How to use

add

method

in

org.glassfish.jersey.media.sse.SseBroadcaster

/**
 * Get the new SSE message stream channel.
 *
 * @return new SSE message stream channel.
 */
@GET
@Produces(SseFeature.SERVER_SENT_EVENTS)
public EventOutput getMessageStream() {
  LOGGER.info("--> SSE connection received.");
  final EventOutput eventOutput = new EventOutput();
  broadcaster.add(eventOutput);
  return eventOutput;
}

@Path("process/{id}")
@Produces(SseFeature.SERVER_SENT_EVENTS)
@GET
public EventOutput getProgress(@PathParam("id") int id,
                @DefaultValue("false") @QueryParam("testSource") boolean testSource) {
  final Process process = processes.get(id);
  if (process != null) {
    if (testSource) {
      process.release();
    }
    final EventOutput eventOutput = new EventOutput();
    process.getBroadcaster().add(eventOutput);
    return eventOutput;
  } else {
    throw new NotFoundException();
  }
}

@Override
public <OUT extends ChunkedOutput<OutboundEvent>> boolean add(OUT chunkedOutput) {
 outputs.put((TerracottaEventOutput) chunkedOutput, new TerracottaEventOutputFlushingMetadata());
 return super.add(chunkedOutput);
}

protected void activate() {
  broadcaster = new SseBroadcaster();
  broadcaster.add(this);
}

@GET
@Path("/events.stream")
@Produces(SseFeature.SERVER_SENT_EVENTS)
@ApiOperation(value = "Get Event Stream of Application Events", notes = "Returns a continuous stream of application events using Server-Sent Events.")
public EventOutput errors() {
  final EventOutput eventOutput = new EventOutput();
  BROADCASTER.add(eventOutput);
  return eventOutput;
}

/**
 * Creates a subscription for the stream of sitemap events.
 *
 * @return a subscription id
 */
@POST
@Path(SEGMENT_EVENTS + "/subscribe")
@ApiOperation(value = "Creates a sitemap event subscription.")
@ApiResponses(value = { @ApiResponse(code = 201, message = "Subscription created.") })
public Object createEventSubscription() {
  String subscriptionId = subscriptions.createSubscription(this);
  final EventOutput eventOutput = new SitemapEventOutput(subscriptions, subscriptionId);
  broadcaster.add(eventOutput);
  eventOutputs.put(subscriptionId, eventOutput);
  URI uri = uriInfo.getBaseUriBuilder().path(PATH_SITEMAPS).path(SEGMENT_EVENTS).path(subscriptionId).build();
  return Response.created(uri);
}

@Activate
protected void activate() {
  broadcaster = new SseBroadcaster();
  broadcaster.add(this);
  // The clean SSE subscriptions job sends an ALIVE event to all subscribers. This will trigger
  // an exception when the subscriber is dead, leading to the release of the SSE subscription
  // on server side.
  // In practice, the exception occurs only after the sending of a second ALIVE event. So this
  // will require two runs of the job to release an SSE subscription.
  // The clean SSE subscriptions job is run every 5 minutes.
  cleanSubscriptionsJob = scheduler.scheduleAtFixedRate(() -> {
    logger.debug("Run clean SSE subscriptions job");
    if (subscriptions != null) {
      subscriptions.checkAliveClients();
    }
  }, 1, 5, TimeUnit.MINUTES);
}

/**
 * Creates a subscription for the stream of sitemap events.
 *
 * @return a subscription id
 */
@POST
@Path(SEGMENT_EVENTS + "/subscribe")
@ApiOperation(value = "Creates a sitemap event subscription.")
@ApiResponses(value = { @ApiResponse(code = 201, message = "Subscription created."),
    @ApiResponse(code = 503, message = "Subscriptions limit reached.") })
public Object createEventSubscription() {
  String subscriptionId = subscriptions.createSubscription(this);
  if (subscriptionId == null) {
    return JSONResponse.createResponse(Status.SERVICE_UNAVAILABLE, null,
        "Max number of subscriptions is reached.");
  }
  final EventOutput eventOutput = new SitemapEventOutput(subscriptions, subscriptionId);
  broadcaster.add(eventOutput);
  eventOutputs.put(subscriptionId, eventOutput);
  URI uri = uriInfo.getBaseUriBuilder().path(PATH_SITEMAPS).path(SEGMENT_EVENTS).path(subscriptionId).build();
  logger.debug("Client from IP {} requested new subscription => got id {}.", request.getRemoteAddr(),
      subscriptionId);
  return Response.created(uri);
}

broadcaster.add(eventOutput);

broadcaster.add(eventOutput);

broadcaster.add(eventOutput);
return eventOutput;