/*
 * 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.client;

import com.mongodb.ServerAddress;
import com.mongodb.TransactionOptions;
import com.mongodb.lang.Nullable;

A client session that supports transactions.
Since:
3.8/**
 * A client session that supports transactions.
 *
 * @since 3.8
 */
public interface ClientSession extends com.mongodb.session.ClientSession {
    
Returns the server address of the pinned mongos on this session.
Returns:
the server address of the pinned mongos.
@mongodb.server.release
4.2
Since:
3.11/**
     * Returns the server address of the pinned mongos on this session.
     *
     * @return the server address of the pinned mongos.
     * @mongodb.server.release 4.2
     * @since 3.11
     */
    @Nullable
    ServerAddress getPinnedServerAddress();

    
Pin the server address of the mongos on this session.
Params:
address – the server address to pin to this session
@mongodb.server.release
4.2
Since:
3.11/**
     * Pin the server address of the mongos on this session.
     *
     * @param address the server address to pin to this session
     * @mongodb.server.release 4.2
     * @since 3.11
     */
    void setPinnedServerAddress(@Nullable ServerAddress address);

    
Returns true if there is an active transaction on this session, and false otherwise
Returns:
true if there is an active transaction on this session
@mongodb.server.release
4.0/**
     * Returns true if there is an active transaction on this session, and false otherwise
     *
     * @return true if there is an active transaction on this session
     * @mongodb.server.release 4.0
     */
    boolean hasActiveTransaction();

    
 Notify the client session that a message has been sent.
 

     For internal use only
 
Returns:
true if this is the first message sent, false otherwise/**
     *  Notify the client session that a message has been sent.
     *  <p>
     *      For internal use only
     *  </p>
     *
     * @return true if this is the first message sent, false otherwise
     */
    boolean notifyMessageSent();

    
Gets the transaction options.  Only call this method of the session has an active transaction
Returns:
the transaction options/**
     * Gets the transaction options.  Only call this method of the session has an active transaction
     *
     * @return the transaction options
     */
    TransactionOptions getTransactionOptions();

    
Start a transaction in the context of this session with default transaction options. A transaction can not be started if there is
already an active transaction on this session.
@mongodb.server.release
4.0/**
     * Start a transaction in the context of this session with default transaction options. A transaction can not be started if there is
     * already an active transaction on this session.
     *
     * @mongodb.server.release 4.0
     */
    void startTransaction();

    
Start a transaction in the context of this session with the given transaction options. A transaction can not be started if there is
already an active transaction on this session.
Params:
transactionOptions – the options to apply to the transaction
@mongodb.server.release
4.0/**
     * Start a transaction in the context of this session with the given transaction options. A transaction can not be started if there is
     * already an active transaction on this session.
     *
     * @param transactionOptions the options to apply to the transaction
     *
     * @mongodb.server.release 4.0
     */
    void startTransaction(TransactionOptions transactionOptions);

    
Commit a transaction in the context of this session.  A transaction can only be commmited if one has first been started.
@mongodb.server.release
4.0/**
     * Commit a transaction in the context of this session.  A transaction can only be commmited if one has first been started.
     *
     * @mongodb.server.release 4.0
     */
    void commitTransaction();

    
Abort a transaction in the context of this session.  A transaction can only be aborted if one has first been started.
@mongodb.server.release
4.0/**
     * Abort a transaction in the context of this session.  A transaction can only be aborted if one has first been started.
     *
     * @mongodb.server.release 4.0
     */
    void abortTransaction();

    
Execute the given function within a transaction.
Params:
transactionBody – the body of the transaction
Type parameters:
<T> – the return type of the transaction body
Returns:
the return value of the transaction body
@mongodb.server.release
4.0
Since:
3.11/**
     * Execute the given function within a transaction.
     *
     * @param <T> the return type of the transaction body
     * @param transactionBody the body of the transaction
     * @return the return value of the transaction body
     * @mongodb.server.release 4.0
     * @since 3.11
     */
    <T> T withTransaction(TransactionBody<T> transactionBody);

    
Execute the given function within a transaction.
Params:
transactionBody – the body of the transaction
options –         the transaction options
Type parameters:
<T> – the return type of the transaction body
Returns:
the return value of the transaction body
@mongodb.server.release
4.0
Since:
3.11/**
     * Execute the given function within a transaction.
     *
     * @param <T> the return type of the transaction body
     * @param transactionBody the body of the transaction
     * @param options         the transaction options
     * @return the return value of the transaction body
     * @mongodb.server.release 4.0
     * @since 3.11
     */
    <T> T withTransaction(TransactionBody<T> transactionBody, TransactionOptions options);
}