Add MethodParamPad, OneStatementPerLine and EmptyStatement Checkstyle checks (#5272)

benchmarks/src/main/java/io/druid/benchmark/IncrementalIndexRowTypeBenchmark.java

@@ -148,7 +148,6 @@ public class IncrementalIndexRowTypeBenchmark
   @Setup(Level.Iteration)
   public void setup2() throws IOException
   {
-    ;
     incIndex = makeIncIndex();
     incFloatIndex = makeIncIndex();
     incStrIndex = makeIncIndex();

codestyle/checkstyle-suppressions.xml

@@ -51,6 +51,8 @@
   <suppress checks="Indentation" files="[\\/]target[\\/]generated-test-sources[\\/]" />
   <suppress checks="Indentation" files="ProtoTestEventWrapper.java" />
   
+  <suppress checks="OneStatementPerLine" files="[\\/]target[\\/]generated-test-sources[\\/]" />
+
   <!-- extendedset is a fork of Alessandro Colantonio's CONCISE (COmpressed 'N' Composable Integer SEt) repository and licensed to Metamarkets under a CLA is not true. -->
   <suppress checks="Header" files="[\\/]extendedset[\\/]" />
 </suppressions>

codestyle/checkstyle.xml

@@ -99,6 +99,12 @@
       <property name="caseIndent" value="2"/>
     </module>
 
+    <module name="MethodParamPad">
+      <property name="allowLineBreaks" value="true"/>
+    </module>
+    <module name="OneStatementPerLine"/>
+    <module name="EmptyStatement"/>
+
     <module name="ModifierOrder" />
 
     <module name="Regexp">

integration-tests/src/main/java/io/druid/testing/clients/EventReceiverFirehoseTestClient.java

@@ -154,7 +154,7 @@ public class EventReceiverFirehoseTestClient
                            ? MediaType.APPLICATION_JSON
                            : SmileMediaTypes.APPLICATION_JACKSON_SMILE;
         totalEventsPosted += postEvents(events, mapper, mediaType);
-        ;
+
         expectedEventsPosted += events.size();
         events = new ArrayList<>();
       }

integration-tests/src/main/java/org/testng/DruidTestRunnerFactory.java

@@ -87,7 +87,7 @@ public class DruidTestRunnerFactory implements ITestRunnerFactory
       Injector injector = DruidTestModuleFactory.getInjector();
       IntegrationTestingConfig config = injector.getInstance(IntegrationTestingConfig.class);
       HttpClient client = injector.getInstance(Key.get(HttpClient.class, TestClient.class));
-      ;
+
       waitUntilInstanceReady(client, config.getCoordinatorUrl());
       waitUntilInstanceReady(client, config.getIndexerUrl());
       waitUntilInstanceReady(client, config.getBrokerUrl());

processing/src/main/java/io/druid/query/TimewarpOperator.java

@@ -152,7 +152,7 @@ public class TimewarpOperator<T> implements PostProcessingOperator<T>
     if (startOffset < 0) {
       startOffset += periodMillis;
     }
-    ;
+
     start -= startOffset;
 
     // tOffset is the offset time t within the last period

server/src/test/java/io/druid/client/indexing/ClientMergeQueryTest.java

@@ -35,11 +35,12 @@ public class ClientMergeQueryTest
   private static final String DATA_SOURCE = "data_source";
   public static final DateTime START = DateTimes.nowUtc();
   private static final Interval INTERVAL = new Interval(START, START.plus(1));
-  private static final DataSegment DATA_SEGMENT = new DataSegment(DATA_SOURCE, INTERVAL, START.toString(), null,
+  private static final DataSegment DATA_SEGMENT =
-      null, null, null, 0, 0);
+      new DataSegment(DATA_SOURCE, INTERVAL, START.toString(), null, null, null, null, 0, 0);
   private static final List<DataSegment> SEGMENT_LIST = Lists.newArrayList(DATA_SEGMENT);
   private static final List<AggregatorFactory> AGGREGATOR_LIST = Lists.newArrayList();
-  private static final ClientMergeQuery CLIENT_MERGE_QUERY = new ClientMergeQuery(DATA_SOURCE, SEGMENT_LIST, AGGREGATOR_LIST);;
+  private static final ClientMergeQuery CLIENT_MERGE_QUERY =
+      new ClientMergeQuery(DATA_SOURCE, SEGMENT_LIST, AGGREGATOR_LIST);
 
   @Test
   public void testGetType()

server/src/test/java/io/druid/server/lookup/cache/LookupNodeDiscoveryTest.java

@@ -74,7 +74,7 @@ public class LookupNodeDiscoveryTest
 
     EasyMock.expect(druidNodeDiscovery.getAllNodes())
             .andReturn(ImmutableSet.of(node1, node2, node3))
-            .anyTimes();;
+            .anyTimes();
 
     EasyMock.replay(druidNodeDiscoveryProvider, druidNodeDiscovery);
 

server/src/test/java/io/druid/server/router/TieredBrokerHostSelectorTest.java

@@ -107,7 +107,7 @@ public class TieredBrokerHostSelectorTest
     };
 
     EasyMock.expect(druidNodeDiscoveryProvider.getForNodeType(DruidNodeDiscoveryProvider.NODE_TYPE_BROKER))
-            .andReturn(druidNodeDiscovery);;
+            .andReturn(druidNodeDiscovery);
 
     EasyMock.replay(druidNodeDiscoveryProvider);
 

services/src/main/java/io/druid/cli/ResetCluster.java

@@ -175,7 +175,7 @@ public class ResetCluster extends GuiceRunnable
       log.info("Deleting all TaskLogs.");
       log.info("===========================================================================");
 
-      TaskLogKiller taskLogKiller = injector.getInstance(TaskLogKiller.class);;
+      TaskLogKiller taskLogKiller = injector.getInstance(TaskLogKiller.class);
       taskLogKiller.killAll();
     }
     catch (Exception ex) {