@Override
 public void process(Exchange exchange) throws Exception {
   Message in = exchange.getIn();
   String filename = in.getBody(String.class);
   List<String> lines = Files.readAllLines(Paths.get(filename), Charset.defaultCharset());
   in.setBody(lines);
 }
 private void extractHeader(String headerMame, Message camelMessage, InternetHeaders headers) {
   String h = camelMessage.getHeader(headerMame, String.class);
   if (h != null) {
     headers.addHeader(headerMame, h);
     camelMessage.removeHeader(headerMame);
   }
 }
예제 #3
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  public void testSendingAMessageUsingMulticastReceivesItsOwnExchangeParallel() throws Exception {
    MockEndpoint resultEndpoint = getMockEndpoint("mock:result");

    resultEndpoint.expectsNoDuplicates(body());
    resultEndpoint.expectedMessageCount(4);

    // InOnly
    template.send(
        "direct:parallel",
        new Processor() {
          public void process(Exchange exchange) {
            Message in = exchange.getIn();
            in.setBody("James,Guillaume,Hiram,Rob");
            in.setHeader("foo", "bar");
          }
        });

    assertMockEndpointsSatisfied();

    List<Exchange> list = resultEndpoint.getReceivedExchanges();
    Set<Integer> numbersFound = new TreeSet<Integer>();
    final String[] names = {"James", "Guillaume", "Hiram", "Rob"};

    for (int i = 0; i < 4; i++) {
      Exchange exchange = list.get(i);
      Message in = exchange.getIn();
      Integer splitCounter = exchange.getProperty(Exchange.SPLIT_INDEX, Integer.class);
      numbersFound.add(splitCounter);
      assertEquals(names[splitCounter], in.getBody());
      assertProperty(exchange, Exchange.SPLIT_SIZE, 4);
    }

    assertEquals(4, numbersFound.size());
  }
예제 #4
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  public void testMessageDump() throws Exception {
    JAXBContext jaxb = JAXBContext.newInstance(MessageDump.class);
    Unmarshaller unmarshaller = jaxb.createUnmarshaller();

    CamelContext context = new DefaultCamelContext();
    context.start();

    message = new DefaultExchange(context).getIn();

    // xml message body
    message.setBody("Hello World");
    message.setHeader("foo", 123);

    String out = MessageHelper.dumpAsXml(message, true);

    MessageDump dump = (MessageDump) unmarshaller.unmarshal(new StringReader(out));
    assertNotNull(dump);

    assertEquals("java.lang.String", dump.getBody().getType());
    assertEquals("Hello World", dump.getBody().getValue());

    assertEquals(1, dump.getHeaders().size());
    assertEquals("foo", dump.getHeaders().get(0).getKey());
    assertEquals("java.lang.Integer", dump.getHeaders().get(0).getType());
    assertEquals("123", dump.getHeaders().get(0).getValue());
  }
예제 #5
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    public void process(Exchange exchange) throws Exception {
      exchange.getIn().getBody(String.class);

      Message output = exchange.getOut();
      output.setHeader("sample.name", "myValue");
      output.setBody(expectedBody);
    }
예제 #6
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  public void process(Exchange exchange) throws Exception {
    if (executor == null) {
      executor =
          exchange
              .getContext()
              .getExecutorServiceManager()
              .newFixedThreadPool(this, "CLAIM-CHECK", 4);
    }

    String id = tag.evaluate(exchange, String.class);
    exchange.setProperty(ClaimCheck.CLAIMCHECK_TAG_HEADER, id);

    final Producer conveyor = findDestination(exchange).createProducer();
    final Exchange baggage = ExchangeHelper.createCorrelatedCopy(exchange, false);

