org.springframework.integration.handler.support

Class MessagingMethodInvokerHelper<T>

java.lang.Object

org.springframework.integration.util.AbstractExpressionEvaluator

org.springframework.integration.handler.support.MessagingMethodInvokerHelper<T>

All Implemented Interfaces:

org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanFactoryAware, org.springframework.beans.factory.InitializingBean, org.springframework.context.Lifecycle

public class MessagingMethodInvokerHelper<T>
extends AbstractExpressionEvaluator
implements org.springframework.context.Lifecycle

A helper class for processors that invoke a method on a target Object using a combination of message payload(s) and headers as arguments. The Method instance or method name may be provided as a constructor argument. If a method name is provided, and more than one declared method has that name, the method-selection will be dynamic, based on the underlying SpEL method resolution. Alternatively, an annotation type may be provided so that the candidates for SpEL's method resolution are determined by the presence of that annotation rather than the method name.

Since:

2.0

Author:

Mark Fisher, Oleg Zhurakousky, Dave Syer, Gunnar Hillert, Soby Chacko, Gary Russell, Artem Bilan

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MessagingMethodInvokerHelper.ParametersWrapper

Field Summary

Fields inherited from class org.springframework.integration.util.AbstractExpressionEvaluator

EXPRESSION_PARSER

Constructor Summary

Constructors

Constructor and Description
MessagingMethodInvokerHelper(java.lang.Object targetObject, java.lang.Class<? extends java.lang.annotation.Annotation> annotationType, boolean canProcessMessageList)
MessagingMethodInvokerHelper(java.lang.Object targetObject, java.lang.Class<? extends java.lang.annotation.Annotation> annotationType, java.lang.Class<?> expectedType, boolean canProcessMessageList)
MessagingMethodInvokerHelper(java.lang.Object targetObject, java.lang.reflect.Method method, boolean canProcessMessageList)
MessagingMethodInvokerHelper(java.lang.Object targetObject, java.lang.reflect.Method method, java.lang.Class<?> expectedType, boolean canProcessMessageList)
MessagingMethodInvokerHelper(java.lang.Object targetObject, java.lang.String methodName, boolean canProcessMessageList)
MessagingMethodInvokerHelper(java.lang.Object targetObject, java.lang.String methodName, java.lang.Class<?> expectedType, boolean canProcessMessageList)

Method Summary

Modifier and Type	Method and Description
boolean	isRunning()
T	process(java.util.Collection<org.springframework.messaging.Message<?>> messages, java.util.Map<java.lang.String,java.lang.Object> headers)
T	process(org.springframework.messaging.Message<?> message)
void	setBeanFactory(org.springframework.beans.factory.BeanFactory beanFactory) Specify a BeanFactory in order to enable resolution via @beanName in the expression.
void	setConversionService(org.springframework.core.convert.ConversionService conversionService)
void	setUseSpelInvoker(boolean useSpelInvoker) A boolean flag to use SpEL Expression evaluation or InvocableHandlerMethod for target method invocation.
void	start()
void	stop()
java.lang.String	toString()

Methods inherited from class org.springframework.integration.util.AbstractExpressionEvaluator

afterPropertiesSet, evaluateExpression, evaluateExpression, evaluateExpression, evaluateExpression, evaluateExpression, evaluateExpression, evaluateExpression, getBeanFactory, getEvaluationContext, getEvaluationContext, getMessageBuilderFactory, onInit

Methods inherited from class java.lang.Object

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

Constructor Detail

MessagingMethodInvokerHelper

public MessagingMethodInvokerHelper(java.lang.Object targetObject,
                                    java.lang.reflect.Method method,
                                    java.lang.Class<?> expectedType,
                                    boolean canProcessMessageList)

MessagingMethodInvokerHelper

public MessagingMethodInvokerHelper(java.lang.Object targetObject,
                                    java.lang.reflect.Method method,
                                    boolean canProcessMessageList)

MessagingMethodInvokerHelper

public MessagingMethodInvokerHelper(java.lang.Object targetObject,
                                    java.lang.String methodName,
                                    java.lang.Class<?> expectedType,
                                    boolean canProcessMessageList)

MessagingMethodInvokerHelper

public MessagingMethodInvokerHelper(java.lang.Object targetObject,
                                    java.lang.String methodName,
                                    boolean canProcessMessageList)

MessagingMethodInvokerHelper

public MessagingMethodInvokerHelper(java.lang.Object targetObject,
                                    java.lang.Class<? extends java.lang.annotation.Annotation> annotationType,
                                    boolean canProcessMessageList)

MessagingMethodInvokerHelper

public MessagingMethodInvokerHelper(java.lang.Object targetObject,
                                    java.lang.Class<? extends java.lang.annotation.Annotation> annotationType,
                                    java.lang.Class<?> expectedType,
                                    boolean canProcessMessageList)

Method Detail

setUseSpelInvoker

public void setUseSpelInvoker(boolean useSpelInvoker)

A boolean flag to use SpEL Expression evaluation or InvocableHandlerMethod for target method invocation.

Parameters:

useSpelInvoker - to use SpEL Expression evaluation or not.

Since:

5.0

setBeanFactory

public void setBeanFactory(@NonNull
                           org.springframework.beans.factory.BeanFactory beanFactory)

Description copied from class: AbstractExpressionEvaluator

Specify a BeanFactory in order to enable resolution via @beanName in the expression.

Specified by:

setBeanFactory in interface org.springframework.beans.factory.BeanFactoryAware

Overrides:

setBeanFactory in class AbstractExpressionEvaluator

setConversionService

public void setConversionService(org.springframework.core.convert.ConversionService conversionService)

Overrides:

setConversionService in class AbstractExpressionEvaluator

process

public T process(org.springframework.messaging.Message<?> message)
          throws java.lang.Exception

Throws:

java.lang.Exception

process

public T process(java.util.Collection<org.springframework.messaging.Message<?>> messages,
                 java.util.Map<java.lang.String,java.lang.Object> headers)
          throws java.lang.Exception

Throws:

java.lang.Exception

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

start

public void start()

Specified by:

start in interface org.springframework.context.Lifecycle

stop

public void stop()

Specified by:

stop in interface org.springframework.context.Lifecycle

isRunning

public boolean isRunning()

Specified by:

isRunning in interface org.springframework.context.Lifecycle