No Arguments Entry Point Resolver是定位Component类中的无参数方法的.Entry Point Resolver默认会忽略掉继承自Object类的notify(),toString()等方法。配置No Arguments Entry Point Resolver的代码如下
<no-arguments-entry-point-resolver acceptVoidMethods="true" />
如果想排除掉某些方法,可以使用exclude-entry-point标签,不过这种情况下默认对Object类的方法的忽略将会失效,需要添加<exclude-object-methods />节点
<no-arguments-entry-point-resolver acceptVoidMethods="true">
<exclude-entry-point method="xxxx" />
</no-arguments-entry-point-resolver>
如果想要在指定方法中进行匹配,可以使用include-entry-point标签
<no-arguments-entry-point-resolver acceptVoidMethods="true">
<include-entry-point method="xxxx" />
</no-arguments-entry-point-resolver>
我们在TestComponent中添加两个无参数的方法
public void NoArgumentEntryPointMethod1()
{
logger.info("NoArgumentEntryPointMethod is executed");
}
public void NoArgumentEntryPointMethod2()
{
logger.info("NoArgumentEntryPointMethod2 is executed");
}
在流程中使用以下配置
<no-arguments-entry-point-resolver acceptVoidMethods="true" />
启动项目后,可以看到由于有两个方法匹配,抛出了异常
NoArgumentsEntryPointResolver: Found too many possible methods
我们加入exclude-entry-point节点忽略掉NoArgumentEntryMethod1方法
<no-arguments-entry-point-resolver acceptVoidMethods="true" >
<exclude-object-methods />
<exclude-entry-point method="NoArgumentEntryPointMethod1" />
</no-arguments-entry-point-resolver>
这里如果不加exclude-object-methods节点,会抛出异常
Found too many possible methods on object "entrypointresolvertest.TestComponent" that accept parameters "{}", Methods matched are "[public void entrypointresolvertest.TestComponent.NoArgumentEntryPointMethod2(), public final void java.lang.Object.wait() throws java.lang.InterruptedException, public java.lang.String java.lang.Object.toString(), public native int java.lang.Object.hashCode(), public final native java.lang.Class java.lang.Object.getClass(), public final native void java.lang.Object.notify(), public final native void java.lang.Object.notifyAll()]"
从异常信息可以看出,Object类的一系列无参数方法也进入了匹配方法列表,从而会抛异常。
设置好后再启动项目,可以看到NoArgumentEntryMethod2方法被匹配执行
我们再使用include-entry-point节点,匹配NoArgumentEntryMethod1方法
<no-arguments-entry-point-resolver acceptVoidMethods="true" >
<include-entry-point method="NoArgumentEntryPointMethod1"/>
</no-arguments-entry-point-resolver>
启动项目,可以看到NoArgumentEntryMethod1方法被匹配执行
来源:oschina
链接:https://my.oschina.net/u/237688/blog/733481