Add km module kafka

checkstyle/.scalafmt.conf

@@ -0,0 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+docstrings = JavaDoc
+maxColumn = 120
+continuationIndent.defnSite = 2
+assumeStandardLibraryStripMargin = true
+danglingParentheses = true
+rewrite.rules = [SortImports, RedundantBraces, RedundantParens, SortModifiers]

checkstyle/checkstyle.xml

@@ -0,0 +1,142 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE module PUBLIC
+    "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
+     "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+<!--
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+-->
+<module name="Checker">
+  <property name="localeLanguage" value="en"/>
+
+  <module name="FileTabCharacter"/>
+
+  <!-- header -->
+  <module name="Header">
+    <property name="headerFile" value="${headerFile}" />
+  </module>
+
+  <module name="TreeWalker">
+
+    <!-- code cleanup -->
+    <module name="UnusedImports">
+      <property name="processJavadoc" value="true" />
+    </module>
+    <module name="RedundantImport"/>
+    <module name="IllegalImport" />
+    <module name="EqualsHashCode"/>
+    <module name="SimplifyBooleanExpression"/>
+    <module name="OneStatementPerLine"/>
+    <module name="UnnecessaryParentheses" />
+    <module name="SimplifyBooleanReturn"/>
+
+    <!-- style -->
+    <module name="DefaultComesLast"/>
+    <module name="EmptyStatement"/>
+    <module name="ArrayTypeStyle"/>
+    <module name="UpperEll"/>
+    <module name="LeftCurly"/>
+    <module name="RightCurly"/>
+    <module name="EmptyStatement"/>
+    <module name="ConstantName">
+      <property name="format" value="(^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$)|(^log$)"/>
+    </module>
+    <module name="LocalVariableName"/>
+    <module name="LocalFinalVariableName"/>
+    <module name="MemberName"/>
+    <module name="ClassTypeParameterName">
+      <property name="format" value="^[A-Z][a-zA-Z0-9]*$$"/>
+    </module>
+    <module name="MethodTypeParameterName">
+      <property name="format" value="^[A-Z][a-zA-Z0-9]*$$"/>
+    </module>
+    <module name="InterfaceTypeParameterName">
+      <property name="format" value="^[A-Z][a-zA-Z0-9]*$$"/>
+    </module>
+    <module name="PackageName"/>
+    <module name="ParameterName"/>
+    <module name="StaticVariableName"/>
+    <module name="TypeName"/>
+    <module name="AvoidStarImport"/>
+
+    <!-- variables that can be final should be final (suppressed except for Streams) -->
+    <module name="FinalLocalVariable">
+      <property name="tokens" value="VARIABLE_DEF,PARAMETER_DEF"/>
+      <property name="validateEnhancedForLoopVariable" value="true"/>
+    </module>
+
+    <!-- dependencies -->
+    <module name="ImportControl">
+      <property name="file" value="${importControlFile}"/>
+    </module>
+
+    <!-- whitespace -->
+    <module name="GenericWhitespace"/>
+    <module name="NoWhitespaceBefore"/>
+    <module name="WhitespaceAfter" />
+    <module name="NoWhitespaceAfter"/>
+    <module name="WhitespaceAround">
+      <property name="allowEmptyConstructors" value="true"/>
+      <property name="allowEmptyMethods" value="true"/>
+    </module>
+    <module name="Indentation"/>
+    <module name="MethodParamPad"/>
+    <module name="ParenPad"/>
+    <module name="TypecastParenPad"/>
+
+    <!-- locale-sensitive methods should specify locale -->
+    <module name="Regexp">
+      <property name="format" value="\.to(Lower|Upper)Case\(\)"/>
+      <property name="illegalPattern" value="true"/>
+      <property name="ignoreComments" value="true"/>
+    </module>
+
+    <!-- code quality -->
+    <module name="MethodLength"/>
+    <module name="ParameterNumber">
+      <!-- default is 8 -->
+      <property name="max" value="13"/>
+    </module>
+    <module name="ClassDataAbstractionCoupling">
+      <!-- default is 7 -->
+      <property name="max" value="25"/>
+    </module>
+    <module name="BooleanExpressionComplexity">
+      <!-- default is 3 -->
+      <property name="max" value="5"/>
+    </module>
+
+    <module name="ClassFanOutComplexity">
+      <!-- default is 20 -->
+      <property name="max" value="50"/>
+    </module>
+    <module name="CyclomaticComplexity">
+      <!-- default is 10-->
+      <property name="max" value="16"/>
+    </module>
+    <module name="JavaNCSS">
+      <!-- default is 50 -->
+      <property name="methodMaximum" value="100"/>
+    </module>
