【小笔记】idea里面编译与调试Skywalking源码

一、编译

文档：https://github.com/apache/skywalking/blob/master/docs/en/guides/How-to-build.md#build-from-github

搬运：

Build from GitHub

1. Prepare git, JDK8+ and Maven 3.6+

2. Clone project

   If you want to build a release from source codes, provide a 

   tag name

    by using 

   git clone -b [tag_name] ...

    while cloning.

   git clone --recurse-submodules https://github.com/apache/skywalking.git
   cd skywalking/
   
   OR
   
   git clone https://github.com/apache/skywalking.git
   cd skywalking/
   git submodule init
   git submodule update      

3. Run 

   ./mvnw clean package -DskipTests

4. All packages are in 

   /dist

    (.tar.gz for Linux and .zip for Windows).

NOTICE: If you clone the codes from GitHub, please make sure that you had finished step 1 to 3 in section Build from GitHub, if you download the source codes from the official website of SkyWalking, please make sure that you had followed the steps in section Build from Apache source code release.

1. Import the project as a maven project
2. Run 

   ./mvnw compile -Dmaven.test.skip=true

    to compile project and generate source codes. Because we use gRPC and protobuf.
3. Set Generated Source Codes folders.

   • grpc-java

      and 

     java

      folders in apm-protocol/apm-network/target/generated-sources/protobuf

   • grpc-java

      and 

     java

      folders in oap-server/server-core/target/generated-sources/protobuf

   • grpc-java

      and 

     java

      folders in oap-server/server-receiver-plugin/receiver-proto/target/generated-sources/protobuf

   • grpc-java

      and 

     java

      folders in oap-server/exporter/target/generated-sources/protobuf

   • grpc-java

      and 

     java

      folders in oap-server/server-configuration/grpc-configuration-sync/target/generated-sources/protobuf

   • antlr4

      folder in oap-server/oal-grammar/target/generated-sources

注意：由于Skywalking用到的lombok，所以idea必须要装这个插件

二、调试

与调试chaosblade代码类似：

好处：

• 打断点分析问题
• 修改代码不用编译，实时生效

效果图

(调试skywalking采样算法)

远程java程序需要配置一下jvm参数

-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005

IDEA配置