    LOG.info("Checking in 'baggage'");
    executor.submit(
        new Callable<Exchange>() {
          public Exchange call() throws Exception {
            try {
              LOG.debug("[claimcheck] {} {}", conveyor, baggage);
              conveyor.process(baggage);
            } catch (Throwable e) {
              LOG.warn(
                  "Error occurred during processing " + baggage + " checked in at " + conveyor, e);
            }
            return baggage;
          };
        });

    LOG.info("Continue normal flow without 'baggage'");
    Message out = exchange.getOut();
    out.setBody(value.evaluate(exchange, Object.class));
  }
예제 #7
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  public void testGetMessageId() {
    context.setUuidGenerator(new SimpleUuidGenerator());
    Exchange exchange = new DefaultExchange(context);
    Message in = exchange.getIn();

    assertEquals("1", in.getMessageId());
  }
예제 #8
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    @Override
    public Source respond(SoapOperation invokedOperation, SoapMessage message) {
      Exchange exchange = new DefaultExchange(getCamelContext(), ExchangePattern.InOut);

      Document messageDocument = message.getDocument();
      String requestBody = envelopeWrapper.unwrap(messageDocument, getCamelContext());

      exchange.getIn().setBody(requestBody);
      exchange.getIn().setHeader(OPERATION, invokedOperation.getOperationName());

      try {
        getProcessor().process(exchange);
        if (exchange.getException() != null) {
          throw exchange.getException();
        }
        Message responseMessage = exchange.getOut(Message.class);
        if (responseMessage != null) {
          String responseBody = responseMessage.getBody(String.class);
          return envelopeWrapper.wrapToSource(responseBody, getCamelContext());
        } else {
          throw new IllegalArgumentException(
              "Could not find output message, exchange: " + exchange);
        }
      } catch (Exception ex) {
        throw new SoapServerException(ex);
      }
    }
  /**
   * Generate a "help" message.
   *
   * @param exchange the incoming message
   */
  public void process(final Exchange exchange) throws IOException {

    final Message in = exchange.getIn();
    final CamelContext context = exchange.getContext();

    final String fedora;
    final String endpoint;

    try {
      fedora = context.resolvePropertyPlaceholders("{{fcrepo.baseUrl}}");
      endpoint =
          InetAddress.getLocalHost().getHostName()
              + ":"
              + context.resolvePropertyPlaceholders("{{rest.port}}")
              + context.resolvePropertyPlaceholders("{{rest.prefix}}");
    } catch (final Exception ex) {
      throw new RuntimeCamelException("Could not resolve property placeholders", ex);
    }

    final StringBuilder sb = new StringBuilder();
    sb.append("Geneva Synchronization Service\n\n");
    sb.append("\tConfigured Fedora Location: " + fedora + "\n");
    sb.append("\tConfigured REST Endpoint: " + endpoint + "\n\n");
    sb.append("You can POST to defined endpoint, and it will begin\n");
    sb.append("a re-synchronization task with the configured datastore.\n\n");
    sb.append("For example:\n\n");
    sb.append("\tcurl -XPOST " + endpoint + "\n\n");

    in.setBody(sb.toString());
  }
  @Test
  public void testCreateNotificationEmail() throws Exception {

    String expectedEmailBody =
        "Booking Name: Simpson, Homer<br/>Name in Parole case information: offenderName<br/>\n"
            + "SID: A9999999<br/>\n"
            + "DATE/TIME OF BOOKING: 2013-09-06<br/>\n"
            + "ARRESTING AGENCY: Honolulu PD<br/>ATTORNEY GENERAL CASE: false<br/>\n"
            + "ARREST CHARGES:<br/>\n"
            + "Description: Assault Severity: very severe, ARN: I-04679<br/>\n"
            + "<br/><br/>Positively identified by fingerprint.";

    EmailNotification email = new EmailNotification();
    email.addToAddressee("po1@localhost");
    email.setSubjectName("offenderName");
    email.setSubscribingSystemIdentifier("{http://demostate.gov/SystemNames/1.0}SystemA");
    email.setSubscriptionCategoryCode("default");
    email.setNotificationRequest(new ArrestNotificationRequest(getNotificationMessage()));

