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From els...@apache.org
Subject [5/6] hbase git commit: HBASE-17001 Enforce quota violation policies in the RegionServer
Date Fri, 10 Feb 2017 16:25:08 GMT
http://git-wip-us.apache.org/repos/asf/hbase/blob/7e4383e1/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/QuotaProtos.java
----------------------------------------------------------------------
diff --git a/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/QuotaProtos.java b/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/QuotaProtos.java
index cc40536..d466e59 100644
--- a/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/QuotaProtos.java
+++ b/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/QuotaProtos.java
@@ -5778,6 +5778,1284 @@ public final class QuotaProtos {
     // @@protoc_insertion_point(class_scope:hbase.pb.SpaceLimitRequest)
   }
 
+  public interface SpaceQuotaStatusOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // optional .hbase.pb.SpaceViolationPolicy policy = 1;
+    /**
+     * <code>optional .hbase.pb.SpaceViolationPolicy policy = 1;</code>
+     */
+    boolean hasPolicy();
+    /**
+     * <code>optional .hbase.pb.SpaceViolationPolicy policy = 1;</code>
+     */
+    org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy getPolicy();
+
+    // optional bool in_violation = 2;
+    /**
+     * <code>optional bool in_violation = 2;</code>
+     */
+    boolean hasInViolation();
+    /**
+     * <code>optional bool in_violation = 2;</code>
+     */
+    boolean getInViolation();
+  }
+  /**
+   * Protobuf type {@code hbase.pb.SpaceQuotaStatus}
+   *
+   * <pre>
+   * Represents the state of a quota on a table. Either the quota is not in violation
+   * or it is in violatino there is a violation policy which should be in effect.
+   * </pre>
+   */
+  public static final class SpaceQuotaStatus extends
+      com.google.protobuf.GeneratedMessage
+      implements SpaceQuotaStatusOrBuilder {
+    // Use SpaceQuotaStatus.newBuilder() to construct.
+    private SpaceQuotaStatus(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private SpaceQuotaStatus(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final SpaceQuotaStatus defaultInstance;
+    public static SpaceQuotaStatus getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public SpaceQuotaStatus getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private SpaceQuotaStatus(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 8: {
+              int rawValue = input.readEnum();
+              org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy value = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy.valueOf(rawValue);
+              if (value == null) {
+                unknownFields.mergeVarintField(1, rawValue);
+              } else {
+                bitField0_ |= 0x00000001;
+                policy_ = value;
+              }
+              break;
+            }
+            case 16: {
+              bitField0_ |= 0x00000002;
+              inViolation_ = input.readBool();
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaStatus_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaStatus_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.class, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<SpaceQuotaStatus> PARSER =
+        new com.google.protobuf.AbstractParser<SpaceQuotaStatus>() {
+      public SpaceQuotaStatus parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new SpaceQuotaStatus(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<SpaceQuotaStatus> getParserForType() {
+      return PARSER;
+    }
+
+    private int bitField0_;
+    // optional .hbase.pb.SpaceViolationPolicy policy = 1;
+    public static final int POLICY_FIELD_NUMBER = 1;
+    private org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy policy_;
+    /**
+     * <code>optional .hbase.pb.SpaceViolationPolicy policy = 1;</code>
+     */
+    public boolean hasPolicy() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    /**
+     * <code>optional .hbase.pb.SpaceViolationPolicy policy = 1;</code>
+     */
+    public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy getPolicy() {
+      return policy_;
+    }
+
+    // optional bool in_violation = 2;
+    public static final int IN_VIOLATION_FIELD_NUMBER = 2;
+    private boolean inViolation_;
+    /**
+     * <code>optional bool in_violation = 2;</code>
+     */
+    public boolean hasInViolation() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    /**
+     * <code>optional bool in_violation = 2;</code>
+     */
+    public boolean getInViolation() {
+      return inViolation_;
+    }
+
+    private void initFields() {
+      policy_ = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy.DISABLE;
+      inViolation_ = false;
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeEnum(1, policy_.getNumber());
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeBool(2, inViolation_);
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeEnumSize(1, policy_.getNumber());
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBoolSize(2, inViolation_);
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    @java.lang.Override
+    public boolean equals(final java.lang.Object obj) {
+      if (obj == this) {
+       return true;
+      }
+      if (!(obj instanceof org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus)) {
+        return super.equals(obj);
+      }
+      org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus other = (org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus) obj;
+
+      boolean result = true;
+      result = result && (hasPolicy() == other.hasPolicy());
+      if (hasPolicy()) {
+        result = result &&
+            (getPolicy() == other.getPolicy());
+      }
+      result = result && (hasInViolation() == other.hasInViolation());
+      if (hasInViolation()) {
+        result = result && (getInViolation()
+            == other.getInViolation());
+      }
+      result = result &&
+          getUnknownFields().equals(other.getUnknownFields());
+      return result;
+    }
+
+    private int memoizedHashCode = 0;
+    @java.lang.Override
+    public int hashCode() {
+      if (memoizedHashCode != 0) {
+        return memoizedHashCode;
+      }
+      int hash = 41;
+      hash = (19 * hash) + getDescriptorForType().hashCode();
+      if (hasPolicy()) {
+        hash = (37 * hash) + POLICY_FIELD_NUMBER;
+        hash = (53 * hash) + hashEnum(getPolicy());
+      }
+      if (hasInViolation()) {
+        hash = (37 * hash) + IN_VIOLATION_FIELD_NUMBER;
+        hash = (53 * hash) + hashBoolean(getInViolation());
+      }
+      hash = (29 * hash) + getUnknownFields().hashCode();
+      memoizedHashCode = hash;
+      return hash;
+    }
+
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code hbase.pb.SpaceQuotaStatus}
+     *
+     * <pre>
+     * Represents the state of a quota on a table. Either the quota is not in violation
+     * or it is in violatino there is a violation policy which should be in effect.
+     * </pre>
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatusOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaStatus_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaStatus_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.class, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.Builder.class);
+      }
+
+      // Construct using org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        policy_ = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy.DISABLE;
+        bitField0_ = (bitField0_ & ~0x00000001);
+        inViolation_ = false;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaStatus_descriptor;
+      }
+
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus getDefaultInstanceForType() {
+        return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.getDefaultInstance();
+      }
+
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus build() {
+        org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus buildPartial() {
+        org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus result = new org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.policy_ = policy_;
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        result.inViolation_ = inViolation_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus) {
+          return mergeFrom((org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus other) {
+        if (other == org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.getDefaultInstance()) return this;
+        if (other.hasPolicy()) {
+          setPolicy(other.getPolicy());
+        }
+        if (other.hasInViolation()) {
+          setInViolation(other.getInViolation());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // optional .hbase.pb.SpaceViolationPolicy policy = 1;
+      private org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy policy_ = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy.DISABLE;
+      /**
+       * <code>optional .hbase.pb.SpaceViolationPolicy policy = 1;</code>
+       */
+      public boolean hasPolicy() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceViolationPolicy policy = 1;</code>
+       */
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy getPolicy() {
+        return policy_;
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceViolationPolicy policy = 1;</code>
+       */
