类 MessageBuilder<T>

方法详细资料

• setHeaders

  public MessageBuilder<T> setHeaders​(MessageHeaderAccessor accessor)

  Set the message headers to use by providing a MessageHeaderAccessor.

  参数:

  accessor - the headers to use

• setHeader

  public MessageBuilder<T> setHeader​(String headerName,
                                     @Nullable
                                     Object headerValue)

  Set the value for the given header name. If the provided value is null, the header will be removed.

• setHeaderIfAbsent

  public MessageBuilder<T> setHeaderIfAbsent​(String headerName,
                                             Object headerValue)

  Set the value for the given header name only if the header name is not already associated with a value.

• removeHeaders

  public MessageBuilder<T> removeHeaders​(String... headerPatterns)

  Removes all headers provided via array of 'headerPatterns'. As the name suggests the array may contain simple matching patterns for header names. Supported pattern styles are: "xxx*", "*xxx", "*xxx*" and "xxx*yyy".

• removeHeader

  public MessageBuilder<T> removeHeader​(String headerName)

  Remove the value for the given header name.

• copyHeaders

  public MessageBuilder<T> copyHeaders​(@Nullable
                                       Map<String,​?> headersToCopy)

  Copy the name-value pairs from the provided Map. This operation will overwrite any existing values. Use { copyHeadersIfAbsent(Map) to avoid overwriting values. Note that the 'id' and 'timestamp' header values will never be overwritten.

• copyHeadersIfAbsent

  public MessageBuilder<T> copyHeadersIfAbsent​(@Nullable
                                               Map<String,​?> headersToCopy)

  Copy the name-value pairs from the provided Map. This operation will not overwrite any existing values.

• setReplyChannel

  public MessageBuilder<T> setReplyChannel​(MessageChannel replyChannel)

• setReplyChannelName

  public MessageBuilder<T> setReplyChannelName​(String replyChannelName)

• setErrorChannel

  public MessageBuilder<T> setErrorChannel​(MessageChannel errorChannel)

• setErrorChannelName

  public MessageBuilder<T> setErrorChannelName​(String errorChannelName)

• build

  public Message<T> build()

• fromMessage

  public static <T> MessageBuilder<T> fromMessage​(Message<T> message)

  Create a builder for a new Message instance pre-populated with all of the headers copied from the provided message. The payload of the provided Message will also be used as the payload for the new message.

  If the provided message is an ErrorMessage, the originalMessage it contains, will be passed on to new instance.

  参数:

  message - the Message from which the payload and all headers will be copied

• withPayload

  public static <T> MessageBuilder<T> withPayload​(T payload)

  Create a new builder for a message with the given payload.

  参数:

  payload - the payload

• createMessage

  public static <T> Message<T> createMessage​(@Nullable
                                             T payload,
                                             MessageHeaders messageHeaders)

  A shortcut factory method for creating a message with the given payload and MessageHeaders.

  Note: the given MessageHeaders instance is used directly in the new message, i.e. it is not copied.

  参数:

  payload - the payload to use (never null)

  messageHeaders - the headers to use (never null)

  返回:

  the created message

  从以下版本开始:

  4.1