    Exchange e = new DefaultExchange((CamelContext) null);
    Message inMessage = e.getIn();
    inMessage.setHeader("notificationTopic", "arrest");
    inMessage.setBody(email);

    arrestNotificationProcessor.createNotificationEmail(e);

    Object receivedEmailBody = e.getOut().getBody();
    assertEquals(expectedEmailBody, receivedEmailBody);
    assertEquals("po1@localhost", e.getOut().getHeader(NotificationConstants.HEADER_TO));
  }
예제 #11
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  public void process(Exchange exchange) throws Exception {
    Jaxp11XMLReaderCreator xmlCreator = new Jaxp11XMLReaderCreator();
    DefaultValidationErrorHandler errorHandler = new DefaultValidationErrorHandler();

    PropertyMapBuilder mapBuilder = new PropertyMapBuilder();
    mapBuilder.put(ValidateProperty.XML_READER_CREATOR, xmlCreator);
    mapBuilder.put(ValidateProperty.ERROR_HANDLER, errorHandler);
    PropertyMap propertyMap = mapBuilder.toPropertyMap();

    Validator validator = getSchema().createValidator(propertyMap);

    Message in = exchange.getIn();
    SAXSource saxSource = in.getBody(SAXSource.class);
    if (saxSource == null) {
      Source source = exchange.getIn().getMandatoryBody(Source.class);
      saxSource = ExchangeHelper.convertToMandatoryType(exchange, SAXSource.class, source);
    }
    InputSource bodyInput = saxSource.getInputSource();

    // now lets parse the body using the validator
    XMLReader reader = xmlCreator.createXMLReader();
    reader.setContentHandler(validator.getContentHandler());
    reader.setDTDHandler(validator.getDTDHandler());
    reader.setErrorHandler(errorHandler);
    reader.parse(bodyInput);

    errorHandler.handleErrors(exchange, schema);
  }
예제 #12
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    @Override
    public void onAfterRoute(Route route, Exchange exchange) {
      // add the CORS headers after routing, but before the consumer writes the response
      Message msg = exchange.hasOut() ? exchange.getOut() : exchange.getIn();

      // use default value if none has been configured
      String allowOrigin =
          corsHeaders != null ? corsHeaders.get("Access-Control-Allow-Origin") : null;
      if (allowOrigin == null) {
        allowOrigin = RestConfiguration.CORS_ACCESS_CONTROL_ALLOW_ORIGIN;
      }
      String allowMethods =
          corsHeaders != null ? corsHeaders.get("Access-Control-Allow-Methods") : null;
      if (allowMethods == null) {
        allowMethods = RestConfiguration.CORS_ACCESS_CONTROL_ALLOW_METHODS;
      }
      String allowHeaders =
          corsHeaders != null ? corsHeaders.get("Access-Control-Allow-Headers") : null;
      if (allowHeaders == null) {
        allowHeaders = RestConfiguration.CORS_ACCESS_CONTROL_ALLOW_HEADERS;
      }
      String maxAge = corsHeaders != null ? corsHeaders.get("Access-Control-Max-Age") : null;
      if (maxAge == null) {
        maxAge = RestConfiguration.CORS_ACCESS_CONTROL_MAX_AGE;
      }

      msg.setHeader("Access-Control-Allow-Origin", allowOrigin);
      msg.setHeader("Access-Control-Allow-Methods", allowMethods);
      msg.setHeader("Access-Control-Allow-Headers", allowHeaders);
      msg.setHeader("Access-Control-Max-Age", maxAge);
    }
 private void populateRoutingInfoHeaders(final Message message, final Envelope envelope) {
   if (envelope != null) {
     message.setHeader(RabbitMQConstants.ROUTING_KEY, envelope.getRoutingKey());
     message.setHeader(RabbitMQConstants.EXCHANGE_NAME, envelope.getExchange());
     message.setHeader(RabbitMQConstants.DELIVERY_TAG, envelope.getDeliveryTag());
   }
 }
예제 #14
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  /**
   * All headers except collection and database are non available for this operation.
   *
   * @param exchange
   * @throws Exception
   */
  protected void doAggregate(Exchange exchange) throws Exception {
    DBCollection dbCol = calculateCollection(exchange);
    DBObject query = exchange.getIn().getMandatoryBody(DBObject.class);