+      public Builder setPolicy(org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy value) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        bitField0_ |= 0x00000001;
+        policy_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceViolationPolicy policy = 1;</code>
+       */
+      public Builder clearPolicy() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        policy_ = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceViolationPolicy.DISABLE;
+        onChanged();
+        return this;
+      }
+
+      // optional bool in_violation = 2;
+      private boolean inViolation_ ;
+      /**
+       * <code>optional bool in_violation = 2;</code>
+       */
+      public boolean hasInViolation() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional bool in_violation = 2;</code>
+       */
+      public boolean getInViolation() {
+        return inViolation_;
+      }
+      /**
+       * <code>optional bool in_violation = 2;</code>
+       */
+      public Builder setInViolation(boolean value) {
+        bitField0_ |= 0x00000002;
+        inViolation_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional bool in_violation = 2;</code>
+       */
+      public Builder clearInViolation() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        inViolation_ = false;
+        onChanged();
+        return this;
+      }
+
+      // @@protoc_insertion_point(builder_scope:hbase.pb.SpaceQuotaStatus)
+    }
+
+    static {
+      defaultInstance = new SpaceQuotaStatus(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:hbase.pb.SpaceQuotaStatus)
+  }
+
+  public interface SpaceQuotaSnapshotOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+
+    // optional .hbase.pb.SpaceQuotaStatus status = 1;
+    /**
+     * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+     */
+    boolean hasStatus();
+    /**
+     * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+     */
+    org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus getStatus();
+    /**
+     * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+     */
+    org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatusOrBuilder getStatusOrBuilder();
+
+    // optional uint64 usage = 2;
+    /**
+     * <code>optional uint64 usage = 2;</code>
+     */
+    boolean hasUsage();
+    /**
+     * <code>optional uint64 usage = 2;</code>
+     */
+    long getUsage();
+
+    // optional uint64 limit = 3;
+    /**
+     * <code>optional uint64 limit = 3;</code>
+     */
+    boolean hasLimit();
+    /**
+     * <code>optional uint64 limit = 3;</code>
+     */
+    long getLimit();
+  }
+  /**
+   * Protobuf type {@code hbase.pb.SpaceQuotaSnapshot}
+   *
+   * <pre>
+   * Message stored in the value of hbase:quota table to denote the status of a table WRT
+   * the quota applicable to it.
+   * </pre>
+   */
+  public static final class SpaceQuotaSnapshot extends
+      com.google.protobuf.GeneratedMessage
+      implements SpaceQuotaSnapshotOrBuilder {
+    // Use SpaceQuotaSnapshot.newBuilder() to construct.
+    private SpaceQuotaSnapshot(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+      super(builder);
+      this.unknownFields = builder.getUnknownFields();
+    }
+    private SpaceQuotaSnapshot(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }
+
+    private static final SpaceQuotaSnapshot defaultInstance;
+    public static SpaceQuotaSnapshot getDefaultInstance() {
+      return defaultInstance;
+    }
+
+    public SpaceQuotaSnapshot getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+
+    private final com.google.protobuf.UnknownFieldSet unknownFields;
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+        getUnknownFields() {
+      return this.unknownFields;
+    }
+    private SpaceQuotaSnapshot(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      initFields();
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+            case 10: {
+              org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000001) == 0x00000001)) {
+                subBuilder = status_.toBuilder();
+              }
+              status_ = input.readMessage(org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.PARSER, extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(status_);
+                status_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000001;
+              break;
+            }
+            case 16: {
+              bitField0_ |= 0x00000002;
+              usage_ = input.readUInt64();
+              break;
+            }
+            case 24: {
+              bitField0_ |= 0x00000004;
+              limit_ = input.readUInt64();
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e.getMessage()).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaSnapshot_descriptor;
+    }
+
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaSnapshot_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot.class, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot.Builder.class);
+    }
+
+    public static com.google.protobuf.Parser<SpaceQuotaSnapshot> PARSER =
+        new com.google.protobuf.AbstractParser<SpaceQuotaSnapshot>() {
+      public SpaceQuotaSnapshot parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new SpaceQuotaSnapshot(input, extensionRegistry);
+      }
+    };
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<SpaceQuotaSnapshot> getParserForType() {
+      return PARSER;
+    }
+
+    private int bitField0_;
+    // optional .hbase.pb.SpaceQuotaStatus status = 1;
+    public static final int STATUS_FIELD_NUMBER = 1;
+    private org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus status_;
+    /**
+     * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+     */
+    public boolean hasStatus() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    /**
+     * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+     */
+    public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus getStatus() {
+      return status_;
+    }
+    /**
+     * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+     */
+    public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatusOrBuilder getStatusOrBuilder() {
+      return status_;
+    }
+
+    // optional uint64 usage = 2;
+    public static final int USAGE_FIELD_NUMBER = 2;
+    private long usage_;
+    /**
+     * <code>optional uint64 usage = 2;</code>
+     */
+    public boolean hasUsage() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    /**
+     * <code>optional uint64 usage = 2;</code>
+     */
+    public long getUsage() {
+      return usage_;
+    }
+
+    // optional uint64 limit = 3;
+    public static final int LIMIT_FIELD_NUMBER = 3;
+    private long limit_;
+    /**
+     * <code>optional uint64 limit = 3;</code>
+     */
+    public boolean hasLimit() {
+      return ((bitField0_ & 0x00000004) == 0x00000004);
+    }
+    /**
+     * <code>optional uint64 limit = 3;</code>
+     */
+    public long getLimit() {
+      return limit_;
+    }
+
+    private void initFields() {
+      status_ = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.getDefaultInstance();
+      usage_ = 0L;
+      limit_ = 0L;
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeMessage(1, status_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeUInt64(2, usage_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        output.writeUInt64(3, limit_);
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(1, status_);
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt64Size(2, usage_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeUInt64Size(3, limit_);
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+
+    @java.lang.Override
+    public boolean equals(final java.lang.Object obj) {
+      if (obj == this) {
+       return true;
+      }
+      if (!(obj instanceof org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot)) {
+        return super.equals(obj);
+      }
+      org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot other = (org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot) obj;
+
+      boolean result = true;
+      result = result && (hasStatus() == other.hasStatus());
+      if (hasStatus()) {
+        result = result && getStatus()
+            .equals(other.getStatus());
+      }
+      result = result && (hasUsage() == other.hasUsage());
+      if (hasUsage()) {
+        result = result && (getUsage()
+            == other.getUsage());
+      }
+      result = result && (hasLimit() == other.hasLimit());
+      if (hasLimit()) {
+        result = result && (getLimit()
+            == other.getLimit());
+      }
+      result = result &&
+          getUnknownFields().equals(other.getUnknownFields());
+      return result;
+    }
+
+    private int memoizedHashCode = 0;
+    @java.lang.Override
+    public int hashCode() {
+      if (memoizedHashCode != 0) {
+        return memoizedHashCode;
+      }
+      int hash = 41;
+      hash = (19 * hash) + getDescriptorForType().hashCode();
+      if (hasStatus()) {
+        hash = (37 * hash) + STATUS_FIELD_NUMBER;
+        hash = (53 * hash) + getStatus().hashCode();
+      }
+      if (hasUsage()) {
+        hash = (37 * hash) + USAGE_FIELD_NUMBER;
+        hash = (53 * hash) + hashLong(getUsage());
+      }
+      if (hasLimit()) {
+        hash = (37 * hash) + LIMIT_FIELD_NUMBER;
+        hash = (53 * hash) + hashLong(getLimit());
+      }
+      hash = (29 * hash) + getUnknownFields().hashCode();
+      memoizedHashCode = hash;
+      return hash;
+    }
+
