提交代码

build.gradle

@@ -8,6 +8,7 @@ buildscript {
 	repositories {
 		maven { url "http://nexus.dui88.com:8081/nexus/content/groups/public/" }
 		maven { url 'http://maven.aliyun.com/nexus/content/groups/public/'}
+		maven { url "http://repo.spring.io/plugins-release" }
 		mavenCentral()
 		mavenLocal()
 	}
@@ -37,7 +38,7 @@ allprojects {
 	}
 
 	group = "cn.com.duiba.boot"
-	version = "0.0.2"
+	version = "0.0.10"
 }
 
 subprojects {
@@ -66,6 +67,10 @@ subprojects {
 				mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"
 			}
 
+			dependency("org.springframework.cloud:spring-cloud-starter-netflix-eureka-client:2.2.3.RELEASE")
+
+
+			dependency("org.springframework.boot:spring-boot-starter-web:${springBootVersion}")
 			dependency("org.apache.dubbo:dubbo-spring-boot-starter:2.7.4.1")
 
 			//工程第三方依赖
@@ -77,6 +82,7 @@ subprojects {
 
 			//升级算法版本
 			dependency("cn.com.duiba.nezha-alg:alg-model:2.23.43")
+			dependency('io.github.openfeign:feign-httpclient:10.10.1.dbfixed')
 
 		}
 	}
@@ -101,7 +107,7 @@ subprojects {
 				pom.project {
 					name project.name
 					packaging "jar"
-					description 'tuia-algo-ENGINE'
+					description 'spring-boot-starter-dsp'
 					url "www.duiba.com.cn"
 
 					scm {

settings.gradle

 rootProject.name = 'spring-boot-starter-dsp'
 include 'spring-boot-starter-dsp-model'
 include 'spring-boot-starter-dsp-sampler'
+include 'spring-boot-starter-dsp-warmup'
 

spring-boot-starter-dsp-sampler/src/main/java/cn/com/duiba/spring/boot/starter/dsp/sampler/CustomRequestInterceptor.java

@@ -4,7 +4,6 @@ import feign.RequestInterceptor;
 import feign.RequestTemplate;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Component;
-import java.util.Objects;
 
 @Slf4j
 @Component
@@ -12,15 +11,10 @@ public class CustomRequestInterceptor implements RequestInterceptor {
 
     @Override
     public void apply(RequestTemplate template) {
-
-        SamplerLogContext logSamplerTracer = SamplerLogThreadLocal.getContext().get();
-        if (Objects.isNull(logSamplerTracer) || Objects.isNull(logSamplerTracer.getPrintLogFlag())) {
+        if (!SamplerLog.infoFlag()) {
             return;
         }
-        if (logSamplerTracer.getPrintLogFlag()) {
-            template.header(SamplerLogConstant.RPC_SAMPLING_ID, logSamplerTracer.getSamplingId());
-        }
-        template.header(SamplerLogConstant.RPC_PRINT_LOG_FLAG, logSamplerTracer.getPrintLogFlag().toString());
+        template.header(SamplerLogConstant.RPC_SAMPLING_ID, SamplerLog.getSamplerId());
     }
 
 }

spring-boot-starter-dsp-sampler/src/main/java/cn/com/duiba/spring/boot/starter/dsp/sampler/DubboLogSamplerContextFilter.java

