fix the heartbeat bug

cat-client/src/main/resources/META-INF/dal/model/status-model.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <model model-package="com.dianping.cat.status.model" enable-sax-parser="true" enable-xml-schema="true"
 	enable-merger="true" enable-model-test="true" enable-base-visitor="true">
-	<entity name="status" class-name="StatusInfo" dynamic-attributes="true">
+	<entity name="status" class-name="StatusInfo">
 		<attribute name="timestamp" value-type="Date" format="yyyy-MM-dd HH:mm:ss.SSS" />
 	    <entity-ref name="runtime" />
 	    <entity-ref name="os" />
@@ -61,7 +61,7 @@
 		<attribute name="overflowed" value-type="long" primitive="true" />
 		<attribute name="bytes" value-type="long" primitive="true" />
 	</entity>
-	<entity name="extension">
+	<entity name="extension"  dynamic-attributes="true">
 		<attribute name="id" value-type="String" key="true"/>
 		<element name="description" value-type="String" escape="false"/>
 		<entity-ref name="extensionDetail" names ="details" type="map" method-find-or-create="true"/>

cat-consumer/src/main/java/com/dianping/cat/consumer/heartbeat/HeartbeatAnalyzer.java

 package com.dianping.cat.consumer.heartbeat;
 
+import java.io.File;
 import java.util.Calendar;
 import java.util.List;
 import java.util.Map;
@@ -7,6 +8,7 @@ import java.util.Map.Entry;
 
 import org.codehaus.plexus.logging.LogEnabled;
 import org.codehaus.plexus.logging.Logger;
+import org.unidal.helper.Files;
 import org.unidal.lookup.annotation.Inject;
 
 import com.dianping.cat.Cat;
@@ -120,16 +122,18 @@ public class HeartbeatAnalyzer extends AbstractMessageAnalyzer<HeartbeatReport>
 				disk.findOrCreateExtensionDetail(vinfo.getId() + " Free").setValue(vinfo.getFree());
 			}
 		}
-		Map<String, String> propertis = info.getDynamicAttributes();
 
-		for (Entry<String, String> entry : propertis.entrySet()) {
-			try {
-				double value = Double.parseDouble(entry.getValue());
-				Extension item = info.findOrCreateExtension("dal");
+		for (Extension ex : info.getExtensions().values()) {
+			Map<String, String> propertis = ex.getDynamicAttributes();
+			for (Entry<String, String> entry : propertis.entrySet()) {
+				try {
+					double value = Double.parseDouble(entry.getValue());
+					Extension item = info.findOrCreateExtension("dal");
 
-				item.findOrCreateExtensionDetail(entry.getKey()).setValue(value);
-			} catch (Exception e) {
-				Cat.logError("StatusExtension can only be double type", e);
+					item.findOrCreateExtensionDetail(entry.getKey()).setValue(value);
+				} catch (Exception e) {
+					Cat.logError("StatusExtension can only be double type", e);
+				}
 			}
 		}
 	}