搖籃：多項目建設

Question

所以我有一個項目結構如下

root 
|-- module-1 
|-- module-2 
. 
. 
|-- module-n 

我們正在尋找最後的神器是從所有模塊的所有信號源的總罐子。我不確定這是否正確。 這裏是我的構建腳本：當添加

plugins { 
     id "com.github.johnrengelman.shadow" version "1.2.3" 
    } 

    group = 'com.root' 
    version = System.getenv('BUILD_NUMBER') ?:'1.0-SNAPSHOT' 
    apply plugin: 'java' 
    sourceCompatibility = 1.8 

    configurations { providedCompile } 

    repositories { 
     mavenLocal() 
     mavenCentral() 
    } 

    def sparkVersion = '2.0.0' 
    def scalaMajorVersion = '2.11' 

    sourceSets { 
     main { 
      java { 
       srcDirs = ['module1/src/main/java', 'module2/src/main/java'] 
      } 
     } 
    } 

    dependencies { 
     compile group: 'org.scala-lang', name:'scala-compiler', version:'2.11.8' 
     compile group: 'org.apache.kafka', name: 'kafka-clients', version: '0.9.0.0' 
     compile group: 'org.apache.spark', name: "spark-streaming-kafka_$scalaMajorVersion", version: '1.6.2' 
     compile group: 'org.apache.spark', name: "spark-streaming_$scalaMajorVersion", version: "$sparkVersion" 
     compile group: 'org.apache.spark', name: "spark-catalyst_$scalaMajorVersion", version: "$sparkVersion" 
     compile group: 'com.google.code.gson', name: 'gson', version: '2.7' 
     compile group: 'org.apache.zookeeper', name: 'zookeeper', version: '3.4.9' 
     providedCompile group: 'org.apache.spark', name: "spark-core_$scalaMajorVersion", version: "$sparkVersion" 
     providedCompile group: 'org.apache.spark', name: "spark-sql_$scalaMajorVersion", version: "$sparkVersion" 
     testCompile group: 'junit', name: 'junit', version: '4.11' 
    } 

    build.dependsOn(shadowJar); 

    shadowJar { 
     zip64 true 
    } 

    sourceSets.main.compileClasspath += configurations.providedCompile 
    sourceSets.test.compileClasspath += configurations.providedCompile 
    sourceSets.test.runtimeClasspath += configurations.providedCompile 

    artifacts { 
     archives file: shadowJar.archivePath, builtBy: shadowJar 
    } 

所以我們只是附加sourceSets一個新的模塊。

我只是想確認這是否是正確的方式來構建一個多模塊項目，如果不是正確的方式是什麼？以及如何解釋模塊間依賴關係？

Answer 1

由於每個模塊將.java編譯爲.class，您似乎是在複製邏輯，但是在聚合時再次執行此操作。如果是我，我有以下幾個模塊

root 
|-- module-1 
|-- module-2 
. 
. 
|-- module-n 
+-- uber 

而且uber模塊中我會使用shadow聚集編譯.class文件。您的uber/build.gradle可能看起來像

apply plugin: 'com.github.johnrengelman.shadow' 
apply plugin: 'java' 

dependencies { 
    runtime project(':module-1') 
    runtime project(':module-2') 
    runtime project(':module-N') 
} 

shadowJar { 
    baseName = 'foo' 
    classifier = 'bar' 
    version = project.version 
}