Added PoolExecutorParser.

org.springframework.integration/src/main/java/org/springframework/integration/config/PoolExecutorParser.java

@@ -0,0 +1,74 @@
+/*
+ * 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.config;
+
+import java.util.concurrent.RejectedExecutionHandler;
+import java.util.concurrent.ThreadPoolExecutor;
+
+import org.w3c.dom.Element;
+
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.xml.AbstractSimpleBeanDefinitionParser;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+/**
+ * @author Mark Fisher
+ */
+public class PoolExecutorParser extends AbstractSimpleBeanDefinitionParser {
+
+	private static final String REJECTION_POLICY_ATTRIBUTE = "rejection-policy";
+
+	private static final String CORE_SIZE_ATTRIBUTE = "core-size";
+
+	private static final String MAX_SIZE_ATTRIBUTE = "max-size";
+
+
+	@Override
+	protected Class<?> getBeanClass(Element element) {
+		return ThreadPoolTaskExecutor.class;
+	}
+
+	@Override
+	protected boolean isEligibleAttribute(String attributeName) {
+		return !REJECTION_POLICY_ATTRIBUTE.equals(attributeName)
+				&& !CORE_SIZE_ATTRIBUTE.equals(attributeName)
+				&& !MAX_SIZE_ATTRIBUTE.equals(attributeName)
+				&& super.isEligibleAttribute(attributeName);
+	}
+
+	@Override
+	protected void postProcess(BeanDefinitionBuilder builder, Element element) {
+		String policyName = element.getAttribute(REJECTION_POLICY_ATTRIBUTE);
+		builder.addPropertyValue("rejectedExecutionHandler", createRejectedExecutionHandler(policyName));
+		builder.addPropertyValue("corePoolSize", element.getAttribute(CORE_SIZE_ATTRIBUTE));
+		builder.addPropertyValue("maxPoolSize", element.getAttribute(MAX_SIZE_ATTRIBUTE));
+	}
+
+	private RejectedExecutionHandler createRejectedExecutionHandler(String policyName) {
+		if (policyName.equals("ABORT")) {
+			return new ThreadPoolExecutor.AbortPolicy();
+		}
+		if (policyName.equals("DISCARD")) {
+			return new ThreadPoolExecutor.DiscardPolicy();
+		}
+		if (policyName.equals("DISCARD_OLDEST")) {
+			return new ThreadPoolExecutor.DiscardOldestPolicy();
+		}
+		return new ThreadPoolExecutor.CallerRunsPolicy();
+	}
+
+}