added "concurrency" property to Default/SimpleMessageListenerContainer and JmsActivationSpecConfig, supporting placeholders for the jms namespace "concurrency" attribute now (SPR-6232)

org.springframework.jms/src/main/java/org/springframework/jms/config/AbstractListenerContainerParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -270,28 +270,4 @@ abstract class AbstractListenerContainerParser implements BeanDefinitionParser {
 		return (Boolean) configDef.getPropertyValues().getPropertyValue("pubSubDomain").getValue();
 	}
 
-	protected int[] parseConcurrency(Element ele, ParserContext parserContext) {
-		String concurrency = ele.getAttribute(CONCURRENCY_ATTRIBUTE);
-		if (!StringUtils.hasText(concurrency)) {
-			return null;
-		}
-		try {
-			int separatorIndex = concurrency.indexOf('-');
-			if (separatorIndex != -1) {
-				int[] result = new int[2];
-				result[0] = Integer.parseInt(concurrency.substring(0, separatorIndex));
-				result[1] = Integer.parseInt(concurrency.substring(separatorIndex + 1, concurrency.length()));
-				return result;
-			}
-			else {
-				return new int[] {1, Integer.parseInt(concurrency)};
-			}
-		}
-		catch (NumberFormatException ex) {
-			parserContext.getReaderContext().error("Invalid concurrency value [" + concurrency + "]: only " +
-					"single maximum integer (e.g. \"5\") and minimum-maximum combo (e.g. \"3-5\") supported.", ele, ex);
-			return null;
-		}
-	}
-
 }

org.springframework.jms/src/main/java/org/springframework/jms/config/JcaListenerContainerParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -16,12 +16,13 @@
 
 package org.springframework.jms.config;
 
+import org.w3c.dom.Element;
+
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.RuntimeBeanReference;
 import org.springframework.beans.factory.support.RootBeanDefinition;
 import org.springframework.beans.factory.xml.ParserContext;
 import org.springframework.util.StringUtils;
-import org.w3c.dom.Element;
 
 /**
  * Parser for the JMS <code>&lt;jca-listener-container&gt;</code> element.
@@ -41,9 +42,8 @@ class JcaListenerContainerParser extends AbstractListenerContainerParser {
 		containerDef.setSource(parserContext.extractSource(containerEle));
 		containerDef.setBeanClassName("org.springframework.jms.listener.endpoint.JmsMessageEndpointManager");
 		
-		String resourceAdapterBeanName = "resourceAdapter";
 		if (containerEle.hasAttribute(RESOURCE_ADAPTER_ATTRIBUTE)) {
-			resourceAdapterBeanName = containerEle.getAttribute(RESOURCE_ADAPTER_ATTRIBUTE);
+			String resourceAdapterBeanName = containerEle.getAttribute(RESOURCE_ADAPTER_ATTRIBUTE);
 			if (!StringUtils.hasText(resourceAdapterBeanName)) {
 				parserContext.getReaderContext().error(
 						"Listener container 'resource-adapter' attribute contains empty value.", containerEle);
@@ -88,14 +88,9 @@ class JcaListenerContainerParser extends AbstractListenerContainerParser {
 					new RuntimeBeanReference(transactionManagerBeanName));
 		}
 
-		int[] concurrency = parseConcurrency(containerEle, parserContext);
-		if (concurrency != null) {
-			configDef.getPropertyValues().add("maxConcurrency", concurrency[1]);
-		}
-
-		String phase = containerEle.getAttribute(PHASE_ATTRIBUTE);
-		if (StringUtils.hasText(phase)) {
-			containerDef.getPropertyValues().add("phase", phase);
+		String concurrency = containerEle.getAttribute(CONCURRENCY_ATTRIBUTE);
+		if (StringUtils.hasText(concurrency)) {
+			configDef.getPropertyValues().add("concurrency", concurrency);
 		}
 
 		String prefetch = containerEle.getAttribute(PREFETCH_ATTRIBUTE);
@@ -103,6 +98,11 @@ class JcaListenerContainerParser extends AbstractListenerContainerParser {
 			configDef.getPropertyValues().add("prefetchSize", new Integer(prefetch));
 		}
 
+		String phase = containerEle.getAttribute(PHASE_ATTRIBUTE);
+		if (StringUtils.hasText(phase)) {
+			containerDef.getPropertyValues().add("phase", phase);
+		}
+
 		containerDef.getPropertyValues().add("activationSpecConfig", configDef);
 
 		return containerDef;

org.springframework.jms/src/main/java/org/springframework/jms/config/JmsListenerContainerParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -18,12 +18,13 @@ package org.springframework.jms.config;
 
 import javax.jms.Session;
 