+    <module name="NPathComplexity">
+      <!-- default is 200 -->
+      <property name="max" value="500"/>
+    </module>
+  </module>
+
+  <module name="SuppressionFilter">
+    <property name="file" value="${suppressionsFile}"/>
+  </module>
+</module>

checkstyle/import-control-core.xml

@@ -0,0 +1,57 @@
+<!DOCTYPE import-control PUBLIC
+"-//Puppy Crawl//DTD Import Control 1.1//EN"
+"http://www.puppycrawl.com/dtds/import_control_1_1.dtd">
+<!--
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+-->
+
+<import-control pkg="kafka">
+
+  <!-- THINK HARD ABOUT THE LAYERING OF THE PROJECT BEFORE CHANGING THIS FILE -->
+
+  <!-- common library dependencies -->
+  <allow pkg="java" />
+  <allow pkg="scala" />
+  <allow pkg="javax.management" />
+  <allow pkg="org.slf4j" />
+  <allow pkg="org.junit" />
+  <allow pkg="org.easymock" />
+  <allow pkg="java.security" />
+  <allow pkg="javax.net.ssl" />
+  <allow pkg="javax.security" />
+  <allow pkg="com.didichuxing.datachannel.kafka" />
+
+  <allow pkg="kafka.common" />
+  <allow pkg="kafka.utils" />
+  <allow pkg="kafka.serializer" />
+  <allow pkg="org.apache.kafka.common" />
+
+  <subpackage name="tools">
+    <allow pkg="org.apache.kafka.clients.admin" />
+    <allow pkg="kafka.admin" />
+    <allow pkg="joptsimple" />
+    <allow pkg="org.apache.kafka.clients.consumer" />
+  </subpackage>
+
+  <subpackage name="coordinator">
+    <allow class="kafka.server.MetadataCache" />
+  </subpackage>
+
+  <subpackage name="examples">
+    <allow pkg="org.apache.kafka.clients" />
+  </subpackage>
+
+</import-control>

checkstyle/import-control-jmh-benchmarks.xml

@@ -0,0 +1,47 @@
+<!DOCTYPE import-control PUBLIC
+        "-//Puppy Crawl//DTD Import Control 1.1//EN"
+        "http://www.puppycrawl.com/dtds/import_control_1_1.dtd">
+<!--
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+-->
+
+<import-control pkg="org.apache.kafka.jmh">
+
+    <allow pkg="java"/>
+    <allow pkg="scala"/>
+    <allow pkg="javax.management"/>
+    <allow pkg="org.slf4j"/>
+    <allow pkg="org.openjdk.jmh.annotations"/>
+    <allow pkg="org.openjdk.jmh.runner"/>
+    <allow pkg="org.openjdk.jmh.infra"/>
+    <allow pkg="java.security"/>
+    <allow pkg="javax.net.ssl"/>
+    <allow pkg="javax.security"/>
+    <allow pkg="org.apache.kafka.common"/>
+    <allow pkg="org.apache.kafka.clients.producer"/>
+    <allow pkg="kafka.cluster"/>
+    <allow pkg="kafka.log"/>
+    <allow pkg="kafka.server"/>
+    <allow pkg="kafka.api"/>
+    <allow class="kafka.utils.Pool"/>
+    <allow class="kafka.utils.KafkaScheduler"/>
+    <allow class="org.apache.kafka.clients.FetchSessionHandler"/>
+    <allow pkg="org.mockito"/>
+
+
+    <subpackage name="cache">
+    </subpackage>
+</import-control>

checkstyle/import-control.xml

@@ -0,0 +1,457 @@
+<!DOCTYPE import-control PUBLIC
+"-//Puppy Crawl//DTD Import Control 1.1//EN"
+"http://www.puppycrawl.com/dtds/import_control_1_1.dtd">
+<!--
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+-->
+
+<import-control pkg="org.apache.kafka">
+
+  <!-- THINK HARD ABOUT THE LAYERING OF THE PROJECT BEFORE CHANGING THIS FILE -->
+
+  <!-- common library dependencies -->
+  <allow pkg="java" />
+  <allow pkg="javax.management" />
+  <allow pkg="org.slf4j" />
+  <allow pkg="org.junit" />
+  <allow pkg="org.hamcrest" />
+  <allow pkg="org.mockito" />
+  <allow pkg="org.easymock" />
+  <allow pkg="org.powermock" />
+  <allow pkg="java.security" />
+  <allow pkg="javax.net.ssl" />
+  <allow pkg="javax.security" />
+  <allow pkg="org.ietf.jgss" />
+
+  <!-- no one depends on the server -->
+  <disallow pkg="kafka" />
+
+  <!-- anyone can use public classes -->
+  <allow pkg="org.apache.kafka.common" exact-match="true" />
+  <allow pkg="org.apache.kafka.common.security" />
+  <allow pkg="org.apache.kafka.common.serialization" />
+  <allow pkg="org.apache.kafka.common.utils" />
+  <allow pkg="org.apache.kafka.common.errors" exact-match="true" />
+  <allow pkg="org.apache.kafka.common.memory" />
+
+  <subpackage name="common">
+    <disallow pkg="org.apache.kafka.clients" />
+    <allow pkg="org.apache.kafka.common" exact-match="true" />
+    <allow pkg="org.apache.kafka.common.annotation" />
+    <allow pkg="org.apache.kafka.common.config" exact-match="true" />
+    <allow pkg="org.apache.kafka.common.internals" exact-match="true" />
+    <allow pkg="org.apache.kafka.test" />
+
+    <subpackage name="acl">
