org.springframework.messaging.support

Class NativeMessageHeaderAccessor

java.lang.Object

org.springframework.messaging.support.MessageHeaderAccessor

org.springframework.messaging.support.NativeMessageHeaderAccessor

Direct Known Subclasses:

SimpMessageHeaderAccessor

public class NativeMessageHeaderAccessor
extends MessageHeaderAccessor

An extension of MessageHeaderAccessor that also stores and provides read/write access to message headers from an external source -- e.g. a Spring Message created to represent a STOMP message received from a STOMP client or message broker. Native message headers are kept in a Map<String, List<String>> under the key NATIVE_HEADERS.

This class is not intended for direct use but is rather expected to be used indirectly through protocol-specific sub-classes such as StompHeaderAccessor. Such sub-classes may provide factory methods to translate message headers from an external messaging source (e.g. STOMP) to Spring Message headers and reversely to translate Spring Message headers to a message to send to an external source.

Since:

4.0

Author:

Rossen Stoyanchev

Field Summary

Fields

Modifier and Type	Field and Description
static String	NATIVE_HEADERS

Fields inherited from class org.springframework.messaging.support.MessageHeaderAccessor

DEFAULT_CHARSET, logger

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NativeMessageHeaderAccessor() A protected constructor to create new headers.
protected	NativeMessageHeaderAccessor(Map<String,List<String>> nativeHeaders) A protected constructor to create new headers.
protected	NativeMessageHeaderAccessor(Message<?> message) A protected constructor accepting the headers of an existing message to copy.

Method Summary

Modifier and Type	Method and Description
void	addNativeHeader(String name, String value) Add the specified native header value to existing values.
void	addNativeHeaders(org.springframework.util.MultiValueMap<String,String> headers)
boolean	containsNativeHeader(String headerName) Whether the native header map contains the give header name.
String	getFirstNativeHeader(String headerName)
static String	getFirstNativeHeader(String headerName, Map<String,Object> headers)
List<String>	getNativeHeader(String headerName)
List<String>	removeNativeHeader(String name)
void	setImmutable() By default when MessageHeaderAccessor.getMessageHeaders() is called, "this" MessageHeaderAccessor instance can no longer be used to modify the underlying message headers.
void	setNativeHeader(String name, String value) Set the specified native header value replacing existing values.
Map<String,List<String>>	toNativeHeaderMap() Return a copy of the native header values or an empty map.

Methods inherited from class org.springframework.messaging.support.MessageHeaderAccessor

copyHeaders, copyHeadersIfAbsent, createAccessor, getAccessor, getAccessor, getContentType, getDetailedLogMessage, getDetailedPayloadLogMessage, getErrorChannel, getHeader, getId, getMessageHeaders, getMutableAccessor, getReplyChannel, getShortLogMessage, getShortPayloadLogMessage, getTimestamp, isModified, isMutable, isReadableContentType, isReadOnly, removeHeader, removeHeaders, setContentType, setErrorChannel, setErrorChannelName, setHeader, setHeaderIfAbsent, setLeaveMutable, setModified, setReplyChannel, setReplyChannelName, toMap, toMessageHeaders, toString, verifyType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

NATIVE_HEADERS

public static final String NATIVE_HEADERS

See Also:

Constant Field Values

Constructor Detail

NativeMessageHeaderAccessor

protected NativeMessageHeaderAccessor()

A protected constructor to create new headers.

NativeMessageHeaderAccessor

protected NativeMessageHeaderAccessor(Map<String,List<String>> nativeHeaders)

A protected constructor to create new headers.

Parameters:

nativeHeaders - native headers to create the message with (may be null)

NativeMessageHeaderAccessor

protected NativeMessageHeaderAccessor(Message<?> message)

A protected constructor accepting the headers of an existing message to copy.

Method Detail

toNativeHeaderMap

public Map<String,List<String>> toNativeHeaderMap()

Return a copy of the native header values or an empty map.

setImmutable

public void setImmutable()

Description copied from class: MessageHeaderAccessor

By default when MessageHeaderAccessor.getMessageHeaders() is called, "this" MessageHeaderAccessor instance can no longer be used to modify the underlying message headers. However if MessageHeaderAccessor.setLeaveMutable(boolean) is used, this method is necessary to indicate explicitly when the MessageHeaders instance should no longer be modified.

Overrides:

setImmutable in class MessageHeaderAccessor

containsNativeHeader

public boolean containsNativeHeader(String headerName)

Whether the native header map contains the give header name.

getNativeHeader

public List<String> getNativeHeader(String headerName)

Returns:

all values for the specified native header or null.

getFirstNativeHeader

public String getFirstNativeHeader(String headerName)

Returns:

the first value for the specified native header of null.

setNativeHeader

public void setNativeHeader(String name,
                            String value)

Set the specified native header value replacing existing values.

addNativeHeader

public void addNativeHeader(String name,
                            String value)

Add the specified native header value to existing values.

addNativeHeaders

public void addNativeHeaders(org.springframework.util.MultiValueMap<String,String> headers)

removeNativeHeader

public List<String> removeNativeHeader(String name)

getFirstNativeHeader

public static String getFirstNativeHeader(String headerName,
                                          Map<String,Object> headers)