001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.master.http.gson; 019 020import java.util.function.Supplier; 021import javax.inject.Singleton; 022import org.apache.hadoop.hbase.http.gson.GsonMessageBodyWriter; 023import org.apache.hadoop.hbase.http.jersey.SupplierFactoryAdapter; 024import org.apache.yetus.audience.InterfaceAudience; 025 026import org.apache.hbase.thirdparty.com.google.gson.Gson; 027import org.apache.hbase.thirdparty.javax.ws.rs.core.Feature; 028import org.apache.hbase.thirdparty.javax.ws.rs.core.FeatureContext; 029import org.apache.hbase.thirdparty.javax.ws.rs.ext.MessageBodyWriter; 030import org.apache.hbase.thirdparty.org.glassfish.hk2.utilities.binding.AbstractBinder; 031import org.apache.hbase.thirdparty.org.glassfish.hk2.utilities.binding.ServiceBindingBuilder; 032 033/** 034 * Used to register with (shaded) Jersey the presence of Entity serialization using (shaded) Gson. 035 */ 036@InterfaceAudience.Private 037public class GsonSerializationFeature implements Feature { 038 039 @Override 040 public boolean configure(FeatureContext context) { 041 context.register(new Binder()); 042 return true; 043 } 044 045 /** 046 * Register this feature's provided functionality and defines their lifetime scopes. 047 */ 048 private static class Binder extends AbstractBinder { 049 050 @Override 051 protected void configure() { 052 bindFactory(GsonFactory::buildGson).to(Gson.class).in(Singleton.class); 053 bind(GsonMessageBodyWriter.class).to(MessageBodyWriter.class).in(Singleton.class); 054 } 055 056 /** 057 * Helper method for smoothing over use of {@link SupplierFactoryAdapter}. Inspired by internal 058 * implementation details of jersey itself. 059 */ 060 private <T> ServiceBindingBuilder<T> bindFactory(Supplier<T> supplier) { 061 return bindFactory(new SupplierFactoryAdapter<>(supplier)); 062 } 063 } 064}