INT-910 moved AbstractScriptExecutingMessageProcessor

spring-integration-core/src/main/java/org/springframework/integration/handler/AbstractScriptExecutingMessageProcessor.java

@@ -0,0 +1,62 @@
+/*
+ * 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.
+ * 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.handler;
+
+import org.springframework.integration.core.Message;
+import org.springframework.integration.message.MessageHandlingException;
+import org.springframework.scripting.ScriptSource;
+import org.springframework.util.Assert;
+
+/**
+ * Base {@link MessageProcessor} for scripting implementations to extend.
+ * 
+ * @author Mark Fisher
+ * @since 2.0
+ */
+public abstract class AbstractScriptExecutingMessageProcessor implements MessageProcessor {
+
+	private final ScriptSource scriptSource;
+
+
+	/**
+	 * Create a processor for the given {@link ScriptSource}.
+	 */
+	public AbstractScriptExecutingMessageProcessor(ScriptSource scriptSource) {
+		Assert.notNull(scriptSource, "scriptSource must not be null");
+		this.scriptSource = scriptSource;
+	}
+
+
+	/**
+	 * Executes the script and returns the result.
+	 */
+	public final Object processMessage(Message<?> message) {
+		try {
+			return this.executeScript(this.scriptSource, message);
+		}
+		catch (Exception e) {
+			throw new MessageHandlingException(message, "failed to execute script", e);
+		}
+	}
+
+	/**
+	 * Subclasses must implement this method. In doing so, the execution context for the
+	 * script should be populated with the Message's 'payload' and 'headers' as variables. 
+	 */
+	protected abstract Object executeScript(ScriptSource scriptSource, Message<?> message) throws Exception;
+
+}