HDFS-11612. Ozone: Cleanup Checkstyle issues. Contributed by Shashikant Banerjee.

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/cblock/package-info.java

@@ -0,0 +1,22 @@
+/**
+ * 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.
+ */
+package org.apache.hadoop.cblock;
+
+/**
+ This package contains ozone client side libraries.
+ */

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ozone/ksm/helpers/KsmKeyInfo.java

@@ -115,13 +115,13 @@ public Builder setDataSize(long size) {
       return this;
     }
 
-    public Builder setCreationTime(long creationTime) {
+    public Builder setCreationTime(long crTime) {
-      this.creationTime = creationTime;
+      this.creationTime = crTime;
       return this;
     }
 
-    public Builder setModificationTime(long modificationTime) {
+    public Builder setModificationTime(long mTime) {
-      this.modificationTime = modificationTime;
+      this.modificationTime = mTime;
       return this;
     }
 

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ozone/ksm/helpers/KsmVolumeArgs.java

@@ -142,18 +142,18 @@ public static class Builder {
       aclMap = new KsmOzoneAclMap();
     }
 
-    public Builder setAdminName(String adminName) {
+    public Builder setAdminName(String admin) {
-      this.adminName = adminName;
+      this.adminName = admin;
       return this;
     }
 
-    public Builder setOwnerName(String ownerName) {
+    public Builder setOwnerName(String owner) {
-      this.ownerName = ownerName;
+      this.ownerName = owner;
       return this;
     }
 
-    public Builder setVolume(String volume) {
+    public Builder setVolume(String volumeName) {
-      this.volume = volume;
+      this.volume = volumeName;
       return this;
     }
 
@@ -162,8 +162,8 @@ public Builder setCreationTime(long createdOn) {
       return this;
     }
 
-    public Builder setQuotaInBytes(long quotaInBytes) {
+    public Builder setQuotaInBytes(long quota) {
-      this.quotaInBytes = quotaInBytes;
+      this.quotaInBytes = quota;
       return this;
     }
 

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/XceiverClient.java

@@ -123,11 +123,11 @@ public ContainerProtos.ContainerCommandResponseProto sendCommand(
       ContainerProtos.ContainerCommandRequestProto request)
       throws IOException {
     try {
-    if ((channelFuture == null) || (!channelFuture.channel().isActive())) {
+      if ((channelFuture == null) || (!channelFuture.channel().isActive())) {
-      throw new IOException("This channel is not connected.");
+        throw new IOException("This channel is not connected.");
-    }
+      }
-    XceiverClientHandler handler =
+      XceiverClientHandler handler =
-        channelFuture.channel().pipeline().get(XceiverClientHandler.class);
+          channelFuture.channel().pipeline().get(XceiverClientHandler.class);
 
       return handler.sendCommand(request);
     } catch (ExecutionException | InterruptedException e) {
@@ -144,13 +144,13 @@ public ContainerProtos.ContainerCommandResponseProto sendCommand(
    */
   @Override
   public CompletableFuture<ContainerProtos.ContainerCommandResponseProto>
-    sendCommandAsync(ContainerProtos.ContainerCommandRequestProto request)
+      sendCommandAsync(ContainerProtos.ContainerCommandRequestProto request)
       throws IOException, ExecutionException, InterruptedException {
-      if ((channelFuture == null) || (!channelFuture.channel().isActive())) {
+    if ((channelFuture == null) || (!channelFuture.channel().isActive())) {
-        throw new IOException("This channel is not connected.");
+      throw new IOException("This channel is not connected.");
-      }
+    }
-      XceiverClientHandler handler =
+    XceiverClientHandler handler =
-          channelFuture.channel().pipeline().get(XceiverClientHandler.class);
+        channelFuture.channel().pipeline().get(XceiverClientHandler.class);
-      return handler.sendCommandAsync(request);
+    return handler.sendCommandAsync(request);
   }
 }

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/XceiverClientHandler.java

@@ -109,8 +109,8 @@ public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
    * @return -- response
    */
 
-  public ContainerCommandResponseProto
+  public ContainerCommandResponseProto sendCommand(
-    sendCommand(ContainerProtos.ContainerCommandRequestProto request)
+      ContainerProtos.ContainerCommandRequestProto request)
       throws ExecutionException, InterruptedException {
     Future<ContainerCommandResponseProto> future = sendCommandAsync(request);
     return future.get();
@@ -123,11 +123,11 @@ public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
    * @param request - Request to execute
    * @return CompletableFuture
    */
-  public CompletableFuture<ContainerCommandResponseProto>
+  public CompletableFuture<ContainerCommandResponseProto> sendCommandAsync(
-    sendCommandAsync(ContainerProtos.ContainerCommandRequestProto request) {
+      ContainerProtos.ContainerCommandRequestProto request) {
 
     // Throw an exception of request doesn't have traceId
-    if(StringUtils.isEmpty(request.getTraceID())) {
+    if (StringUtils.isEmpty(request.getTraceID())) {
       throw new IllegalArgumentException("Invalid trace ID");
     }
 

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/XceiverClientRatis.java

@@ -20,7 +20,6 @@
 
 import com.google.common.base.Preconditions;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ContainerCommandRequestProto;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ContainerCommandResponseProto;
 import org.apache.ratis.RatisHelper;
@@ -115,8 +114,8 @@ public ContainerCommandResponseProto sendCommand(
    * @throws IOException
    */
   @Override
-  public CompletableFuture<ContainerCommandResponseProto>
+  public CompletableFuture<ContainerCommandResponseProto> sendCommandAsync(
-    sendCommandAsync(ContainerCommandRequestProto request)
+      ContainerCommandRequestProto request)
       throws IOException, ExecutionException, InterruptedException {
     throw new IOException("Not implemented");
   }

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/XceiverClientSpi.java

@@ -103,8 +103,8 @@ public abstract ContainerCommandResponseProto sendCommand(
    * @return Response to the command
    * @throws IOException
    */
-  public abstract CompletableFuture<ContainerCommandResponseProto>
+  public abstract CompletableFuture<ContainerCommandResponseProto> sendCommandAsync(
-    sendCommandAsync(ContainerCommandRequestProto request) throws IOException,
+      ContainerCommandRequestProto request)
-      ExecutionException, InterruptedException;
+      throws IOException, ExecutionException, InterruptedException;
 
