sentinel upgrade to 0.1.1 and add annotation support in RestTemplate with sentinel
fangjian0423
7 years ago
parent
8f21f1abce
commit
4551e94d18
@ -0,0 +1,59 @@
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/*
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* Copyright (C) 2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.cloud.alibaba.sentinel.custom;
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import java.lang.reflect.Method;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import com.alibaba.csp.sentinel.util.StringUtil;
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/**
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* @author fangjian
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*/
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final class BlockClassRegistry {
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private static final Map<String, Method> FALLBACK_MAP = new ConcurrentHashMap<>();
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private static final Map<String, Method> BLOCK_HANDLER_MAP = new ConcurrentHashMap<>();
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static Method lookupFallback(Class<?> clazz, String name) {
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return FALLBACK_MAP.get(getKey(clazz, name));
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}
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static Method lookupBlockHandler(Class<?> clazz, String name) {
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return BLOCK_HANDLER_MAP.get(getKey(clazz, name));
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}
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static void updateFallbackFor(Class<?> clazz, String name, Method method) {
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if (clazz == null || StringUtil.isBlank(name)) {
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throw new IllegalArgumentException("Bad argument");
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}
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FALLBACK_MAP.put(getKey(clazz, name), method);
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}
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static void updateBlockHandlerFor(Class<?> clazz, String name, Method method) {
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if (clazz == null || StringUtil.isBlank(name)) {
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throw new IllegalArgumentException("Bad argument");
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}
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BLOCK_HANDLER_MAP.put(getKey(clazz, name), method);
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}
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private static String getKey(Class<?> clazz, String name) {
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return String.format("%s:%s", clazz.getCanonicalName(), name);
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}
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}
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@ -1,41 +0,0 @@
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/*
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* Copyright (C) 2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.cloud.alibaba.sentinel.custom;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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/**
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* Annotation to add Sentinel to custom method
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* @author xiaojing
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*/
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@Target(ElementType.METHOD)
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@Retention(RetentionPolicy.RUNTIME)
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public @interface EnableSentinel {
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/**
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* @return sentinel resource value
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*/
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String value();
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/**
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* @return Sentinel BlockException Handler name
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*/
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String handler() default "";
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}
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@ -1,46 +0,0 @@
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/*
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* Copyright (C) 2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.cloud.alibaba.sentinel.custom;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* @author xiaojing
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*/
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public class HandlerUtil {
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private static final ConcurrentHashMap<String, SentinelBlockHandler> map = new ConcurrentHashMap<>(
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16);
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/**
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* you should add your custom handler before use it
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* @param name see {@link EnableSentinel#handler()}
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* @param handler you custom handler
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*/
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public static void addHandler(String name, SentinelBlockHandler handler) {
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map.put(name, handler);
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}
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public static SentinelBlockHandler getHandler(String name) {
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SentinelBlockHandler handler = map.get(name);
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if (null == handler) {
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throw new RuntimeException("cannot find handler name=<" + name
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+ ",> did you forgot to invoke HandlerUtil.addHandler(name, handler) ?");
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}
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return handler;
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}
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}
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@ -1,109 +0,0 @@
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/*
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* Copyright (C) 2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.cloud.alibaba.sentinel.custom;
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import java.lang.annotation.Annotation;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import com.alibaba.csp.sentinel.Entry;
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import com.alibaba.csp.sentinel.SphU;
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import com.alibaba.csp.sentinel.context.ContextUtil;
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import com.alibaba.csp.sentinel.slots.block.BlockException;
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import org.aspectj.lang.ProceedingJoinPoint;
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import org.aspectj.lang.annotation.Around;
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import org.aspectj.lang.annotation.Aspect;
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import org.aspectj.lang.reflect.MethodSignature;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* @author xiaojing
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*/
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@Aspect
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public class SentinelAspect {
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private static final Logger LOGGER = LoggerFactory.getLogger(SentinelAspect.class);
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@Around("@annotation(org.springframework.cloud.alibaba.sentinel.custom.EnableSentinel)")
