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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.binding;

import com.mongodb.ReadPreference;
import com.mongodb.RequestContext;
import com.mongodb.ServerApi;
import com.mongodb.internal.async.SingleResultCallback;
import com.mongodb.connection.ServerDescription;
import com.mongodb.internal.connection.AsyncConnection;
import com.mongodb.internal.session.SessionContext;
import com.mongodb.lang.Nullable;

/**
 * A source of connections to a single MongoDB server.
 *
 * This class is not part of the public API and may be removed or changed at any time
 */
public interface AsyncConnectionSource extends ReferenceCounted {

    /**
     * Gets the current description of this source.
     *
     * @return the current details of the server state.
     */
    ServerDescription getServerDescription();

    /**
     * Gets the session context for this source
     *
     * @return the session context, which may not be null
     *
     * This class is not part of the public API and may be removed or changed at any time
     */
    SessionContext getSessionContext();

    @Nullable
    ServerApi getServerApi();

    RequestContext getRequestContext();

    /**
     * Gets the read preference that was applied when selecting this source.
     *
     * @see AsyncReadBinding#getReadConnectionSource(int, ReadPreference, SingleResultCallback)
     */
    ReadPreference getReadPreference();

    /**
     * Gets a connection from this source.
     *
     * @param callback the to be passed the connection
     */
    void getConnection(SingleResultCallback callback);

    @Override
    AsyncConnectionSource retain();
}