Package org.springframework.cloud.stream.binder.rabbit

Class RabbitExpressionEvaluatingInterceptor

java.lang.Object

org.springframework.cloud.stream.binder.rabbit.RabbitExpressionEvaluatingInterceptor

All Implemented Interfaces:

org.springframework.messaging.support.ChannelInterceptor

public class RabbitExpressionEvaluatingInterceptor
extends Object
implements org.springframework.messaging.support.ChannelInterceptor

Interceptor to evaluate expressions for outbound messages before serialization.

Since:

2.0

Author:

Gary Russell, Oleg Zhurakousky

Field Summary

Fields

Modifier and Type	Field	Description
static String	DELAY_HEADER	Default name for delay header.
static org.springframework.expression.ExpressionParser	PARSER	Instance of ExpressionParser.
static String	ROUTING_KEY_HEADER	Default name for routing key header.

Constructor Summary

Constructors

Constructor	Description
RabbitExpressionEvaluatingInterceptor(org.springframework.expression.Expression routingKeyExpression, org.springframework.expression.Expression delayExpression, org.springframework.expression.EvaluationContext evaluationContext)	Construct an instance with the provided expressions and evaluation context.

Method Summary

Modifier and Type	Method	Description
org.springframework.messaging.Message<?>	preSend(org.springframework.messaging.Message<?> message, org.springframework.messaging.MessageChannel channel)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.messaging.support.ChannelInterceptor

afterReceiveCompletion, afterSendCompletion, postReceive, postSend, preReceive

Field Detail

PARSER

public static final org.springframework.expression.ExpressionParser PARSER

Instance of ExpressionParser.

ROUTING_KEY_HEADER

public static final String ROUTING_KEY_HEADER

Default name for routing key header.

See Also:

Constant Field Values

DELAY_HEADER

public static final String DELAY_HEADER

Default name for delay header.

See Also:

Constant Field Values

Constructor Detail

RabbitExpressionEvaluatingInterceptor

public RabbitExpressionEvaluatingInterceptor(org.springframework.expression.Expression routingKeyExpression,
                                             org.springframework.expression.Expression delayExpression,
                                             org.springframework.expression.EvaluationContext evaluationContext)

Construct an instance with the provided expressions and evaluation context. At least one expression muse be non-null.

Parameters:

routingKeyExpression - the routing key expresssion.

delayExpression - the delay expression.

evaluationContext - the evaluation context.

Method Detail

preSend

public org.springframework.messaging.Message<?> preSend(org.springframework.messaging.Message<?> message,
                                                        org.springframework.messaging.MessageChannel channel)

Specified by:

preSend in interface org.springframework.messaging.support.ChannelInterceptor