1. 从 GitHub 网站,git clone kafka 源码
2. 下载安装好 gradle,scala
2.1 从 dependencies.gradle 文件中找到 gradle 的版本,然后下载指定版本,并配置好 GRADLE_HOME 环境变量
3. 进入 kafka 项目目录,依次执行 gradle wrapper,gradle idea,gradle build --exclude-task test
4. 将工程导入到 idea
4.1 启动主类 kafka.Kafka
4.2 program arguments:config/server.properties
4.3 把 config 目录下的 log4j.properties 拷贝到 core/src/main/resources 目录
4.4 File -> Project Structure -> Modules
5. 启动程序
然而,大部分情况下,日志不会打印出来,配置一下 core 模块的 log4j 依赖
找到 build.gradle 文件中的 project(':core'),修改对应的 log4j 依赖,然后重新执行 gradle idea,重新导入 idea 中
project(':core') {
println "Building project 'core' with Scala version ${versions.scala}"
apply plugin: 'scala'
// scaladoc generation is configured at the sub-module level with an artifacts
// block (cf. see streams-scala). If scaladoc generation is invoked explicitly
// for the `core` module, this ensures the generated jar doesn't include scaladoc
// files since the `core` module doesn't include public APIs.
scaladoc {
enabled = false
}
if (userEnableTestCoverage)
apply plugin: "org.scoverage"
archivesBaseName = "kafka_${versions.baseScala}"
dependencies {
compile project(':clients')
compile project(':metadata')
compile project(':raft')
compile libs.argparse4j
compile libs.jacksonDatabind
compile libs.jacksonModuleScala
compile libs.jacksonDataformatCsv
compile libs.jacksonJDK8Datatypes
compile libs.joptSimple
compile libs.metrics
compile libs.scalaCollectionCompat
compile libs.scalaJava8Compat
compile libs.scalaLibrary
// only needed transitively, but set it explicitly to ensure it has the same version as scala-library
compile libs.scalaReflect
compile libs.scalaLogging
compile libs.slf4jApi
compile libs.slf4jlog4j
compile libs.log4j
compile(libs.zookeeper) {
// exclude module: 'slf4j-log4j12'
// exclude module: 'log4j'
}
// ZooKeeperMain depends on commons-cli but declares the dependency as `provided`
compile libs.commonsCli
compileOnly libs.log4j
testCompile project(':clients').sourceSets.test.output
testCompile libs.bcpkix
testCompile libs.mockitoCore
testCompile libs.easymock
testCompile(libs.apacheda) {
exclude group: 'xml-apis', module: 'xml-apis'
// `mina-core` is a transitive dependency for `apacheds` and `apacheda`.
// It is safer to use from `apacheds` since that is the implementation.
exclude module: 'mina-core'
}
testCompile libs.apachedsCoreApi
testCompile libs.apachedsInterceptorKerberos
testCompile libs.apachedsProtocolShared
testCompile libs.apachedsProtocolKerberos
testCompile libs.apachedsProtocolLdap
testCompile libs.apachedsLdifPartition
testCompile libs.apachedsMavibotPartition
testCompile libs.apachedsJdbmPartition
testCompile libs.junitJupiter
testCompile libs.slf4jlog4j
testCompile(libs.jfreechart) {
exclude group: 'junit', module: 'junit'
}
}
目标就是把下图的 log4j 依赖配置好。
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