rpc.turbo.invoke.ReflectInvoker Maven / Gradle / Ivy
package rpc.turbo.invoke;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
/**
* 50% performance of JavassistInvoker
*
* @author Hank
*
* @param
* the method return type
*/
public class ReflectInvoker implements Invoker {
public final int serviceId;
private final Object service;
public final Class clazz;
public final Method method;
private final Class[] parameterTypes;
private final int parameterCount;
/**
*
* @param serviceId
*
* @param service
* the service implemention
*
* @param clazz
* the service interface
*
* @param method
*/
public ReflectInvoker(int serviceId, Object service, Class clazz, Method method) {
this.serviceId = serviceId;
this.service = service;
this.clazz = clazz;
this.method = method;
this.parameterTypes = method.getParameterTypes();
this.parameterCount = parameterTypes.length;
if (service == null) {
throw new InvokeException("service cannot be null");
}
if (!clazz.isInstance(service)) {
throw new InvokeException("clazz is the interface, service is the implemention");
}
if (!clazz.equals(method.getDeclaringClass())) {
throw new InvokeException(clazz + " have no method: " + method);
}
if (!Modifier.isPublic(clazz.getModifiers())) {
throw new InvokeException("the method must be public");
}
}
/**
*
* @throws InvokeException
*/
@SuppressWarnings("unchecked")
public T invoke(Object... params) {
if (params == null) {
if (parameterCount != 0) {
throw new InvokeException("params count error");
} else {
try {
return (T) method.invoke(service);
} catch (Exception e) {
throw new InvokeException(e);
}
}
}
if (parameterCount != params.length) {
throw new InvokeException("params count error");
}
try {
return (T) method.invoke(service, params);
} catch (Exception e) {
throw new InvokeException(e);
}
}
@Override
public int hashCode() {
return serviceId;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
ReflectInvoker other = (ReflectInvoker) obj;
if (serviceId != other.serviceId)
return false;
return true;
}
}