 }

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/container/common/helpers/ContainerInfo.java

@@ -82,13 +82,14 @@ public static ContainerInfo fromProtobuf(
     return builder.build();
   }
 
+  /** Builder class for ContainerInfo. */
   public static class Builder {
     private OzoneProtos.LifeCycleState state;
     private Pipeline pipeline;
     private long stateEnterTime;
 
-    public Builder setState(OzoneProtos.LifeCycleState state) {
+    public Builder setState(OzoneProtos.LifeCycleState lifeCycleState) {
-      this.state = state;
+      this.state = lifeCycleState;
       return this;
     }
 

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/storage/ContainerProtocolCalls.java

@@ -188,40 +188,33 @@ public static void writeChunk(XceiverClientSpi xceiverClient, ChunkInfo chunk,
    * @param traceID - Trace ID for logging purpose.
    * @throws IOException
    */
-  public static void writeSmallFile(XceiverClientSpi client, String containerName,
+  public static void writeSmallFile(XceiverClientSpi client,
-      String key, byte[] data, String traceID) throws IOException {
+      String containerName, String key, byte[] data, String traceID)
+      throws IOException {
 
-    KeyData containerKeyData = KeyData
+    KeyData containerKeyData =
-        .newBuilder()
+        KeyData.newBuilder().setContainerName(containerName).setName(key)
-        .setContainerName(containerName)
+            .build();
-        .setName(key).build();
+    PutKeyRequestProto.Builder createKeyRequest =
-    PutKeyRequestProto.Builder createKeyRequest = PutKeyRequestProto
+        PutKeyRequestProto.newBuilder()
-        .newBuilder()
+            .setPipeline(client.getPipeline().getProtobufMessage())
-        .setPipeline(client.getPipeline().getProtobufMessage())
+            .setKeyData(containerKeyData);
-        .setKeyData(containerKeyData);
 
-    KeyValue keyValue = KeyValue.newBuilder()
+    KeyValue keyValue =
-        .setKey("OverWriteRequested").setValue("true").build();
+        KeyValue.newBuilder().setKey("OverWriteRequested").setValue("true")
-    ChunkInfo chunk = ChunkInfo
+            .build();
-        .newBuilder()
+    ChunkInfo chunk =
-        .setChunkName(key + "_chunk")
+        ChunkInfo.newBuilder().setChunkName(key + "_chunk").setOffset(0)
-        .setOffset(0)
+            .setLen(data.length).addMetadata(keyValue).build();
-        .setLen(data.length)
-        .addMetadata(keyValue)
-        .build();
 
-    PutSmallFileRequestProto putSmallFileRequest = PutSmallFileRequestProto
+    PutSmallFileRequestProto putSmallFileRequest =
-        .newBuilder().setChunkInfo(chunk)
+        PutSmallFileRequestProto.newBuilder().setChunkInfo(chunk)
-        .setKey(createKeyRequest)
+            .setKey(createKeyRequest).setData(ByteString.copyFrom(data))
-        .setData(ByteString.copyFrom(data))
+            .build();
-        .build();
 
-    ContainerCommandRequestProto request = ContainerCommandRequestProto
+    ContainerCommandRequestProto request =
-        .newBuilder()
+        ContainerCommandRequestProto.newBuilder().setCmdType(Type.PutSmallFile)
-        .setCmdType(Type.PutSmallFile)
+            .setTraceID(traceID).setPutSmallFile(putSmallFileRequest).build();
-        .setTraceID(traceID)
-        .setPutSmallFile(putSmallFileRequest)
-        .build();
     ContainerCommandResponseProto response = client.sendCommand(request);
     validateContainerResponse(response);
   }

hadoop-hdfs-project/hadoop-hdfs-client/src/test/java/org/apache/hadoop/ozone/TestOzoneAcls.java

@@ -26,10 +26,13 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
+/**
+ * This class is to test acl stoarge and retreival in ozone store.
+ */
 public class TestOzoneAcls {
 
   @Test
-  public void TestACLParse() {
+  public void testAclParse() {
     HashMap<String, Boolean> testMatrix;
     testMatrix = new HashMap<>();
 
@@ -103,7 +106,7 @@ public void TestACLParse() {
   }
 
   @Test
-  public void TestACLValues() {
+  public void testAclValues() {
     OzoneAcl acl = OzoneAcl.parseAcl("user:bilbo:rw");
     assertEquals(acl.getName(), "bilbo");
     assertEquals(acl.getRights(), OzoneAcl.OzoneACLRights.READ_WRITE);

hadoop-hdfs-project/hadoop-hdfs-client/src/test/java/org/apache/hadoop/scm/TestArchive.java

@@ -46,6 +46,7 @@ public class TestArchive {
   private long checksumWrite = 0L;
   private long checksumRead = 0L;
   private long tmp = 0L;
+  private Checksum crc = new Adler32();
 
   @Rule
   public TemporaryFolder folder = new TemporaryFolder();
@@ -53,7 +54,6 @@ public class TestArchive {
   @Rule
   public TemporaryFolder outputFolder = new TemporaryFolder();
 
-  Checksum crc = new Adler32();
 
   @Before
   public void setUp() throws Exception {

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/KeyUtils.java

@@ -23,9 +23,7 @@
 import org.apache.hadoop.scm.container.common.helpers.StorageContainerException;
 import org.apache.hadoop.ozone.container.common.utils.ContainerCache;
 import org.apache.hadoop.utils.MetadataStore;
-import org.apache.hadoop.utils.MetadataStoreBuilder;
 
-import java.io.File;
 import java.io.IOException;
 import java.nio.charset.Charset;
 
@@ -142,8 +140,8 @@ public static KeyData getKeyData(byte[] bytes) throws IOException {
       KeyData data = KeyData.getFromProtoBuf(kd);
       return data;
     } catch (IOException e) {
-      throw new StorageContainerException("Failed to parse key data from the bytes array.",
+      throw new StorageContainerException("Failed to parse key data from the" +
-          NO_SUCH_KEY);
+              " bytes array.", NO_SUCH_KEY);
     }
   }
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/utils/package-info.java

@@ -0,0 +1,18 @@
+/**
+ * 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.
+ */
+package org.apache.hadoop.ozone.container.common.utils;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/block/BlockManagerImpl.java