+import org.w3c.dom.Element;
+
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.RuntimeBeanReference;
 import org.springframework.beans.factory.support.RootBeanDefinition;
 import org.springframework.beans.factory.xml.ParserContext;
 import org.springframework.util.StringUtils;
-import org.w3c.dom.Element;
 
 /**
  * Parser for the JMS <code>&lt;listener-container&gt;</code> element.
@@ -107,11 +108,6 @@ class JmsListenerContainerParser extends AbstractListenerContainerParser {
 					new RuntimeBeanReference(destinationResolverBeanName));
 		}
 
-		String phase = containerEle.getAttribute(PHASE_ATTRIBUTE);
-		if (StringUtils.hasText(phase)) {
-			containerDef.getPropertyValues().add("phase", phase);
-		}
-
 		String cache = containerEle.getAttribute(CACHE_ATTRIBUTE);
 		if (StringUtils.hasText(cache)) {
 			if (containerType.startsWith("simple")) {
@@ -148,15 +144,9 @@ class JmsListenerContainerParser extends AbstractListenerContainerParser {
 			}
 		}
 
-		int[] concurrency = parseConcurrency(containerEle, parserContext);
-		if (concurrency != null) {
-			if (containerType.startsWith("default")) {
-				containerDef.getPropertyValues().add("concurrentConsumers", concurrency[0]);
-				containerDef.getPropertyValues().add("maxConcurrentConsumers", concurrency[1]);
-			}
-			else {
-				containerDef.getPropertyValues().add("concurrentConsumers", concurrency[1]);
-			}
+		String concurrency = containerEle.getAttribute(CONCURRENCY_ATTRIBUTE);
+		if (StringUtils.hasText(concurrency)) {
+			containerDef.getPropertyValues().add("concurrency", concurrency);
 		}
 
 		String prefetch = containerEle.getAttribute(PREFETCH_ATTRIBUTE);
@@ -166,6 +156,11 @@ class JmsListenerContainerParser extends AbstractListenerContainerParser {
 			}
 		}
 
+		String phase = containerEle.getAttribute(PHASE_ATTRIBUTE);
+		if (StringUtils.hasText(phase)) {
+			containerDef.getPropertyValues().add("phase", phase);
+		}
+
 		return containerDef;
 	}
 

org.springframework.jms/src/main/java/org/springframework/jms/listener/DefaultMessageListenerContainer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -257,6 +257,31 @@ public class DefaultMessageListenerContainer extends AbstractPollingMessageListe
 	}
 
 
+	/**
+	 * Specify concurrency limits via a "lower-upper" String, e.g. "5-10", or a simple
+	 * upper limit String, e.g. "10" (the lower limit will be 1 in this case).
+	 * <p>This listener container will always hold on to the minimum number of consumers
+	 * ({@link #setConcurrentConsumers}) and will slowly scale up to the maximum number
+	 * of consumers {@link #setMaxConcurrentConsumers} in case of increasing load.
+	 */
+	public void setConcurrency(String concurrency) {
+		try {
+			int separatorIndex = concurrency.indexOf('-');
+			if (separatorIndex != -1) {
+				setConcurrentConsumers(Integer.parseInt(concurrency.substring(0, separatorIndex)));
+				setMaxConcurrentConsumers(Integer.parseInt(concurrency.substring(separatorIndex + 1, concurrency.length())));
+			}
+			else {
+				setConcurrentConsumers(1);
+				setMaxConcurrentConsumers(Integer.parseInt(concurrency));
+			}
+		}
+		catch (NumberFormatException ex) {
+			throw new IllegalArgumentException("Invalid concurrency value [" + concurrency + "]: only " +
+					"single maximum integer (e.g. \"5\") and minimum-maximum combo (e.g. \"3-5\") supported.");
+		}
+	}
+
 	/**
 	 * Specify the number of concurrent consumers to create. Default is 1.
 	 * <p>Specifying a higher value for this setting will increase the standard

org.springframework.jms/src/main/java/org/springframework/jms/listener/SimpleMessageListenerContainer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -89,6 +89,33 @@ public class SimpleMessageListenerContainer extends AbstractMessageListenerConta
 		return this.pubSubNoLocal;
 	}
 
