Examples of com.opengamma.engine.view.client.ViewClient

Package com.opengamma.engine.view.client

Examples of com.opengamma.engine.view.client.ViewClient

com.opengamma.engine.view.client.ViewClient
Represents a managed client of a specific view process in the context of a particular user. This is the unit of external interaction for accessing computation results.
The client begins detached from any particular view process. In order to receive results, it must be attached to a view process. This creates demand for the process to execute, ensuring that it remains executing while the client is attached.
If the application requires asynchronous updates, it must set a result listener. This receives notifications of events from the view process. The result mode for this client may be controlled using {@link #setResultMode(ViewResultMode)}; this allows unwanted types of result to be filtered out, potentially avoiding the overhead of unnecessary serialisation.
The application may poll for the latest full result by calling {@link #getLatestResult()}. Listeners can be set or changed even when the client is detached from a view process; this allows the necessary listeners to be in place before results commence.
The per-client flow of results is controlled through {@link #pause()} and {@link #resume()}. By default, results will flow immediately, but the client may be paused before attaching it to a view process.
When results are paused, they are incrementally batched to be delivered as a single, collapsed result when they are resumed. This result is specific to the individual client that has been paused.
Use {@link #setUpdatePeriod(long)} to throttle the frequency of updates exposed through this client.
Always call {@link #shutdown()} from any state to allow resources associated with the managed view to be releasedwhen the client is no longer required. Without this, the view process may continue executing indefinitely.


  @Path("{viewId}/pauseOrResume")
  @PUT
  public Response pauseOrResumeView(@PathParam("viewId") String viewId,
                                    @FormParam("state") String state) {
    ViewClient viewClient = _viewManager.getViewCient(viewId);
    state = StringUtils.stripToNull(state);
    Response response = Response.status(Response.Status.BAD_REQUEST).build();
    if (state != null) {
      ViewClientState currentState = viewClient.getState();
      state = state.toUpperCase();
      switch (state) {
        case "PAUSE":
        case "P":
          if (currentState != ViewClientState.TERMINATED) {
            viewClient.pause();
            response = Response.ok().build();
          }
          break;
        case "RESUME":
        case "R":
          if (currentState != ViewClientState.TERMINATED) {
            viewClient.resume();
            response = Response.ok().build();
          }
          break;
        default:
          s_logger.warn("client {} requesting for invalid view client state change to {}", viewId, state);

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        // Existing view is different - client is switching views
        shutDownWebView(webView);
        _clientViews.remove(remote.getId());
      }


      ViewClient viewClient = getViewProcessor().createViewClient(user);
      try {
        UniqueId viewDefinitionId = _aggregatedViewDefinitionManager.getViewDefinitionId(baseViewDefinitionId, aggregatorName);
        webView = new WebView(getLocalSession(), remote, viewClient, baseViewDefinitionId, aggregatorName, viewDefinitionId,
            executionOptions, user, getExecutorService(), getResultConverterCache(), getComputationTargetResolver());
      } catch (Exception e) {
        _aggregatedViewDefinitionManager.releaseViewDefinition(baseViewDefinitionId, aggregatorName);
        viewClient.shutdown();
        throw new OpenGammaRuntimeException("Error attaching client to view definition '" + baseViewDefinitionId + "'", e);
      }
      _clientViews.put(remote.getId(), webView);
    }
  }

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    final UniqueId viewClientId = UniqueId.parse(viewClientIdString);
    final DataViewClientResource viewClientResource = _createdViewClients.get(viewClientId);
    if (viewClientResource != null) {
      return viewClientResource;
    }
    final ViewClient viewClient = getViewProcessor().getViewClient(viewClientId);
    final URI viewProcessorUri = getViewProcessorUri(uriInfo);
    return createViewClientResource(viewClient, viewProcessorUri);
  }

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  @POST
  @Path(PATH_CLIENTS)
  @Consumes(FudgeRest.MEDIA)
  public Response createViewClient(@Context final UriInfo uriInfo, final UserPrincipal user) {
    final ViewClient client = getViewProcessor().createViewClient(user);
    final URI viewProcessorUri = getViewProcessorUri(uriInfo);
    // Required for heartbeating, but also acts as an optimisation for getViewClient because view clients created
    // through the REST API should be accessed again through the same API, potentially many times.
    final DataViewClientResource viewClientResource = createViewClientResource(client, viewProcessorUri);
    _createdViewClients.put(client.getUniqueId(), viewClientResource);
    final URI createdUri = uriClient(uriInfo.getRequestUri(), client.getUniqueId());
    return responseCreated(createdUri);
  }

