nacos | use dynamic service discovery , configuration and service | Microservice library

by alibaba Java Version: 2.2.1 License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | nacos Summary

nacos is a Java library typically used in Architecture, Microservice applications. nacos has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has medium support. You can download it from GitHub, Maven.

an easy-to-use dynamic service discovery, configuration and service management platform for building cloud native applications.

Support

Quality

Security

License

Reuse

Support

Quality

Security

License

Reuse

Support

nacos has a medium active ecosystem.

It has 25856 star(s) with 11489 fork(s). There are 907 watchers for this library.

There were 7 major release(s) in the last 6 months.

There are 227 open issues and 6615 have been closed. On average issues are closed in 5 days. There are 12 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of nacos is 2.2.1

nacos Support

Best in #Microservice

Average in #Microservice

nacos Support

Best in #Microservice

Average in #Microservice

Quality

nacos has 0 bugs and 0 code smells.

nacos Quality

Best in #Microservice

Average in #Microservice

nacos Quality

Best in #Microservice

Average in #Microservice

Security

nacos has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

nacos code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

nacos Security

Best in #Microservice

Average in #Microservice

nacos Security

Best in #Microservice

Average in #Microservice

License

nacos is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

nacos License

Best in #Microservice

Average in #Microservice

nacos License

Best in #Microservice

Average in #Microservice

Reuse

nacos releases are available to install and integrate.

Deployable package is available in Maven.

Build file is available. You can build the component from source.

Installation instructions, examples and code snippets are available.

nacos saves you 92978 person hours of effort in developing the same functionality from scratch.

It has 103434 lines of code, 8355 functions and 1129 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

nacos Reuse

Best in #Microservice

Average in #Microservice

nacos Reuse

Best in #Microservice

Average in #Microservice

Top functions reviewed by kandi - BETA

kandi has reviewed nacos and discovered the below as its top functions. This is intended to give you an instant insight into nacos implemented functionality, and help decide if they suit your requirements.

Compares two arrays .

Receive a heartbeat from the master .

Get the config .

Gets the context .

Binary stream observer for request .

Loads the credential .

Attempt to match a pattern

apply rule .

Return a page of config info

Perform reconnect .

Get all kandi verified functions for this library.

nacos Key Features

an easy-to-use dynamic service discovery, configuration and service management platform for building cloud native applications.

nacos Examples and Code Snippets

No Code Snippets are available at this moment for nacos.

Community Discussions

Trending Discussions on nacos

How to extract kubernetes pod command execution result attributes

How can i change heap size when i use docker-compose and dockerfile to create a javaproject?

Error creating bean with name 'projectController': Unsatisfied dependency expressed through field 'service';

How to find which pom item introduces a specific external dependency?

Trending Discussions on nacos

How to extract kubernetes pod command execution result attributes

How can i change heap size when i use docker-compose and dockerfile to create a javaproject?

Error creating bean with name 'projectController': Unsatisfied dependency expressed through field 'service';

How to find which pom item introduces a specific external dependency?

QUESTION

How to extract kubernetes pod command execution result attributes

Asked 2022-Mar-03 at 16:00

I am connecting to pod via client-Go and I want to get the properties of the file directory

func GetPodFiles(c *gin.Context)  {
    client, _ := Init.ClusterID(c)
    path := c.DefaultQuery("path", "/")
    cmd := []string{
        "sh",
        "-c",
        fmt.Sprintf("ls -l %s", path),
    }
    config, _ := Init.ClusterCfg(c)
    req := client.CoreV1().RESTClient().Post().
        Resource("pods").
        Name("nacos-0").
        Namespace("default").SubResource("exec").Param("container", "nacos")
    req.VersionedParams(
        &v1.PodExecOptions{
            Command: cmd,
            Stdin:   false,
            Stdout:  true,
            Stderr:  true,
            TTY:     false,
        },
        scheme.ParameterCodec,
    )