@@ -20,23 +20,20 @@ public class DubboLogSamplerContextFilter implements Filter {
         // 1、判断是消费者还是服务提供者
         if (isConsumerSide) {
             // 如果是消费者，将打印日志标识符set至上下文中
-            RpcContext.getContext().setAttachment(SamplerLogConstant.DUBBO_PRINT_LOG_FLAG, String.valueOf(SamplerLogThreadLocal.getContext().get().getPrintLogFlag()));
-            RpcContext.getContext().setAttachment(SamplerLogConstant.DUBBO_SAMPLING_ID, String.valueOf(SamplerLogThreadLocal.getContext().get().getSamplingId()));
+            RpcContext.getContext().setAttachment(SamplerLogConstant.DUBBO_SAMPLING_ID, SamplerLog.getSamplerId());
         } else {
             // 如果是服务提供者，从上下文取出
-            String traceContext = RpcContext.getContext().getAttachment(SamplerLogConstant.DUBBO_PRINT_LOG_FLAG);
-            String traceId = RpcContext.getContext().getAttachment(SamplerLogConstant.DUBBO_SAMPLING_ID);
-            SamplerLogThreadLocal.set(Objects.equals("true", traceContext), traceId);
+            String samplingId = RpcContext.getContext().getAttachment(SamplerLogConstant.DUBBO_SAMPLING_ID);
+            SamplerLog.setSamplerId(samplingId);
         }
 
         try {
             return invoker.invoke(invocation);
-        } catch (Exception e) {
-            if (!(e instanceof RpcException)) {
-                log.warn("DubboLogSamplerContextFilter invoke warn", e);
+        } finally {
+            if (!isConsumerSide){
+                SamplerLog.end();
             }
         }
-        return null;
 
     }
 

spring-boot-starter-dsp-sampler/src/main/java/cn/com/duiba/spring/boot/starter/dsp/sampler/DuibaRpcContextParamsInterceptor.java

@@ -9,7 +9,6 @@ import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.springframework.cloud.openfeign.FeignClient;
-import java.util.Objects;
 
 @Slf4j
 @Configuration
@@ -19,12 +18,12 @@ public class DuibaRpcContextParamsInterceptor extends HandlerInterceptorAdapter
 
     @Override
     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
-        String printLogFlag = request.getHeader(SamplerLogConstant.RPC_PRINT_LOG_FLAG);
-        String adxTraceId = request.getHeader(SamplerLogConstant.RPC_SAMPLING_ID);
-        if (StringUtils.isBlank(printLogFlag)) {
+        String samplingId = request.getHeader(SamplerLogConstant.RPC_SAMPLING_ID);
+        if (StringUtils.isBlank(samplingId)) {
             return true;
         }
-        SamplerLogThreadLocal.set(Objects.equals("true", printLogFlag), adxTraceId);
+
+        SamplerLog.setSamplerId(samplingId);
         return true;
     }
 }

spring-boot-starter-dsp-sampler/src/main/java/cn/com/duiba/spring/boot/starter/dsp/sampler/SamplerLog.java

@@ -4,32 +4,48 @@ import com.alibaba.ttl.TransmittableThreadLocal;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import java.util.Objects;
+import java.util.Random;
+import java.util.UUID;
 
 public class SamplerLog {
 
     private static final Logger logger = LoggerFactory.getLogger(SamplerLog.class);
 
-    public static void startSampling(Integer samplingRate){
-        SamplerLogThreadLocal.setSamplingRate(samplingRate);
-    }
+    private static final TransmittableThreadLocal<String> LOCAL = new TransmittableThreadLocal<>();
 
-    public static boolean infoFlag() {
-        TransmittableThreadLocal<SamplerLogContext> threadLocal = SamplerLogThreadLocal.getContext();
+    private static final Random random = new Random();
 
-        if (Objects.isNull(threadLocal) || Objects.isNull(threadLocal.get()) || Objects.isNull(threadLocal.get().getPrintLogFlag())) {
-            return false;
+    public static void start(Integer samplingRate){
+        if (random.nextInt(samplingRate) != 0) {
+            return;
         }
+        LOCAL.set(UUID.randomUUID().toString());
+    }
 
-        return threadLocal.get().getPrintLogFlag();
+    public static void end(){
+        LOCAL.remove();
     }
 
-    public static void info(String format, Object... arguments) {
-        if (infoFlag()) {
-            logger.info("samplingId-" + SamplerLogThreadLocal.getContext().get().getSamplingId() + "，" + format, arguments);
-        }
+    public static String getSamplerId(){
+        return LOCAL.get();
     }
 
