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A Reactive Streams implementation of the MongoDB Java driver
/*
* 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.reactivestreams.client;
import com.mongodb.ClientSessionOptions;
import com.mongodb.annotations.Immutable;
import com.mongodb.connection.ClusterDescription;
import com.mongodb.connection.ClusterSettings;
import com.mongodb.event.ClusterListener;
import org.bson.Document;
import org.bson.conversions.Bson;
import org.reactivestreams.Publisher;
import java.io.Closeable;
import java.util.List;
/**
* A client-side representation of a MongoDB cluster. Instances can represent either a standalone MongoDB instance, a replica set,
* or a sharded cluster. Instance of this class are responsible for maintaining an up-to-date state of the cluster,
* and possibly cache resources related to this, including background threads for monitoring, and connection pools.
*
* Instance of this class server as factories for {@code MongoDatabase} instances.
*
*
* @since 1.0
*/
@Immutable
public interface MongoClient extends Closeable {
/**
* Gets the database with the given name.
*
* @param name the name of the database
* @return the database
*/
MongoDatabase getDatabase(String name);
/**
* Close the client, which will close all underlying cached resources, including, for example,
* sockets and background monitoring threads.
*/
void close();
/**
* Get a list of the database names
*
* @mongodb.driver.manual reference/commands/listDatabases List Databases
* @return an iterable containing all the names of all the databases
*/
Publisher listDatabaseNames();
/**
* Get a list of the database names
*
* @param clientSession the client session with which to associate this operation
* @mongodb.driver.manual reference/commands/listDatabases List Databases
* @return an iterable containing all the names of all the databases
*
* @mongodb.server.release 3.6
* @since 1.7
*/
Publisher listDatabaseNames(ClientSession clientSession);
/**
* Gets the list of databases
*
* @return the fluent list databases interface
*/
ListDatabasesPublisher listDatabases();
/**
* Gets the list of databases
*
* @param clazz the class to cast the database documents to
* @param the type of the class to use instead of {@code Document}.
* @return the fluent list databases interface
*/
ListDatabasesPublisher listDatabases(Class clazz);
/**
* Gets the list of databases
*
* @param clientSession the client session with which to associate this operation
* @return the fluent list databases interface
* @mongodb.server.release 3.6
* @since 1.7
*/
ListDatabasesPublisher listDatabases(ClientSession clientSession);
/**
* Gets the list of databases
*
* @param clientSession the client session with which to associate this operation
* @param clazz the class to cast the database documents to
* @param the type of the class to use instead of {@code Document}.
* @return the fluent list databases interface
* @mongodb.server.release 3.6
* @since 1.7
*/
ListDatabasesPublisher listDatabases(ClientSession clientSession, Class clazz);
/**
* Creates a change stream for this client.
*
* @return the change stream iterable
* @mongodb.driver.dochub core/changestreams Change Streams
* @since 1.9
* @mongodb.server.release 4.0
*/
ChangeStreamPublisher watch();
/**
* Creates a change stream for this client.
*
* @param resultClass the class to decode each document into
* @param the target document type of the iterable.
* @return the change stream iterable
* @mongodb.driver.dochub core/changestreams Change Streams
* @since 1.9
* @mongodb.server.release 4.0
*/
ChangeStreamPublisher watch(Class resultClass);
/**
* Creates a change stream for this client.
*
* @param pipeline the aggregation pipeline to apply to the change stream.
* @return the change stream iterable
* @mongodb.driver.dochub core/changestreams Change Streams
* @since 1.9
* @mongodb.server.release 4.0
*/
ChangeStreamPublisher watch(List pipeline);
/**
* Creates a change stream for this client.
*
* @param pipeline the aggregation pipeline to apply to the change stream
* @param resultClass the class to decode each document into
* @param the target document type of the iterable.
* @return the change stream iterable
* @mongodb.driver.dochub core/changestreams Change Streams
* @since 1.9
* @mongodb.server.release 4.0
*/
ChangeStreamPublisher watch(List pipeline, Class resultClass);
/**
* Creates a change stream for this client.
*
* @param clientSession the client session with which to associate this operation
* @return the change stream iterable
* @since 1.9
* @mongodb.server.release 4.0
* @mongodb.driver.dochub core/changestreams Change Streams
*/
ChangeStreamPublisher watch(ClientSession clientSession);
/**
* Creates a change stream for this client.
*
* @param clientSession the client session with which to associate this operation
* @param resultClass the class to decode each document into
* @param the target document type of the iterable.
* @return the change stream iterable
* @since 1.9
* @mongodb.server.release 4.0
* @mongodb.driver.dochub core/changestreams Change Streams
*/
ChangeStreamPublisher watch(ClientSession clientSession, Class resultClass);
/**
* Creates a change stream for this client.
*
* @param clientSession the client session with which to associate this operation
* @param pipeline the aggregation pipeline to apply to the change stream.
* @return the change stream iterable
* @since 1.9
* @mongodb.server.release 4.0
* @mongodb.driver.dochub core/changestreams Change Streams
*/
ChangeStreamPublisher watch(ClientSession clientSession, List pipeline);
/**
* Creates a change stream for this client.
*
* @param clientSession the client session with which to associate this operation
* @param pipeline the aggregation pipeline to apply to the change stream
* @param resultClass the class to decode each document into
* @param the target document type of the iterable.
* @return the change stream iterable
* @since 1.9
* @mongodb.server.release 4.0
* @mongodb.driver.dochub core/changestreams Change Streams
*/
ChangeStreamPublisher watch(ClientSession clientSession, List pipeline, Class resultClass);
/**
* Creates a client session.
*
* @return a publisher for the client session.
* @mongodb.server.release 3.6
* @since 1.9
*/
Publisher startSession();
/**
* Creates a client session.
*
* @param options the options for the client session
* @return a publisher for the client session.
* @mongodb.server.release 3.6
* @since 1.7
*/
Publisher startSession(ClientSessionOptions options);
/**
* Gets the current cluster description.
*
*
* This method will not block, meaning that it may return a {@link ClusterDescription} whose {@code clusterType} is unknown
* and whose {@link com.mongodb.connection.ServerDescription}s are all in the connecting state. If the application requires
* notifications after the driver has connected to a member of the cluster, it should register a {@link ClusterListener} via
* the {@link ClusterSettings} in {@link com.mongodb.MongoClientSettings}.
*
*
* @return the current cluster description
* @see ClusterSettings.Builder#addClusterListener(ClusterListener)
* @see com.mongodb.MongoClientSettings.Builder#applyToClusterSettings(com.mongodb.Block)
* @since 4.1
*/
ClusterDescription getClusterDescription();
}
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