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public Object customBlock(ProceedingJoinPoint pjp) throws Throwable {
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SentinelEntry sentinelEntry = new SentinelEntry();
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try {
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beforeProceed(sentinelEntry, pjp);
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return pjp.proceed();
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}
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catch (BlockException e) {
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LOGGER.error(e.getMessage(), e);
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if (null != sentinelEntry.getHandler()
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&& sentinelEntry.getHandler().length() > 0) {
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return HandlerUtil.getHandler(sentinelEntry.getHandler()).handler(e);
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}
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else {
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throw e;
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}
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}
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finally {
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releaseContextResources(sentinelEntry);
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}
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}
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private void beforeProceed(SentinelEntry sentinelEntry, ProceedingJoinPoint pjp)
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throws BlockException {
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Method method = getMethod(pjp);
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int modifiers = method.getModifiers();
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if (!Modifier.isPublic(modifiers) || "toString".equals(method.getName())
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|| "hashCode".equals(method.getName())
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|| "equals".equals(method.getName())
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|| "finalize".equals(method.getName())) {
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return;
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}
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Annotation[] annotations = method.getDeclaredAnnotations();
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for (Annotation annotation : annotations) {
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if (annotation instanceof EnableSentinel) {
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sentinelEntry.setKey(((EnableSentinel) annotation).value());
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sentinelEntry.setHandler(((EnableSentinel) annotation).handler());
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}
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}
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if (null == sentinelEntry.getKey() || sentinelEntry.getKey().length() == 0) {
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return;
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}
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ContextUtil.enter(sentinelEntry.getKey());
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sentinelEntry.setEntry(SphU.entry(sentinelEntry.getKey()));
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}
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private void releaseContextResources(SentinelEntry sentinelEntry) {
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if (null == sentinelEntry.getEntry()) {
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return;
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}
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Entry entry = sentinelEntry.getEntry();
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entry.exit();
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ContextUtil.exit();
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}
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private Method getMethod(ProceedingJoinPoint joinPoint) {
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MethodSignature signature = (MethodSignature) joinPoint.getSignature();
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return signature.getMethod();
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}
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}
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@ -0,0 +1,46 @@
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/*
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* Copyright (C) 2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.cloud.alibaba.sentinel.custom;
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import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
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import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.web.client.RestTemplate;
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import com.alibaba.csp.sentinel.annotation.aspectj.SentinelResourceAspect;
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/**
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* @author xiaojing
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*/
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@Configuration
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public class SentinelAutoConfiguration {
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@Bean
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@ConditionalOnMissingBean
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public SentinelResourceAspect sentinelResourceAspect() {
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return new SentinelResourceAspect();
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}
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@Bean
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@ConditionalOnMissingBean
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@ConditionalOnClass(value = RestTemplate.class)
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public SentinelBeanPostProcessor sentinelBeanPostProcessor() {
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return new SentinelBeanPostProcessor();
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}
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}
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@ -0,0 +1,106 @@
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/*
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* Copyright (C) 2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.cloud.alibaba.sentinel.custom;
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import java.util.concurrent.ConcurrentHashMap;
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import org.springframework.beans.BeansException;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.config.BeanDefinition;
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import org.springframework.beans.factory.support.BeanDefinitionBuilder;
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import org.springframework.beans.factory.support.DefaultListableBeanFactory;
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import org.springframework.beans.factory.support.MergedBeanDefinitionPostProcessor;
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import org.springframework.beans.factory.support.RootBeanDefinition;
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import org.springframework.cloud.alibaba.sentinel.annotation.SentinelProtect;
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import org.springframework.context.ApplicationContext;
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import org.springframework.core.type.StandardMethodMetadata;
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import org.springframework.util.StringUtils;
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import org.springframework.web.client.RestTemplate;
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/**
