INT-631 Added MailReceiverFactoryBean.

org.springframework.integration.mail/src/main/java/org/springframework/integration/mail/config/MailInboundChannelAdapterParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2008 the original author or authors.
+ * Copyright 2002-2009 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.
@@ -22,10 +22,6 @@ import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
 import org.springframework.beans.factory.xml.ParserContext;
 import org.springframework.integration.config.xml.AbstractPollingInboundChannelAdapterParser;
-import org.springframework.integration.mail.ImapMailReceiver;
-import org.springframework.integration.mail.MailReceiver;
-import org.springframework.integration.mail.MailReceivingMessageSource;
-import org.springframework.integration.mail.Pop3MailReceiver;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 import org.springframework.util.xml.DomUtils;
@@ -39,39 +35,35 @@ import org.springframework.util.xml.DomUtils;
  */
 public class MailInboundChannelAdapterParser extends AbstractPollingInboundChannelAdapterParser {
 
+	private static final String BASE_PACKAGE = "org.springframework.integration.mail";
+
+
 	@Override
 	protected String parseSource(Element element, ParserContext parserContext) {
-		BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(MailReceivingMessageSource.class);
+		BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(
+				BASE_PACKAGE + ".MailReceivingMessageSource");
 		builder.addConstructorArgReference(this.parseMailReceiver(element, parserContext));
 		return BeanDefinitionReaderUtils.registerWithGeneratedName(
 				builder.getBeanDefinition(), parserContext.getRegistry());
 	}
 
 	private String parseMailReceiver(Element element, ParserContext parserContext) {
-		String uri = element.getAttribute("store-uri");
-		Assert.hasText(uri, "the 'store-uri' attribute is required");
-		boolean isPop3 = uri.toLowerCase().startsWith("pop3");
-		boolean isImap = uri.toLowerCase().startsWith("imap");
-		Assert.isTrue(isPop3 || isImap, "the 'store-uri' must begin with 'pop3' or 'imap'");
-		Class<? extends MailReceiver> receiverClass = isPop3 ? Pop3MailReceiver.class : ImapMailReceiver.class;
-		BeanDefinitionBuilder receiverBuilder = BeanDefinitionBuilder.genericBeanDefinition(receiverClass);
-		receiverBuilder.addConstructorArgValue(uri);
+		String storeUri = element.getAttribute("store-uri");
+		Assert.hasText(storeUri, "the 'store-uri' attribute is required");
+		BeanDefinitionBuilder receiverBuilder = BeanDefinitionBuilder.genericBeanDefinition(
+				BASE_PACKAGE + ".config.MailReceiverFactoryBean");
+		receiverBuilder.addPropertyValue("storeUri", storeUri);
 		String propertiesRef = element.getAttribute("java-mail-properties");
 		if (StringUtils.hasText(propertiesRef)) {
 			receiverBuilder.addPropertyReference("javaMailProperties", propertiesRef);
 		}
-		boolean configuredFetchSize = false;
 		Element pollerElement = DomUtils.getChildElementByTagName(element, "poller");
 		if (pollerElement != null) {
 			String mmpp = pollerElement.getAttribute("max-messages-per-poll");
 			if (StringUtils.hasText(mmpp)) {
 				receiverBuilder.addPropertyValue("maxFetchSize", mmpp);
-				configuredFetchSize = true;
 			}
 		}
-		if (!configuredFetchSize) {
-			receiverBuilder.addPropertyValue("maxFetchSize", 1);
-		}
 		return BeanDefinitionReaderUtils.registerWithGeneratedName(
 				receiverBuilder.getBeanDefinition(), parserContext.getRegistry());
 	}

org.springframework.integration.mail/src/main/java/org/springframework/integration/mail/config/MailReceiverFactoryBean.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2002-2009 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.mail.config;
+
+import java.util.Properties;
+
+import org.springframework.beans.factory.DisposableBean;
+import org.springframework.beans.factory.FactoryBean;
+import org.springframework.integration.mail.AbstractMailReceiver;
+import org.springframework.integration.mail.ImapMailReceiver;
+import org.springframework.integration.mail.MailReceiver;
+import org.springframework.integration.mail.Pop3MailReceiver;
+import org.springframework.util.Assert;
+
+/**
+ * @author Mark Fisher
+ * @since 1.0.3
+ */
+public class MailReceiverFactoryBean implements FactoryBean, DisposableBean {
+
+	private volatile String storeUri;
+
+	private volatile MailReceiver receiver;
+
+	private volatile Properties javaMailProperties;
+
+	private volatile int maxFetchSize = 1;
+
+
+	public void setStoreUri(String storeUri) {
+		this.storeUri = storeUri;
+	}
+
+	public void setJavaMailProperties(Properties javaMailProperties) {
+		this.javaMailProperties = javaMailProperties;
+	}
+
+	public void setMaxFetchSize(int maxFetchSize) {
+		this.maxFetchSize = maxFetchSize;
+	}
+
+	public Object getObject() throws Exception {
+		if (this.receiver == null) {
+			this.receiver = this.createReceiver();
+		}
+		return this.receiver;
+	}
+
+	public Class<?> getObjectType() {
+		return (this.receiver != null) ? this.receiver.getClass() : MailReceiver.class;
+	}
+
+	public boolean isSingleton() {
+		return true;
+	}
+
+	private MailReceiver createReceiver() {
+		Assert.hasText(this.storeUri, "the store URI is required");
+		boolean isPop3 = this.storeUri.toLowerCase().startsWith("pop3");
+		boolean isImap = this.storeUri.toLowerCase().startsWith("imap");
+		Assert.isTrue(isPop3 || isImap, "the store URI must begin with 'pop3' or 'imap'");
+		AbstractMailReceiver receiver = isPop3 ? new Pop3MailReceiver(this.storeUri) : new ImapMailReceiver(this.storeUri);
+		if (this.javaMailProperties != null) {
+			receiver.setJavaMailProperties(this.javaMailProperties);
+		}
+		receiver.setMaxFetchSize(this.maxFetchSize);
+		return receiver;
+	}
+
+	public void destroy() throws Exception {
+		if (this.receiver != null && this.receiver instanceof DisposableBean) {
+			((DisposableBean) this.receiver).destroy();
+		}
+	}
+
+}