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseDelimitedFrom(input, extensionRegistry);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input);
+    }
+    public static org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return PARSER.parseFrom(input, extensionRegistry);
+    }
+
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code hbase.pb.SpaceQuotaSnapshot}
+     *
+     * <pre>
+     * Message stored in the value of hbase:quota table to denote the status of a table WRT
+     * the quota applicable to it.
+     * </pre>
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshotOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaSnapshot_descriptor;
+      }
+
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaSnapshot_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot.class, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot.Builder.class);
+      }
+
+      // Construct using org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+          getStatusFieldBuilder();
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+
+      public Builder clear() {
+        super.clear();
+        if (statusBuilder_ == null) {
+          status_ = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.getDefaultInstance();
+        } else {
+          statusBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000001);
+        usage_ = 0L;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        limit_ = 0L;
+        bitField0_ = (bitField0_ & ~0x00000004);
+        return this;
+      }
+
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.internal_static_hbase_pb_SpaceQuotaSnapshot_descriptor;
+      }
+
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot getDefaultInstanceForType() {
+        return org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot.getDefaultInstance();
+      }
+
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot build() {
+        org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot buildPartial() {
+        org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot result = new org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        if (statusBuilder_ == null) {
+          result.status_ = status_;
+        } else {
+          result.status_ = statusBuilder_.build();
+        }
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        result.usage_ = usage_;
+        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+          to_bitField0_ |= 0x00000004;
+        }
+        result.limit_ = limit_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot) {
+          return mergeFrom((org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot other) {
+        if (other == org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot.getDefaultInstance()) return this;
+        if (other.hasStatus()) {
+          mergeStatus(other.getStatus());
+        }
+        if (other.hasUsage()) {
+          setUsage(other.getUsage());
+        }
+        if (other.hasLimit()) {
+          setLimit(other.getLimit());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaSnapshot) e.getUnfinishedMessage();
+          throw e;
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      // optional .hbase.pb.SpaceQuotaStatus status = 1;
+      private org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus status_ = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.getDefaultInstance();
+      private com.google.protobuf.SingleFieldBuilder<
+          org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.Builder, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatusOrBuilder> statusBuilder_;
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      public boolean hasStatus() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus getStatus() {
+        if (statusBuilder_ == null) {
+          return status_;
+        } else {
+          return statusBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      public Builder setStatus(org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus value) {
+        if (statusBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          status_ = value;
+          onChanged();
+        } else {
+          statusBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000001;
+        return this;
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      public Builder setStatus(
+          org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.Builder builderForValue) {
+        if (statusBuilder_ == null) {
+          status_ = builderForValue.build();
+          onChanged();
+        } else {
+          statusBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000001;
+        return this;
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      public Builder mergeStatus(org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus value) {
+        if (statusBuilder_ == null) {
+          if (((bitField0_ & 0x00000001) == 0x00000001) &&
+              status_ != org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.getDefaultInstance()) {
+            status_ =
+              org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.newBuilder(status_).mergeFrom(value).buildPartial();
+          } else {
+            status_ = value;
+          }
+          onChanged();
+        } else {
+          statusBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000001;
+        return this;
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      public Builder clearStatus() {
+        if (statusBuilder_ == null) {
+          status_ = org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.getDefaultInstance();
+          onChanged();
+        } else {
+          statusBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000001);
+        return this;
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.Builder getStatusBuilder() {
+        bitField0_ |= 0x00000001;
+        onChanged();
+        return getStatusFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      public org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatusOrBuilder getStatusOrBuilder() {
+        if (statusBuilder_ != null) {
+          return statusBuilder_.getMessageOrBuilder();
+        } else {
+          return status_;
+        }
+      }
+      /**
+       * <code>optional .hbase.pb.SpaceQuotaStatus status = 1;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilder<
+          org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.Builder, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatusOrBuilder>
+          getStatusFieldBuilder() {
+        if (statusBuilder_ == null) {
+          statusBuilder_ = new com.google.protobuf.SingleFieldBuilder<
+              org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatus.Builder, org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.SpaceQuotaStatusOrBuilder>(
+                  status_,
+                  getParentForChildren(),
+                  isClean());
+          status_ = null;
+        }
+        return statusBuilder_;
+      }
+
+      // optional uint64 usage = 2;
+      private long usage_ ;
+      /**
+       * <code>optional uint64 usage = 2;</code>
+       */
+      public boolean hasUsage() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      /**
+       * <code>optional uint64 usage = 2;</code>
+       */
+      public long getUsage() {
+        return usage_;
+      }
+      /**
+       * <code>optional uint64 usage = 2;</code>
+       */
+      public Builder setUsage(long value) {
+        bitField0_ |= 0x00000002;
+        usage_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint64 usage = 2;</code>
+       */
+      public Builder clearUsage() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        usage_ = 0L;
+        onChanged();
+        return this;
+      }
+
+      // optional uint64 limit = 3;
+      private long limit_ ;
+      /**
+       * <code>optional uint64 limit = 3;</code>
+       */
+      public boolean hasLimit() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      /**
+       * <code>optional uint64 limit = 3;</code>
+       */
+      public long getLimit() {
+        return limit_;
+      }
+      /**
+       * <code>optional uint64 limit = 3;</code>
+       */
+      public Builder setLimit(long value) {
+        bitField0_ |= 0x00000004;
+        limit_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional uint64 limit = 3;</code>
+       */
+      public Builder clearLimit() {
+        bitField0_ = (bitField0_ & ~0x00000004);
+        limit_ = 0L;
+        onChanged();
+        return this;
+      }
+
+      // @@protoc_insertion_point(builder_scope:hbase.pb.SpaceQuotaSnapshot)
+    }
+
+    static {
+      defaultInstance = new SpaceQuotaSnapshot(true);
+      defaultInstance.initFields();
+    }
+
+    // @@protoc_insertion_point(class_scope:hbase.pb.SpaceQuotaSnapshot)
+  }
+
   private static com.google.protobuf.Descriptors.Descriptor
     internal_static_hbase_pb_TimedQuota_descriptor;
   private static
@@ -5813,6 +7091,16 @@ public final class QuotaProtos {
   private static
     com.google.protobuf.GeneratedMessage.FieldAccessorTable
       internal_static_hbase_pb_SpaceLimitRequest_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_hbase_pb_SpaceQuotaStatus_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_hbase_pb_SpaceQuotaStatus_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_hbase_pb_SpaceQuotaSnapshot_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_hbase_pb_SpaceQuotaSnapshot_fieldAccessorTable;
 
