org.springframework.cloud.function.context.message

Class MessageUtils

java.lang.Object

org.springframework.cloud.function.context.message.MessageUtils

public abstract class MessageUtils
extends Object

Author:

Dave Syer, Oleg Zhurakousky

Field Summary

Fields

Modifier and Type	Field and Description
static String	MESSAGE_TYPE Value for 'message-type' typically use as header key.
static String	SOURCE_TYPE Value for 'target-protocol' typically use as header key.
static String	TARGET_PROTOCOL Value for 'target-protocol' typically use as header key.

Constructor Summary

Constructors

Constructor and Description
MessageUtils()

Method Summary

Modifier and Type	Method and Description
static Object	create(Object handler, Object payload, Map<String,Object> headers) Create a message for the handler.
static org.springframework.messaging.Message<?>	unpack(Object handler, Object message) Convert a message from the handler into one that is safe to consume in the caller's class loader.

Methods inherited from class java.lang.Object

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

Field Detail

MESSAGE_TYPE

public static String MESSAGE_TYPE

Value for 'message-type' typically use as header key.

TARGET_PROTOCOL

public static String TARGET_PROTOCOL

Value for 'target-protocol' typically use as header key.

SOURCE_TYPE

public static String SOURCE_TYPE

Value for 'target-protocol' typically use as header key.

Constructor Detail

MessageUtils

public MessageUtils()

Method Detail

create

public static Object create(Object handler,
                            Object payload,
                            Map<String,Object> headers)

Create a message for the handler. If the handler is a wrapper for a function in an isolated class loader, then the message will be created with the target class loader (therefore the Message class must be on the classpath of the target class loader).

Parameters:

handler - the function that will be applied to the message

payload - the payload of the message

headers - the headers for the message

Returns:

a message with the correct class loader

unpack

public static org.springframework.messaging.Message<?> unpack(Object handler,
                                                              Object message)

Convert a message from the handler into one that is safe to consume in the caller's class loader. If the handler is a wrapper for a function in an isolated class loader, then the message will be created with the target class loader (therefore the Message class must be on the classpath of the target class loader).

Parameters:

handler - the function that generated the message

message - the message to convert

Returns:

a message with the correct class loader