@@ -290,7 +290,8 @@ private List <String> filterContainers(OzoneProtos.LifeCycleState state,
 
   private BlockContainerInfo getContainer(OzoneProtos.LifeCycleState state,
       String name) {
-    Map<String, BlockContainerInfo> containersByState = this.containers.get(state);
+    Map<String, BlockContainerInfo> containersByState =
+        this.containers.get(state);
     return containersByState.get(name);
   }
 
@@ -318,15 +319,15 @@ private void updateContainer(OzoneProtos.LifeCycleState oldState, String name,
   private void refreshContainers() {
     Map<String, BlockContainerInfo> containersByState =
         this.containers.get(OzoneProtos.LifeCycleState.CREATING);
-    for (String containerName: containersByState.keySet()) {
+    for (String containerName : containersByState.keySet()) {
       try {
         ContainerInfo containerInfo =
             containerManager.getContainer(containerName);
         if (containerInfo == null) {
           // TODO: clean up containers that has been deleted on SCM but
           // TODO: still in ALLOCATED state in block manager.
-          LOG.debug("Container {} allocated by block service" +
+          LOG.debug("Container {} allocated by block service"
-              "can't be found in SCM", containerName);
+              + "can't be found in SCM", containerName);
           continue;
         }
         if (containerInfo.getState() == OzoneProtos.LifeCycleState.OPEN) {
@@ -340,7 +341,7 @@ private void refreshContainers() {
         LOG.debug("Failed to get container info for: {}", containerName);
       }
     }
-   }
+  }
 
   /**
    * Allocates a new block for a given size.
@@ -356,8 +357,7 @@ private void refreshContainers() {
   public AllocatedBlock allocateBlock(final long size) throws IOException {
     boolean createContainer = false;
     if (size < 0 || size > containerSize) {
-      throw new SCMException("Unsupported block size",
+      throw new SCMException("Unsupported block size", INVALID_BLOCK_SIZE);
-          INVALID_BLOCK_SIZE);
     }
     if (!nodeManager.isOutOfNodeChillMode()) {
       throw new SCMException("Unable to create block while in chill mode",
@@ -370,8 +370,8 @@ public AllocatedBlock allocateBlock(final long size) throws IOException {
       List<String> candidates;
       candidates = filterContainers(OzoneProtos.LifeCycleState.OPEN, size);
       if (candidates.size() == 0) {
-        candidates = filterContainers(OzoneProtos.LifeCycleState.ALLOCATED,
+        candidates =
-            size);
+            filterContainers(OzoneProtos.LifeCycleState.ALLOCATED, size);
         if (candidates.size() == 0) {
           try {
             candidates = allocateContainers(containerProvisionBatchSize);
@@ -383,8 +383,9 @@ public AllocatedBlock allocateBlock(final long size) throws IOException {
         }
         // now we should have some candidates in ALLOCATE state
         if (candidates.size() == 0) {
-          throw new SCMException("Fail to find any container to allocate block "
+          throw new SCMException(
-              + "of size " + size + ".", FAILED_TO_FIND_CONTAINER_WITH_SPACE);
+              "Fail to find any container to allocate block " + "of size "
+                  + size + ".", FAILED_TO_FIND_CONTAINER_WITH_SPACE);
         }
       }
 
@@ -416,8 +417,8 @@ public AllocatedBlock allocateBlock(final long size) throws IOException {
       // TODO: make block key easier to debug (e.g., seq no)
       // Allocate key for the block
       String blockKey = UUID.randomUUID().toString();
-      AllocatedBlock.Builder abb = new AllocatedBlock.Builder()
+      AllocatedBlock.Builder abb = new AllocatedBlock.Builder().setKey(blockKey)
-          .setKey(blockKey).setPipeline(containerInfo.getPipeline())
+          .setPipeline(containerInfo.getPipeline())
           .setShouldCreateContainer(createContainer);
       if (containerInfo.getPipeline().getMachines().size() > 0) {
         blockStore.put(DFSUtil.string2Bytes(blockKey),
@@ -428,12 +429,12 @@ public AllocatedBlock allocateBlock(final long size) throws IOException {
             getContainer(containerInfo.getState(), containerName);
         Preconditions.checkNotNull(containerInfoUpdate);
         containerInfoUpdate.addAllocated(size);
-        containerStore.put(DFSUtil.string2Bytes(containerName),
+        containerStore.put(DFSUtil.string2Bytes(containerName), DFSUtil
-            DFSUtil.string2Bytes(Long.toString(containerInfoUpdate.getAllocated())));
+            .string2Bytes(Long.toString(containerInfoUpdate.getAllocated())));
         if (createContainer) {
-          OzoneProtos.LifeCycleState newState =
+          OzoneProtos.LifeCycleState newState = containerManager
-              containerManager.updateContainerState(containerName,
+              .updateContainerState(containerName,
-              OzoneProtos.LifeCycleEvent.BEGIN_CREATE);
+                  OzoneProtos.LifeCycleEvent.BEGIN_CREATE);
           updateContainer(containerInfo.getState(), containerName, newState);
         }
         return abb.build();
@@ -457,17 +458,19 @@ public Pipeline getBlock(final String key) throws IOException {
     try {
       byte[] containerBytes = blockStore.get(DFSUtil.string2Bytes(key));
       if (containerBytes == null) {
-        throw new SCMException("Specified block key does not exist. key : " +
+        throw new SCMException(
-            key, FAILED_TO_FIND_BLOCK);
+            "Specified block key does not exist. key : " + key,
+            FAILED_TO_FIND_BLOCK);
       }
       String containerName = DFSUtil.bytes2String(containerBytes);
-      ContainerInfo containerInfo = containerManager.getContainer(
+      ContainerInfo containerInfo =
-          containerName);
+          containerManager.getContainer(containerName);
       if (containerInfo == null) {
-          LOG.debug("Container {} allocated by block service" +
+        LOG.debug(
-              "can't be found in SCM", containerName);
+            "Container {} allocated by block service" + "can't be found in SCM",
-          throw new SCMException("Unable to find container for the block",
+            containerName);
-              SCMException.ResultCodes.FAILED_TO_FIND_CONTAINER);
+        throw new SCMException("Unable to find container for the block",
+            SCMException.ResultCodes.FAILED_TO_FIND_CONTAINER);
       }
       return containerInfo.getPipeline();
     } finally {