   public static com.google.protobuf.Descriptors.FileDescriptor
       getDescriptor() {
@@ -5842,16 +7130,20 @@ public final class QuotaProtos {
       "limit\030\001 \001(\004\0228\n\020violation_policy\030\002 \001(\0162\036." +
       "hbase.pb.SpaceViolationPolicy\"8\n\021SpaceLi" +
       "mitRequest\022#\n\005quota\030\001 \001(\0132\024.hbase.pb.Spa",
-      "ceQuota*&\n\nQuotaScope\022\013\n\007CLUSTER\020\001\022\013\n\007MA" +
-      "CHINE\020\002*v\n\014ThrottleType\022\022\n\016REQUEST_NUMBE" +
-      "R\020\001\022\020\n\014REQUEST_SIZE\020\002\022\020\n\014WRITE_NUMBER\020\003\022" +
-      "\016\n\nWRITE_SIZE\020\004\022\017\n\013READ_NUMBER\020\005\022\r\n\tREAD" +
-      "_SIZE\020\006*$\n\tQuotaType\022\014\n\010THROTTLE\020\001\022\t\n\005SP" +
-      "ACE\020\002*]\n\024SpaceViolationPolicy\022\013\n\007DISABLE" +
-      "\020\001\022\031\n\025NO_WRITES_COMPACTIONS\020\002\022\r\n\tNO_WRIT" +
-      "ES\020\003\022\016\n\nNO_INSERTS\020\004BA\n*org.apache.hadoo" +
-      "p.hbase.protobuf.generatedB\013QuotaProtosH" +
-      "\001\210\001\001\240\001\001"
+      "ceQuota\"X\n\020SpaceQuotaStatus\022.\n\006policy\030\001 " +
+      "\001(\0162\036.hbase.pb.SpaceViolationPolicy\022\024\n\014i" +
+      "n_violation\030\002 \001(\010\"^\n\022SpaceQuotaSnapshot\022" +
+      "*\n\006status\030\001 \001(\0132\032.hbase.pb.SpaceQuotaSta" +
+      "tus\022\r\n\005usage\030\002 \001(\004\022\r\n\005limit\030\003 \001(\004*&\n\nQuo" +
+      "taScope\022\013\n\007CLUSTER\020\001\022\013\n\007MACHINE\020\002*v\n\014Thr" +
+      "ottleType\022\022\n\016REQUEST_NUMBER\020\001\022\020\n\014REQUEST" +
+      "_SIZE\020\002\022\020\n\014WRITE_NUMBER\020\003\022\016\n\nWRITE_SIZE\020" +
+      "\004\022\017\n\013READ_NUMBER\020\005\022\r\n\tREAD_SIZE\020\006*$\n\tQuo" +
+      "taType\022\014\n\010THROTTLE\020\001\022\t\n\005SPACE\020\002*]\n\024Space",
+      "ViolationPolicy\022\013\n\007DISABLE\020\001\022\031\n\025NO_WRITE" +
+      "S_COMPACTIONS\020\002\022\r\n\tNO_WRITES\020\003\022\016\n\nNO_INS" +
+      "ERTS\020\004BA\n*org.apache.hadoop.hbase.protob" +
+      "uf.generatedB\013QuotaProtosH\001\210\001\001\240\001\001"
     };
     com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
       new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {
@@ -5900,6 +7192,18 @@ public final class QuotaProtos {
             com.google.protobuf.GeneratedMessage.FieldAccessorTable(
               internal_static_hbase_pb_SpaceLimitRequest_descriptor,
               new java.lang.String[] { "Quota", });
+          internal_static_hbase_pb_SpaceQuotaStatus_descriptor =
+            getDescriptor().getMessageTypes().get(7);
+          internal_static_hbase_pb_SpaceQuotaStatus_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_hbase_pb_SpaceQuotaStatus_descriptor,
+              new java.lang.String[] { "Policy", "InViolation", });
+          internal_static_hbase_pb_SpaceQuotaSnapshot_descriptor =
+            getDescriptor().getMessageTypes().get(8);
+          internal_static_hbase_pb_SpaceQuotaSnapshot_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_hbase_pb_SpaceQuotaSnapshot_descriptor,
+              new java.lang.String[] { "Status", "Usage", "Limit", });
           return null;
         }
       };