+    public static void setSamplerId(String samplerId) {
+        LOCAL.set(samplerId);
+    }
 
+    public static boolean infoFlag() {
+        return Objects.nonNull(LOCAL.get());
+    }
 
+    public static void info(String format, Object... arguments) {
+        try {
+            if (infoFlag()) {
+                logger.info("samplingId-" + LOCAL.get() + "," + format, arguments);
+            }
+        } catch (Exception e) {
+            logger.warn("SamplerLog info error", e);
+        }
+    }
 
 }

spring-boot-starter-dsp-sampler/src/main/java/cn/com/duiba/spring/boot/starter/dsp/sampler/SamplerLogConstant.java

@@ -2,10 +2,6 @@ package cn.com.duiba.spring.boot.starter.dsp.sampler;
 
 public class SamplerLogConstant {
 
-    public static String RPC_PRINT_LOG_FLAG = "rpcPrintLogFlag";
-
-    public static String DUBBO_PRINT_LOG_FLAG = "dubboPrintLogFlag";
-
     public static String RPC_SAMPLING_ID = "rpcSamplingId";
 
     public static String DUBBO_SAMPLING_ID = "dubboSamplingId";

spring-boot-starter-dsp-sampler/src/main/java/cn/com/duiba/spring/boot/starter/dsp/sampler/SamplerLogContext.java

-package cn.com.duiba.spring.boot.starter.dsp.sampler;
-
-import lombok.Data;
-
-@Data
-public class SamplerLogContext {
-
-    /**
-     * 日志采样标识符，是否需要打印日志
-     * true：打印日志；false：不打印日志
-     */
-    private Boolean printLogFlag;
-
-    /**
-     * 日志采样id
-     */
-    private String samplingId;
-
-}

spring-boot-starter-dsp-sampler/src/main/java/cn/com/duiba/spring/boot/starter/dsp/sampler/SamplerLogThreadLocal.java

-package cn.com.duiba.spring.boot.starter.dsp.sampler;
-
-import com.alibaba.ttl.TransmittableThreadLocal;
-import java.util.Objects;
-import java.util.Random;
-import java.util.UUID;
-
-public class SamplerLogThreadLocal {
-
-    private static final Random random = new Random();
-
-    private static final TransmittableThreadLocal<SamplerLogContext> logSamplerTracerThreadLocal = new TransmittableThreadLocal<>();
-
-    static TransmittableThreadLocal<SamplerLogContext> getContext() {
-        return logSamplerTracerThreadLocal;
-    }
-
-    static void setSamplingRate(Integer samplingRate) {
-        if (Objects.isNull(samplingRate)) {
-            set(false, null);
-            return;
-        }
-
-        if (random.nextInt(samplingRate) == 0) {
-            set(true, UUID.randomUUID().toString());
-            return;
-        }
-        set(false, null);
-    }
-
-    static void set(boolean isPrint, String samplingId) {
-        SamplerLogContext logSamplerContext = new SamplerLogContext();
-        logSamplerContext.setPrintLogFlag(isPrint);
-        logSamplerContext.setSamplingId(samplingId);
-        logSamplerTracerThreadLocal.set(logSamplerContext);
-    }
-
-}

spring-boot-starter-dsp-warmup/build.gradle

+dependencies {
+
+    provided "cn.com.duiba:wolf"
+    provided "cn.com.duiba.boot:spring-boot-ext-api"
+    provided "org.springframework:spring-web"
+
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+
+    compileOnly 'org.projectlombok:lombok'
+    annotationProcessor 'org.projectlombok:lombok'
+
+    testCompileOnly 'org.projectlombok:lombok'
+    testAnnotationProcessor 'org.projectlombok:lombok'
+
+    compile "org.springframework.cloud:spring-cloud-starter-openfeign"
+    compile 'org.springframework.boot:spring-boot-autoconfigure'
+    compile "org.apache.commons:commons-lang3"
+    compile "org.springframework.boot:spring-boot-starter-cache"
+
+    compile 'io.github.openfeign:feign-httpclient'
+    compile "org.springframework.boot:spring-boot-starter-web"
+    compile "org.springframework.cloud:spring-cloud-starter-netflix-eureka-client"
+
+
+
+}
\ No newline at end of file

spring-boot-starter-dsp-warmup/src/main/java/cn/com/duiba/spring/boot/starter/dsp/warmup/CacheConfig.java

