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Added interface for managing token caches
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modules/core/src/main/java/org/apache/synapse/endpoints/auth/oauth/TokenCacheFactory.java
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| /* | ||
| * Copyright (c) 2024, WSO2 LLC. (https://www.wso2.com/). | ||
| * | ||
| * WSO2 LLC. 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. | ||
| */ | ||
|
|
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| package org.apache.synapse.endpoints.auth.oauth; | ||
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| import org.apache.synapse.SynapseException; | ||
| import org.apache.synapse.config.SynapsePropertiesLoader; | ||
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| import java.lang.reflect.InvocationTargetException; | ||
| import java.lang.reflect.Method; | ||
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| /** | ||
| * Factory class responsible for providing the appropriate implementation of the TokenCacheProvider interface. | ||
| * This class manages the singleton instance of TokenCacheProvider, ensuring that it is only loaded once and reused | ||
| * across the application. | ||
| */ | ||
| public class TokenCacheFactory { | ||
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|
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| /** | ||
| * Singleton instance of TokenCacheProvider. This will be initialized the first time, and the same instance will be | ||
| * returned on subsequent calls. | ||
| */ | ||
| private static TokenCacheProvider tokenCacheProvider; | ||
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|
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| /** | ||
| * Retrieves the singleton instance of TokenCacheProvider. If the instance is not already initialized, | ||
| * it attempts to load the provider class specified in the `token.cache.class` property. If the property | ||
| * is not set or the class cannot be loaded, it defaults to the TokenCache implementation. | ||
| * | ||
| * @return the singleton instance of TokenCacheProvider | ||
| * @throws SynapseException if there is an error loading the specified class | ||
| */ | ||
| public static TokenCacheProvider getTokenCache() { | ||
| if (tokenCacheProvider != null) { | ||
| return tokenCacheProvider; | ||
| } | ||
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| String classPath = SynapsePropertiesLoader.loadSynapseProperties().getProperty("token.cache.class"); | ||
| if (classPath != null) { | ||
| tokenCacheProvider = loadTokenCacheProvider(classPath); | ||
| } else { | ||
| tokenCacheProvider = TokenCache.getInstance(); | ||
| } | ||
| return tokenCacheProvider; | ||
| } | ||
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| /** | ||
| * Loads the TokenCacheProvider implementation specified by the given class path. | ||
| * | ||
| * @param classPath the fully qualified class path of the TokenCacheProvider implementation | ||
| * @return an instance of the specified TokenCacheProvider implementation | ||
| * @throws SynapseException if there is an error loading the class or invoking the `getInstance` method | ||
| */ | ||
| private static TokenCacheProvider loadTokenCacheProvider(String classPath) { | ||
| try { | ||
| Class<?> clazz = Class.forName(classPath); | ||
| Method getInstanceMethod = clazz.getMethod("getInstance"); | ||
| return (TokenCacheProvider) getInstanceMethod.invoke(null); | ||
| } catch (ClassNotFoundException e) { | ||
| throw new SynapseException("Error loading class: " + classPath, e); | ||
| } catch (NoSuchMethodException e) { | ||
| throw new SynapseException("getInstance method not found for class: " + classPath, e); | ||
| } catch (InvocationTargetException | IllegalAccessException e) { | ||
| throw new SynapseException("Error invoking getInstance method for class: " + classPath, e); | ||
| } | ||
| } | ||
| } |
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