    // Impossible with java driver to get the batch size and number to skip
    Iterable<DBObject> dbIterator = null;
    AggregationOutput aggregationResult = null;

    // Allow body to be a pipeline
    // @see http://docs.mongodb.org/manual/core/aggregation/
    if (query instanceof BasicDBList) {
      BasicDBList queryList = (BasicDBList) query;
      aggregationResult =
          dbCol.aggregate(
              (DBObject) queryList.get(0),
              queryList
                  .subList(1, queryList.size())
                  .toArray(new BasicDBObject[queryList.size() - 1]));
    } else {
      aggregationResult = dbCol.aggregate(query);
    }

    dbIterator = aggregationResult.results();
    Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.aggregate);
    resultMessage.setBody(dbIterator);
  }
예제 #15
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  public void testSetBodyType() throws Exception {
    Exchange exchange = new DefaultExchange(context);
    Message in = exchange.getIn();
    in.setBody("123", Integer.class);

    assertIsInstanceOf(Integer.class, in.getBody());
  }
예제 #16
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  protected void populateResponse(
      Exchange exchange,
      HttpMethod method,
      Message in,
      HeaderFilterStrategy strategy,
      int responseCode)
      throws IOException, ClassNotFoundException {
    // We just make the out message is not create when extractResponseBody throws exception,
    Object response = extractResponseBody(method, exchange);
    Message answer = exchange.getOut();

    answer.setHeader(Exchange.HTTP_RESPONSE_CODE, responseCode);
    answer.setBody(response);

    // propagate HTTP response headers
    Header[] headers = method.getResponseHeaders();
    for (Header header : headers) {
      String name = header.getName();
      String value = header.getValue();
      if (name.toLowerCase().equals("content-type")) {
        name = Exchange.CONTENT_TYPE;
        exchange.setProperty(Exchange.CHARSET_NAME, IOHelper.getCharsetNameFromContentType(value));
      }

      // use http helper to extract parameter value as it may contain multiple values
      Object extracted = HttpHelper.extractHttpParameterValue(value);
      if (strategy != null && !strategy.applyFilterToExternalHeaders(name, extracted, exchange)) {
        HttpHelper.appendHeader(answer.getHeaders(), name, extracted);
      }
    }

    // preserve headers from in by copying any non existing headers
    // to avoid overriding existing headers with old values
    MessageHelper.copyHeaders(exchange.getIn(), answer, false);
  }
예제 #17
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  /** {@inheritDoc} */
  @Override
  public void mapTo(Context context, CamelBindingData target) throws Exception {
    Message message = target.getMessage();
    Exchange exchange = message.getExchange();

    for (Property property : context.getProperties(Scope.MESSAGE)) {
      String name = property.getName();
      if (matches(name) && !name.startsWith("org.switchyard.bus.camel")) {
        Object value = property.getValue();
        if (value != null) {
          message.setHeader(name, value);
        }
      }
    }
    if (exchange != null) {
      for (Property property : context.getProperties(Scope.EXCHANGE)) {
        String name = property.getName();
        if (matches(name) && !name.startsWith("org.switchyard.bus.camel")) {
          Object value = property.getValue();
          if (value != null) {
            exchange.setProperty(name, value);
          }
        }
      }
    }
  }
예제 #18
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  /** {@inheritDoc} */
  @Override
  public void mapFrom(CamelBindingData source, Context context) throws Exception {
    Message message = source.getMessage();
    Exchange exchange = message.getExchange();

