Package org.springframework.messaging.simp

Class SimpMessageHeaderAccessor

java.lang.Object

org.springframework.messaging.support.MessageHeaderAccessor

org.springframework.messaging.support.NativeMessageHeaderAccessor

org.springframework.messaging.simp.SimpMessageHeaderAccessor

Direct Known Subclasses:

StompHeaderAccessor

public class SimpMessageHeaderAccessor
extends NativeMessageHeaderAccessor

A base class for working with message headers in simple messaging protocols that support basic messaging patterns. Provides uniform access to specific values common across protocols such as a destination, message type (for example, publish, subscribe, etc), session ID, and others.

Use one of the static factory methods in this class, then call getters and setters, and at the end if necessary call MessageHeaderAccessor.toMap() to obtain the updated headers.

Since:

4.0

Author:

Rossen Stoyanchev

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CONNECT_MESSAGE_HEADER
static final String	DESTINATION_HEADER
static final String	DISCONNECT_MESSAGE_HEADER
static final String	HEART_BEAT_HEADER
static final String	IGNORE_ERROR	A header that indicates to the broker that the sender will ignore errors.
static final String	MESSAGE_TYPE_HEADER
static final String	ORIGINAL_DESTINATION	A header for internal use with "user" destinations where we need to restore the destination prior to sending messages to clients.
static final String	SESSION_ATTRIBUTES
static final String	SESSION_ID_HEADER
static final String	SUBSCRIPTION_ID_HEADER
static final String	USER_HEADER

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

NATIVE_HEADERS

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

DEFAULT_CHARSET

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SimpMessageHeaderAccessor(Message<?> message)	A constructor for accessing and modifying existing message headers.
protected	SimpMessageHeaderAccessor(SimpMessageType messageType, Map<String,List<String>> externalSourceHeaders)	A constructor for creating new message headers.

Method Summary

Modifier and Type	Method	Description
static SimpMessageHeaderAccessor	create()	Create an instance with SimpMessageType MESSAGE.
static SimpMessageHeaderAccessor	create(SimpMessageType messageType)	Create an instance with the given SimpMessageType.
protected MessageHeaderAccessor	createAccessor(Message<?> message)	Build a 'nested' accessor for the given message.
String	getDestination()
static String	getDestination(Map<String,Object> headers)
String	getDetailedLogMessage(Object payload)	Return a more detailed message for logging purposes.
static long[]	getHeartbeat(Map<String,Object> headers)
SimpMessageType	getMessageType()
static SimpMessageType	getMessageType(Map<String,Object> headers)
Map<String,Object>	getSessionAttributes()	Return the attributes associated with the current session.
static Map<String,Object>	getSessionAttributes(Map<String,Object> headers)
String	getSessionId()	Return the id of the current session.
static String	getSessionId(Map<String,Object> headers)
String	getShortLogMessage(Object payload)	Return a concise message for logging purposes.
String	getSubscriptionId()
static String	getSubscriptionId(Map<String,Object> headers)
Principal	getUser()	Return the user associated with the current session.
static Principal	getUser(Map<String,Object> headers)
void	setDestination(String destination)
void	setMessageTypeIfNotSet(SimpMessageType messageType)
void	setSessionAttributes(Map<String,Object> attributes)	A static alternative for access to the session attributes header.
void	setSessionId(String sessionId)
void	setSubscriptionId(String subscriptionId)
void	setUser(Principal principal)
void	setUserChangeCallback(Consumer<Principal> callback)	Provide a callback to be invoked if and when setUser(Principal) is called.
static SimpMessageHeaderAccessor	wrap(Message<?> message)	Create an instance by copying the headers of a Message.

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

addNativeHeader, addNativeHeaders, containsNativeHeader, copyHeaders, copyHeadersIfAbsent, getFirstNativeHeader, getFirstNativeHeader, getNativeHeader, getNativeHeaders, removeNativeHeader, setImmutable, setNativeHeader, setNativeHeaderValues, toNativeHeaderMap

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

fromMap, fromMessageHeaders, getAccessor, getAccessor, getAccessor, getContentType, getDetailedPayloadLogMessage, getErrorChannel, getHeader, getId, getMessageHeaders, getMutableAccessor, getReplyChannel, 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 Details

DESTINATION_HEADER

public static final String DESTINATION_HEADER

See Also:

• Constant Field Values

MESSAGE_TYPE_HEADER

public static final String MESSAGE_TYPE_HEADER

See Also:

• Constant Field Values

SESSION_ID_HEADER

public static final String SESSION_ID_HEADER

See Also:

• Constant Field Values

SESSION_ATTRIBUTES

public static final String SESSION_ATTRIBUTES

See Also:

• Constant Field Values

SUBSCRIPTION_ID_HEADER

public static final String SUBSCRIPTION_ID_HEADER

See Also:

• Constant Field Values

USER_HEADER

public static final String USER_HEADER

See Also:

• Constant Field Values

CONNECT_MESSAGE_HEADER

public static final String CONNECT_MESSAGE_HEADER

See Also:

• Constant Field Values

DISCONNECT_MESSAGE_HEADER

public static final String DISCONNECT_MESSAGE_HEADER

See Also:

• Constant Field Values

HEART_BEAT_HEADER

public static final String HEART_BEAT_HEADER

See Also:

• Constant Field Values

ORIGINAL_DESTINATION

public static final String ORIGINAL_DESTINATION

A header for internal use with "user" destinations where we need to restore the destination prior to sending messages to clients.

See Also:

• Constant Field Values

IGNORE_ERROR

public static final String IGNORE_ERROR

A header that indicates to the broker that the sender will ignore errors. The header is simply checked for presence or absence.

See Also:

• Constant Field Values

Constructor Details

SimpMessageHeaderAccessor

protected SimpMessageHeaderAccessor(SimpMessageType messageType,
 @Nullable
 Map<String,List<String>> externalSourceHeaders)

A constructor for creating new message headers.

This constructor is protected. See factory methods in this class and subclasses.

SimpMessageHeaderAccessor

protected SimpMessageHeaderAccessor(Message<?> message)

A constructor for accessing and modifying existing message headers.

This constructor is protected. See factory methods in this class and subclasses.

Method Details

createAccessor

protected MessageHeaderAccessor createAccessor(Message<?> message)

Description copied from class: MessageHeaderAccessor

Build a 'nested' accessor for the given message.

Overrides:

createAccessor in class MessageHeaderAccessor

Parameters:

message - the message to build a new accessor for

Returns:

the nested accessor (typically a specific subclass)

setMessageTypeIfNotSet

public void setMessageTypeIfNotSet(SimpMessageType messageType)

getMessageType

@Nullable
public SimpMessageType getMessageType()

setDestination

public void setDestination(@Nullable
 String destination)

getDestination

@Nullable
public String getDestination()

setSubscriptionId

public void setSubscriptionId(@Nullable
 String subscriptionId)

getSubscriptionId

@Nullable
public String getSubscriptionId()

setSessionId

public void setSessionId(@Nullable
 String sessionId)

getSessionId

@Nullable
public String getSessionId()

Return the id of the current session.

setSessionAttributes

public void setSessionAttributes(@Nullable
 Map<String,Object> attributes)

A static alternative for access to the session attributes header.

getSessionAttributes

@Nullable
public Map<String,Object> getSessionAttributes()

Return the attributes associated with the current session.

setUser

public void setUser(@Nullable
 Principal principal)

getUser

@Nullable
public Principal getUser()

Return the user associated with the current session.

setUserChangeCallback

public void setUserChangeCallback(Consumer<Principal> callback)

Provide a callback to be invoked if and when setUser(Principal) is called. This is used internally on the inbound channel to detect token-based authentications through an interceptor.

Parameters:

callback - the callback to invoke

Since:

5.1.9

getShortLogMessage

public String getShortLogMessage(Object payload)

Description copied from class: MessageHeaderAccessor

Return a concise message for logging purposes.

Overrides:

getShortLogMessage in class MessageHeaderAccessor

Parameters:

payload - the payload that corresponds to the headers.

Returns:

the message

getDetailedLogMessage

public String getDetailedLogMessage(@Nullable
 Object payload)

Description copied from class: MessageHeaderAccessor

Return a more detailed message for logging purposes.

Overrides:

getDetailedLogMessage in class MessageHeaderAccessor

Parameters:

payload - the payload that corresponds to the headers.

Returns:

the message

create

public static SimpMessageHeaderAccessor create()

Create an instance with SimpMessageType MESSAGE.

create

public static SimpMessageHeaderAccessor create(SimpMessageType messageType)

Create an instance with the given SimpMessageType.

wrap

public static SimpMessageHeaderAccessor wrap(Message<?> message)

Create an instance by copying the headers of a Message.

getMessageType

@Nullable
public static SimpMessageType getMessageType(Map<String,Object> headers)

getDestination

@Nullable
public static String getDestination(Map<String,Object> headers)

getSubscriptionId

@Nullable
public static String getSubscriptionId(Map<String,Object> headers)

getSessionId

@Nullable
public static String getSessionId(Map<String,Object> headers)

getSessionAttributes

@Nullable
public static Map<String,Object> getSessionAttributes(Map<String,Object> headers)

getUser

@Nullable
public static Principal getUser(Map<String,Object> headers)

getHeartbeat

@Nullable
public static long[] getHeartbeat(Map<String,Object> headers)