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IN PROGRESS - issue INT-642: Add DefaultAggregator

Browse Source 
http://jira.springframework.org/browse/INT-642

Polished Alex' patch
This commit is contained in:
Iwein Fuld
2009-05-20 14:56:36 +00:00
parent 2b93373323
commit 399eee83b1
7 changed files with 297 additions and 48 deletions
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58
org.springframework.integration/src/main/java/org/springframework/integration/aggregator/DefaultMessageAggregator.java Normal file
View File

@@ -0,0 +1,58 @@
/*
* Copyright 2002-2008 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.integration.aggregator;
import java.util.ArrayList;
import java.util.List;
import org.springframework.integration.core.Message;
import org.springframework.integration.message.MessageBuilder;
/**
* The Default Message Aggregator implementation that combines a group of
* messages into a single message containing a {@link List} of all payloads. The
* elements of the List are in order of their receiving. Any MessageHeader value
* is ignored except the <code>correlationId</code>.
*
* <p>
* n The default strategy for determining whether a group is complete is based
* on the '<code>sequenceSize</code>' property of the header. Alternatively, a
* custom implementation of the {@link CompletionStrategy} may be provided.
* </p>
* <p>
* All considerations regarding <code>timeout</code> and grouping by
* <code>correlationId</code> from {@link AbstractMessageBarrierHandler} apply
* here as well.
* </p>
*
* @author Alex Peters
*
*/
public class DefaultMessageAggregator extends AbstractMessageAggregator {
/**
* {@inheritDoc}
*/
@Override
protected Message<?> aggregateMessages(List<Message<?>> messages) {
List<Object> payloads = new ArrayList<Object>(messages.size());
for (Message<?> message : messages) {
payloads.add(message.getPayload());
}
return MessageBuilder.withPayload(payloads).build();
}
}

80
org.springframework.integration/src/main/java/org/springframework/integration/config/xml/AggregatorParser.java
View File