+      <allow pkg="org.apache.kafka.common.annotation" />
+      <allow pkg="org.apache.kafka.common.acl" />
+      <allow pkg="org.apache.kafka.common.resource" />
+    </subpackage>
+
+    <subpackage name="config">
+      <allow pkg="org.apache.kafka.common.config" />
+      <!-- for testing -->
+      <allow pkg="org.apache.kafka.common.metrics" />
+    </subpackage>
+
+    <subpackage name="message">
+      <allow pkg="com.fasterxml.jackson" />
+      <allow pkg="org.apache.kafka.common.protocol" />
+      <allow pkg="org.apache.kafka.common.protocol.types" />
+      <allow pkg="org.apache.kafka.common.message" />
+    </subpackage>
+
+    <subpackage name="metrics">
+      <allow pkg="org.apache.kafka.common.metrics" />
+    </subpackage>
+
+    <subpackage name="memory">
+      <allow pkg="org.apache.kafka.common.metrics" />
+    </subpackage>
+
+    <subpackage name="network">
+      <allow pkg="org.apache.kafka.common.security.auth" />
+      <allow pkg="org.apache.kafka.common.protocol" />
+      <allow pkg="org.apache.kafka.common.config" />
+      <allow pkg="org.apache.kafka.common.metrics" />
+      <allow pkg="org.apache.kafka.common.security" />
+    </subpackage>
+
+    <subpackage name="resource">
+      <allow pkg="org.apache.kafka.common.annotation" />
+      <allow pkg="org.apache.kafka.common.resource" />
+    </subpackage>
+
+    <subpackage name="security">
+      <allow pkg="org.apache.kafka.common.annotation" />
+      <allow pkg="org.apache.kafka.common.network" />
+      <allow pkg="org.apache.kafka.common.config" />
+      <allow pkg="org.apache.kafka.common.protocol" />
+      <allow pkg="org.apache.kafka.common.errors" />
+      <subpackage name="authenticator">
+        <allow pkg="org.apache.kafka.common.message" />
+        <allow pkg="org.apache.kafka.common.protocol.types" />
+        <allow pkg="org.apache.kafka.common.requests" />
+        <allow pkg="org.apache.kafka.clients" />
+      </subpackage>
+      <subpackage name="scram">
+        <allow pkg="javax.crypto" />
+      </subpackage>
+      <subpackage name="oauthbearer">
+        <allow pkg="com.fasterxml.jackson.databind" />
+      </subpackage>
+    </subpackage>
+
+    <subpackage name="protocol">
+      <allow pkg="org.apache.kafka.common.errors" />
+      <allow pkg="org.apache.kafka.common.message" />
+      <allow pkg="org.apache.kafka.common.protocol" />
+      <allow pkg="org.apache.kafka.common.protocol.types" />
+      <allow pkg="org.apache.kafka.common.record" />
+      <allow pkg="org.apache.kafka.common.requests" />
+      <allow pkg="org.apache.kafka.common.resource" />
+    </subpackage>
+
+    <subpackage name="record">
+      <allow pkg="net.jpountz" />
+      <allow pkg="org.apache.kafka.common.header" />
+      <allow pkg="org.apache.kafka.common.record" />
+      <allow pkg="org.apache.kafka.common.network" />
+      <allow pkg="org.apache.kafka.common.protocol" />
+      <allow pkg="org.apache.kafka.common.protocol.types" />
+      <allow pkg="org.apache.kafka.common.errors" />
+    </subpackage>
+
+    <subpackage name="header">
+      <allow pkg="org.apache.kafka.common.header" />
+      <allow pkg="org.apache.kafka.common.record" />
+    </subpackage>
+
+    <subpackage name="requests">
+      <allow pkg="org.apache.kafka.common.acl" />
+      <allow pkg="org.apache.kafka.common.protocol" />
+      <allow pkg="org.apache.kafka.common.message" />
+      <allow pkg="org.apache.kafka.common.network" />
+      <allow pkg="org.apache.kafka.common.requests" />
+      <allow pkg="org.apache.kafka.common.resource" />
+      <allow pkg="org.apache.kafka.common.record" />
+      <!-- for AuthorizableRequestContext interface -->
+      <allow pkg="org.apache.kafka.server.authorizer" />
+      <!-- for testing -->
+      <allow pkg="org.apache.kafka.common.errors" />
+    </subpackage>
+
+    <subpackage name="serialization">
+      <allow class="org.apache.kafka.common.errors.SerializationException" />
+      <allow class="org.apache.kafka.common.header.Headers" />
+    </subpackage>
+
+    <subpackage name="utils">
+      <allow pkg="org.apache.kafka.common" />
+    </subpackage>
+  </subpackage>
+
+  <subpackage name="clients">
+    <allow pkg="org.slf4j" />
+    <allow pkg="org.apache.kafka.common" />
+    <allow pkg="org.apache.kafka.clients" exact-match="true"/>
+    <allow pkg="org.apache.kafka.test" />
+
+    <subpackage name="consumer">
+      <allow pkg="org.apache.kafka.clients.consumer" />
