[OBSDATA-3156] Apply Confluent Patches on top of Druid 28.0.1

.github/CODEOWNERS

@@ -0,0 +1 @@
+*	@confluentinc/obs-data @confluentinc/obs-oncall

.semaphore/project.yml

@@ -0,0 +1,42 @@
+# This file is managed by ServiceBot plugin - Semaphore. The content in this file is created using a common
+# template and configurations in service.yml.
+# Modifications in this file will be overwritten by generated content in the nightly run.
+# For more information, please refer to the page:
+# https://confluentinc.atlassian.net/wiki/spaces/Foundations/pages/2871296194/Add+SemaphoreCI
+apiVersion: v1alpha
+kind: Project
+metadata:
+  name: druid
+  description: ""
+spec:
+  visibility: private
+  repository:
+    url: git@github.com:confluentinc/druid.git
+    run_on:
+    - branches
+    - tags
+    - pull_requests
+    pipeline_file: .semaphore/semaphore.yml
+    integration_type: github_app
+    status:
+      pipeline_files:
+      - path: .semaphore/semaphore.yml
+        level: pipeline
+    whitelist:
+      branches:
+      - master
+      - /^.*-confluent$/
+  custom_permissions: true
+  debug_permissions:
+  - empty
+  - default_branch
+  - non_default_branch
+  - pull_request
+  - forked_pull_request
+  - tag
+  attach_permissions:
+  - default_branch
+  - non_default_branch
+  - pull_request
+  - forked_pull_request
+  - tag

