weihu
2 years ago
parent
36883df98c
commit
c39062c158
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/*
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* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*
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*/
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package com.tencent.cloud.polaris.config.util;
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import com.google.inject.AbstractModule;
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import com.google.inject.Guice;
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import com.google.inject.Injector;
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import com.google.inject.Singleton;
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import com.tencent.cloud.polaris.config.exceptions.PolarisConfigException;
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import com.tencent.cloud.polaris.config.spring.property.PlaceholderHelper;
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import com.tencent.cloud.polaris.config.spring.property.SpringValueRegistry;
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/**
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*@author : wh
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*@date : 2022/6/28 09:30
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*@description:
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*/
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public class SpringInjector {
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private static volatile Injector s_injector;
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private static final Object lock = new Object();
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private static Injector getInjector() {
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if (s_injector == null) {
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synchronized (lock) {
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if (s_injector == null) {
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try {
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s_injector = Guice.createInjector(new SpringModule());
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}
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catch (Throwable ex) {
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PolarisConfigException exception = new PolarisConfigException("Unable to initialize Apollo Spring Injector!", ex);
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throw exception;
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}
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}
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}
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}
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return s_injector;
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}
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public static <T> T getInstance(Class<T> clazz) {
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try {
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return getInjector().getInstance(clazz);
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}
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catch (Throwable ex) {
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throw new PolarisConfigException(
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String.format("Unable to load instance for %s!", clazz.getName()), ex);
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}
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}
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private static class SpringModule extends AbstractModule {
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@Override
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protected void configure() {
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bind(PlaceholderHelper.class).in(Singleton.class);
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// bind(ConfigPropertySourceFactory.class).in(Singleton.class);
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bind(SpringValueRegistry.class).in(Singleton.class);
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}
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}
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}
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