http://git-wip-us.apache.org/repos/asf/hbase/blob/7e4383e1/hbase-protocol/src/main/protobuf/Quota.proto
----------------------------------------------------------------------
diff --git a/hbase-protocol/src/main/protobuf/Quota.proto b/hbase-protocol/src/main/protobuf/Quota.proto
index c12b997..02d825b 100644
--- a/hbase-protocol/src/main/protobuf/Quota.proto
+++ b/hbase-protocol/src/main/protobuf/Quota.proto
@@ -95,3 +95,18 @@ message SpaceQuota {
 message SpaceLimitRequest {
   optional SpaceQuota quota = 1;
 }
+
+// Represents the state of a quota on a table. Either the quota is not in violation
+// or it is in violatino there is a violation policy which should be in effect.
+message SpaceQuotaStatus {
+  optional SpaceViolationPolicy policy = 1;
+  optional bool in_violation = 2;
+}
+
+// Message stored in the value of hbase:quota table to denote the status of a table WRT
+// the quota applicable to it.
+message SpaceQuotaSnapshot {
+  optional SpaceQuotaStatus status = 1;
+  optional uint64 usage = 2;
+  optional uint64 limit = 3;
+}

http://git-wip-us.apache.org/repos/asf/hbase/blob/7e4383e1/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
index 411c33d..ccddd71 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
@@ -133,8 +133,8 @@ import org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;
 import org.apache.hadoop.hbase.quotas.MasterQuotaManager;
 import org.apache.hadoop.hbase.quotas.QuotaObserverChore;
 import org.apache.hadoop.hbase.quotas.QuotaUtil;
-import org.apache.hadoop.hbase.quotas.SpaceQuotaViolationNotifier;
-import org.apache.hadoop.hbase.quotas.SpaceQuotaViolationNotifierFactory;
+import org.apache.hadoop.hbase.quotas.SpaceQuotaSnapshotNotifier;
+import org.apache.hadoop.hbase.quotas.SpaceQuotaSnapshotNotifierFactory;
 import org.apache.hadoop.hbase.regionserver.DefaultStoreEngine;
 import org.apache.hadoop.hbase.regionserver.HRegionServer;
 import org.apache.hadoop.hbase.regionserver.HStore;
@@ -375,7 +375,7 @@ public class HMaster extends HRegionServer implements MasterServices {
 
