import changes from master

reorganizing modules

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/ExceptionUtil.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2013-2018 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
+ *
+ *      https://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 com.alibaba.cloud.examples;
 
 import com.alibaba.cloud.sentinel.rest.SentinelClientHttpResponse;
@@ -9,7 +25,11 @@ import org.springframework.http.client.ClientHttpRequestExecution;
 /**
  * @author fangjian
  */
-public class ExceptionUtil {
+public final class ExceptionUtil {
+
+	private ExceptionUtil() {
+
+	}
 
 	public static SentinelClientHttpResponse handleException(HttpRequest request,
 			byte[] body, ClientHttpRequestExecution execution, BlockException ex) {

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/JsonFlowRuleListConverter.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2013-2018 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
+ *
+ *      https://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 com.alibaba.cloud.examples;
 
 import java.util.List;
@@ -11,9 +27,11 @@ import com.alibaba.fastjson.TypeReference;
  * @author fangjian
  */
 public class JsonFlowRuleListConverter implements Converter<String, List<FlowRule>> {
+
 	@Override
 	public List<FlowRule> convert(String source) {
 		return JSON.parseObject(source, new TypeReference<List<FlowRule>>() {
 		});
 	}
+
 }

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/ServiceApplication.java

@@ -1,10 +1,33 @@
+/*
+ * Copyright 2013-2018 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
+ *
+ *      https://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 com.alibaba.cloud.examples;
 
+import java.util.Collections;
+
+import com.alibaba.cloud.circuitbreaker.sentinel.SentinelCircuitBreakerFactory;
+import com.alibaba.cloud.circuitbreaker.sentinel.SentinelConfigBuilder;
 import com.alibaba.cloud.sentinel.annotation.SentinelRestTemplate;
 import com.alibaba.csp.sentinel.datasource.Converter;
+import com.alibaba.csp.sentinel.slots.block.RuleConstant;
+import com.alibaba.csp.sentinel.slots.block.degrade.DegradeRule;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.circuitbreaker.Customizer;
 import org.springframework.context.annotation.Bean;
 import org.springframework.web.client.RestTemplate;
 
@@ -15,7 +38,8 @@ import org.springframework.web.client.RestTemplate;
 public class ServiceApplication {
 
 	@Bean
-	@SentinelRestTemplate(blockHandler = "handleException", blockHandlerClass = ExceptionUtil.class)
+	@SentinelRestTemplate(blockHandler = "handleException",
+			blockHandlerClass = ExceptionUtil.class)
 	public RestTemplate restTemplate() {
 		return new RestTemplate();
 	}
@@ -30,6 +54,18 @@ public class ServiceApplication {
 		return new JsonFlowRuleListConverter();
 	}
 
+	@Bean
+	public Customizer<SentinelCircuitBreakerFactory> defaultConfig() {
+		return factory -> {
+			factory.configureDefault(
+					id -> new SentinelConfigBuilder().resourceName(id)
+							.rules(Collections.singletonList(new DegradeRule(id)
+									.setGrade(RuleConstant.DEGRADE_GRADE_RT).setCount(100)
+									.setTimeWindow(10)))
+							.build());
+		};
+	}
+
 	public static void main(String[] args) {
 		SpringApplication.run(ServiceApplication.class, args);
 	}

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/TestController.java

@@ -1,10 +1,26 @@
+/*
+ * Copyright 2013-2018 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
+ *
+ *      https://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 com.alibaba.cloud.examples;
 
 import com.alibaba.csp.sentinel.annotation.SentinelResource;
 
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.client.RestTemplate;
 
@@ -17,26 +33,42 @@ public class TestController {
 	@Autowired
 	private RestTemplate restTemplate;
 
-	@RequestMapping(value = "/hello", method = RequestMethod.GET)
+	@Autowired
+	private CircuitBreakerFactory circuitBreakerFactory;
+
+	@GetMapping("/hello")
 	@SentinelResource("resource")
 	public String hello() {
 		return "Hello";
 	}
 
-	@RequestMapping(value = "/aa", method = RequestMethod.GET)
+	@GetMapping("/aa")
 	@SentinelResource("aa")
 	public String aa(int b, int a) {
 		return "Hello test";
 	}
 
-	@RequestMapping(value = "/test", method = RequestMethod.GET)
+	@GetMapping("/test")
 	public String test1() {
 		return "Hello test";
 	}
 
-	@RequestMapping(value = "/template", method = RequestMethod.GET)
+	@GetMapping("/template")
 	public String client() {
 		return restTemplate.getForObject("http://www.taobao.com/test", String.class);
 	}
 
+	@GetMapping("/slow")
+	public String slow() {
+		return circuitBreakerFactory.create("slow").run(() -> {
+			try {
+				Thread.sleep(500L);
+			}
+			catch (InterruptedException e) {
+				e.printStackTrace();
+			}
+			return "slow";
+		}, throwable -> "fallback");
+	}
+
 }

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/WebMvcConfiguration.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2013-2018 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
+ *
+ *      https://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 com.alibaba.cloud.examples;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+/**
+ * @author yuhuangbin
+ */
+@Configuration
+@EnableWebMvc
+public class WebMvcConfiguration implements WebMvcConfigurer {
+
+	@Override
+	public void addViewControllers(ViewControllerRegistry registry) {
+		registry.addViewController("/errorPage").setViewName("errorPage");
+	}
+
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/resources/application.properties

@@ -1,8 +1,17 @@
 spring.application.name=sentinel-example
 server.port=18083
 management.endpoints.web.exposure.include=*
+management.endpoint.health.show-details=always
+
+# we can disable health check, default is enable
+management.health.diskspace.enabled=false
+# management.health.sentinel.enabled=false
+
 spring.cloud.sentinel.transport.dashboard=localhost:8080
 spring.cloud.sentinel.eager=true
+
+#spring.cloud.sentinel.block-page=/errorPage
+#spring.cloud.sentinel.filter.enabled=false
 #spring.cloud.sentinel.http-method-specify=false
 
 spring.cloud.sentinel.datasource.ds1.file.file=classpath: flowrule.json
@@ -20,7 +29,4 @@ spring.cloud.sentinel.datasource.ds4.file.file=classpath: system.json
 spring.cloud.sentinel.datasource.ds4.file.rule-type=system
 
 spring.cloud.sentinel.datasource.ds5.file.file=classpath: param-flow.json
-spring.cloud.sentinel.datasource.ds5.file.rule-type=param-flow
-
-
-management.endpoint.health.show-details=always
+spring.cloud.sentinel.datasource.ds5.file.rule-type=param_flow

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/resources/templates/errorPage.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+This is error page.
+</body>
+</html>