Build a dummy(empty) javadoc of finagle and jdk-http plugins (#499)

* Build a dummy(empty) javadoc of finagle and jdk-http plugins

* Add javadoc check for the CI.

.github/workflows/ci.yaml

@@ -66,7 +66,7 @@ jobs:
       - name: Check Javaagent Plugin List
         run: tools/plugin/check-javaagent-plugin-list.sh
       - name: Install and Test
-        run: ./mvnw -q --batch-mode clean verify install
+        run: ./mvnw -q --batch-mode clean verify install javadoc:javadoc
 
   ci:
     name: CI

CHANGES.md

@@ -25,6 +25,7 @@ Release Notes.
 * Fix a thread leak in `SamplingService` when updated sampling policy in the runtime.
 * Support MySQL plugin tracing SQL parameters when useServerPrepStmts 
 * Update the endpoint name of `Undertow` plugin to `Method:Path`.
+* Build a dummy(empty) javadoc of finagle and jdk-http plugins due to incompatibility.
 
 #### Documentation
 * Update docs of Tracing APIs, reorganize the API docs into six parts.

apm-sniffer/apm-sdk-plugin/finagle-6.25.x-plugin/pom.xml

@@ -54,6 +54,40 @@
 
     <build>
         <plugins>
+            <!-- Build a dummy(empty) javadoc to satisfy maven central requirements -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <failOnError>false</failOnError>
+                </configuration>
+            </plugin>
+            <!-- Ignore the error of javadoc build -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>empty-javadoc-jar</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                        <configuration>
+                            <classifier>javadoc</classifier>
+                            <classesDirectory>${basedir}/javadoc</classesDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>net.alchim31.maven</groupId>
                 <artifactId>scala-maven-plugin</artifactId>

apm-sniffer/bootstrap-plugins/jdk-http-plugin/pom.xml

@@ -40,6 +40,40 @@
             <plugin>
                 <artifactId>maven-deploy-plugin</artifactId>
             </plugin>
+            <!-- Ignore the error of javadoc build -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <failOnError>false</failOnError>
+                </configuration>
+            </plugin>
+            <!-- Build a dummy(empty) javadoc to satisfy maven central requirements -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>empty-javadoc-jar</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                        <configuration>
+                            <classifier>javadoc</classifier>
+                            <classesDirectory>${basedir}/javadoc</classesDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 </project>