   // it is assigned after 'initialized' guard set to true, so should be volatile
   private volatile MasterQuotaManager quotaManager;
-  private SpaceQuotaViolationNotifier spaceQuotaViolationNotifier;
+  private SpaceQuotaSnapshotNotifier spaceQuotaSnapshotNotifier;
   private QuotaObserverChore quotaObserverChore;
 
   private ProcedureExecutor<MasterProcedureEnv> procedureExecutor;
@@ -865,10 +865,14 @@ public class HMaster extends HRegionServer implements MasterServices {
 
     status.setStatus("Starting quota manager");
     initQuotaManager();
-    this.spaceQuotaViolationNotifier = createQuotaViolationNotifier();
-    this.quotaObserverChore = new QuotaObserverChore(this);
-    // Start the chore to read the region FS space reports and act on them
-    getChoreService().scheduleChore(quotaObserverChore);
+    if (QuotaUtil.isQuotaEnabled(conf)) {
+      // Create the quota snapshot notifier
+      spaceQuotaSnapshotNotifier = createQuotaSnapshotNotifier();
+      spaceQuotaSnapshotNotifier.initialize(getClusterConnection());
+      this.quotaObserverChore = new QuotaObserverChore(this);
+      // Start the chore to read the region FS space reports and act on them
+      getChoreService().scheduleChore(quotaObserverChore);
+    }
 
     // clear the dead servers with same host name and port of online server because we are not
     // removing dead server with same hostname and port of rs which is trying to check in before
@@ -956,10 +960,9 @@ public class HMaster extends HRegionServer implements MasterServices {
     this.quotaManager = quotaManager;
   }
 
-  SpaceQuotaViolationNotifier createQuotaViolationNotifier() {
-    SpaceQuotaViolationNotifier notifier =
-        SpaceQuotaViolationNotifierFactory.getInstance().create(getConfiguration());
-    notifier.initialize(getClusterConnection());
+  SpaceQuotaSnapshotNotifier createQuotaSnapshotNotifier() {
+    SpaceQuotaSnapshotNotifier notifier =
+        SpaceQuotaSnapshotNotifierFactory.getInstance().create(getConfiguration());
     return notifier;
   }
 
@@ -3290,7 +3293,7 @@ public class HMaster extends HRegionServer implements MasterServices {
     return this.quotaObserverChore;
   }
 
-  public SpaceQuotaViolationNotifier getSpaceQuotaViolationNotifier() {
-    return this.spaceQuotaViolationNotifier;
+  public SpaceQuotaSnapshotNotifier getSpaceQuotaSnapshotNotifier() {
+    return this.spaceQuotaSnapshotNotifier;
   }
 }

