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,
                                     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​(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​(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.

  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​(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