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/container/ContainerMapping.java

@@ -158,15 +158,17 @@ private void initializeStateMachine() {
    * {@inheritDoc}
    */
   @Override
-  public ContainerInfo getContainer(final String containerName) throws IOException {
+  public ContainerInfo getContainer(final String containerName)
+      throws IOException {
     ContainerInfo containerInfo;
     lock.lock();
     try {
       byte[] containerBytes =
           containerStore.get(containerName.getBytes(encoding));
       if (containerBytes == null) {
-        throw new SCMException("Specified key does not exist. key : " +
+        throw new SCMException(
-            containerName, SCMException.ResultCodes.FAILED_TO_FIND_CONTAINER);
+            "Specified key does not exist. key : " + containerName,
+            SCMException.ResultCodes.FAILED_TO_FIND_CONTAINER);
       }
       containerInfo = ContainerInfo.fromProtobuf(
           OzoneProtos.SCMContainerInfo.PARSER.parseFrom(containerBytes));
@@ -305,11 +307,11 @@ public OzoneProtos.LifeCycleState updateContainerState(String containerName,
     lock.lock();
     try {
       byte[] dbKey = containerName.getBytes(encoding);
-      byte[] containerBytes =
+      byte[] containerBytes = containerStore.get(dbKey);
-          containerStore.get(dbKey);
+      if (containerBytes == null) {
-      if(containerBytes == null) {
+        throw new SCMException(
-        throw new SCMException("Failed to update container state"
+            "Failed to update container state" + containerName
-            + containerName + ", reason : container doesn't exist.",
+                + ", reason : container doesn't exist.",
             SCMException.ResultCodes.FAILED_TO_FIND_CONTAINER);
       }
       containerInfo = ContainerInfo.fromProtobuf(
@@ -317,11 +319,12 @@ public OzoneProtos.LifeCycleState updateContainerState(String containerName,
 
       OzoneProtos.LifeCycleState newState;
       try {
-         newState = stateMachine.getNextState(containerInfo.getState(), event);
+        newState = stateMachine.getNextState(containerInfo.getState(), event);
       } catch (InvalidStateTransitionException ex) {
-        throw new SCMException("Failed to update container state"
+        throw new SCMException(
-            + containerName + ", reason : invalid state transition from state: "
+            "Failed to update container state" + containerName
-            + containerInfo.getState() + " upon event: " + event + ".",
+                + ", reason : invalid state transition from state: "
+                + containerInfo.getState() + " upon event: " + event + ".",
             SCMException.ResultCodes.FAILED_TO_CHANGE_CONTAINER_STATE);
       }
       containerInfo.setState(newState);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/exceptions/package-info.java

@@ -0,0 +1,22 @@
+/**
+ * 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.
+ */
+package org.apache.hadoop.ozone.web.exceptions;
+
+/**
+ This package contains ozone client side libraries.
+ */

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/handlers/package-info.java

@@ -0,0 +1,22 @@
+/**
+ * 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.
+ */
+package org.apache.hadoop.ozone.web.handlers;
+
+/**
+ This package contains ozone client side libraries.
+ */

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/interfaces/Keys.java

@@ -62,14 +62,9 @@ public interface Keys {
   @PUT
   @Consumes(MediaType.WILDCARD)
   Response putKey(@PathParam("volume") String volume,
-                  @PathParam("bucket") String bucket,
+      @PathParam("bucket") String bucket, @PathParam("keys") String keys,
-                  @PathParam("keys") String keys,
+      InputStream is, @Context Request req, @Context UriInfo info,
-                  InputStream is,
+      @Context HttpHeaders headers) throws OzoneException;
-                  @Context Request req,
-                  @Context UriInfo info,
-                  @Context HttpHeaders headers)
-    throws OzoneException;
-
 
   /**
    * Gets the Key if it exists.
@@ -88,14 +83,10 @@ Response putKey(@PathParam("volume") String volume,
    */
   @GET
   Response getKey(@PathParam("volume") String volume,
-                  @PathParam("bucket") String bucket,
+      @PathParam("bucket") String bucket, @PathParam("keys") String keys,
-                  @PathParam("keys") String keys,
+      @QueryParam(Header.OZONE_LIST_QUERY_TAG) String info,
-                  @QueryParam(Header.OZONE_LIST_QUERY_TAG)
+      @Context Request req, @Context UriInfo uriInfo,
-                  String info,
+      @Context HttpHeaders headers) throws OzoneException;
-                  @Context Request req,
-                  @Context UriInfo uriInfo,
-                  @Context HttpHeaders headers)
-    throws OzoneException;
 
   /**
    * Deletes an existing key.
@@ -112,11 +103,8 @@ Response getKey(@PathParam("volume") String volume,
    */
   @DELETE
   Response deleteKey(@PathParam("volume") String volume,
-                     @PathParam("bucket") String bucket,
+      @PathParam("bucket") String bucket, @PathParam("keys") String keys,
-                     @PathParam("keys") String keys,
+      @Context Request req, @Context UriInfo info, @Context HttpHeaders headers)
-                     @Context Request req,
+      throws OzoneException;
-                     @Context UriInfo info,
-                     @Context HttpHeaders headers)
-    throws OzoneException;
 }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/interfaces/Volume.java

@@ -65,13 +65,10 @@ public interface Volume {
 
   @POST
   Response createVolume(@PathParam("volume") String volume,
-                        @DefaultValue(Header.OZONE_QUOTA_UNDEFINED)
+      @DefaultValue(Header.OZONE_QUOTA_UNDEFINED)
-                        @QueryParam(Header.OZONE_QUOTA_QUERY_TAG) String quota,
+      @QueryParam(Header.OZONE_QUOTA_QUERY_TAG) String quota,
-                        @Context Request req,
+      @Context Request req, @Context UriInfo uriInfo,
-                        @Context UriInfo uriInfo,
+      @Context HttpHeaders headers) throws OzoneException;
-                        @Context HttpHeaders headers)
-    throws OzoneException;
-
 