http://git-wip-us.apache.org/repos/asf/hbase/blob/7e4383e1/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/ActivePolicyEnforcement.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/ActivePolicyEnforcement.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/ActivePolicyEnforcement.java
new file mode 100644
index 0000000..9408e6c
--- /dev/null
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/ActivePolicyEnforcement.java
@@ -0,0 +1,86 @@
+/*
+ * 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.hbase.quotas;
+
+import java.util.Map;
+import java.util.Objects;
+
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.classification.InterfaceAudience;
+import org.apache.hadoop.hbase.classification.InterfaceStability;
+import org.apache.hadoop.hbase.regionserver.Region;
+import org.apache.hadoop.hbase.regionserver.RegionServerServices;
+
+/**
+ * A class to ease dealing with tables that have and do not have violation policies
+ * being enforced in a uniform manner. Immutable.
+ */
+@InterfaceAudience.Private
+@InterfaceStability.Evolving
+public class ActivePolicyEnforcement {
+  private final Map<TableName,SpaceViolationPolicyEnforcement> activePolicies;
+  private final Map<TableName,SpaceQuotaSnapshot> snapshots;
+  private final RegionServerServices rss;
+
+  public ActivePolicyEnforcement(Map<TableName,SpaceViolationPolicyEnforcement> activePolicies,
+      Map<TableName,SpaceQuotaSnapshot> snapshots, RegionServerServices rss) {
+    this.activePolicies = activePolicies;
+    this.snapshots = snapshots;
+    this.rss = rss;
+  }
+
+  /**
+   * Returns the proper {@link SpaceViolationPolicyEnforcement} implementation for the given table.
+   * If the given table does not have a violation policy enforced, a "no-op" policy will
+   * be returned which always allows an action.
+   *
+   * @see #getPolicyEnforcement(TableName)
+   */
+  public SpaceViolationPolicyEnforcement getPolicyEnforcement(Region r) {
+    return getPolicyEnforcement(Objects.requireNonNull(r).getTableDesc().getTableName());
+  }
+
+  /**
+   * Returns the proper {@link SpaceViolationPolicyEnforcement} implementation for the given table.
+   * If the given table does not have a violation policy enforced, a "no-op" policy will
+   * be returned which always allows an action.
+   *
+   * @param tableName The table to fetch the policy for.
+   * @return A non-null {@link SpaceViolationPolicyEnforcement} instance.
+   */
+  public SpaceViolationPolicyEnforcement getPolicyEnforcement(TableName tableName) {
+    SpaceViolationPolicyEnforcement policy = activePolicies.get(Objects.requireNonNull(tableName));
+    if (null == policy) {
+      synchronized (activePolicies) {
+        // If we've never seen a snapshot, assume no use, and infinite limit
+        SpaceQuotaSnapshot snapshot = snapshots.get(tableName);
+        if (null == snapshot) {
+          snapshot = SpaceQuotaSnapshot.getNoSuchSnapshot();
+        }
+        // Create the default policy and cache it
+        return SpaceViolationPolicyEnforcementFactory.getInstance().createWithoutViolation(
+            rss, tableName, snapshot);
+      }
+    }
+    return policy;
+  }
+
+  @Override
+  public String toString() {
+    return getClass().getSimpleName() + ": " + activePolicies;
+  }
+}

http://git-wip-us.apache.org/repos/asf/hbase/blob/7e4383e1/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NamespaceQuotaSnapshotStore.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NamespaceQuotaSnapshotStore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NamespaceQuotaSnapshotStore.java
new file mode 100644
index 0000000..75550f3
--- /dev/null
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NamespaceQuotaSnapshotStore.java
@@ -0,0 +1,127 @@
+/*
+ * 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.hbase.quotas;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Map.Entry;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock;
+
+import org.apache.hadoop.hbase.HRegionInfo;
+import org.apache.hadoop.hbase.classification.InterfaceAudience;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.quotas.SpaceQuotaSnapshot.SpaceQuotaStatus;
+import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.QuotaProtos.Quotas;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.QuotaProtos.SpaceQuota;
+
+import com.google.common.base.Predicate;
+import com.google.common.collect.Iterables;
+
+/**
+ * {@link QuotaSnapshotStore} implementation for namespaces.
+ */
+@InterfaceAudience.Private
+public class NamespaceQuotaSnapshotStore implements QuotaSnapshotStore<String> {
+  private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
+  private final ReadLock rlock = lock.readLock();
+  private final WriteLock wlock = lock.writeLock();
+
+  private final Connection conn;
+  private final QuotaObserverChore chore;
+  private Map<HRegionInfo,Long> regionUsage;
+
+  public NamespaceQuotaSnapshotStore(Connection conn, QuotaObserverChore chore, Map<HRegionInfo,Long> regionUsage) {
+    this.conn = Objects.requireNonNull(conn);
+    this.chore = Objects.requireNonNull(chore);
+    this.regionUsage = Objects.requireNonNull(regionUsage);
+  }
+
+  @Override
+  public SpaceQuota getSpaceQuota(String namespace) throws IOException {
+    Quotas quotas = getQuotaForNamespace(namespace);
+    if (null != quotas && quotas.hasSpace()) {
+      return quotas.getSpace();
+    }
+    return null;
+  }
+
+  /**
+   * Fetches the namespace quota. Visible for mocking/testing.
+   */
+  Quotas getQuotaForNamespace(String namespace) throws IOException {
+    return QuotaTableUtil.getNamespaceQuota(conn, namespace);
+  }
+
+  @Override
+  public SpaceQuotaSnapshot getCurrentState(String namespace) {
+    // Defer the "current state" to the chore
+    return this.chore.getNamespaceQuotaSnapshot(namespace);
+  }
+
+  @Override
+  public SpaceQuotaSnapshot getTargetState(String subject, SpaceQuota spaceQuota) {
+    rlock.lock();
+    try {
+      final long sizeLimitInBytes = spaceQuota.getSoftLimit();
+      long sum = 0L;
+      for (Entry<HRegionInfo,Long> entry : filterBySubject(subject)) {
+        sum += entry.getValue();
+      }
+      // Observance is defined as the size of the table being less than the limit
+      SpaceQuotaStatus status = sum <= sizeLimitInBytes ? SpaceQuotaStatus.notInViolation()
+          : new SpaceQuotaStatus(ProtobufUtil.toViolationPolicy(spaceQuota.getViolationPolicy()));
+      return new SpaceQuotaSnapshot(status, sum, sizeLimitInBytes);
+    } finally {
+      rlock.unlock();
+    }
+  }
+
+  @Override
+  public Iterable<Entry<HRegionInfo,Long>> filterBySubject(String namespace) {
+    rlock.lock();
+    try {
+      return Iterables.filter(regionUsage.entrySet(), new Predicate<Entry<HRegionInfo,Long>>() {
+        @Override
+        public boolean apply(Entry<HRegionInfo,Long> input) {
+          return namespace.equals(input.getKey().getTable().getNamespaceAsString());
+        }
+      });
+    } finally {
+      rlock.unlock();
+    }
+  }
+
+  @Override
+  public void setCurrentState(String namespace, SpaceQuotaSnapshot snapshot) {
+    // Defer the "current state" to the chore
+    this.chore.setNamespaceQuotaSnapshot(namespace, snapshot);
+  }
+
+  @Override
+  public void setRegionUsage(Map<HRegionInfo,Long> regionUsage) {
+    wlock.lock();
+    try {
+      this.regionUsage = Objects.requireNonNull(regionUsage);
+    } finally {
+      wlock.unlock();
+    }
+  }
+}