+    </subpackage>
+
+    <subpackage name="producer">
+      <allow pkg="org.apache.kafka.clients.consumer" />
+      <allow pkg="org.apache.kafka.clients.producer" />
+    </subpackage>
+
+    <subpackage name="admin">
+      <allow pkg="org.apache.kafka.clients.admin" />
+      <allow pkg="org.apache.kafka.clients.consumer.internals" />
+      <allow pkg="org.apache.kafka.clients.consumer" />
+    </subpackage>
+  </subpackage>
+
+  <subpackage name="server">
+    <allow pkg="org.slf4j" />
+    <allow pkg="org.apache.kafka.common" />
+    <allow pkg="org.apache.kafka.test" />
+  </subpackage>
+
+  <subpackage name="tools">
+    <allow pkg="org.apache.kafka.common"/>
+    <allow pkg="org.apache.kafka.clients.admin" />
+    <allow pkg="org.apache.kafka.clients.producer" />
+    <allow pkg="org.apache.kafka.clients.consumer" />
+    <allow pkg="com.fasterxml.jackson" />
+    <allow pkg="net.sourceforge.argparse4j" />
+    <allow pkg="org.apache.log4j" />
+  </subpackage>
+
+  <subpackage name="trogdor">
+    <allow pkg="com.fasterxml.jackson" />
+    <allow pkg="javax.servlet" />
+    <allow pkg="javax.ws.rs" />
+    <allow pkg="net.sourceforge.argparse4j" />
+    <allow pkg="org.apache.kafka.clients" />
+    <allow pkg="org.apache.kafka.clients.admin" />
+    <allow pkg="org.apache.kafka.clients.consumer" exact-match="true"/>
+    <allow pkg="org.apache.kafka.clients.producer" exact-match="true"/>
+    <allow pkg="org.apache.kafka.common" />
+    <allow pkg="org.apache.kafka.test"/>
+    <allow pkg="org.apache.kafka.trogdor" />
+    <allow pkg="org.apache.log4j" />
+    <allow pkg="org.eclipse.jetty" />
+    <allow pkg="org.glassfish.jersey" />
+  </subpackage>
+
+  <subpackage name="message">
+    <allow pkg="com.fasterxml.jackson" />
+    <allow pkg="com.fasterxml.jackson.annotation" />
+  </subpackage>
+
+  <subpackage name="streams">
+    <allow pkg="org.apache.kafka.common"/>
+    <allow pkg="org.apache.kafka.test"/>
+    <allow pkg="org.apache.kafka.clients"/>
+    <allow pkg="org.apache.kafka.clients.producer" exact-match="true"/>
+    <allow pkg="org.apache.kafka.clients.consumer" exact-match="true"/>
+
+    <allow pkg="org.apache.kafka.streams"/>
+
+    <subpackage name="examples">
+      <allow pkg="com.fasterxml.jackson" />
+      <allow pkg="org.apache.kafka.connect.json" />
+    </subpackage>
+
+    <subpackage name="perf">
+      <allow pkg="com.fasterxml.jackson.databind" />
+    </subpackage>
+    
+    <subpackage name="integration">
+      <allow pkg="kafka.admin" />
+      <allow pkg="kafka.api" />
+      <allow pkg="kafka.server" />
+      <allow pkg="kafka.tools" />
+      <allow pkg="kafka.utils" />
+      <allow pkg="kafka.log" />
+      <allow pkg="scala" />
+      <allow class="kafka.zk.EmbeddedZookeeper"/>
+      <allow pkg="com.fasterxml.jackson" />
+    </subpackage>
+
+    <subpackage name="test">
+      <allow pkg="kafka.admin" />
+    </subpackage>
+
+    <subpackage name="tools">
+      <allow pkg="kafka.tools" />
+    </subpackage>
+
+    <subpackage name="state">
+      <allow pkg="org.rocksdb" />
+    </subpackage>
+
+    <subpackage name="processor">
+      <subpackage name="internals">
+        <allow pkg="com.fasterxml.jackson" />
+        <allow pkg="kafka.utils" />
+        <allow pkg="org.apache.zookeeper" />
+        <allow pkg="org.apache.zookeeper" />
+        <allow pkg="org.apache.log4j" />
+        <subpackage name="testutil">
+          <allow pkg="org.apache.log4j" />
+        </subpackage>
+      </subpackage>
+    </subpackage>
+  </subpackage>
+
+  <subpackage name="jmh">
+    <allow pkg="org.openjdk.jmh.annotations" />
+    <allow pkg="org.openjdk.jmh.runner" />
+    <allow pkg="org.openjdk.jmh.runner.options" />
+    <allow pkg="org.openjdk.jmh.infra" />
+    <allow pkg="org.apache.kafka.common" />
+    <allow pkg="org.apache.kafka.clients" />
+    <allow pkg="org.apache.kafka.streams" />
+    <allow pkg="org.github.jamm" />
+  </subpackage>
+
+  <subpackage name="log4jappender">
+    <allow pkg="org.apache.log4j" />
+    <allow pkg="org.apache.kafka.clients" />
+    <allow pkg="org.apache.kafka.common" />
+    <allow pkg="org.apache.kafka.test" />
+  </subpackage>
+
+  <subpackage name="test">
+    <allow pkg="org.apache.kafka" />
+    <allow pkg="org.bouncycastle" />
+  </subpackage>
+
+  <subpackage name="connect">
+    <allow pkg="org.apache.kafka.common" />
+    <allow pkg="org.apache.kafka.connect.data" />