@@ -20,7 +20,6 @@ import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.StringUtils;
import org.w3c.dom.Element;
/**
@@ -36,9 +35,9 @@ public class AggregatorParser extends AbstractConsumerEndpointParser {
private static final String COMPLETION_STRATEGY_METHOD_ATTRIBUTE = "completion-strategy-method";
private static final String CORRELATION_STRATEGY_REF_ATTRIBUTE = "correlation-strategy";
private static final String CORRELATION_STRATEGY_REF_ATTRIBUTE = "correlation-strategy";
private static final String CORRELATION_STRATEGY_METHOD_ATTRIBUTE = "correlation-strategy-method";
private static final String CORRELATION_STRATEGY_METHOD_ATTRIBUTE = "correlation-strategy-method";
private static final String DISCARD_CHANNEL_ATTRIBUTE = "discard-channel";
@@ -54,57 +53,74 @@ public class AggregatorParser extends AbstractConsumerEndpointParser {
private static final String COMPLETION_STRATEGY_PROPERTY = "completionStrategy";
private static final String CORRELATION_STRATEGY_PROPERTY = "correlationStrategy";
private static final String CORRELATION_STRATEGY_PROPERTY = "correlationStrategy";
@Override
protected BeanDefinitionBuilder parseHandler(Element element, ParserContext parserContext) {
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(
IntegrationNamespaceUtils.BASE_PACKAGE + ".aggregator.MethodInvokingAggregator");
BeanDefinitionBuilder builder;
String ref = element.getAttribute(REF_ATTRIBUTE);
if (!StringUtils.hasText(ref)) {
parserContext.getReaderContext().error("The '" + REF_ATTRIBUTE + "' attribute is required.", element);
if (StringUtils.hasText(ref)) {
builder = BeanDefinitionBuilder
.genericBeanDefinition(IntegrationNamespaceUtils.BASE_PACKAGE
+ ".aggregator.MethodInvokingAggregator");
builder.addConstructorArgReference(ref);
if (StringUtils.hasText(element.getAttribute(METHOD_ATTRIBUTE))) {
String method = element.getAttribute(METHOD_ATTRIBUTE);
builder.addConstructorArgValue(method);
}
}
builder.addConstructorArgReference(ref);
if (StringUtils.hasText(element.getAttribute(METHOD_ATTRIBUTE))) {
String method = element.getAttribute(METHOD_ATTRIBUTE);
builder.addConstructorArgValue(method);
else {
builder = BeanDefinitionBuilder
.genericBeanDefinition(IntegrationNamespaceUtils.BASE_PACKAGE
+ ".aggregator.DefaultMessageAggregator");
}
IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element, DISCARD_CHANNEL_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, SEND_TIMEOUT_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, SEND_PARTIAL_RESULT_ON_TIMEOUT_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, REAPER_INTERVAL_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, TRACKED_CORRELATION_ID_CAPACITY_ATTRIBUTE);
IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element,
DISCARD_CHANNEL_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element,
SEND_TIMEOUT_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element,
SEND_PARTIAL_RESULT_ON_TIMEOUT_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element,
REAPER_INTERVAL_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element,
TRACKED_CORRELATION_ID_CAPACITY_ATTRIBUTE);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "auto-startup");
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, TIMEOUT_ATTRIBUTE);
this.injectPropertyWithBean(COMPLETION_STRATEGY_REF_ATTRIBUTE, COMPLETION_STRATEGY_METHOD_ATTRIBUTE, COMPLETION_STRATEGY_PROPERTY,
"CompletionStrategyAdapter", element, builder, parserContext);
this.injectPropertyWithBean(CORRELATION_STRATEGY_REF_ATTRIBUTE, CORRELATION_STRATEGY_METHOD_ATTRIBUTE, CORRELATION_STRATEGY_PROPERTY,
"CorrelationStrategyAdapter", element, builder, parserContext);
this.injectPropertyWithBean(COMPLETION_STRATEGY_REF_ATTRIBUTE,
COMPLETION_STRATEGY_METHOD_ATTRIBUTE, COMPLETION_STRATEGY_PROPERTY,
"CompletionStrategyAdapter", element, builder, parserContext);
this.injectPropertyWithBean(CORRELATION_STRATEGY_REF_ATTRIBUTE,
CORRELATION_STRATEGY_METHOD_ATTRIBUTE, CORRELATION_STRATEGY_PROPERTY,
"CorrelationStrategyAdapter", element, builder, parserContext);
return builder;
}
private void injectPropertyWithBean(String beanRefAttribute, String methodRefAttribute, String beanProperty, String adapterClass,
Element element, BeanDefinitionBuilder builder, ParserContext parserContext) {
final String beanRef = element.getAttribute(beanRefAttribute);
final String beanMethod = element.getAttribute(methodRefAttribute);
private void injectPropertyWithBean(String beanRefAttribute, String methodRefAttribute,
String beanProperty, String adapterClass, Element element,
BeanDefinitionBuilder builder, ParserContext parserContext) {
final String beanRef = element.getAttribute(beanRefAttribute);
final String beanMethod = element.getAttribute(methodRefAttribute);
if (StringUtils.hasText(beanRef)) {
if (StringUtils.hasText(beanMethod)) {
String adapterBeanName = this.createAdapter(beanRef, beanMethod, adapterClass, parserContext);
String adapterBeanName = this.createAdapter(beanRef, beanMethod, adapterClass,
parserContext);
builder.addPropertyReference(beanProperty, adapterBeanName);
}
else {
builder.addPropertyReference(beanProperty, beanRef);
}
}
}
}
private String createAdapter(String ref, String method, String unqualifiedClassName, ParserContext parserContext) {
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(
IntegrationNamespaceUtils.BASE_PACKAGE + ".aggregator." + unqualifiedClassName);
private String createAdapter(String ref, String method, String unqualifiedClassName,
ParserContext parserContext) {
BeanDefinitionBuilder builder = BeanDefinitionBuilder
.genericBeanDefinition(IntegrationNamespaceUtils.BASE_PACKAGE + ".aggregator."
+ unqualifiedClassName);
builder.addConstructorArgReference(ref);
builder.addConstructorArgValue(method);
return BeanDefinitionReaderUtils.registerWithGeneratedName(builder.getBeanDefinition(), parserContext.getRegistry());
return BeanDefinitionReaderUtils.registerWithGeneratedName(builder.getBeanDefinition(),
parserContext.getRegistry());
}
}