ubuntu安装Memcached

1、选择较新的版本安装

访问官网：memcached - a distributed memory object caching system

我使用的是Memcached 1.6.22这个版本ReleaseNotes1622 · memcached/memcached Wiki · GitHub

下载地址：http://www.memcached.org/files/memcached-1.6.22.tar.gz

下载后，解压，然后到目录下执行安装命令：

./configure --prefix=/home/lighthouse/memcached && make && make test && sudo make install

发现这种安装方式无厘头，搞不懂安装到哪去了，无法执行./memcached命令，那换一种方式吧。

更新包管理器的索引：

sudo apt-update

安装Memcached：

sudo apt-get install memcached

验证Memcached版本：

memcached -h | grep 'memcached'

启动Memcached服务：

sudo service memcached start

设置Memcached在启动时自动运行：

sudo systemctl enable memcached

使用Memcached。你可以使用memcached客户端来与Memcached服务交互。例如，使用telnet连接到Memcached服务：

telnet localhost 11211

在telnet会话中，你可以使用Memcached命令存储和检索数据。例如：

set key1 0 60 5

value

STORED

get key1

VALUE key1 0 5

value

END

2、在java中使用memcached

2.1引入jar包

<dependency><groupId>com.googlecode.xmemcached</groupId><artifactId>xmemcached</artifactId><version>2.4.7</version></dependency>

2.2写个测试接口

package com.hmblogs.backend.controller;import lombok.extern.slf4j.Slf4j;
import net.rubyeye.xmemcached.MemcachedClient;
import net.rubyeye.xmemcached.MemcachedClientBuilder;
import net.rubyeye.xmemcached.XMemcachedClientBuilder;
import net.rubyeye.xmemcached.utils.AddrUtil;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.io.IOException;@RestController
@RequestMapping("/memcached")
@Slf4j
public class MemcachedController {@GetMapping("/test")public String hello() {MemcachedClient memcachedClient = null;try {MemcachedClientBuilder builder = new XMemcachedClientBuilder(AddrUtil.getAddresses("43.138.0.199:11211"));log.info("aaaa");memcachedClient = builder.build();log.info("bbbb");// 存储数据memcachedClient.set("key1", 0, "value1");log.info("cccc");// 检索数据String value1 = memcachedClient.get("key1");log.info("dddd");return "key1: " + value1;} catch (Exception e) {log.info("error:{}",e);} finally {log.info("eeeee");if (memcachedClient != null) {try {memcachedClient.shutdown();} catch (IOException e) {log.info("shutdown error:{}",e);}}}return "ok";}
}

2.3验证该接口

2024-04-10 17:42:37.446 [http-nio-8081-exec-1] INFO  [com.hmblogs.backend.controller.MemcachedController] - aaaa
2024-04-10 17:42:37.462 [http-nio-8081-exec-1] INFO  [net.rubyeye.xmemcached.XMemcachedClient] - XMemcachedClient is using Text protocol
2024-04-10 17:42:37.504 [http-nio-8081-exec-1] INFO  [com.google.code.yanf4j.nio.impl.SelectorManager] - Creating 2 reactors...
2024-04-10 17:42:37.511 [http-nio-8081-exec-1] INFO  [c.google.code.yanf4j.core.impl.AbstractController] - The Controller started at localhost/127.0.0.1:0 ...
2024-04-10 17:42:37.525 [http-nio-8081-exec-1] INFO  [com.hmblogs.backend.controller.MemcachedController] - bbbb
2024-04-10 17:42:37.529 [http-nio-8081-exec-1] INFO  [com.hmblogs.backend.controller.MemcachedController] - error:{}
net.rubyeye.xmemcached.exception.MemcachedException: There is no available connection at this momentat net.rubyeye.xmemcached.impl.MemcachedConnector.send(MemcachedConnector.java:493)at net.rubyeye.xmemcached.XMemcachedClient.sendCommand(XMemcachedClient.java:325)at net.rubyeye.xmemcached.XMemcachedClient.sendStoreCommand(XMemcachedClient.java:2380)at net.rubyeye.xmemcached.XMemcachedClient.set(XMemcachedClient.java:1285)at net.rubyeye.xmemcached.XMemcachedClient.set(XMemcachedClient.java:1339)at net.rubyeye.xmemcached.XMemcachedClient.set(XMemcachedClient.java:1328)at com.hmblogs.backend.controller.MemcachedController.hello(MemcachedController.java:29)at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.base/java.lang.reflect.Method.invoke(Method.java:566)at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)at javax.servlet.http.HttpServlet.service(HttpServlet.java:655)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735)at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.base/java.lang.Thread.run(Thread.java:829)
2024-04-10 17:42:37.529 [http-nio-8081-exec-1] INFO  [com.hmblogs.backend.controller.MemcachedController] - eeeee
2024-04-10 17:42:37.530 [http-nio-8081-exec-1] INFO  [c.google.code.yanf4j.core.impl.AbstractController] - Controller has been stopped.