    for (Map.Entry<String, Object> header : message.getHeaders().entrySet()) {
      String name = header.getKey();
      if (matches(name) && !name.startsWith("org.switchyard.bus.camel")) {
        Object value = header.getValue();
        if (value != null) {
          context.setProperty(name, value, Scope.MESSAGE).addLabels(getCamelLabels());
        }
      }
    }
    if (exchange != null) {
      for (Map.Entry<String, Object> property : exchange.getProperties().entrySet()) {
        String name = property.getKey();
        if (matches(name) && !name.startsWith("org.switchyard.bus.camel")) {
          Object value = property.getValue();
          if (value != null) {
            context.setProperty(name, value, Scope.EXCHANGE).addLabels(getCamelLabels());
          }
        }
      }
    }
  }
예제 #19
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 private Message prepareResponseMessage(Exchange exchange, MongoDbOperation operation) {
   Message answer = exchange.getOut();
   MessageHelper.copyHeaders(exchange.getIn(), answer, false);
   if (isWriteOperation(operation) && endpoint.isWriteResultAsHeader()) {
     answer.setBody(exchange.getIn().getBody());
   }
   return answer;
 }
예제 #20
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 public void processDataSet(Exchange originalExchange, DataSet dataSet, int counter)
     throws Exception {
   Exchange exchange = originalExchange.copy();
   Message in = exchange.getIn();
   in.setBody(dataSet);
   in.setHeader("CamelFlatpackCounter", counter);
   loadBalancer.process(exchange);
 }
 @Override
 protected void setUp() throws Exception {
   super.setUp();
   Message in = exchange.getIn();
   in.setBody("Hello there!");
   in.setHeader("name", "James");
   in.setHeader("location", "Islington,London,UK");
 }
예제 #22
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파일: JmsBinding.java 프로젝트: mnki/camel
  /**
   * Creates a JMS message from the Camel exchange and message
   *
   * @param exchange the current exchange
   * @param camelMessage the body to make a javax.jms.Message as
   * @param session the JMS session used to create the message
   * @param cause optional exception occurred that should be sent as reply instead of a regular body
   * @return a newly created JMS Message instance containing the
   * @throws JMSException if the message could not be created
   */
  public Message makeJmsMessage(
      Exchange exchange, org.apache.camel.Message camelMessage, Session session, Exception cause)
      throws JMSException {
    Message answer = null;

    boolean alwaysCopy = endpoint != null && endpoint.getConfiguration().isAlwaysCopyMessage();
    boolean force = endpoint != null && endpoint.getConfiguration().isForceSendOriginalMessage();
    if (!alwaysCopy && camelMessage instanceof JmsMessage) {
      JmsMessage jmsMessage = (JmsMessage) camelMessage;
      if (!jmsMessage.shouldCreateNewMessage() || force) {
        answer = jmsMessage.getJmsMessage();

        if (!force) {
          // answer must match endpoint type
          JmsMessageType type =
              endpoint != null ? endpoint.getConfiguration().getJmsMessageType() : null;
          if (type != null && answer != null) {
            if (type == JmsMessageType.Text) {
              answer = answer instanceof TextMessage ? answer : null;
            } else if (type == JmsMessageType.Bytes) {
              answer = answer instanceof BytesMessage ? answer : null;
            } else if (type == JmsMessageType.Map) {
              answer = answer instanceof MapMessage ? answer : null;
            } else if (type == JmsMessageType.Object) {
              answer = answer instanceof ObjectMessage ? answer : null;
            } else if (type == JmsMessageType.Stream) {
              answer = answer instanceof StreamMessage ? answer : null;
            }
          }
        }
      }
    }

