1 /** 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 package org.apache.hadoop.hbase.ipc; 19 20 import org.apache.hadoop.classification.InterfaceAudience; 21 22 /** 23 * Utility for managing the flag byte passed in response to a 24 * {@link HBaseServer.Call} 25 */ 26 @InterfaceAudience.Private 27 class ResponseFlag { 28 private static final byte ERROR_BIT = 0x1; 29 private static final byte LENGTH_BIT = 0x2; 30 31 private ResponseFlag() { 32 // Make it so this class cannot be constructed. 33 } 34 35 static boolean isError(final byte flag) { 36 return (flag & ERROR_BIT) != 0; 37 } 38 39 static boolean isLength(final byte flag) { 40 return (flag & LENGTH_BIT) != 0; 41 } 42 43 static byte getLengthSetOnly() { 44 return LENGTH_BIT; 45 } 46 47 static byte getErrorAndLengthSet() { 48 return LENGTH_BIT | ERROR_BIT; 49 } 50 }