+package cn.com.duiba.spring.boot.starter.dsp.warmup;
+
+import cn.com.duiba.boot.event.MainContextRefreshedEvent;
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONObject;
+import com.alibaba.fastjson.serializer.SerializerFeature;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.type.MapType;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+import com.github.benmanes.caffeine.cache.AsyncCache;
+import com.netflix.appinfo.InstanceInfo;
+import com.netflix.discovery.EurekaClient;
+import org.apache.commons.collections.CollectionUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.AutoConfigureOrder;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.event.EventListener;
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
+import javax.annotation.Resource;
+import java.lang.reflect.Field;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.*;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentMap;
+import java.util.stream.Collectors;
+
+/**
+ * @author MeiChang
+ * @Description
+ */
+@Configuration
+@AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
+public class CacheConfig {
+    private static final Logger logger = LoggerFactory.getLogger(CacheConfig.class);
+
+    @Autowired
+    private ConfigurableApplicationContext applicationContext;
+
+    @Resource(name = "eurekaClient")
+    private EurekaClient eurekaClient;
+
+    @Value("spring.application.name")
+    private String appName;
+
+    /**
+     * 本地缓存预热开关：默认关闭
+     */
+    @Value("${local.cache.warmup.enable:false}")
+    private Boolean cacheEnable;
+
+    @EventListener(MainContextRefreshedEvent.class)
+    public void onMainContextRefreshed(){
+        String[] names = applicationContext.getBeanDefinitionNames();
+        for (String beanName : names) {
+            try {
+                Object bean = applicationContext.getBean(beanName);
+                Class<?> beanObjClass = bean.getClass();
+                Package pkg = beanObjClass.getPackage();
+                if (pkg == null) {
+                    continue;
+                }
+                String packageName = pkg.getName();
+                if (packageName.startsWith("springfox.") || packageName.startsWith("org.")
+                        || packageName.startsWith("io.") || packageName.startsWith("net.")
+                        || packageName.startsWith("cn.com.duibaboot") || packageName.startsWith("com.netflix")) {
+                    continue;
+                }
+                Field[] fields = bean.getClass().getDeclaredFields();
+                if (fields.length == 0) {
+                    continue;
+                }
+
+                for (Field field : fields) {
+                    boolean isCaffeine = AsyncCache.class.isAssignableFrom(field.getType());
+
+                    if (!isCaffeine) {
+                        continue;
+                    }
+                    field.setAccessible(true);
+                    String keyName = String.format("%s-%s", beanName, field.getName());
+                    try {
+                        Object cache = field.get(bean);
+
+                        if (!(cache instanceof AsyncCache)) {
+                            continue;
+                        }
+                        ConcurrentMap<Object, Object> concurrentMap = ((AsyncCache) cache).synchronous().asMap();
+                        CacheManager.saveCache(keyName, concurrentMap);
+                        logger.info("beanName = {}, cache = {}, isCaffeine = {}, bean = {}", keyName, cache, isCaffeine, bean);
+                    } catch (IllegalAccessException e) {
+                        //ignore
+                    } finally {
+                        field.setAccessible(false);
+                    }
+                }
+            }catch(Exception e){
+                logger.warn("", e);
+            }
+        }
+    }
+
+    // 顺序最靠后 等其他地方处理MainContextRefreshedEvent事件完成后
+    @EventListener(MainContextRefreshedEvent.class)
+    @Order(Ordered.LOWEST_PRECEDENCE-1)
+    public void onServerCache(){
+        try{
+            // 本地缓存预热开关 : 默认关闭
+            if (!cacheEnable) {