.semaphore/semaphore.yml

@@ -0,0 +1,143 @@
+version: v1.0
+name: Apache Druid
+agent:
+  machine:
+    type: s1-prod-ubuntu20-04-amd64-1
+execution_time_limit:
+  hours: 3
+blocks:
+  - name: "Install"
+    task:
+      env_vars: &env_vars
+        - name: MVN
+          value: "mvn -B"
+        - name: MAVEN_OPTS
+          value: "-Dmaven.repo.local=.m2"
+        - name: MAVEN_SKIP
+          value: >
+            -Danimal.sniffer.skip=true
+            -Dcheckstyle.skip=true
+            -Ddruid.console.skip=true
+            -Denforcer.skip=true
+            -Dforbiddenapis.skip=true
+            -Dmaven.javadoc.skip=true
+            -Dpmd.skip=true
+            -Dspotbugs.skip=true
+
+        - name: MAVEN_SKIP_TESTS
+          value: "-DskipTests -Djacoco.skip=true"
+      prologue:
+        commands:
+          - echo $SEMAPHORE_WORKFLOW_ID
+          - sem-version java 17
+          - checkout
+      jobs:
+        - name: "Install"
+          commands:
+            # This is a change meant to validate semaphore public builds
+            # so thus removing configurations for Confluent's internal CodeArtifact
+            - rm ~/.m2/settings.xml
+            - >
+              MAVEN_OPTS="${MAVEN_OPTS} -Xmx3000m" ${MVN} clean install
+              -q -ff ${MAVEN_SKIP} ${MAVEN_SKIP_TESTS} -T1C
+            # downstream tests depend on artifacts installed by mvn install into .m2
+            # also cache target to avoid the cost of recompiling tests
+            - tar zcf cache-post-install.tgz .m2 target
+            - artifact push workflow cache-post-install.tgz
+
+  - name: "Tests"
+    task:
+      env_vars: *env_vars
+      prologue:
+        commands:
+          - echo $SEMAPHORE_WORKFLOW_ID
+          - sem-version java 17
+          - checkout
+          - artifact pull workflow cache-post-install.tgz
+          - tar zxf cache-post-install.tgz
+          # This is a change meant to validate semaphore public builds
+          # so thus removing configurations for Confluent's internal CodeArtifact
+          - rm ~/.m2/settings.xml
+      jobs:
+        - name: "animal sniffer checks"
+          commands:
+            - ${MVN} test-compile ${MAVEN_SKIP} ${MAVEN_SKIP_TESTS}
+            - ${MVN} animal-sniffer:check --fail-at-end
+
+        - name: "checkstyle"
+          commands:
+            - ${MVN} checkstyle:checkstyle --fail-at-end
+
+        - name: "enforcer checks"
+          commands:
+            - ${MVN} enforcer:enforce --fail-at-end
+
+        - name: "forbidden api checks"
+          commands:
+            - ${MVN} test-compile ${MAVEN_SKIP} ${MAVEN_SKIP_TESTS}
+            - ${MVN} forbiddenapis:check forbiddenapis:testCheck --fail-at-end
+
+        - name: "pmd checks"
+          commands:
+            - ${MVN} pmd:check --fail-at-end  # TODO: consider adding pmd:cpd-check
+
+        - name: "spotbugs checks"
+          commands:
+            - ${MVN} spotbugs:check --fail-at-end -pl '!benchmarks'
+
+        - name: "analyze dependencies"
+          commands:
+            - >
+              ${MVN} ${MAVEN_SKIP} dependency:analyze -DoutputXML=true -DignoreNonCompile=true -DfailOnWarning=true --fail-at-end || { echo "
+
+              The dependency analysis has found a dependency that is either:
+              1) Used and undeclared: These are available as a transitive dependency but should be explicitly
+              added to the POM to ensure the dependency version. The XML to add the dependencies to the POM is
+              shown above.
+              2) Unused and declared: These are not needed and removing them from the POM will speed up the build
+              and reduce the artifact size. The dependencies to remove are shown above.
+              If there are false positive dependency analysis warnings, they can be suppressed:
+              https://maven.apache.org/plugins/maven-dependency-plugin/analyze-mojo.html#usedDependencies
+              https://maven.apache.org/plugins/maven-dependency-plugin/examples/exclude-dependencies-from-dependency-analysis.html
+              For more information, refer to:
+              https://maven.apache.org/plugins/maven-dependency-plugin/analyze-mojo.html
+              " && false; }
+
+        - name: "Confluent Extensions"
+          env_vars:
+            - name: MAVEN_PROJECTS
+              value: extensions-contrib/confluent-extensions
+          commands: &run_tests
+            - >
+              MAVEN_OPTS="${MAVEN_OPTS} -Xmx1g" ${MVN} test -pl ${MAVEN_PROJECTS}
+              ${MAVEN_SKIP} -Dremoteresources.skip=true
+
+        - name: "Server"
+          env_vars:
+            - name: MAVEN_PROJECTS
+              value: server
+          commands: *run_tests
+
+        - name: "Processing"
+          env_vars:
+            - name: MAVEN_PROJECTS
+              value: processing
+          commands: *run_tests
+
+        - name: "Indexing Service"
+          env_vars:
+            - name: MAVEN_PROJECTS
+              value: indexing-service
+          commands: *run_tests
+
+        - name: "Kafka Indexing Service"
+          env_vars:
+            - name: MAVEN_PROJECTS
+              value: extensions-core/kafka-indexing-service
+          commands: *run_tests
+
+        - name: "Other Tests"
+          env_vars:
+            - name: MAVEN_PROJECTS
+              value: '!server,!processing,!indexing-service,!extensions-core/kafka-indexing-service,!extensions-contrib/confluent-extensions,!integration-tests-ex/cases'
+          commands: *run_tests

codestyle/checkstyle-suppressions.xml

@@ -70,4 +70,8 @@
   <suppress checks="ImportOrder" files="[\\/]target[\\/]generated-test-sources[\\/]" />
   <suppress checks="EmptyLineSeparator" files="[\\/]target[\\/]generated-test-sources[\\/]" />
   <suppress checks="AvoidStaticImport" files="[\\/]src[\\/](test)[\\/]"/>
+
+  <!-- Confluent Extensions -->
+  <suppress checks="Header" files="[\\/]io[\\/]confluent[\\/]" />
+  <suppress checks="PackageName" files="[\\/]io[\\/]confluent[\\/]" />
 </suppressions>