    if (answer == null) {
      if (cause != null) {
        // an exception occurred so send it as response
        LOG.debug("Will create JmsMessage with caused exception: {}", cause);
        // create jms message containing the caused exception
        answer = createJmsMessage(cause, session);
      } else {
        ObjectHelper.notNull(camelMessage, "message");
        // create regular jms message using the camel message body
        answer =
            createJmsMessage(
                exchange,
                camelMessage.getBody(),
                camelMessage.getHeaders(),
                session,
                exchange.getContext());
        appendJmsProperties(answer, exchange, camelMessage);
      }
    }

    if (answer != null && messageCreatedStrategy != null) {
      messageCreatedStrategy.onMessageCreated(answer, session, exchange, null);
    }
    return answer;
  }
예제 #23
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  @SuppressWarnings("unchecked")
  protected void doUpdate(Exchange exchange) throws Exception {
    DBCollection dbCol = calculateCollection(exchange);
    List<DBObject> saveObj =
        exchange.getIn().getMandatoryBody((Class<List<DBObject>>) (Class<?>) List.class);
    if (saveObj.size() != 2) {
      throw new CamelMongoDbException(
          "MongoDB operation = insert, failed because body is not a List of DBObject objects with size = 2");
    }

    DBObject updateCriteria = saveObj.get(0);
    DBObject objNew = saveObj.get(1);

    Boolean multi = exchange.getIn().getHeader(MongoDbConstants.MULTIUPDATE, Boolean.class);
    Boolean upsert = exchange.getIn().getHeader(MongoDbConstants.UPSERT, Boolean.class);

    WriteResult result;
    WriteConcern wc = extractWriteConcern(exchange);
    // In API 2.7, the default upsert and multi values of update(DBObject, DBObject) are false,
    // false, so we unconditionally invoke the
    // full-signature method update(DBObject, DBObject, boolean, boolean). However, the default
    // behaviour may change in the future,
    // so it's safer to be explicit at this level for full determinism
    if (multi == null && upsert == null) {
      // for update with no multi nor upsert but with specific WriteConcern there is no update
      // signature without multi and upsert args,
      // so assume defaults
      result =
          wc == null
              ? dbCol.update(updateCriteria, objNew)
              : dbCol.update(updateCriteria, objNew, false, false, wc);
    } else {
      // we calculate the final boolean values so that if any of these
      // parameters is null, it is resolved to false
      result =
          wc == null
              ? dbCol.update(
                  updateCriteria,
                  objNew,
                  calculateBooleanValue(upsert),
                  calculateBooleanValue(multi))
              : dbCol.update(
                  updateCriteria,
                  objNew,
                  calculateBooleanValue(upsert),
                  calculateBooleanValue(multi),
                  wc);
    }

    Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.update);
    // we always return the WriteResult, because whether the getLastError was called or not, the
    // user will have the means to call it or
    // obtain the cached CommandResult
    processAndTransferWriteResult(result, exchange);
    resultMessage.setHeader(MongoDbConstants.RECORDS_AFFECTED, result.getN());
  }
 @Test
 public void testDefault() throws Exception {
   mock.expectedBodiesReceived("test1");
   mock.expectedHeaderReceived("test", "test2");
   producerTemplate.sendBodyAndHeader("direct:input", "test1", "test", "test2");
   mock.assertIsSatisfied();
   Message received = mock.getExchanges().get(0).getIn();
   assertEquals("default", received.getHeader(GTaskBinding.GTASK_QUEUE_NAME));
   assertEquals(0, received.getHeader(GTaskBinding.GTASK_RETRY_COUNT));
 }
예제 #25
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  public NCSServicePath createPath(
      @JuniperXPath("//juniper:ServicePath") NodeList pathList, Exchange exchange) {
    Message in = exchange.getIn();
    String nodeForeignSource = (String) in.getHeader("nodeForeignSource");
    String serviceForeignSource = (String) in.getHeader("foreignSource");
    Node servicePath = pathList.item(0);

