicationException {
                IOUtils.copy(in, output);
            }
        };

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@Path("/")
public class StreamingOutputTest extends JerseyTest {
    @GET
    @Path("wae")
    public StreamingOutput test2() {
        return new StreamingOutput() {
            public void write(OutputStream output) throws IOException {
                throw new WebApplicationException(Response.Status.BAD_GATEWAY.getStatusCode());
            }
        };
    }

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