+    <allow pkg="org.apache.kafka.connect.errors" />
+    <allow pkg="org.apache.kafka.connect.header" />
+    <allow pkg="org.apache.kafka.connect.components"/>
+    <allow pkg="org.apache.kafka.clients" />
+    <allow pkg="org.apache.kafka.test"/>
+
+    <subpackage name="source">
+      <allow pkg="org.apache.kafka.connect.connector" />
+      <allow pkg="org.apache.kafka.connect.storage" />
+    </subpackage>
+
+    <subpackage name="sink">
+      <allow pkg="org.apache.kafka.clients.consumer" />
+      <allow pkg="org.apache.kafka.connect.connector" />
+      <allow pkg="org.apache.kafka.connect.storage" />
+    </subpackage>
+
+    <subpackage name="converters">
+      <allow pkg="org.apache.kafka.connect.storage" />
+    </subpackage>
+
+    <subpackage name="connector.policy">
+      <allow pkg="org.apache.kafka.connect.health" />
+      <allow pkg="org.apache.kafka.connect.connector" />
+      <!-- for testing -->
+      <allow pkg="org.apache.kafka.connect.runtime" />
+    </subpackage>
+
+    <subpackage name="rest">
+      <allow pkg="org.apache.kafka.connect.health" />
+      <allow pkg="javax.ws.rs" />
+      <allow pkg= "javax.security.auth"/>
+      <subpackage name="basic">
+        <allow pkg="org.apache.kafka.connect.rest"/>
+      </subpackage>
+    </subpackage>
+
+    <subpackage name="mirror">
+      <allow pkg="org.apache.kafka.clients.consumer" />
+      <allow pkg="org.apache.kafka.connect.source" />
+      <allow pkg="org.apache.kafka.connect.sink" />
+      <allow pkg="org.apache.kafka.connect.storage" />
+      <allow pkg="org.apache.kafka.connect.connector" />
+      <allow pkg="org.apache.kafka.connect.runtime" />
+      <allow pkg="org.apache.kafka.connect.runtime.distributed" />
+      <allow pkg="org.apache.kafka.connect.util" />
+      <allow pkg="org.apache.kafka.connect.converters" />
+      <allow pkg="net.sourceforge.argparse4j" />
+      <!-- for tests -->
+      <allow pkg="org.apache.kafka.connect.integration" />
+      <allow pkg="org.apache.kafka.connect.mirror" />
+    </subpackage>
+
+    <subpackage name="runtime">
+      <allow pkg="org.apache.kafka.connect" />
+      <allow pkg="org.reflections"/>
+      <allow pkg="org.reflections.util"/>
+      <allow pkg="javax.crypto"/>
+
+      <subpackage name="rest">
+        <allow pkg="org.eclipse.jetty" />
+        <allow pkg="javax.ws.rs" />
+        <allow pkg="javax.servlet" />
+        <allow pkg="org.glassfish.jersey" />
+        <allow pkg="com.fasterxml.jackson" />
+        <allow pkg="org.apache.http"/>
+        <subpackage name="resources">
+          <allow pkg="org.apache.log4j" />
+        </subpackage>
+      </subpackage>
+
+      <subpackage name="isolation">
+        <allow pkg="com.fasterxml.jackson" />
+        <allow pkg="org.apache.maven.artifact.versioning" />
+        <allow pkg="javax.tools" />
+      </subpackage>
+
+      <subpackage name="distributed">
+        <allow pkg="javax.ws.rs.core" />
+      </subpackage>
+    </subpackage>
+
+    <subpackage name="cli">
+      <allow pkg="org.apache.kafka.connect.runtime" />
+      <allow pkg="org.apache.kafka.connect.storage" />
+      <allow pkg="org.apache.kafka.connect.util" />
+      <allow pkg="org.apache.kafka.common" />
+      <allow pkg="org.apache.kafka.connect.connector.policy" />
+    </subpackage>
+
+    <subpackage name="storage">
+      <allow pkg="org.apache.kafka.connect" />
+      <allow pkg="org.apache.kafka.common.serialization" />
+      <allow pkg="javax.crypto.spec"/>
+    </subpackage>
+
+    <subpackage name="util">
+      <allow pkg="org.apache.kafka.connect" />
+      <allow pkg="org.reflections.vfs" />
+      <!-- for annotations to avoid code duplication -->
+      <allow pkg="com.fasterxml.jackson.annotation" />
+      <allow pkg="com.fasterxml.jackson.databind" />
+      <subpackage name="clusters">
+        <allow pkg="kafka.server" />
+        <allow pkg="kafka.zk" />
+        <allow pkg="kafka.utils" />
+        <allow class="javax.servlet.http.HttpServletResponse" />
+        <allow class="javax.ws.rs.core.Response" />
+        <allow pkg="com.fasterxml.jackson.core.type" />
+      </subpackage>
+    </subpackage>
+
+    <subpackage name="integration">
+      <allow pkg="org.apache.kafka.connect.util.clusters" />
+      <allow pkg="org.apache.kafka.connect" />
+      <allow pkg="org.apache.kafka.tools" />
+      <allow pkg="javax.ws.rs" />
+    </subpackage>
+
