安装nix并配置channel:
sudo install -d -m755 -o $(id -u) -g $(id -g) /nix
curl https://nixos.org/nix/install | sh
nix-channel --add https://nixos.org/channels/nixos-20.03 nixos-20.03
nix-channel --update nixos-20.03
安装gradle及lombok:
nix-env -f ~/.nix-defexpr/channels/nixos-20.03 -iA gradle
nix-env -f ~/.nix-defexpr/channels/nixos-20.03 -iA lombok
安装emacs:
nix-env -f ~/.nix-defexpr/channels/nixos-20.03 -iA emacs
配置emacs:
创建并拷贝github文件内容至~/.emacs.d/init.el
https://github.com/clojurians-org/my-emacs/blob/master/init.el
代码片段解释:
- 安装lsp-java, gradle-mode
(dolist (package '(paredit restclient json-mode typescript-mode
dap-mode lsp-java gradle-mode
dante cider
))
(unless (package-installed-p package)
(package-install package)))
- 忽略文件变更
(setq lsp-file-watch-ignored
'(".idea" ".ensime_cache" ".eunit" "node_modules"
".git" ".hg" ".fslckout" "_FOSSIL_"
".bzr" "_darcs" ".tox" ".svn" ".stack-work"
"build"))
- 开启java编程及调试工具
(require 'dap-java)
(require 'lsp-java)
- 开启lombok支持
(setq path-to-lombok (car (file-expand-wildcards "/nix/store/*-lombok-*/share/java/lombok.jar") ) )
(setq lsp-java-vmargs
`("-noverify"
"-Xmx1G"
"-XX:+UseG1GC"
"-XX:+UseStringDeduplication"
,(concat "-javaagent:" path-to-lombok)
,(concat "-Xbootclasspath/a:" path-to-lombok)))
- 绑定java开发模式至lsp-mode + gradle-mode
(add-hook 'java-mode-hook #'lsp)
(add-hook 'java-mode-hook (lambda ()
(setq c-default-style "java")
(setq c-basic-offset 4)
(display-line-numbers-mode t)
(gradle-mode 1)
))
创建项目:
larrys-MacBook-Pro:my-test larluo$ mkdir my-test
larrys-MacBook-Pro:my-test larluo$ cd my-test
larrys-MacBook-Pro:my-test larluo$ gradle init
Select type of project to generate:
1: basic
2: application
3: library
4: Gradle plugin
Enter selection (default: basic) [1..4] 3
Select implementation language:
1: C++
2: Groovy
3: Java
4: Kotlin
5: Scala
6: Swift
Enter selection (default: Java) [1..6]
Select build script DSL:
1: Groovy
2: Kotlin
Enter selection (default: Groovy) [1..2]
Select test framework:
1: JUnit 4
2: TestNG
3: Spock
4: JUnit Jupiter
Enter selection (default: JUnit 4) [1..4]
Project name (default: my-test):
Source package (default: my.test):
> Task :init
Get more help with your project: https://docs.gradle.org/5.6.1/userguide/java_library_plugin.html
BUILD SUCCESSFUL in 5m 14s
2 actionable tasks: 2 executed
添加application运行支持
修改build.gradle文件内容
- 添加application插件并设置MainClass
plugins {
// Apply the java-library plugin to add support for Java Library
id 'java-library'
id "application"
}
application {
mainClassName = "my.test.Library"
}
- 设置国内源
repositories {
maven {
url "https://mirrors.tuna.tsinghua.edu.cn/clojars/"
}
maven {
url "http://maven.aliyun.com/nexus/content/groups/public"
}
mavenLocal()
}
- 添加依赖
dependencies {
api 'commons-codec:commons-codec:1.14'
testImplementation 'junit:junit:4.12'
}
使用emacs编码
- 打开文件
emacs -nw src/main/java/my/test/Library.java
- 导入项目
i==>Import project root /Users/larluo/my-tmp/my-test/src/main/java/my/test/.
I==>Import project by selecting root directory interactively.
d==>Do not ask again for the current project by adding /Users/larluo/my-tmp/my-test/src/main/java/my/test/ to lsp-session-folders-b\
lacklist.
D==>Do not ask again for the current project by selecting ignore path interactively.
n==>Do nothing: ask again when opening other files from the current project.
选择I, 输入项目目录，后续可变改
-
打开错误提示面板，并编写代码
[C-l, !, l] 打开错误面板
image.png -
简单编写main方法
image.png -
使用M-., M-, 进行代码跳转
image.png
使用gradle-mode编译运行
https://github.com/jacobono/emacs-gradle-mode
输入C-c C-g r, 接着输入run运行Application。
image.png
项目实战
- 打开linked datahub效果:
https://github.com/linkedin/datahub
emacs -nw metadata-jobs/mae-consumer-job/src/main/java/com/linkedin/metadata/kafka/MaeStreamTask.java
image.png