   /**
    * Updates a Volume owned by the user.
@@ -93,13 +90,10 @@ Response createVolume(@PathParam("volume") String volume,
    */
   @PUT
   Response updateVolume(@PathParam("volume") String volume,
-                        @DefaultValue(Header.OZONE_QUOTA_UNDEFINED)
+      @DefaultValue(Header.OZONE_QUOTA_UNDEFINED)
-                        @QueryParam(Header.OZONE_QUOTA_QUERY_TAG) String quota,
+      @QueryParam(Header.OZONE_QUOTA_QUERY_TAG) String quota,
-                        @Context Request req,
+      @Context Request req, @Context UriInfo uriInfo,
-                        @Context UriInfo uriInfo,
+      @Context HttpHeaders headers) throws OzoneException;
-                        @Context HttpHeaders headers)
-    throws OzoneException;
-
 
   /**
    * Deletes a Volume if it is empty.
@@ -112,10 +106,8 @@ Response updateVolume(@PathParam("volume") String volume,
    */
   @DELETE
   Response deleteVolume(@PathParam("volume") String volume,
-                        @Context Request req,
+      @Context Request req, @Context UriInfo uriInfo,
-                        @Context UriInfo uriInfo,
+      @Context HttpHeaders headers) throws OzoneException;
-                        @Context HttpHeaders headers)
-    throws OzoneException;
 
   /**
    * Returns Volume info. This API can be invoked either
@@ -131,21 +123,14 @@ Response deleteVolume(@PathParam("volume") String volume,
    */
   @GET
   Response getVolumeInfo(@PathParam("volume") String volume,
-                         @DefaultValue(Header.OZONE_LIST_QUERY_BUCKET)
+      @DefaultValue(Header.OZONE_LIST_QUERY_BUCKET)
-                         @QueryParam(Header.OZONE_LIST_QUERY_TAG)
+      @QueryParam(Header.OZONE_LIST_QUERY_TAG) String info,
-                         String info,
+      @QueryParam(Header.OZONE_LIST_QUERY_PREFIX) String prefix,
-                         @QueryParam(Header.OZONE_LIST_QUERY_PREFIX)
+      @DefaultValue(Header.OZONE_DEFAULT_LIST_SIZE)
-                         String prefix,
+      @QueryParam(Header.OZONE_LIST_QUERY_MAXKEYS) int keys,
-                         @DefaultValue(Header.OZONE_DEFAULT_LIST_SIZE)
+      @QueryParam(Header.OZONE_LIST_QUERY_PREVKEY) String prevKey,
-                         @QueryParam(Header.OZONE_LIST_QUERY_MAXKEYS)
+      @QueryParam(Header.OZONE_LIST_QUERY_ROOTSCAN) boolean rootScan,
-                         int keys,
+      @Context Request req, @Context UriInfo uriInfo,
-                         @QueryParam(Header.OZONE_LIST_QUERY_PREVKEY)
+      @Context HttpHeaders headers) throws OzoneException;
-                         String prevKey,
-                         @QueryParam(Header.OZONE_LIST_QUERY_ROOTSCAN)
-                         boolean rootScan,
-                         @Context Request req,
-                         @Context UriInfo uriInfo,
-                         @Context HttpHeaders headers)
-    throws OzoneException;
 
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/interfaces/package-info.java

@@ -0,0 +1,22 @@
+/**
+ * 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.
+ */
+package org.apache.hadoop.ozone.web.interfaces;
+
+/**
+ This package contains ozone client side libraries.
+ */

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/localstorage/package-info.java

@@ -0,0 +1,18 @@
+/**
+ * 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.
+ */
+package org.apache.hadoop.ozone.web.localstorage;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/messages/package-info.java

@@ -0,0 +1,18 @@
+/**
+ * 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.
+ */
+package org.apache.hadoop.ozone.web.messages;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/netty/CloseableCleanupListener.java

@@ -35,7 +35,7 @@ final class CloseableCleanupListener implements ChannelFutureListener {
    *
    * @param closeables any number of closeable resources
    */
-  public CloseableCleanupListener(Closeable... closeables) {
+  CloseableCleanupListener(Closeable... closeables) {
     this.closeables = closeables;
   }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/netty/ObjectStoreJerseyContainer.java

@@ -213,7 +213,7 @@ private final class RequestRunner implements Runnable,
      * @param respOut output stream for writing response body
      * @param latch for coordinating asynchronous return of HTTP response
      */
-    public RequestRunner(HttpRequest nettyReq, InputStream reqIn,
+    RequestRunner(HttpRequest nettyReq, InputStream reqIn,
                          OutputStream respOut, CountDownLatch latch) {
       this.latch = latch;
       this.nettyReq = nettyReq;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/ozShell/bucket/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+/**
+ * Netty-based HTTP server implementation for Ozone.
+ */
+package org.apache.hadoop.ozone.web.ozShell.bucket;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/ozShell/keys/GetKeyHandler.java

@@ -20,9 +20,7 @@
 
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.codec.digest.DigestUtils;
-import org.apache.hadoop.ozone.web.client.OzoneBucket;
 import org.apache.hadoop.ozone.web.client.OzoneRestClientException;
-import org.apache.hadoop.ozone.web.client.OzoneVolume;
 import org.apache.hadoop.ozone.web.exceptions.OzoneException;
 import org.apache.hadoop.ozone.web.ozShell.Handler;
 import org.apache.hadoop.ozone.web.ozShell.Shell;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/ozShell/keys/PutKeyHandler.java

@@ -20,9 +20,7 @@
 
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.codec.digest.DigestUtils;
-import org.apache.hadoop.ozone.web.client.OzoneBucket;
 import org.apache.hadoop.ozone.web.client.OzoneRestClientException;
-import org.apache.hadoop.ozone.web.client.OzoneVolume;
 import org.apache.hadoop.ozone.web.exceptions.OzoneException;
 import org.apache.hadoop.ozone.web.ozShell.Handler;
 import org.apache.hadoop.ozone.web.ozShell.Shell;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/ozShell/keys/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+/**
+ * Netty-based HTTP server implementation for Ozone.
+ */
+package org.apache.hadoop.ozone.web.ozShell.keys;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/ozShell/volume/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+/**
+ * Netty-based HTTP server implementation for Ozone.
+ */
+package org.apache.hadoop.ozone.web.ozShell.volume;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/request/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+/**
+ * Netty-based HTTP server implementation for Ozone.
+ */
+package org.apache.hadoop.ozone.web.request;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/response/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+/**
+ * Netty-based HTTP server implementation for Ozone.
+ */
+package org.apache.hadoop.ozone.web.response;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/userauth/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+/**
+ * Netty-based HTTP server implementation for Ozone.
+ */
+package org.apache.hadoop.ozone.web.userauth;