+    <subpackage name="json">
+      <allow pkg="com.fasterxml.jackson" />
+      <allow pkg="org.apache.kafka.common.serialization" />
+      <allow pkg="org.apache.kafka.common.errors" />
+      <allow pkg="org.apache.kafka.connect.storage" />
+    </subpackage>
+
+    <subpackage name="file">
+      <allow pkg="org.apache.kafka.connect" />
+      <allow pkg="org.apache.kafka.clients.consumer" />
+      <!-- for tests -->
+      <allow pkg="org.easymock" />
+      <allow pkg="org.powermock" />
+    </subpackage>
+
+    <subpackage name="tools">
+      <allow pkg="org.apache.kafka.connect" />
+      <allow pkg="org.apache.kafka.tools" />
+      <allow pkg="com.fasterxml.jackson" />
+    </subpackage>
+
+    <subpackage name="transforms">
+      <allow class="org.apache.kafka.connect.connector.ConnectRecord" />
+      <allow class="org.apache.kafka.connect.source.SourceRecord" />
+      <allow class="org.apache.kafka.connect.sink.SinkRecord" />
+      <allow pkg="org.apache.kafka.connect.transforms.util" />
+    </subpackage>
+  </subpackage>
+
+</import-control>

checkstyle/java.header

@@ -0,0 +1,16 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */

checkstyle/suppressions.xml

@@ -0,0 +1,265 @@
+
+
+<!DOCTYPE suppressions PUBLIC
+        "-//Puppy Crawl//DTD Suppressions 1.1//EN"
+        "http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
+
+<suppressions>
+
+    <!-- Note that [/\\] must be used as the path separator for cross-platform support -->
+
+    <!-- Generator -->
+    <suppress checks="CyclomaticComplexity|BooleanExpressionComplexity"
+              files="(SchemaGenerator|MessageDataGenerator|FieldSpec).java"/>
+    <suppress checks="NPathComplexity"
+              files="(MessageDataGenerator|FieldSpec).java"/>
+    <suppress checks="JavaNCSS"
+              files="(ApiMessageType).java|MessageDataGenerator.java"/>
+    <suppress checks="MethodLength"
+              files="MessageDataGenerator.java"/>
+
+    <!-- Clients -->
+    <suppress checks="ClassFanOutComplexity"
+              files="(Fetcher|Sender|SenderTest|ConsumerCoordinator|KafkaConsumer|KafkaProducer|Utils|TransactionManager|TransactionManagerTest|KafkaAdminClient|NetworkClient|Admin).java"/>
+    <suppress checks="ClassFanOutComplexity"
+              files="(SaslServerAuthenticator|SaslAuthenticatorTest).java"/>
+    <suppress checks="ClassFanOutComplexity"
+              files="Errors.java"/>
+    <suppress checks="ClassFanOutComplexity"
+              files="Utils.java"/>
+    <suppress checks="ClassFanOutComplexity"
+              files="AbstractRequest.java"/>
+    <suppress checks="ClassFanOutComplexity"
+              files="AbstractResponse.java"/>
+
+    <suppress checks="MethodLength"
+              files="KerberosLogin.java|RequestResponseTest.java|ConnectMetricsRegistry.java|KafkaConsumer.java"/>
+
+    <suppress checks="ParameterNumber"
+              files="NetworkClient.java|FieldSpec.java"/>
+    <suppress checks="ParameterNumber"
+              files="KafkaConsumer.java"/>
+    <suppress checks="ParameterNumber"
+              files="Fetcher.java"/>
+    <suppress checks="ParameterNumber"
+              files="Sender.java"/>
+    <suppress checks="ParameterNumber"
+              files="ConfigDef.java"/>
+    <suppress checks="ParameterNumber"
+              files="DefaultRecordBatch.java"/>
+    <suppress checks="ParameterNumber"
+              files="Sender.java"/>
+
+    <suppress checks="ClassDataAbstractionCoupling"
+              files="(KafkaConsumer|ConsumerCoordinator|Fetcher|KafkaProducer|AbstractRequest|AbstractResponse|TransactionManager|Admin|KafkaAdminClient).java"/>
+    <suppress checks="ClassDataAbstractionCoupling"
+              files="(Errors|SaslAuthenticatorTest|AgentTest|CoordinatorTest).java"/>
+
+    <suppress checks="BooleanExpressionComplexity"
+              files="(Utils|Topic|KafkaLZ4BlockOutputStream|AclData|JoinGroupRequest).java"/>
+
+    <suppress checks="CyclomaticComplexity"
+              files="(ConsumerCoordinator|Fetcher|Sender|KafkaProducer|BufferPool|ConfigDef|RecordAccumulator|KerberosLogin|AbstractRequest|AbstractResponse|Selector|SslFactory|SslTransportLayer|SaslClientAuthenticator|SaslClientCallbackHandler|SaslServerAuthenticator|AbstractCoordinator|TransactionManager|AbstractStickyAssignor).java"/>
+
+    <suppress checks="JavaNCSS"
+              files="(AbstractRequest|KerberosLogin|WorkerSinkTaskTest|TransactionManagerTest|SenderTest|KafkaAdminClient|ConsumerCoordinatorTest).java"/>