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* PostProcessor handle @SentinelProtect Annotation, add interceptor for RestTemplate
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*
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* @author fangjian
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* @see SentinelProtect
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* @see SentinelProtectInterceptor
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*/
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public class SentinelBeanPostProcessor implements MergedBeanDefinitionPostProcessor {
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@Autowired
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private ApplicationContext applicationContext;
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private ConcurrentHashMap<String, SentinelProtect> cache = new ConcurrentHashMap<>();
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@Override
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public void postProcessMergedBeanDefinition(RootBeanDefinition beanDefinition,
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Class<?> beanType, String beanName) {
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if (checkSentinelProtect(beanDefinition, beanType)) {
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SentinelProtect sentinelProtect = ((StandardMethodMetadata) beanDefinition
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.getSource()).getIntrospectedMethod()
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.getAnnotation(SentinelProtect.class);
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cache.put(beanName, sentinelProtect);
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}
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}
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private boolean checkSentinelProtect(RootBeanDefinition beanDefinition,
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Class<?> beanType) {
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return beanType == RestTemplate.class
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&& beanDefinition.getSource() instanceof StandardMethodMetadata
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&& ((StandardMethodMetadata) beanDefinition.getSource())
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.isAnnotated(SentinelProtect.class.getName());
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}
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@Override
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public Object postProcessAfterInitialization(Object bean, String beanName)
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throws BeansException {
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if (cache.containsKey(beanName)) {
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// add interceptor for each RestTemplate with @SentinelProtect annotation
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StringBuilder interceptorBeanName = new StringBuilder();
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SentinelProtect sentinelProtect = cache.get(beanName);
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interceptorBeanName
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.append(StringUtils.uncapitalize(
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SentinelProtectInterceptor.class.getSimpleName()))
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.append("_")
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.append(sentinelProtect.blockHandlerClass().getSimpleName())
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.append(sentinelProtect.blockHandler()).append("_")
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.append(sentinelProtect.fallbackClass().getSimpleName())
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.append(sentinelProtect.fallback());
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RestTemplate restTemplate = (RestTemplate) bean;
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registerBean(interceptorBeanName.toString(), sentinelProtect);
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SentinelProtectInterceptor sentinelProtectInterceptor = applicationContext
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.getBean(interceptorBeanName.toString(),
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SentinelProtectInterceptor.class);
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restTemplate.getInterceptors().add(sentinelProtectInterceptor);
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}
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return bean;
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}
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private void registerBean(String interceptorBeanName,
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SentinelProtect sentinelProtect) {
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// register SentinelProtectInterceptor bean
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DefaultListableBeanFactory beanFactory = (DefaultListableBeanFactory) applicationContext
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.getAutowireCapableBeanFactory();
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BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder
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.genericBeanDefinition(SentinelProtectInterceptor.class);
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beanDefinitionBuilder.addConstructorArgValue(sentinelProtect);
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BeanDefinition interceptorBeanDefinition = beanDefinitionBuilder
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.getRawBeanDefinition();
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beanFactory.registerBeanDefinition(interceptorBeanName,
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interceptorBeanDefinition);
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}
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}
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@ -1,34 +0,0 @@
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/*
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* Copyright (C) 2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
|
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* you may not use this file except in compliance with the License.
|
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* You may obtain a copy of the License at
|
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*
|
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* http://www.apache.org/licenses/LICENSE-2.0
|
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*
|
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* Unless required by applicable law or agreed to in writing, software
|
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* distributed under the License is distributed on an "AS IS" BASIS,
|
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* 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.
|
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*/
|
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|
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package org.springframework.cloud.alibaba.sentinel.custom;
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import com.alibaba.csp.sentinel.slots.block.BlockException;
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|
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/**
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* Sentinel Block Handler
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* @author xiaojing
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*/
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public interface SentinelBlockHandler {
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/**
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* custom method to process BlockException
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* @param e block exception when blocked by sentinel
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* @return Object result processed by the handler
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*/
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Object handler(BlockException e);