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestPipelinesFailover.java

@@ -442,13 +442,13 @@ public void testPipelineRecoveryStress() throws Exception {
     };
 
     for (String[] scmd: scmds) {
-      String scmd_str = StringUtils.join(" ", scmd);
+      String scmdStr = StringUtils.join(" ", scmd);
       try {
         ShellCommandExecutor sce = new ShellCommandExecutor(scmd);
         sce.execute();
-        LOG.info("'" + scmd_str + "' output:\n" + sce.getOutput());
+        LOG.info("'" + scmdStr + "' output:\n" + sce.getOutput());
       } catch (IOException e) {
-        LOG.warn("Error when running '" + scmd_str + "'", e);
+        LOG.warn("Error when running '" + scmdStr + "'", e);
       }
     }
 

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/common/TestEndPoint.java

@@ -306,28 +306,27 @@ private void heartbeatTaskHelper(InetSocketAddress scmAddress,
 
 
     // Create a datanode state machine for stateConext used by endpoint task
-    try (DatanodeStateMachine stateMachine =
+    try (DatanodeStateMachine stateMachine = new DatanodeStateMachine(
-             new DatanodeStateMachine(DFSTestUtil.getLocalDatanodeID(), conf);
+        DFSTestUtil.getLocalDatanodeID(), conf);
-         EndpointStateMachine rpcEndPoint = SCMTestUtils.createEndpoint(conf,
+        EndpointStateMachine rpcEndPoint = SCMTestUtils
-            scmAddress, rpcTimeout)) {
+            .createEndpoint(conf, scmAddress, rpcTimeout)) {
-    ContainerNodeIDProto containerNodeID = ContainerNodeIDProto.newBuilder()
+      ContainerNodeIDProto containerNodeID = ContainerNodeIDProto.newBuilder()
-        .setClusterID(UUID.randomUUID().toString())
+          .setClusterID(UUID.randomUUID().toString())
-        .setDatanodeID(getDatanodeID().getProtoBufMessage())
+          .setDatanodeID(getDatanodeID().getProtoBufMessage()).build();
-        .build();
+      rpcEndPoint.setState(EndpointStateMachine.EndPointStates.HEARTBEAT);
-    rpcEndPoint.setState(EndpointStateMachine.EndPointStates.HEARTBEAT);
 
-    final StateContext stateContext = new StateContext(conf,
+      final StateContext stateContext =
-        DatanodeStateMachine.DatanodeStates.RUNNING,
+          new StateContext(conf, DatanodeStateMachine.DatanodeStates.RUNNING,
-        stateMachine);
+              stateMachine);
 
-    HeartbeatEndpointTask endpointTask =
+      HeartbeatEndpointTask endpointTask =
-        new HeartbeatEndpointTask(rpcEndPoint, conf, stateContext);
+          new HeartbeatEndpointTask(rpcEndPoint, conf, stateContext);
-    endpointTask.setContainerNodeIDProto(containerNodeID);
+      endpointTask.setContainerNodeIDProto(containerNodeID);
-    endpointTask.call();
+      endpointTask.call();
-    Assert.assertNotNull(endpointTask.getContainerNodeIDProto());
+      Assert.assertNotNull(endpointTask.getContainerNodeIDProto());
 
-    Assert.assertEquals(EndpointStateMachine.EndPointStates.HEARTBEAT,
+      Assert.assertEquals(EndpointStateMachine.EndPointStates.HEARTBEAT,
-        rpcEndPoint.getState());
+          rpcEndPoint.getState());
     }
   }
 
@@ -360,8 +359,8 @@ public void testHeartbeatTaskRpcTimeOut() throws Exception {
    * @return
    */
   ContainerReport getRandomContainerReport() {
-    return new ContainerReport(UUID.randomUUID().toString()
+    return new ContainerReport(UUID.randomUUID().toString(),
-        ,DigestUtils.sha256Hex("Random"));
+        DigestUtils.sha256Hex("Random"));
   }
 
   /**

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/common/impl/TestContainerPersistence.java

@@ -90,7 +90,7 @@ public class TestContainerPersistence {
   @Rule
   public Timeout testTimeout = new Timeout(300000);
 
-  private static Logger LOG =
+  private static Logger log =
       LoggerFactory.getLogger(TestContainerPersistence.class);
   private static String path;
   private static ContainerManagerImpl containerManager;
@@ -149,7 +149,7 @@ public void setupPaths() throws IOException {
   @After
   public void cleanupDir() throws IOException {
     // Clean up SCM metadata
-    LOG.info("Deletting {}", path);
+    log.info("Deletting {}", path);
     FileUtils.deleteDirectory(new File(path));
 
     // Clean up SCM datanode container metadata/data

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/ksm/TestKSMSQLCli.java

@@ -29,7 +29,6 @@
 import org.apache.hadoop.ozone.web.interfaces.StorageHandler;
 import org.apache.hadoop.ozone.web.utils.OzoneUtils;
 import org.junit.Before;
-import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/ksm/TestKeySpaceManager.java

@@ -523,14 +523,14 @@ public void testKeyOverwrite() throws IOException, OzoneException {
       stream.write(dataString.getBytes());
     }
 
-    // We allow the key overwrite to be successful. Please note : Till HDFS-11922
+    // We allow the key overwrite to be successful. Please note : Till
-    // is fixed this causes a data block leak on the data node side. That is
+    // HDFS-11922 is fixed this causes a data block leak on the data node side.
-    // this overwrite only overwrites the keys on KSM. We need to garbage
+    // That is this overwrite only overwrites the keys on KSM. We need to
-    // collect those blocks from datanode.
+    // garbage collect those blocks from datanode.
     KeyArgs keyArgs2 = new KeyArgs(volumeName, bucketName, keyName, userArgs);
     storageHandler.newKeyWriter(keyArgs2);
-    Assert.assertEquals(numKeyAllocateFails,
+    Assert
-        ksmMetrics.getNumKeyAllocateFails());
+        .assertEquals(numKeyAllocateFails, ksmMetrics.getNumKeyAllocateFails());
   }
 