+
+    <suppress checks="NPathComplexity"
+              files="(ConsumerCoordinator|BufferPool|Fetcher|MetricName|Node|ConfigDef|RecordBatch|SslFactory|SslTransportLayer|MetadataResponse|KerberosLogin|Selector|Sender|Serdes|TokenInformation|Agent|Values|PluginUtils|MiniTrogdorCluster|TasksRequest|KafkaProducer|AbstractStickyAssignor).java"/>
+
+    <suppress checks="(JavaNCSS|CyclomaticComplexity|MethodLength)"
+              files="CoordinatorClient.java"/>
+    <suppress checks="(UnnecessaryParentheses|BooleanExpressionComplexity|CyclomaticComplexity|WhitespaceAfter|LocalVariableName)"
+              files="Murmur3.java"/>
+
+    <suppress checks="(NPathComplexity|ClassFanOutComplexity|CyclomaticComplexity|ClassDataAbstractionCoupling|LocalVariableName|MemberName|ParameterName|MethodLength|JavaNCSS)"
+            files="clients[\\/]src[\\/](generated|generated-test)[\\/].+.java$"/>
+
+    <suppress checks="NPathComplexity"
+            files="MessageTest.java"/>
+
+    <!-- clients tests -->
+    <suppress checks="ClassDataAbstractionCoupling"
+              files="(Sender|Fetcher|KafkaConsumer|Metrics|RequestResponse|TransactionManager|KafkaAdminClient|Message|KafkaProducer)Test.java"/>
+
+    <suppress checks="ClassFanOutComplexity"
+              files="(ConsumerCoordinator|KafkaConsumer|RequestResponse|Fetcher|KafkaAdminClient|Message|KafkaProducer)Test.java"/>
+
+    <suppress checks="ClassFanOutComplexity"
+              files="MockAdminClient.java"/>
+
+    <suppress checks="JavaNCSS"
+              files="RequestResponseTest.java|FetcherTest.java"/>
+
+    <suppress checks="NPathComplexity"
+              files="MemoryRecordsTest|MetricsTest"/>
+
+    <suppress checks="(WhitespaceAround|LocalVariableName|ImportControl|AvoidStarImport)"
+              files="Murmur3Test.java"/>
+
+    <!-- Connect -->
+    <suppress checks="ClassFanOutComplexity"
+              files="DistributedHerder(|Test).java"/>
+    <suppress checks="ClassFanOutComplexity"
+              files="Worker.java"/>
+    <suppress checks="MethodLength"
+              files="(KafkaConfigBackingStore|IncrementalCooperativeAssignor|RequestResponseTest|WorkerSinkTaskTest).java"/>
+
+    <suppress checks="ParameterNumber"
+              files="Worker(SinkTask|SourceTask|Coordinator).java"/>
+    <suppress checks="ParameterNumber"
+              files="ConfigKeyInfo.java"/>
+
+    <suppress checks="ClassDataAbstractionCoupling"
+              files="(RestServer|AbstractHerder|DistributedHerder).java"/>
+
+    <suppress checks="BooleanExpressionComplexity"
+              files="JsonConverter.java"/>
+
+    <suppress checks="CyclomaticComplexity"
+              files="ConnectRecord.java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="JsonConverter.java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="FileStreamSourceTask.java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="DistributedHerder.java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="KafkaConfigBackingStore.java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="(Values|ConnectHeader|ConnectHeaders).java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="RocksDBGenericOptionsToDbOptionsColumnFamilyOptionsAdapterTest.java"/>
+
+    <suppress checks="JavaNCSS"
+              files="KafkaConfigBackingStore.java"/>
+    <suppress checks="JavaNCSS"
+              files="Values.java"/>
+
+    <suppress checks="NPathComplexity"
+              files="(DistributedHerder|RestClient|JsonConverter|KafkaConfigBackingStore|FileStreamSourceTask).java"/>
+
+    <suppress checks="MethodLength"
+              files="Values.java"/>
+
+    <!-- connect tests-->
+    <suppress checks="ClassDataAbstractionCoupling"
+              files="(DistributedHerder|KafkaBasedLog)Test.java"/>
+
+    <suppress checks="ClassFanOutComplexity"
+              files="(WorkerSinkTask|WorkerSourceTask)Test.java"/>
+
+    <!-- Streams -->
+    <suppress checks="ClassFanOutComplexity"
+              files="(TopologyBuilder|KafkaStreams|KStreamImpl|KTableImpl|StreamThread|StreamTask).java"/>
+
+    <suppress checks="MethodLength"
+              files="(KTableImpl|StreamsPartitionAssignor.java)"/>
+
+    <suppress checks="ParameterNumber"
+              files="StreamTask.java"/>
+    <suppress checks="ParameterNumber"
+              files="RocksDBWindowStoreSupplier.java"/>
+