    var stdout, stderr bytes.Buffer
    exec, err := remotecommand.NewSPDYExecutor(config, "POST", req.URL())
    if err != nil {
        response.FailWithMessage(response.InternalServerError, err.Error(), c)
        return
    }
    err = exec.Stream(remotecommand.StreamOptions{
        Stdin:  nil,
        Stdout: &stdout,
        Stderr: &stderr,
    })
    if err != nil {
        response.FailWithMessage(response.InternalServerError, "Error obtaining file", c)
        return
    }

    fmt.Println(stdout.String())
}

Execution Result Output

total 0
lrwxrwxrwx   1 root root   7 Jun  1  2018 bin -> usr/bin
drwxr-xr-x   5 root root 360 Feb 16 16:39 dev
lrwxrwxrwx   1 root root   8 Jun  1  2018 sbin -> usr/sbin
drwxr-xr-x   2 root root   6 Apr 11  2018 srv

Expect the result

"data": [
        {
            "perm": "drwxr-xr-x",
            "mod_time": "2022-03-02 15:02:15",
            "kind": "d",
            "name": "temp",
            "size": ""
        },
]

Is there a good way or a golang third-party library to handle it. Please let me know. Thank you

ANSWER

Answered 2022-Mar-03 at 16:00

In a Kubernetes pod you can execute the stat linux command instead of ls command.

$ stat yourFileOrDirName

The output of this command by default is like this:

  File: yourFileOrDirName
  Size: 346             Blocks: 0          IO Block: 4096   directory
Device: 51h/82d Inode: 40431       Links: 1
Access: (0755/drwxr-xr-x)  Uid: ( 1000/ username)   Gid: ( 1000/ groupname)
Access: 2022-03-02 11:59:07.384821351 +0100
Modify: 2022-03-02 11:58:48.733821177 +0100
Change: 2022-03-02 11:58:48.733821177 +0100
 Birth: 2021-12-21 11:12:05.571841723 +0100

But you can tweak its output like this:

$ stat --printf="%n,%A,%y,%s" yourFileOrDirName

where %n - file name, %A - permission bits and file type in human readable form, %y - time of last data modification human-readable, %s - total size, in bytes. You can also choose any character as a delimiter instead of comma.

the output will be:

yourFileOrDirName,drwxr-xr-x,2022-03-02 11:58:48.733821177 +0100,346

See more info about the stat command here.

After you get such output, I believe you can easily 'convert' it to json format if you really need it.

Furthermore, you can run the stat command like this:

$ stat --printf="{\"data\":[{\"name\":\"%n\",\"perm\":\"%A\",\"mod_time\":\"%y\",\"size\":\"%s\"}]}" yourFileOrDirName

Or as @mdaniel suggested, since the command does not contain any shell variables, nor a ', the cleaner command is:

stat --printf='{"data":[{"name":"%n","perm":"%A","mod_time":"%y","size":"%s"}]}' yourFileOrDirName

and get the DIY json output:

{"data":[{"name":"yourFileOrDirName","perm":"drwxrwxr-x","mod_time":"2022-02-04 15:17:27.000000000 +0000","size":"4096"}]}

Source https://stackoverflow.com/questions/71331142

QUESTION

How can i change heap size when i use docker-compose and dockerfile to create a javaproject?

Asked 2021-Nov-06 at 14:38

I wanna use docker-compose to scale heap size when i need, i failed, i need your help, please!!!

Dockerfile :

FROM openjdk:8-jdk
MAINTAINER whywhathow(whywhathow.fun@gmail.com)
ENV \
JVM_GC="UseParallelGC"\
JVM_XMS="128m" \
JVM_XMX="256m"  \
NACOS_ADDR="127.0.0.1:8848" \
JAVA_OPTS="-Xms${JVM_XMS} -Xmx${JVM_XMX}-XX:+${JVM_GC} -Djava.security.egd=file:/dev/./urandom"\
PARAMS="--server.port=8080 --spring.profiles.active=prod --spring.cloud.nacos.server-addr=${NACOS_ADDR} --spring.cloud.nacos.config.namespace=prod --spring.cloud.nacos.config.file-extension=yml"
RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone
COPY ./*.jar /app.jar
#EXPOSE 8080
ENTRYPOINT ["/bin/sh","-c","java  ${JAVA_OPTS} -jar app.jar ${PARAMS}"]

docker-compose.yml

version: '3'
services:
  ruoyi-gateway:
    build:
      context: ./service/gateway/
    container_name: ruoyi-gateway
    image: ruoyi-gateway
    ports:
      - "8080:8080"
    environment:
      JVM_XMS: 256m
      JVM_XMX: 256m
      JVM_GC: UseG1GC

so, I believe my config file can work. I'm wrong, I find the problem, error message as list:

       "Mounts": [],
        "Config": {
            "Hostname": "7a5862c10b9b",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "ExposedPorts": {
                "8080/tcp": {}
            },
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "JVM_XMS=256m",
                "JVM_XMX=256m",
                "JVM_GC=UseG1GC",
                "PATH=/usr/local/openjdk-8/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "JAVA_HOME=/usr/local/openjdk-8",
                "LANG=C.UTF-8",
                "JAVA_VERSION=8u312",
                "NACOS_ADDR=121.41.120.209:8848",
                "JAVA_OPTS=-Xms -Xmx-XX:+ -Djava.security.egd=file:/dev/./urandomPARAMS=--server.port=8080 --spring.profiles.active=prod --spring.cloud.nacos.server-addr= --spring.cloud.nacos.config.namespace=prod --spring.cloud.nacos.config.file-extension=yml"
            ],
            "Cmd": null,
            "Image": "ruoyi-gateway",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": [
                "/bin/sh",
                "-c",
                "java  ${JAVA_OPTS} -jar app.jar ${PARAMS}"
            ],

docker inspcet information

ANSWER

Answered 2021-Oct-26 at 11:00

A Dockerfile ENV directive can only refer to environment variables that are already defined. Without shell hackery, there's no way to define an environment variable that depends on the value some other variable will eventually have.

For the specific case of the JVM heap size, as of Java 8 update 131, the JVM knows how to see Docker memory limits. As of Java 8 update 190, the default maximum heap size is 25% of available memory, but you can change this, for example

ENV JAVA_OPTS="-XX:MaxRAMPercentage=75 ..." # but no -Xmx

and use the docker run -m option to set the container memory limit. If you set docker run -m 1g, for example, the JVM heap size will be 768 MiB.

If that's not an option, I would work around this by setting up the JVM options at execution time. Write a script that sets up $JAVA_OPTS, then runs some command that's passed to it as command-line parameters.

#!/bin/sh
# docker-entrypoint.sh

# Set JVM memory options if set as environment variables.
if [ -n "$JVM_XMS" ]; then
  JAVA_OPTS="$JAVA_OPTS -Xms$JVM_XMS"
fi
if [ -n "$JVM_XMX" ]; then
  JAVA_OPTS="$JAVA_OPTS -Xmx$JVM_XMX"
fi

# Then run the main container command.
exec "$@"

In the Dockerfile you don't need to set -Xmx in the default JVM options, since the entrypoint script will add it for you. You do need to name this script as the Docker ENTRYPOINT.

ENV ... \
    JAVA_OPTS="-Djava.security.egd=file:/dev/./urandom" \
    ...
COPY docker-entrypoint.sh /
ENTRYPOINT ["/docker-entrypoint.sh"]         # must be JSON array form
CMD java ${JAVA_OPTS} -jar app.jar ${PARAMS} # Docker inserts `sh -c`

I might also consider using environment variables rather than command-line arguments for the various Spring settings. Spring accepts both, but it's much easier to incrementally set individual environment variables than to try to rewrite the $PARAMS list.

ENV ... \
    SERVER_PORT=8080 \
    SPRING_PROFILES_ACTIVE=prod \
    ...
CMD java $JAVA_OPTS -jar app.jar # without $PARAMS

As a final variation, if there are things you need to routinely pass as parameters, it's possible to embed the application call in the entrypoint script. This makes it harder to do things like get a debugging shell (docker run --rm -it your-image bash) but easier to pass parameters without repeating the java command (docker run -d your-image --option). In this setup, you'd end the entrypoint script with the java command, relaying any parameters passed to the script

exec java $JAVA_OPTS -jar app.jar "$@"

You would not need to mention the java command in the Dockerfile, but you would need to spell out the options in the CMD, which must be JSON-array form (one option to an array item). You cannot use environment variables or other shell substitutions with this setup.