   /**

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/scm/TestSCMMXBean.java

@@ -44,6 +44,10 @@
 import javax.management.openmbean.CompositeData;
 import javax.management.openmbean.TabularData;
 
+/**
+ *
+ * This class is to test JMX management interface for scm information.
+ */
 public class TestSCMMXBean {
 
   public static final Log LOG = LogFactory.getLog(TestSCMMXBean.class);

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/TestBucketInfo.java

@@ -31,7 +31,7 @@
 
 public class TestBucketInfo {
   @Test
-  public void TestBucketInfoJson() throws IOException {
+  public void testBucketInfoJson() throws IOException {
     BucketInfo bucketInfo = new BucketInfo("volumeName", "bucketName");
     String bucketInfoString = bucketInfo.toJsonString();
     BucketInfo newBucketInfo = BucketInfo.parse(bucketInfoString);
@@ -39,7 +39,7 @@ public void TestBucketInfoJson() throws IOException {
   }
 
   @Test
-  public void TestBucketInfoDBString() throws IOException {
+  public void testBucketInfoDBString() throws IOException {
     BucketInfo bucketInfo = new BucketInfo("volumeName", "bucketName");
     String bucketInfoString = bucketInfo.toDBString();
     BucketInfo newBucketInfo = BucketInfo.parse(bucketInfoString);
@@ -47,7 +47,7 @@ public void TestBucketInfoDBString() throws IOException {
   }
 
   @Test
-  public void TestBucketInfoAddAcls() throws IOException {
+  public void testBucketInfoAddAcls() throws IOException {
     BucketInfo bucketInfo = new BucketInfo("volumeName", "bucketName");
     String bucketInfoString = bucketInfo.toDBString();
     BucketInfo newBucketInfo = BucketInfo.parse(bucketInfoString);
@@ -64,7 +64,7 @@ public void TestBucketInfoAddAcls() throws IOException {
 
 
   @Test
-  public void TestBucketInfoVersionAndType() throws IOException {
+  public void testBucketInfoVersionAndType() throws IOException {
     BucketInfo bucketInfo = new BucketInfo("volumeName", "bucketName");
     bucketInfo.setVersioning(OzoneConsts.Versioning.ENABLED);
     bucketInfo.setStorageType(StorageType.DISK);

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/TestErrorCode.java

@@ -30,7 +30,7 @@ public class TestErrorCode {
    * Test Error Generator functions.
    */
   @Test
-  public void TestErrorGen() {
+  public void testErrorGen() {
     OzoneException e = ErrorTable
         .newError(ErrorTable.ACCESS_DENIED, getRequestID(), "/test/path",
                   "localhost");
@@ -40,7 +40,7 @@ public void TestErrorGen() {
   }
 
   @Test
-  public void TestErrorGenWithException() {
+  public void testErrorGenWithException() {
     OzoneException e =
         new OzoneException(ErrorTable.ACCESS_DENIED.getHttpCode(),
                            "short message", new Exception("Hello"));

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/TestOzoneWebAccess.java

@@ -48,7 +48,7 @@
 
 public class TestOzoneWebAccess {
   /**
-   * Set the timeout for every test
+   * Set the timeout for every test.
    */
   @Rule
   public Timeout testTimeout = new Timeout(300000);

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/TestQuota.java

@@ -32,7 +32,7 @@
 
 public class TestQuota {
   @Test
-  public void TestParseQuota() {
+  public void testParseQuota() {
     HashMap<String, Boolean> testMatrix;
     testMatrix = new HashMap<String, Boolean>();
 
@@ -56,11 +56,10 @@ public void TestParseQuota() {
     testMatrix.put("1024 bytes", Boolean.TRUE);
     testMatrix.put("1bytes", Boolean.TRUE);
     testMatrix.put("0bytes", Boolean.TRUE);
-    testMatrix.put("10000 BYTES",Boolean.TRUE );
+    testMatrix.put("10000 BYTES", Boolean.TRUE);
     testMatrix.put("BYTESbytes", Boolean.FALSE);
     testMatrix.put("bytes", Boolean.FALSE);
 
-
     Set<String> keys = testMatrix.keySet();
     for (String key : keys) {
       if (testMatrix.get(key)) {
@@ -79,7 +78,7 @@ public void TestParseQuota() {
   }
 
   @Test
-  public void TestVerifyQuota() {
+  public void testVerifyQuota() {
     OzoneQuota qt = OzoneQuota.parseQuota("10TB");
     assertEquals(qt.getSize(), 10);
     assertEquals(qt.getUnit(), OzoneQuota.Units.TB);
@@ -107,7 +106,7 @@ public void TestVerifyQuota() {
   }
 
   @Test
-  public void TestVerifyRemove() {
+  public void testVerifyRemove() {
     assertTrue(OzoneQuota.isRemove("remove"));
     assertFalse(OzoneQuota.isRemove("not remove"));
     assertFalse(OzoneQuota.isRemove(null));

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/TestUtils.java

@@ -35,7 +35,7 @@ public class TestUtils {
    * Tests if the bucket name handling is correct.
    */
   @Test
-  public  void TestValidBucketNames() {
+  public  void testValidBucketNames() {
     HashMap<String, Boolean> testMatrix;
     // Init the Table with Strings and Expected Return values
     testMatrix = new HashMap<String, Boolean>();
@@ -47,9 +47,8 @@ public  void TestValidBucketNames() {
     testMatrix.put("bucket..ozone.self", Boolean.FALSE);
     testMatrix.put("192.1.1.1", Boolean.FALSE);
     testMatrix.put("ab", Boolean.FALSE);
-    testMatrix.put("bucket.ozone.self.this.is.a.really.long.name.that." +
+    testMatrix.put("bucket.ozone.self.this.is.a.really.long.name.that."
-        "is.more.than.sixty.three.characters.long.for.sure",
+        + "is.more.than.sixty.three.characters.long.for.sure", Boolean.FALSE);
-      Boolean.FALSE);
     testMatrix.put(null, Boolean.FALSE);
     testMatrix.put("bucket@$", Boolean.FALSE);
     testMatrix.put("BUCKET", Boolean.FALSE);
@@ -66,7 +65,7 @@ public  void TestValidBucketNames() {
 