+                logger.warn("Cache preheating failed，because cacheEnable is false");
+                return;
+            }
+            List<InstanceInfo> instances = eurekaClient.getApplication(appName).getInstances();
+            logger.info("container of all registered AppInfo : {}",instances);
+            List<InstanceInfo> list = instances.stream().sorted(Comparator.comparing(InstanceInfo::getLastUpdatedTimestamp).reversed()).collect(Collectors.toList());
+            logger.info("container of all registered AppInfo : {}",list);
+            if (CollectionUtils.isEmpty(list)) {
+                logger.warn("Cache preheating failed，because 服务启动获取【" + appName + "】列表信息为空");
+                return;
+            }
+            String result = HttpRequestUtils.sendHttp(list.get(0).getHomePageUrl() + "/local/getCacheMap", null, appName);
+            if (StringUtils.isBlank(result)) {
+                logger.warn("Cache preheating failed，because request {} ,response {}", list.get(0).getHomePageUrl() + "/local/getCacheMap", result);
+                return;
+            }
+
+            ObjectMapper objectMapper = new ObjectMapper();
+            TypeFactory typeFactory = objectMapper.getTypeFactory();
+            Map<String, Object> map = objectMapper.convertValue(JSONObject.parse(result), typeFactory.constructMapType(Map.class, String.class, Object.class));
+            map.forEach((k, v) -> {
+                // beanName----cacheFieldName
+                String[] split = k.split("-");
+                Object bean = applicationContext.getBean(split[0]);
+                Field[] fields = bean.getClass().getDeclaredFields();
+                for (Field field : fields) {
+                    if (field.getName().equals(split[1]) && ((JSONObject) JSONObject.parse(JSON.toJSONString(v))).size() > 0) {
+                        try {
+                            field.setAccessible(true);
+                            Object obj = field.get(bean);
+
+                            if (!(obj instanceof AsyncCache)) {
+                                continue;
+                            }
+
+                            AsyncCache asyncCache = (AsyncCache) obj;
+
+                            // 通过MapType解析map结构
+                            ParameterizedType genericType = (ParameterizedType) field.getGenericType();
+                            Type[] actualTypeArguments = genericType.getActualTypeArguments();
+                            MapType mapType = typeFactory.constructMapType(Map.class, (Class<?>) actualTypeArguments[0], Object.class);
+                            objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+                            Map convertMap = objectMapper.convertValue(v, mapType);
+
+                            convertMap.forEach((k1, v1) -> {
+                                // 通过JavaType解析map中的value结构
+                                ParameterizedType genericType1 = (ParameterizedType) actualTypeArguments[1];
+                                Type[] actualTypeArguments1 = genericType1.getActualTypeArguments();
+                                JavaType javaType = typeFactory.constructType(actualTypeArguments1[0]);
+                                asyncCache.put(k1, CompletableFuture.supplyAsync(() -> Optional.ofNullable(objectMapper.convertValue(v1, javaType))));
+                            });
+
+                            logger.info("Caffeine Cache key = {} ; Caffeine Cache Size = {}", k, asyncCache.synchronous().asMap().size());
+                            field.setAccessible(false);
+                        } catch (Exception e) {
+                            logger.warn("this bean : {} , no have method : {}, Lead to it cannot be deserialized , cause: {}", split[0], field.getName() + "Serialize", e);
+                        }
+                    }
+                }
+            });
+            logger.info(JSON.toJSONString(map, SerializerFeature.PrettyFormat,SerializerFeature.WriteMapNullValue,SerializerFeature.WriteDateUseDateFormat));
+        } catch (Exception e) {
+            logger.warn("服务启动获取【" + appName +"】列表信息失败", e);
+        }
+
+    }
+
+
+}