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                                              versionCorrection,
                                              _positionSource,
                                              _securitySource,
                                              _portfolioResolutionExecutor);
    // TODO something a bit more sophisticated with the executor
    ViewClient viewClient = _viewProcessor.createViewClient(user);
    s_logger.debug("Client ID {} creating new view with ID {}", clientId, viewId);
    ViewportListener viewportListener = new LoggingViewportListener(viewClient);
    PortfolioEntityExtractor entityExtractor = new PortfolioEntityExtractor(versionCorrection, _securityMaster);
    // TODO add filtering change listener to portfolio master which calls portfolioChanged() on the outer view
    boolean primitivesOnly = portfolioId == null;

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   */
  public void removeViewClient(final UniqueId clientId) {
    ArgumentChecker.notNull(clientId, "clientId");
    checkIdScheme(clientId, CLIENT_SCHEME);
    s_logger.info("Removing view client {}", clientId);
    final ViewClient client = _allClientsById.remove(clientId);
    if (client == null) {
      throw new DataNotFoundException("View client not found: " + clientId);
    }
    detachClientFromViewProcess(clientId);
    _viewProcessorEventListenerRegistry.notifyViewClientRemoved(clientId);

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    _calcConfigByViewProcessId.remove(viewProcessId);
  }


  @Override
  public void notifyViewClientAdded(UniqueId viewClientId) {
    ViewClient viewClient = _viewProcessor.getViewClient(viewClientId);
    ViewClientMBeanImpl viewClientBean = new ViewClientMBeanImpl(viewClient);
    try {
      registerViewClient(viewClientBean);
    } catch (Exception e) {
      s_logger.warn("Error registering view client for management for " + viewClientBean.getObjectName() + ". Error was " + e.getMessage(), e);

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  public void testRegistrationServiceListenersForViewClientAdded() throws Exception {
    ViewProcessorImpl viewProcessor = _env.getViewProcessor();
    viewProcessor.start();
    ManagementService.registerMBeans(viewProcessor, _statisticsProvider, _mBeanServer);
    assertMBeanCount(MBEANS_IN_TEST_VIEWPROCESSOR);
    ViewClient client1 = viewProcessor.createViewClient(UserPrincipal.getTestUser());
    assertMBeanCount(MBEANS_IN_TEST_VIEWPROCESSOR + 1);
    ViewClient client2 = viewProcessor.createViewClient(UserPrincipal.getTestUser());
    assertMBeanCount(MBEANS_IN_TEST_VIEWPROCESSOR + 2);
    client1.shutdown();
    assertMBeanCount(MBEANS_IN_TEST_VIEWPROCESSOR + 1);
    client2.shutdown();
    assertMBeanCount(MBEANS_IN_TEST_VIEWPROCESSOR);
  }

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  private void addAnotherView(ViewProcessorImpl viewprocessor) {
    ViewDefinition anotherDefinition = new ViewDefinition(UniqueId.of("boo", "far"), ANOTHER_TEST_VIEW, ViewProcessorTestEnvironment.TEST_USER);
    anotherDefinition.addViewCalculationConfiguration(_env.getViewDefinition().getCalculationConfiguration(ViewProcessorTestEnvironment.TEST_CALC_CONFIG_NAME));
    _env.getMockViewDefinitionRepository().put(anotherDefinition);
    ViewClient client = viewprocessor.createViewClient(ViewProcessorTestEnvironment.TEST_USER);
    client.attachToViewProcess(anotherDefinition.getUniqueId(), ExecutionOptions.infinite(MarketData.live()), false);
  }

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    final ViewProcessorTestEnvironment env = new ViewProcessorTestEnvironment();
    env.init();
    final ViewProcessorImpl vp = env.getViewProcessor();
    vp.start();


    final ViewClient client = vp.createViewClient(ViewProcessorTestEnvironment.TEST_USER);
    final TestViewResultListener resultListener = new TestViewResultListener();
    client.setResultListener(resultListener);
    client.attachToViewProcess(UniqueId.of("not", "here"), ExecutionOptions.infinite(MarketData.live(), ExecutionFlags.none().get()));
  }

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