initial commit for NotificationListeningAdapter

org.springframework.integration.jmx/src/main/java/org/springframework/integration/jmx/JmxHeaders.java

@@ -0,0 +1,31 @@
+/*
+ * 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.jmx;
+
+import org.springframework.integration.core.MessageHeaders;
+
+/**
+ * @author Mark Fisher
+ * @since 2.0
+ */
+public abstract class JmxHeaders {
+
+	private static final String PREFIX = MessageHeaders.PREFIX + "jmx";
+
+	public static final String NOTIFICATION_HANDBACK = PREFIX + "_handback";
+
+}

org.springframework.integration.jmx/src/main/java/org/springframework/integration/jmx/NotificationListeningAdapter.java

@@ -0,0 +1,115 @@
+/*
+ * 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.jmx;
+
+import java.util.Arrays;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import javax.management.InstanceNotFoundException;
+import javax.management.ListenerNotFoundException;
+import javax.management.MBeanServer;
+import javax.management.Notification;
+import javax.management.NotificationFilter;
+import javax.management.NotificationListener;
+import javax.management.ObjectName;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import org.springframework.integration.core.Message;
+import org.springframework.integration.core.MessageHistory.ComponentType;
+import org.springframework.integration.endpoint.MessageProducerSupport;
+import org.springframework.integration.message.MessageBuilder;
+import org.springframework.util.Assert;
+
+/**
+ * @author Mark Fisher
+ * @since 2.0
+ */
+public class NotificationListeningAdapter extends MessageProducerSupport implements NotificationListener {
+
+	private final Log logger = LogFactory.getLog(this.getClass());
+
+	private volatile MBeanServer server;
+
+	private volatile Set<ObjectName> objectNames;
+
+	private volatile NotificationFilter filter;
+
+	private volatile Object handback;
+
+
+	public void setServer(MBeanServer server) {
+		this.server = server;
+	}
+
+	public void setObjectNames(ObjectName... objectNames) {
+		this.objectNames = new LinkedHashSet<ObjectName>(Arrays.asList(objectNames));
+	}
+
+	public void setFilter(NotificationFilter filter) {
+		this.filter = filter;
+	}
+
+	public void setHandback(Object handback) {
+		this.handback = handback;
+	}
+
+	public void handleNotification(Notification notification, Object handback) {
+		if (logger.isInfoEnabled()) {
+			logger.info("received notification: " + notification + ", and handback: " + handback);
+		}
+		MessageBuilder<?> builder = MessageBuilder.withPayload(notification);
+		if (handback != null) {
+			builder.setHeader(JmxHeaders.NOTIFICATION_HANDBACK, handback);
+		}
+		Message<?> message = builder.build();
+		message.getHeaders().getHistory().add(ComponentType.endpoint, this.getBeanName());
+		this.sendMessage(message);
+	}
+
+	@Override
+	protected void doStart() {
+		try {
+			Assert.notNull(this.server, "MBeanServer is required.");
+			for (ObjectName objectName : this.objectNames) {
+				this.server.addNotificationListener(objectName, this, this.filter, this.handback);
+			}
+		}
+		catch (InstanceNotFoundException e) {
+			throw new IllegalStateException("Failed to find MBean instance.", e); 
+		}
+	}
+
+	@Override
+	protected void doStop() {
+		try {
+			Assert.notNull(this.server, "MBeanServer is required.");
+			for (ObjectName objectName : this.objectNames) {
+				this.server.removeNotificationListener(objectName, this, this.filter, this.handback);
+			}
+		}
+		catch (InstanceNotFoundException e) {
+			throw new IllegalStateException("Failed to find MBean instance.", e); 
+		}
+		catch (ListenerNotFoundException e) {
+			throw new IllegalStateException("Failed to find NotificationListener.", e); 
+		}
+	}
+
+}