# if this runs `java -jar app.jar`
ENTRYPOINT ["/docker-entrypoint.sh"]
# then include additional options here -- MUST be a JSON array
CMD ["--server.port=8080", "--spring.profiles.active=prod"]

Source https://stackoverflow.com/questions/69718900

QUESTION

Error creating bean with name 'projectController': Unsatisfied dependency expressed through field 'service';

Asked 2020-Nov-20 at 07:59

I use the following configuration and code to create a spring boot application.

pom.xml:



    
        jeecg-boot-parent
        org.jeecgframework.boot
        2.3.0
    
    4.0.0
    my-pm-project
    
        
            org.jeecgframework.boot
            jeecg-system-cloud-api
        
        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-nacos-discovery
        
        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-sentinel
        
        
            org.jeecgframework.boot
            jeecg-boot-base-common
        
        
            org.springframework.boot
            spring-boot-starter-data-mongodb

Controller:

package cn.my.pm.project.controller;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jeecg.common.api.vo.Result;
import org.jeecg.common.system.query.QueryGenerator;
import org.jeecg.common.util.oConvertUtils;
import cn.my.pm.project.entity.Project;
import cn.my.pm.project.service.IProjectService;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import lombok.extern.slf4j.Slf4j;
import org.jeecg.common.system.base.controller.JeecgController;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.servlet.ModelAndView;
import com.alibaba.fastjson.JSON;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.jeecg.common.aspect.annotation.AutoLog;


@RestController
@RequestMapping("/project/project")
@Slf4j
public class ProjectController extends JeecgController {
    @Autowired
    private IProjectService projectService;
    

    @GetMapping(value = "/list")
    public Result queryPageList(Project project,
                                   @RequestParam(name="pageNo", defaultValue="1") Integer pageNo,
                                   @RequestParam(name="pageSize", defaultValue="10") Integer pageSize,
                                   HttpServletRequest req) {
        QueryWrapper queryWrapper = QueryGenerator.initQueryWrapper(project, req.getParameterMap());
        Page page = new Page(pageNo, pageSize);
        IPage pageList = projectService.page(page, queryWrapper);
        return Result.OK(pageList);
    }
    

    @PostMapping(value = "/add")
    public Result add(@RequestBody Project project) {
        projectService.save(project);
        return Result.OK("add！");
    }
    

    @PutMapping(value = "/edit")
    public Result edit(@RequestBody Project project) {
        projectService.updateById(project);
        return Result.OK("edit!");
    }
    

    @DeleteMapping(value = "/delete")
    public Result delete(@RequestParam(name="id",required=true) String id) {
        projectService.removeById(id);
        return Result.OK("delete!");
    }
    

    @DeleteMapping(value = "/deleteBatch")
    public Result deleteBatch(@RequestParam(name="ids",required=true) String ids) {
        this.projectService.removeByIds(Arrays.asList(ids.split(",")));
        return Result.OK("batch delete!");
    }
    
    
    @GetMapping(value = "/queryById")
    public Result queryById(@RequestParam(name="id",required=true) String id) {
        Project project = projectService.getById(id);
        if(project==null) {
            return Result.error("not found");
        }
        return Result.OK(project);
    }


}

Service:

package cn.my.pm.project.service;

import cn.my.pm.project.entity.Project;
import com.baomidou.mybatisplus.extension.service.IService;

public interface IProjectService extends IService {

}

ServiceImpl:

package cn.my.pm.project.service.impl;

import cn.my.pm.project.entity.Project;
import cn.my.pm.project.mapper.ProjectMapper;
import cn.my.pm.project.service.IProjectService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

@Service
@Slf4j
public class ProjectServiceImpl extends ServiceImpl implements IProjectService {

}

Mapper:

package cn.my.pm.project.mapper;

import java.util.List;
import org.apache.ibatis.annotations.Param;
import cn.my.pm.project.entity.Project;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.springframework.stereotype.Service;

public interface ProjectMapper extends BaseMapper {

}

ProjectMapper.xml:

Entity:

package cn.my.pm.project.entity;

import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.math.BigDecimal;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
import com.fasterxml.jackson.annotation.JsonFormat;
import org.springframework.format.annotation.DateTimeFormat;
import org.jeecgframework.poi.excel.annotation.Excel;
import org.jeecg.common.aspect.annotation.Dict;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;

@Data
@TableName("my_info")

public class Project implements Serializable {
    private static final long serialVersionUID = 1L;
    private java.lang.String id;
    private java.lang.String myName;
    private java.lang.String myType;
    private java.lang.String myType;
    private java.lang.String myManager;
    private java.lang.String myInfo;
    private java.lang.String myDetails;
    private java.lang.String myImage;

}

Application:

package cn.my;

import org.apache.shiro.spring.boot.autoconfigure.ShiroAnnotationProcessorAutoConfiguration;
import org.apache.shiro.spring.boot.autoconfigure.ShiroAutoConfiguration;
import org.apache.shiro.spring.boot.autoconfigure.ShiroBeanAutoConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication(exclude = {ShiroAnnotationProcessorAutoConfiguration.class, ShiroAutoConfiguration.class, ShiroBeanAutoConfiguration.class})
@EnableDiscoveryClient
@EnableFeignClients
public class ProjectApplication {

    public static void main(String[] args) {
        SpringApplication.run(ProjectApplication.class, args);
    }
}

But when I run the application,the error message is:

ERROR org.springframework.boot.SpringApplication:858 - Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'projectController': Unsatisfied dependency expressed through field 'service'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'projectServiceImpl': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'cn.my.pm.project.mapper.ProjectMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1395)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
    at cn.my.ProjectApplication.main(ProjectApplication.java:18)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'projectServiceImpl': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'cn.my.pm.project.mapper.ProjectMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1395)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1247)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
    ... 19 common frames omitted
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'cn.my.pm.project.mapper.ProjectMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1654)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1213)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
    ... 32 common frames omitted
Disconnected from the target VM, address: '127.0.0.1:64977', transport: 'socket'

How to fix it?

ANSWER

Answered 2020-Nov-18 at 06:08

Spring's complaint is that you haven't defined a Bean of type ProjectMapper, which it is saying that it needs to satisfy an Autowire request. Looking at your code, I don't see a definition for such a Bean in what you've shown us here.

The exact point of the problem is hidden, I'm guessing, because you aren't showing us the definition of the ServiceImpl class. My guess is that that's where the actual reference is that Spring is trying to wire up. Apparently, the field name is baseMapper.

Source https://stackoverflow.com/questions/64887470

QUESTION

How to find which pom item introduces a specific external dependency?

Asked 2020-Mar-30 at 08:21

I want to find which pom item imports the following nacos-api:1.0.0

I thought it is this item which depends on it

but the details of it is as below:

so it is probably not? are there any ways to find which pom item introduces a specific external dependency, especially on IDEA?

maven tree doesn't help

    mvn dependency:tree -Dincludes=nacos-client:1.0.0
    [INFO] Scanning for projects...
    [INFO]                                                                 
    [INFO] ------------------------------------------------------------------------
    [INFO] Building user 0.0.1-SNAPSHOT
    [INFO] ------------------------------------------------------------------------
    [INFO]
    [INFO] --- maven-dependency-plugin:3.0.1:tree (default-cli) @ user ---
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD SUCCESS
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time: 2.172 s
    [INFO] Finished at: 2020-03-30T03:06:07+08:00
    [INFO] Final Memory: 37M/361M
    [INFO] ------------------------------------------------------------------------

ANSWER

Answered 2020-Mar-30 at 08:21

There is no such single action. But it is possible to find the corresponding for the library pom with these steps:

F4 (Go to source action) on selected item in External library will open this library configuration dialog:

Then use Alt+F7 (Find usages action) to show the module where this library is used:

Then you can find this module in Maven tool window (use speed search for example to locate it more easily), select it in the tree and navigate to corresponding pom using F4 (Go to source action) again:

Source https://stackoverflow.com/questions/60916973

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