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}
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@ -1,54 +0,0 @@
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/*
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* Copyright (C) 2018 the original author or authors.
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*
|
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* Licensed under the Apache License, Version 2.0 (the "License");
|
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* you may not use this file except in compliance with the License.
|
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* You may obtain a copy of the License at
|
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*
|
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* http://www.apache.org/licenses/LICENSE-2.0
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*
|
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* Unless required by applicable law or agreed to in writing, software
|
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* 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.
|
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*/
|
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package org.springframework.cloud.alibaba.sentinel.custom;
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import com.alibaba.csp.sentinel.Entry;
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/**
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* @author xiaojing
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*/
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public class SentinelEntry {
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private String key;
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private String handler;
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private Entry entry;
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public String getKey() {
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return key;
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}
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public void setKey(String key) {
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this.key = key;
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}
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public String getHandler() {
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return handler;
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}
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public void setHandler(String handler) {
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this.handler = handler;
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}
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public Entry getEntry() {
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return entry;
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}
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public void setEntry(Entry entry) {
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this.entry = entry;
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||||
}
|
||||
}
|
||||
@ -0,0 +1,139 @@
|
||||
/*
|
||||
* Copyright (C) 2018 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.springframework.cloud.alibaba.sentinel.custom;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.lang.reflect.Method;
|
||||
import java.net.URI;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
import org.springframework.cloud.alibaba.sentinel.annotation.SentinelProtect;
|
||||
import org.springframework.http.HttpRequest;
|
||||
import org.springframework.http.client.ClientHttpRequestExecution;
|
||||
import org.springframework.http.client.ClientHttpRequestInterceptor;
|
||||
import org.springframework.http.client.ClientHttpResponse;
|
||||
import org.springframework.util.ClassUtils;
|
||||
|
||||
import com.alibaba.csp.sentinel.Entry;
|
||||
import com.alibaba.csp.sentinel.SphU;
|
||||
import com.alibaba.csp.sentinel.context.ContextUtil;
|
||||
import com.alibaba.csp.sentinel.slots.block.BlockException;
|
||||
import com.alibaba.csp.sentinel.slots.block.degrade.DegradeException;
|
||||
import com.alibaba.csp.sentinel.util.StringUtil;
|
||||
|
||||
/**
|
||||
* Interceptor using by SentinelProtect and SentinelProtectInterceptor
|
||||
*
|
||||
* @author fangjian
|
||||
*/
|
||||
public class SentinelProtectInterceptor implements ClientHttpRequestInterceptor {
|
||||
|
||||
private static final Logger LOGGER = LoggerFactory
|
||||
.getLogger(SentinelProtectInterceptor.class);
|
||||
|
||||
private SentinelProtect sentinelProtect;
|
||||
|
||||
public SentinelProtectInterceptor(SentinelProtect sentinelProtect) {
|
||||
this.sentinelProtect = sentinelProtect;
|
||||
}
|
||||
|
||||
@Override
|
||||
public ClientHttpResponse intercept(HttpRequest request, byte[] body,
|
||||
ClientHttpRequestExecution execution) throws IOException {
|
||||
URI uri = request.getURI();
|
||||
String hostResource = uri.getScheme() + "://" + uri.getHost() + ":"
|
||||
+ (uri.getPort() == -1 ? 80 : uri.getPort());
|
||||
String hostWithPathResource = hostResource + uri.getPath();
|
||||
Entry hostEntry = null, hostWithPathEntry = null;
|
||||
ClientHttpResponse response = null;
|
||||
try {
|
||||
ContextUtil.enter(hostWithPathResource);
|
||||
hostWithPathEntry = SphU.entry(hostWithPathResource);
|
||||
hostEntry = SphU.entry(hostResource);
|
||||
response = execution.execute(request, body);
|
||||
}
|
||||
catch (BlockException e) {
|
||||
LOGGER.error("RestTemplate block", e);
|
||||
try {
|
||||
handleBlockException(e);
|
||||
}
|
||||
catch (Exception ex) {
|
||||
LOGGER.error("sentinel handle BlockException error.", e);
|
||||
}
|
||||
}
|
||||
finally {
|
||||
if (hostEntry != null) {
|
||||
hostEntry.exit();
|
||||
}
|
||||
if (hostWithPathEntry != null) {
|
||||
hostWithPathEntry.exit();
|
||||
}
|
||||
ContextUtil.exit();
|
||||
}
|
||||
return response;
|
||||
}
|
||||
|
||||
private void handleBlockException(BlockException ex) throws Exception {
|
||||
Object[] args = new Object[] { ex };
|
||||
// handle degrade
|
||||
if (isDegradeFailure(ex)) {
|
||||
Method method = extractFallbackMethod(sentinelProtect.fallback(),
|
||||
sentinelProtect.fallbackClass());
|
||||
if (method != null) {
|
||||
method.invoke(null, args);
|
||||
}
|
||||
}
|
||||
// handle block
|
||||
Method blockHandler = extractBlockHandlerMethod(sentinelProtect.blockHandler(),
|
||||
sentinelProtect.blockHandlerClass());
|
||||
if (blockHandler != null) {
|
||||
blockHandler.invoke(null, args);
|
||||
}
|
||||
}
|
||||
|
||||
private Method extractFallbackMethod(String fallback, Class<?> fallbackClass) {
|
||||
if (StringUtil.isBlank(fallback) || fallbackClass == void.class) {
|
||||
return null;
|
||||
}
|
||||
Method cachedMethod = BlockClassRegistry.lookupFallback(fallbackClass, fallback);
|
||||
if (cachedMethod == null) {
|
||||
cachedMethod = ClassUtils.getStaticMethod(fallbackClass, fallback,
|
||||
BlockException.class);
|
||||
BlockClassRegistry.updateFallbackFor(fallbackClass, fallback, cachedMethod);
|
||||
}
|
||||
return cachedMethod;
|
||||
}
|
||||
|
||||
private Method extractBlockHandlerMethod(String block, Class<?> blockClass) {
|
||||
if (StringUtil.isBlank(block) || blockClass == void.class) {
|
||||
return null;
|
||||
}
|
||||
Method cachedMethod = BlockClassRegistry.lookupBlockHandler(blockClass, block);
|
||||
if (cachedMethod == null) {
|
||||
cachedMethod = ClassUtils.getStaticMethod(blockClass, block,
|
||||
BlockException.class);
|
||||
BlockClassRegistry.updateBlockHandlerFor(blockClass, block, cachedMethod);
|
||||
}
|
||||
return cachedMethod;
|
||||
}
|
||||
|
||||
private boolean isDegradeFailure(BlockException ex) {
|
||||
return ex instanceof DegradeException;
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,4 +1,4 @@
|
||||
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
|
||||
org.springframework.cloud.alibaba.sentinel.SentinelWebAutoConfiguration,\
|
||||
org.springframework.cloud.alibaba.sentinel.endpoint.SentinelEndpointAutoConfiguration,\
|
||||
org.springframework.cloud.alibaba.sentinel.custom.SentinelCustomAspectAutoConfiguration
|
||||
org.springframework.cloud.alibaba.sentinel.custom.SentinelAutoConfiguration
|
||||
|
||||
Loading…
Reference in New Issue