+    <suppress checks="ClassDataAbstractionCoupling"
+              files="(TopologyBuilder|KStreamImpl|StreamsPartitionAssignor|KafkaStreams|KTableImpl).java"/>
+
+    <suppress checks="CyclomaticComplexity"
+              files="TopologyBuilder.java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="StreamsPartitionAssignor.java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="StreamThread.java"/>
+
+    <suppress checks="JavaNCSS"
+              files="StreamsPartitionAssignor.java"/>
+
+    <suppress checks="NPathComplexity"
+              files="(AssignorConfiguration|InternalTopologyBuilder|KafkaStreams|ProcessorStateManager|StreamsPartitionAssignor|StreamThread|TaskManager).java"/>
+
+    <suppress checks="(FinalLocalVariable|UnnecessaryParentheses|BooleanExpressionComplexity|CyclomaticComplexity|WhitespaceAfter|LocalVariableName)"
+              files="Murmur3.java"/>
+
+    <!-- suppress FinalLocalVariable outside of the streams package. -->
+    <suppress checks="FinalLocalVariable"
+              files="^(?!.*[\\/]org[\\/]apache[\\/]kafka[\\/]streams[\\/].*$)"/>
+
+    <!-- generated code -->
+    <suppress checks="(NPathComplexity|ClassFanOutComplexity|CyclomaticComplexity|ClassDataAbstractionCoupling|FinalLocalVariable|LocalVariableName|MemberName|ParameterName|MethodLength|JavaNCSS)"
+              files="streams[\\/]src[\\/](generated|generated-test)[\\/].+.java$"/>
+
+
+    <!-- Streams tests -->
+    <suppress checks="ClassFanOutComplexity"
+              files="(StreamThreadTest|StreamTaskTest|ProcessorTopologyTestDriver).java"/>
+
+    <suppress checks="MethodLength"
+              files="KStreamKTableJoinIntegrationTest.java"/>
+    <suppress checks="MethodLength"
+              files="KStreamKStreamJoinTest.java"/>
+    <suppress checks="MethodLength"
+              files="KStreamWindowAggregateTest.java"/>
+    <suppress checks="MethodLength"
+              files="RocksDBWindowStoreTest.java"/>
+
+    <suppress checks="MemberName"
+              files="StreamsPartitionAssignorTest.java"/>
+
+    <suppress checks="ClassDataAbstractionCoupling"
+              files=".*[/\\]streams[/\\].*test[/\\].*.java"/>
+
+    <suppress checks="BooleanExpressionComplexity"
+              files="SmokeTestDriver.java"/>
+
+    <suppress checks="CyclomaticComplexity"
+              files="KStreamKStreamJoinTest.java|KTableKTableForeignKeyJoinIntegrationTest.java"/>
+    <suppress checks="CyclomaticComplexity"
+              files="RelationalSmokeTest.java|SmokeTestDriver.java"/>
+
+    <suppress checks="JavaNCSS"
+              files="KStreamKStreamJoinTest.java"/>
+    <suppress checks="JavaNCSS"
+              files="SmokeTestDriver.java"/>
+
+    <suppress checks="NPathComplexity"
+              files="EosTestDriver|KStreamKStreamJoinTest.java|RelationalSmokeTest.java|SmokeTestDriver.java|KStreamKStreamLeftJoinTest.java|KTableKTableForeignKeyJoinIntegrationTest.java"/>
+
+    <suppress checks="(FinalLocalVariable|WhitespaceAround|LocalVariableName|ImportControl|AvoidStarImport)"
+              files="Murmur3Test.java"/>
+
+
+    <!-- Streams Test-Utils -->
+    <suppress checks="ClassFanOutComplexity"
+              files="TopologyTestDriver.java"/>
+    <suppress checks="ClassDataAbstractionCoupling"
+              files="TopologyTestDriver.java"/>
+
+    <!-- Tools -->
+    <suppress checks="ClassDataAbstractionCoupling"
+              files="VerifiableConsumer.java"/>
+
+    <suppress checks="CyclomaticComplexity"
+              files="(StreamsResetter|ProducerPerformance|Agent).java"/>
+    <suppress checks="BooleanExpressionComplexity"
+              files="StreamsResetter.java"/>
+    <suppress checks="NPathComplexity"
+              files="(ProducerPerformance|StreamsResetter|Agent|TransactionalMessageCopier).java"/>
+    <suppress checks="ImportControl"
+              files="SignalLogger.java"/>
+    <suppress checks="IllegalImport"
+              files="SignalLogger.java"/>
+    <suppress checks="ParameterNumber"
+              files="ProduceBenchSpec.java"/>
+    <suppress checks="ParameterNumber"
+              files="SustainedConnectionSpec.java"/>
+
+    <!-- Log4J-Appender -->
+    <suppress checks="CyclomaticComplexity"
+              files="KafkaLog4jAppender.java"/>
+
+    <suppress checks="NPathComplexity"
+              files="KafkaLog4jAppender.java"/>
+    <suppress checks="JavaNCSS"
+              files="RequestResponseTest.java"/>
+
+</suppressions>