     Set<String> keys = testMatrix.keySet();
     for (String key : keys) {
-      if(testMatrix.get(key)) {
+      if (testMatrix.get(key)) {
 
         // For valid names there should be no exceptions at all
         verifyResourceName(key);
@@ -74,8 +73,8 @@ public  void TestValidBucketNames() {
         try {
           verifyResourceName(key);
           // should never get here since the isValid call will throw
-         fail("An exception was expected but did not happen.");
+          fail("An exception was expected but did not happen.");
-        } catch(IllegalArgumentException e){
+        } catch (IllegalArgumentException e) {
 
         }
       }
@@ -90,11 +89,10 @@ public  void TestValidBucketNames() {
    *  that this test is good enough.
    */
   @Test
-  public void TestRequestIDisRandom(){
+  public void testRequestIDisRandom() {
     HashSet<String> set = new HashSet<>();
-    for (int i = 0; i < 1000; i ++){
+    for (int i = 0; i < 1000; i++) {
       assertTrue(set.add(getRequestID()));
     }
   }
-
 }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/TestVolumeStructs.java

@@ -32,8 +32,8 @@ public class TestVolumeStructs {
 
   @Test
   public void testVolumeInfoParse() throws IOException {
-    VolumeInfo volInfo = new VolumeInfo("testvol",
+    VolumeInfo volInfo =
-      "Thu, Apr 9, 2015 10:23:45 GMT", "gandalf");
+        new VolumeInfo("testvol", "Thu, Apr 9, 2015 10:23:45 GMT", "gandalf");
     VolumeOwner owner = new VolumeOwner("bilbo");
     volInfo.setOwner(owner);
     String jString = volInfo.toJsonString();
@@ -48,8 +48,7 @@ public void testVolumeInfoParse() throws IOException {
   public void testVolumeInfoValue() throws IOException {
     String createdOn = "Thu, Apr 9, 2015 10:23:45 GMT";
     String createdBy = "gandalf";
-    VolumeInfo volInfo = new VolumeInfo("testvol",
+    VolumeInfo volInfo = new VolumeInfo("testvol", createdOn, createdBy);
-      createdOn, createdBy);
     assertEquals(volInfo.getCreatedBy(), createdBy);
     assertEquals(volInfo.getCreatedOn(), createdOn);
   }
@@ -57,11 +56,10 @@ public void testVolumeInfoValue() throws IOException {
 
   @Test
   public void testVolumeListParse() throws IOException {
-
     ListVolumes list = new ListVolumes();
     for (int x = 0; x < 100; x++) {
       VolumeInfo volInfo = new VolumeInfo("testvol" + Integer.toString(x),
-        "Thu, Apr 9, 2015 10:23:45 GMT", "gandalf");
+          "Thu, Apr 9, 2015 10:23:45 GMT", "gandalf");
       list.addVolume(volInfo);
     }
     list.sort();
@@ -69,5 +67,4 @@ public void testVolumeListParse() throws IOException {
     ListVolumes newList = ListVolumes.parse(listString);
     assertEquals(list.toJsonString(), newList.toJsonString());
   }
-
 }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/client/TestBuckets.java

@@ -44,6 +44,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+
 public class TestBuckets {
   /**
    * Set the timeout for every test.
@@ -83,7 +84,7 @@ public static void init() throws IOException,
   }
 
   /**
-   * shutdown MiniDFSCluster
+   * shutdown MiniDFSCluster.
    */
   @AfterClass
   public static void shutdown() {

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/client/TestKeys.java

@@ -110,7 +110,7 @@ public static void init() throws Exception {
   }
 
   /**
-   * shutdown MiniDFSCluster
+   * shutdown MiniDFSCluster.
    */
   @AfterClass
   public static void shutdown() {
@@ -120,7 +120,7 @@ public static void shutdown() {
   }
 
   /**
-   * Creates a file with Random Data
+   * Creates a file with Random Data.
    *
    * @return File.
    */
@@ -165,9 +165,9 @@ static class PutHelper {
     private final String dir;
     private final String keyName;
 
-    OzoneVolume vol;
+    private OzoneVolume vol;
-    OzoneBucket bucket;
+    private OzoneBucket bucket;
-    File file;
+    private File file;
 
     PutHelper(OzoneRestClient client, String dir) {
       this(client, dir, OzoneUtils.getRequestID().toLowerCase());

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/web/client/TestVolume.java

@@ -90,7 +90,7 @@ public static void init() throws Exception {
   }
 
   /**
-   * shutdown MiniDFSCluster
+   * shutdown MiniDFSCluster.
    */
   @AfterClass
   public static void shutdown() {
@@ -255,10 +255,10 @@ static void runTestListAllVolumes(OzoneRestClient client)
     final int step = 10;
     client.setUserAuth(OzoneConsts.OZONE_SIMPLE_HDFS_USER);
     for (int x = 0; x < volCount; x++) {
-      String userName = "frodo" +
+      String userName =
-          RandomStringUtils.randomAlphabetic(5).toLowerCase();
+          "frodo" + RandomStringUtils.randomAlphabetic(5).toLowerCase();
-      String volumeName = "vol" +
+      String volumeName =
-          RandomStringUtils.randomAlphabetic(5).toLowerCase();
+          "vol" + RandomStringUtils.randomAlphabetic(5).toLowerCase();
       OzoneVolume vol = client.createVolume(volumeName, userName, "100TB");
       assertNotNull(vol);
     }
@@ -266,17 +266,16 @@ static void runTestListAllVolumes(OzoneRestClient client)
     int count = 0;
     int pagecount = 0;
     while (count < volCount) {
-      List<OzoneVolume> ovols = client.listAllVolumes(null, step,
+      List<OzoneVolume> ovols = client.listAllVolumes(null, step, prevKey);
-          prevKey);
       count += ovols.size();
-      if(ovols.size() > 0) {
+      if (ovols.size() > 0) {
         prevKey = ovols.get(ovols.size() - 1);
       }
       pagecount++;
     }
     // becasue we are querying an existing ozone store, there will
     // be volumes created by other tests too. So we should get more page counts.
-    Assert.assertEquals(volCount / step , pagecount);
+    Assert.assertEquals(volCount / step, pagecount);
   }
 
   @Test