spring-boot-starter-dsp-warmup/src/main/java/cn/com/duiba/spring/boot/starter/dsp/warmup/CacheEndpoint.java

+package cn.com.duiba.spring.boot.starter.dsp.warmup;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import java.util.concurrent.ConcurrentMap;
+
+/**
+ * @author MeiChang
+ * @Description
+ */
+
+@Slf4j
+@RestController
+public class CacheEndpoint {
+
+    @RequestMapping("/local/getCacheMap")
+    public ConcurrentMap<String, Object> getCacheMap(){
+        return CacheManager.getCacheMap();
+    }
+}

spring-boot-starter-dsp-warmup/src/main/java/cn/com/duiba/spring/boot/starter/dsp/warmup/CacheManager.java

+package cn.com.duiba.spring.boot.starter.dsp.warmup;
+
+import com.google.common.collect.Maps;
+import org.apache.commons.lang3.StringUtils;
+import java.util.concurrent.ConcurrentMap;
+
+/** Cache对象管理器
+ * @author MeiChang
+ * @Description
+ */
+public class CacheManager {
+
+    /**
+     * 使用单例保存所有Cache对象
+     */
+    private static final ConcurrentMap<String, Object> allCacheMap = Maps.newConcurrentMap();
+
+
+    static void saveCache(String key, Object value) {
+
+        if (StringUtils.isBlank(key)) {
+            return;
+        }
+
+        allCacheMap.put(key, value);
+    }
+
+    public static ConcurrentMap<String, Object> getCacheMap(){
+        return allCacheMap;
+    }
+}

spring-boot-starter-dsp-warmup/src/main/java/cn/com/duiba/spring/boot/starter/dsp/warmup/HttpRequestUtils.java

+package cn.com.duiba.spring.boot.starter.dsp.warmup;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.serializer.SerializerFeature;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.utils.URIBuilder;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy;
+import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.protocol.HttpContext;
+import org.apache.http.util.EntityUtils;
+import java.io.IOException;
+import java.net.URI;
+import java.util.Map;
+
+@Slf4j
+public class HttpRequestUtils {
+
+    /**
+     * 发送get请求
+     * @param url
+     * @param param
+     * @return
+     */
+    public static String sendHttp(String url , Map<String, String> param, String appName){
+        CloseableHttpClient httpClient = HttpClientBuilder.create()
+                .setDefaultRequestConfig(RequestConfig.custom().setConnectTimeout(150).setSocketTimeout(150).setConnectionRequestTimeout(100).build())
+                .setMaxConnPerRoute(1)
+                .setMaxConnTotal(1000)
+                .evictExpiredConnections()//开启后台线程定时清理失效的连接，每隔10秒主动扫描并逐出超时的连接（超过keepAliveTimeout）
+                .setUserAgent(appName)
+                .setRetryHandler(new DefaultHttpRequestRetryHandler())  // 默认开启重试机制，重试3次
+                .disableCookieManagement()
+                .useSystemProperties()//for proxy
+                .disableRedirectHandling()
+                .setKeepAliveStrategy(new DefaultConnectionKeepAliveStrategy(){
+                    @Override
+                    public long getKeepAliveDuration(HttpResponse response, HttpContext context) {
+                        long time = super.getKeepAliveDuration(response, context);
+                        if(time == -1){
+                            time = 30000;//链接最多空闲30秒
+                        }
+                        return time;
+                    }
+                })
+                .build();
+        String resultString = "";
+        CloseableHttpResponse response = null;
+        try {
+            // 创建uri
+            URIBuilder builder = new URIBuilder(url);
+            if (param != null) {
+                for (String key : param.keySet()) {
+                    builder.addParameter(key, param.get(key));
+                }
+            }
+            URI uri = builder.build();
+
+            // 创建http GET请求
+            HttpGet httpGet = new HttpGet(uri);
+
+            // 执行请求
+            response = httpClient.execute(httpGet);
+            // 判断返回状态是否为200
+            if (response.getStatusLine().getStatusCode() == 200) {
+                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
+            }else {
+                log.warn("Cache preheating failed，because response {}", JSON.toJSONString(response, SerializerFeature.PrettyFormat));
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                if (response != null) {
+                    response.close();
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return resultString;
+    }
+
+
+}