Java tutorial
/* * Copyright (c) 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.zkybase.kite.throttle.interceptor; import java.io.Serializable; import java.lang.reflect.Method; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.aop.support.StaticMethodMatcherPointcut; import org.springframework.util.ObjectUtils; /** * A throttle pointcut that matches iff either the underlying source has a throttle for the given method. * * @author Willie Wheeler * @since 1.0 */ @SuppressWarnings("serial") public class ThrottleSourcePointcut extends StaticMethodMatcherPointcut implements Serializable { private static Logger log = LoggerFactory.getLogger(ThrottleSourcePointcut.class); private ThrottleSource source; public ThrottleSource getSource() { return source; } public void setSource(ThrottleSource source) { this.source = source; } public boolean matches(Method method, Class<?> targetClass) { if (source == null) { throw new IllegalStateException("source can't be null"); } boolean match = source.getThrottle(method, targetClass) != null; if (match) { log.debug("Found pointcut match for {}.{}", targetClass.getName(), method.getName()); } return match; } @Override public boolean equals(Object other) { if (this == other) { return true; } if (!(other instanceof ThrottleSourcePointcut)) { return false; } ThrottleSourcePointcut otherPc = (ThrottleSourcePointcut) other; return ObjectUtils.nullSafeEquals(source, otherPc.source); } @Override public int hashCode() { return ThrottleSourcePointcut.class.hashCode(); } @Override public String toString() { return getClass().getName() + ": " + source; } }