http://git-wip-us.apache.org/repos/asf/hbase/blob/7e4383e1/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NamespaceQuotaViolationStore.java
----------------------------------------------------------------------
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NamespaceQuotaViolationStore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NamespaceQuotaViolationStore.java
deleted file mode 100644
index 017ecec..0000000
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NamespaceQuotaViolationStore.java
+++ /dev/null
@@ -1,127 +0,0 @@
-/*
- * 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.hbase.quotas;
-
-import java.io.IOException;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Map.Entry;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock;
-
-import org.apache.hadoop.hbase.HRegionInfo;
-import org.apache.hadoop.hbase.classification.InterfaceAudience;
-import org.apache.hadoop.hbase.client.Connection;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.QuotaProtos.Quotas;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.QuotaProtos.SpaceQuota;
-
-import com.google.common.base.Predicate;
-import com.google.common.collect.Iterables;
-
-/**
- * {@link QuotaViolationStore} implementation for namespaces.
- */
-@InterfaceAudience.Private
-public class NamespaceQuotaViolationStore implements QuotaViolationStore<String> {
-  private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
-  private final ReadLock rlock = lock.readLock();
-  private final WriteLock wlock = lock.writeLock();
-
-  private final Connection conn;
-  private final QuotaObserverChore chore;
-  private Map<HRegionInfo,Long> regionUsage;
-
-  public NamespaceQuotaViolationStore(Connection conn, QuotaObserverChore chore, Map<HRegionInfo,Long> regionUsage) {
-    this.conn = Objects.requireNonNull(conn);
-    this.chore = Objects.requireNonNull(chore);
-    this.regionUsage = Objects.requireNonNull(regionUsage);
-  }
-
-  @Override
-  public SpaceQuota getSpaceQuota(String namespace) throws IOException {
-    Quotas quotas = getQuotaForNamespace(namespace);
-    if (null != quotas && quotas.hasSpace()) {
-      return quotas.getSpace();
-    }
-    return null;
-  }
-
-  /**
-   * Fetches the namespace quota. Visible for mocking/testing.
-   */
-  Quotas getQuotaForNamespace(String namespace) throws IOException {
-    return QuotaTableUtil.getNamespaceQuota(conn, namespace);
-  }
-
-  @Override
-  public ViolationState getCurrentState(String namespace) {
-    // Defer the "current state" to the chore
-    return this.chore.getNamespaceQuotaViolation(namespace);
-  }
-
-  @Override
-  public ViolationState getTargetState(String subject, SpaceQuota spaceQuota) {
-    rlock.lock();
-    try {
-      final long sizeLimitInBytes = spaceQuota.getSoftLimit();
-      long sum = 0L;
-      for (Entry<HRegionInfo,Long> entry : filterBySubject(subject)) {
-        sum += entry.getValue();
-        if (sum > sizeLimitInBytes) {
-          // Short-circuit early
-          return ViolationState.IN_VIOLATION;
-        }
-      }
-      // Observance is defined as the size of the table being less than the limit
-      return sum <= sizeLimitInBytes ? ViolationState.IN_OBSERVANCE : ViolationState.IN_VIOLATION;
-    } finally {
-      rlock.unlock();
-    }
-  }
-
-  @Override
-  public Iterable<Entry<HRegionInfo,Long>> filterBySubject(String namespace) {
-    rlock.lock();
-    try {
-      return Iterables.filter(regionUsage.entrySet(), new Predicate<Entry<HRegionInfo,Long>>() {
-        @Override
-        public boolean apply(Entry<HRegionInfo,Long> input) {
-          return namespace.equals(input.getKey().getTable().getNamespaceAsString());
-        }
-      });
-    } finally {
-      rlock.unlock();
-    }
-  }
-
-  @Override
-  public void setCurrentState(String namespace, ViolationState state) {
-    // Defer the "current state" to the chore
-    this.chore.setNamespaceQuotaViolation(namespace, state);
-  }
-
-  @Override
-  public void setRegionUsage(Map<HRegionInfo,Long> regionUsage) {
-    wlock.lock();
-    try {
-      this.regionUsage = Objects.requireNonNull(regionUsage);
-    } finally {
-      wlock.unlock();
-    }
-  }
-}


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