    return new NCSServicePath(
        servicePath, m_dao, m_nodeDao, nodeForeignSource, serviceForeignSource);
  }
 @Override
 public void process(Exchange exchange) {
   final Message in = exchange.getIn();
   final Collection<?> list = in.getBody(AbstractCollection.class);
   BigDecimal total = BigDecimal.ZERO;
   for (Object value : list) {
     total = total.add(BigDecimal.valueOf((Integer) value));
   }
   in.setBody(total.divide(new BigDecimal(list.size()), RoundingMode.HALF_UP));
 }
예제 #27
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  public Exchange createMongoDbExchange(DBObject dbObj) {
    Exchange exchange = new DefaultExchange(this.getCamelContext(), getExchangePattern());
    Message message = new DefaultMessage();
    message.setHeader(MongoDbConstants.DATABASE, database);
    message.setHeader(MongoDbConstants.COLLECTION, collection);
    message.setHeader(MongoDbConstants.FROM_TAILABLE, true);

    message.setBody(dbObj);
    exchange.setIn(message);
    return exchange;
  }
  @Test
  public void testNoFeedInHeader() throws Exception {
    MockEndpoint mock = getMockEndpoint("mock:result");
    mock.expectedMessageCount(1);
    mock.assertIsSatisfied();

    Exchange exchange = mock.getExchanges().get(0);
    Message in = exchange.getIn();
    assertNotNull(in);
    assertNull(in.getHeader(RssConstants.RSS_FEED));
  }
예제 #29
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  // START SNIPPET: e1
  private Exchange createLetter() {
    Exchange exchange = context.getEndpoint("direct:a").createExchange();

    Message msg = exchange.getIn();
    msg.setHeader("firstName", "Claus");
    msg.setHeader("lastName", "Ibsen");
    msg.setHeader("item", "Camel in Action");
    msg.setBody("PS: Next beer is on me, James");

    return exchange;
  }
예제 #30
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  protected void doFindAll(Exchange exchange) throws Exception {
    DBCollection dbCol = calculateCollection(exchange);
    // do not use getMandatoryBody, because if the body is empty we want to retrieve all objects in
    // the collection
    DBObject query = null;
    // do not run around looking for a type converter unless there is a need for it
    if (exchange.getIn().getBody() != null) {
      query = exchange.getIn().getBody(DBObject.class);
    }
    DBObject fieldFilter =
        exchange.getIn().getHeader(MongoDbConstants.FIELDS_FILTER, DBObject.class);

    // get the batch size and number to skip
    Integer batchSize = exchange.getIn().getHeader(MongoDbConstants.BATCH_SIZE, Integer.class);
    Integer numToSkip = exchange.getIn().getHeader(MongoDbConstants.NUM_TO_SKIP, Integer.class);
    Integer limit = exchange.getIn().getHeader(MongoDbConstants.LIMIT, Integer.class);
    DBObject sortBy = exchange.getIn().getHeader(MongoDbConstants.SORT_BY, DBObject.class);
    DBCursor ret = null;
    try {
      if (query == null && fieldFilter == null) {
        ret = dbCol.find(new BasicDBObject());
      } else if (fieldFilter == null) {
        ret = dbCol.find(query);
      } else {
        ret = dbCol.find(query, fieldFilter);
      }

      if (sortBy != null) {
        ret.sort(sortBy);
      }

      if (batchSize != null) {
        ret.batchSize(batchSize.intValue());
      }

      if (numToSkip != null) {
        ret.skip(numToSkip.intValue());
      }

      if (limit != null) {
        ret.limit(limit.intValue());
      }

      Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.findAll);
      resultMessage.setBody(ret.toArray());
      resultMessage.setHeader(MongoDbConstants.RESULT_TOTAL_SIZE, ret.count());
      resultMessage.setHeader(MongoDbConstants.RESULT_PAGE_SIZE, ret.size());
    } finally {
      // make sure the cursor is closed
      if (ret != null) {
        ret.close();
      }
    }
  }