+	/**
+	 * Specify concurrency limits via a "lower-upper" String, e.g. "5-10", or a simple
+	 * upper limit String, e.g. "10".
+	 * <p>This listener container will always hold on to the maximum number of
+	 * consumers {@link #setConcurrentConsumers} since it is unable to scale.
+	 * <p>This property is primarily supported for configuration compatibility with
+	 * {@link DefaultMessageListenerContainer}. For this local listener container,
+	 * generally use {@link #setConcurrentConsumers} instead.
+	 */
+	public void setConcurrency(String concurrency) {
+		try {
+			int separatorIndex = concurrency.indexOf('-');
+			if (separatorIndex != -1) {
+				setConcurrentConsumers(Integer.parseInt(concurrency.substring(separatorIndex + 1, concurrency.length())));
+			}
+			else {
+				setConcurrentConsumers(Integer.parseInt(concurrency));
+			}
+		}
+		catch (NumberFormatException ex) {
+			throw new IllegalArgumentException("Invalid concurrency value [" + concurrency + "]: only " +
+					"single maximum integer (e.g. \"5\") and minimum-maximum combo (e.g. \"3-5\") supported. " +
+					"Note that SimpleMessageListenerContainer will effectively ignore the minimum value and " +
+					"always keep a fixed number of consumers according to the maximum value.");
+		}
+	}
+
 	/**
 	 * Specify the number of concurrent consumers to create. Default is 1.
 	 * <p>Raising the number of concurrent consumers is recommendable in order

org.springframework.jms/src/main/java/org/springframework/jms/listener/endpoint/JmsActivationSpecConfig.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2007 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -18,6 +18,8 @@ package org.springframework.jms.listener.endpoint;
 
 import javax.jms.Session;
 
+import org.springframework.core.Constants;
+
 /**
  * Common configuration object for activating a JMS message endpoint.
  * Gets converted into a provider-specific JCA 1.5 ActivationSpec
@@ -34,6 +36,10 @@ import javax.jms.Session;
  */
 public class JmsActivationSpecConfig {
 
+	/** Constants instance for javax.jms.Session */
+	private static final Constants sessionConstants = new Constants(Session.class);
+
+
 	private String destinationName;
 
 	private boolean pubSubDomain = false;
@@ -101,26 +107,96 @@ public class JmsActivationSpecConfig {
 		return this.messageSelector;
 	}
 
+	/**
+	 * Set the JMS acknowledgement mode by the name of the corresponding constant
+	 * in the JMS {@link Session} interface, e.g. "CLIENT_ACKNOWLEDGE".
+	 * <p>Note that JCA resource adapters generally only support auto and dups-ok
+	 * (see Spring's {@link StandardJmsActivationSpecFactory}). ActiveMQ also
+	 * supports "SESSION_TRANSACTED" in the form of RA-managed transactions
+	 * (automatically translated by Spring's {@link DefaultJmsActivationSpecFactory}.
+	 * @param constantName the name of the {@link Session} acknowledge mode constant
+	 * @see javax.jms.Session#AUTO_ACKNOWLEDGE
+	 * @see javax.jms.Session#CLIENT_ACKNOWLEDGE
+	 * @see javax.jms.Session#DUPS_OK_ACKNOWLEDGE
+	 * @see javax.jms.Session#SESSION_TRANSACTED
+	 * @see StandardJmsActivationSpecFactory
+	 * @see DefaultJmsActivationSpecFactory
+	 */
+	public void setAcknowledgeModeName(String constantName) {
+		setAcknowledgeMode(sessionConstants.asNumber(constantName).intValue());
+	}
+
+	/**
+	 * Set the JMS acknowledgement mode to use.
+	 * @see javax.jms.Session#AUTO_ACKNOWLEDGE
+	 * @see javax.jms.Session#CLIENT_ACKNOWLEDGE
+	 * @see javax.jms.Session#DUPS_OK_ACKNOWLEDGE
+	 * @see javax.jms.Session#SESSION_TRANSACTED
+	 */
 	public void setAcknowledgeMode(int acknowledgeMode) {
 		this.acknowledgeMode = acknowledgeMode;
 	}
 
+	/**
+	 * Return the JMS acknowledgement mode to use.
+	 */
 	public int getAcknowledgeMode() {
 		return this.acknowledgeMode;
 	}
 
