我想要做的是: 通過JMX公開呼叫統計信息(基本上調用計數和平均呼叫時間)。 問題是我想用AspectJ支持來做到這一點(爲我的實現類自動計算它)。使用JMX編程式公開呼叫統計信息
我創造了什麼是JmxBean:
public class JmxStatistics implements Serializable {
private final String name;
private long errorCount;
private long errorCallTime;
private long successCount;
private long successCallTime;
public JmxStatistics(String name) {
this.name = name;
}
public synchronized long getCallCount() {
return errorCount + successCount;
}
public synchronized long getAvgCallTimeInMillisecs() {
return (errorCallTime + successCallTime)/getCallCount();
}
public synchronized long getAvgSuccessfulCallTimeInMillisecs() {
return (errorCallTime + successCallTime)/successCount;
}
public synchronized long getAvgFailedCallTimeInMillisecs() {
return (errorCallTime + successCallTime)/errorCount;
}
public synchronized void increaseErrorCallTime(long sumCallTime) {
this.errorCallTime += sumCallTime;
}
public synchronized void increaseSuccessCallTime(long sumCallTime) {
this.successCallTime += sumCallTime;
}
public synchronized long getErrorCount() {
return errorCount;
}
public synchronized void incrementErrorCount() {
this.errorCount++;
}
public synchronized long getSuccessCount() {
return successCount;
}
public synchronized void incrementSuccessCount() {
this.successCount++;
}
@Override
public String toString() {
return name + "{" + "callCount=" + getCallCount()
+ " (s: " + successCount + ",e:" + errorCount + "); "
+ "avgCallTime=" + getAvgCallTimeInMillisecs() + "ms "
+ "(" + getAvgSuccessfulCallTimeInMillisecs() + "ms;e:" + getAvgFailedCallTimeInMillisecs() + "ms)" + "}";
}
的AOP包點:
public Object wrap(ProceedingJoinPoint joinPoint) throws Throwable {
JmxStatistics jmxs = store.getStatisticsBean(joinPoint);
long start = System.currentTimeMillis();
Object result;
try {
result = joinPoint.proceed();
} catch (Throwable t) {
long runtime = System.currentTimeMillis() - start;
jmxs.incrementErrorCount();
jmxs.increaseErrorCallTime(runtime);
throw t;
}
long runtime = System.currentTimeMillis() - start;
jmxs.incrementSuccessCount();
jmxs.increaseSuccessCallTime(runtime);
return result;
}
而對於公開所有(編程創建)JMX豆商店:
public class JmxStatisticsStore {
private final HashMap<String, JmxStatistics> jmxBeans = new HashMap<>();
public HashMap<String, JmxStatistics> getJmxBeans() {
return jmxBeans;
}
JmxStatistics getStatisticsBean(ProceedingJoinPoint joinPoint) {
String id = joinPoint.getTarget().getClass().toString() + "." + joinPoint.getSignature().getName();
if (!jmxBeans.containsKey(id)) {
synchronized (jmxBeans) {
if (!jmxBeans.containsKey(id)) {
JmxStatistics jmxStatistics = new JmxStatistics(id);
jmxBeans.put(id, jmxStatistics);
}
}
}
return jmxBeans.get(id);
}
}
我想爲此使用Spring AOP和MBeanExporter。我的配置如下:
<bean id="jmxStatisticsStore" class="package.JmxStatisticsStore"/>
<bean id="jmxAspect" class="package.AspectJJmxCalculator" />
<aop:config>
<aop:aspect id="jmxAspectId" ref="jmxAspect">
<aop:pointcut id="pointCutAround"
expression="execution(* jmx.tester..*.*(..))" />
<aop:around method="wrap" pointcut-ref="pointCutAround" />
</aop:aspect>
</aop:config>
<bean id="exporter" class="org.springframework.jmx.export.MBeanExporter" lazy-init="false">
<property name="beans">
<map>
<entry key="bean:name=callStatistics" value-ref="jmxStatisticsStore"/>
</map>
</property>
</bean>
目前,我嘗試在Tomcat的運行它(jmx.tester包有我在web應用程序使用的Spring bean)。該webapp運行正常,並與JConsole我可以連接到服務器。在服務器上,在bean下,我可以看到帶有HashMap屬性的callStatistics bean。
直到我沒有打電話,散列表是空的(這很好)(在「Value」框中顯示{}) 在我撥打電話後(因此散列表不再爲空),價值變得不可用,如果我嘗試調用通過JMX的getJmxBeans方法,我得到以下異常:
Problem invoking getJmxBeans: java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.lang.ClassNotFoundException: package.JmxStatistics (no security manager: RMI class loader disabled)
編輯:我想看到的是,對於不同的ID來電顯示爲單獨的JMX屬性。
有沒有辦法做我想完成的事情? Thx
嗯......稍後會檢查這一點,如果它是比我們現在更好的解決方案 – SzaboAdam 2014-09-30 13:53:59