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The Java operations layer for the MongoDB Java Driver. Third parties can wrap this layer to provide custom higher-level APIs

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/*
 * Copyright 2008-present MongoDB, Inc.
 *
 * Licensed 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 com.mongodb.internal.connection;

import com.mongodb.AuthenticationMechanism;
import com.mongodb.MongoCredential;
import com.mongodb.lang.Nullable;

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.StampedLock;

import static com.mongodb.internal.Locks.withInterruptibleLock;
import static com.mongodb.internal.connection.OidcAuthenticator.OidcCacheEntry;

/**
 * 

This class is not part of the public API and may be removed or changed at any time

*/ public class MongoCredentialWithCache { private final MongoCredential credential; private final Cache cache; public MongoCredentialWithCache(final MongoCredential credential) { this(credential, new Cache()); } private MongoCredentialWithCache(final MongoCredential credential, final Cache cache) { this.credential = credential; this.cache = cache; } public MongoCredentialWithCache withMechanism(final AuthenticationMechanism mechanism) { return new MongoCredentialWithCache(credential.withMechanism(mechanism), cache); } @Nullable public AuthenticationMechanism getAuthenticationMechanism() { return credential.getAuthenticationMechanism(); } public MongoCredential getCredential() { return credential; } @Nullable public T getFromCache(final Object key, final Class clazz) { return clazz.cast(cache.get(key)); } public void putInCache(final Object key, final Object value) { cache.set(key, value); } OidcCacheEntry getOidcCacheEntry() { return cache.oidcCacheEntry; } void setOidcCacheEntry(final OidcCacheEntry oidcCacheEntry) { this.cache.oidcCacheEntry = oidcCacheEntry; } StampedLock getOidcLock() { return cache.oidcLock; } public Lock getLock() { return cache.lock; } /** * Stores any state associated with the credential. */ static class Cache { private final ReentrantLock lock = new ReentrantLock(); private Object cacheKey; private Object cacheValue; private final StampedLock oidcLock = new StampedLock(); private volatile OidcCacheEntry oidcCacheEntry = new OidcCacheEntry(); Object get(final Object key) { return withInterruptibleLock(lock, () -> { if (cacheKey != null && cacheKey.equals(key)) { return cacheValue; } return null; }); } void set(final Object key, final Object value) { withInterruptibleLock(lock, () -> { cacheKey = key; cacheValue = value; }); } } }




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