+	/**
+	 * Specify concurrency limits via a "lower-upper" String, e.g. "5-10", or a simple
+	 * upper limit String, e.g. "10".
+	 * <p>JCA listener containers will always scale from zero to the given upper limit.
+	 * A specified lower limit will effectively be ignored.
+	 * <p>This property is primarily supported for configuration compatibility with
+	 * {@link org.springframework.jms.listener.DefaultMessageListenerContainer}.
+	 * For this activation config, generally use {@link #setMaxConcurrency} instead.
+	 */
+	public void setConcurrency(String concurrency) {
+		try {
+			int separatorIndex = concurrency.indexOf('-');
+			if (separatorIndex != -1) {
+				setMaxConcurrency(Integer.parseInt(concurrency.substring(separatorIndex + 1, concurrency.length())));
+			}
+			else {
+				setMaxConcurrency(Integer.parseInt(concurrency));
+			}
+		}
+		catch (NumberFormatException ex) {
+			throw new IllegalArgumentException("Invalid concurrency value [" + concurrency + "]: only " +
+					"single maximum integer (e.g. \"5\") and minimum-maximum combo (e.g. \"3-5\") supported. " +
+					"Note that JmsActivationSpecConfig will effectively ignore the minimum value and " +
+					"scale from zero up to the number of consumers according to the maximum value.");
+		}
+	}
+
+	/**
+	 * Specify the maximum number of consumers/sessions to use, effectively
+	 * controlling the number of concurrent invocations on the target listener.
+	 */
 	public void setMaxConcurrency(int maxConcurrency) {
 		this.maxConcurrency = maxConcurrency;
 	}
 
+	/**
+	 * Return the maximum number of consumers/sessions to use.
+	 */
 	public int getMaxConcurrency() {
 		return this.maxConcurrency;
 	}
 
+	/**
+	 * Specify the maximum number of messages to load into a session
+	 * (a kind of batch size).
+	 */
 	public void setPrefetchSize(int prefetchSize) {
 		this.prefetchSize = prefetchSize;
 	}
 
+	/**
+	 * Return the maximum number of messages to load into a session.
+	 */
 	public int getPrefetchSize() {
 		return this.prefetchSize;
 	}

org.springframework.jms/src/test/java/org/springframework/jms/config/JmsNamespaceHandlerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -86,9 +86,13 @@ public class JmsNamespaceHandlerTests extends TestCase {
 		for (DefaultMessageListenerContainer container : containers.values()) {
 			if (container.getConnectionFactory().equals(defaultConnectionFactory)) {
 				defaultConnectionFactoryCount++;
+				assertEquals(2, container.getConcurrentConsumers());
+				assertEquals(3, container.getMaxConcurrentConsumers());
 			}
 			else if (container.getConnectionFactory().equals(explicitConnectionFactory)) {
 				explicitConnectionFactoryCount++;
+				assertEquals(1, container.getConcurrentConsumers());
+				assertEquals(2, container.getMaxConcurrentConsumers());
 			}
 		}
 

org.springframework.jms/src/test/java/org/springframework/jms/config/jmsNamespaceHandlerTests.xml

@@ -7,16 +7,24 @@
 
 	<jms:listener-container connection-factory="testConnectionFactory" task-executor="testTaskExecutor"
 			destination-resolver="testDestinationResolver" message-converter="testMessageConverter"
-			transaction-manager="testTransactionManager" error-handler="testErrorHandler" phase="99">
+			transaction-manager="testTransactionManager" error-handler="testErrorHandler" concurrency="1-2" phase="99">
 		<jms:listener id="listener1" destination="testDestination" ref="testBean1" method="setName"/>
 		<jms:listener id="listener2" destination="testDestination" ref="testBean2" method="setName" response-destination="responseDestination"/>
 	</jms:listener-container>
 
 	<!-- TODO: remove the task-executor reference once issue with blocking on stop is resolved -->
-	<jms:listener-container task-executor="testTaskExecutor">
+	<jms:listener-container task-executor="testTaskExecutor" concurrency="${concurrency}">
 		<jms:listener destination="testDestination" ref="testBean3"/>
 	</jms:listener-container>
 
+	<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
+		<property name="properties">
+			<props>
+				<prop key="concurrency">2-3</prop>
+			</props>
+		</property>
+	</bean>
+
 	<jms:jca-listener-container resource-adapter="testResourceAdapter" activation-spec-factory="testActivationSpecFactory"
 			message-converter="testMessageConverter" phase="77">
 		<jms:listener id="listener3" destination="testDestination" ref="testBean1" method="setName"/>