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MongoClientWrapper.java
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MongoClientWrapper.java
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/*
* Copyright (c) 2017 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.internal.utils.persistence.mongo;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.time.Duration;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeUnit;
import javax.annotation.Nullable;
import javax.annotation.concurrent.NotThreadSafe;
import javax.net.ssl.SSLContext;
import org.bson.Document;
import org.bson.conversions.Bson;
import org.eclipse.ditto.internal.utils.persistence.mongo.config.MongoDbConfig;
import org.reactivestreams.Publisher;
import com.mongodb.ClientSessionOptions;
import com.mongodb.ConnectionString;
import com.mongodb.MongoClientSettings;
import com.mongodb.ReadConcern;
import com.mongodb.ReadPreference;
import com.mongodb.ServerAddress;
import com.mongodb.WriteConcern;
import com.mongodb.connection.ClusterDescription;
import com.mongodb.connection.ServerDescription;
import com.mongodb.connection.netty.NettyStreamFactoryFactory;
import com.mongodb.event.CommandListener;
import com.mongodb.event.ConnectionPoolListener;
import com.mongodb.management.JMXConnectionPoolListener;
import com.mongodb.reactivestreams.client.ChangeStreamPublisher;
import com.mongodb.reactivestreams.client.ClientSession;
import com.mongodb.reactivestreams.client.ListDatabasesPublisher;
import com.mongodb.reactivestreams.client.MongoClient;
import com.mongodb.reactivestreams.client.MongoClients;
import com.mongodb.reactivestreams.client.MongoCollection;
import com.mongodb.reactivestreams.client.MongoDatabase;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
/**
* Default implementation of DittoMongoClient.
*/
@NotThreadSafe
public final class MongoClientWrapper implements DittoMongoClient {
private final MongoClient mongoClient;
private final MongoClientSettings clientSettings;
private final MongoDatabase defaultDatabase;
private final DittoMongoClientSettings dittoMongoClientSettings;
@Nullable private final EventLoopGroup eventLoopGroup;
private MongoClientWrapper(final MongoClientSettings clientSettings,
final String defaultDatabaseName,
final DittoMongoClientSettings theDittoMongoClientSettings,
@Nullable final EventLoopGroup theEventLoopGroup) {
this.clientSettings = clientSettings;
mongoClient = MongoClients.create(clientSettings);
defaultDatabase = mongoClient.getDatabase(defaultDatabaseName);
dittoMongoClientSettings = theDittoMongoClientSettings;
eventLoopGroup = theEventLoopGroup;
}
/**
* Initializes the persistence with a passed in {@code config} containing the MongoDB URI.
*
* @param mongoDbConfig provides MongoDB settings including the URI.
* @return a new {@code MongoClientWrapper} object.
* @throws NullPointerException if {@code mongoDbConfig} is {@code null}.
*/
public static MongoClientWrapper newInstance(final MongoDbConfig mongoDbConfig) {
return (MongoClientWrapper) getBuilder(mongoDbConfig).build();
}
/**
* Returns a new builder for creating an instance of {@code MongoClientWrapper} from scratch.
*
* @return the new builder instance.
*/
public static DittoMongoClientBuilder.ConnectionCoordinatesStep getBuilder() {
return MongoClientWrapperBuilder.newInstance();
}
/**
* Returns a new builder for creating an instance of {@code MongoClientWrapper} from scratch.
*
* @param mongoDbConfig provides the initial MongoDB settings of the returned builder.
* @return the new builder instance.
* @throws NullPointerException if {@code mongoConfig} is {@code null}.
*/
public static DittoMongoClientBuilder.GeneralPropertiesStep getBuilder(final MongoDbConfig mongoDbConfig) {
return MongoClientWrapperBuilder.newInstance(mongoDbConfig);
}
@Override
public MongoDatabase getDefaultDatabase() {
return defaultDatabase;
}
@Override
public MongoCollection<Document> getCollection(final CharSequence name) {
return defaultDatabase.getCollection(checkNotNull(name, "collection name").toString());
}
@Override
public DittoMongoClientSettings getDittoSettings() {
return dittoMongoClientSettings;
}
@Override
public MongoDatabase getDatabase(final String name) {
return mongoClient.getDatabase(name);
}
@Override
public Publisher<String> listDatabaseNames() {
return mongoClient.listDatabaseNames();
}
@Override
public Publisher<String> listDatabaseNames(final ClientSession clientSession) {
return mongoClient.listDatabaseNames(clientSession);
}
@Override
public ListDatabasesPublisher<Document> listDatabases() {
return mongoClient.listDatabases();
}
@Override
public <TResult> ListDatabasesPublisher<TResult> listDatabases(final Class<TResult> clazz) {
return mongoClient.listDatabases(clazz);
}
@Override
public ListDatabasesPublisher<Document> listDatabases(final ClientSession clientSession) {
return mongoClient.listDatabases(clientSession);
}
@Override
public <TResult> ListDatabasesPublisher<TResult> listDatabases(final ClientSession clientSession,
final Class<TResult> clazz) {
return mongoClient.listDatabases(clientSession, clazz);
}
@Override
public ChangeStreamPublisher<Document> watch() {
return mongoClient.watch();
}
@Override
public <TResult> ChangeStreamPublisher<TResult> watch(final Class<TResult> tResultClass) {
return mongoClient.watch(tResultClass);
}
@Override
public ChangeStreamPublisher<Document> watch(final List<? extends Bson> pipeline) {
return mongoClient.watch(pipeline);
}
@Override
public <TResult> ChangeStreamPublisher<TResult> watch(final List<? extends Bson> pipeline,
final Class<TResult> tResultClass) {
return mongoClient.watch(pipeline, tResultClass);
}
@Override
public ChangeStreamPublisher<Document> watch(final ClientSession clientSession) {
return mongoClient.watch(clientSession);
}
@Override
public <TResult> ChangeStreamPublisher<TResult> watch(final ClientSession clientSession,
final Class<TResult> tResultClass) {
return mongoClient.watch(clientSession, tResultClass);
}
@Override
public ChangeStreamPublisher<Document> watch(final ClientSession clientSession,
final List<? extends Bson> pipeline) {
return mongoClient.watch(clientSession, pipeline);
}
@Override
public <TResult> ChangeStreamPublisher<TResult> watch(final ClientSession clientSession,
final List<? extends Bson> pipeline, final Class<TResult> tResultClass) {
return mongoClient.watch(clientSession, pipeline, tResultClass);
}
@Override
public Publisher<ClientSession> startSession() {
return mongoClient.startSession();
}
@Override
public Publisher<ClientSession> startSession(final ClientSessionOptions options) {
return mongoClient.startSession(options);
}
@Override
public MongoClientSettings getClientSettings() {
return clientSettings;
}
@Override
public int getMaxWireVersion() {
return mongoClient.getClusterDescription()
.getServerDescriptions()
.stream()
.mapToInt(ServerDescription::getMaxWireVersion)
.max()
.orElse(0);
}
@Override
public ClusterDescription getClusterDescription() {
return mongoClient.getClusterDescription();
}
@Override
public void close() {
if (null != eventLoopGroup) {
eventLoopGroup.shutdownGracefully();
}
mongoClient.close();
}
@NotThreadSafe
static final class MongoClientWrapperBuilder implements DittoMongoClientBuilder,
DittoMongoClientBuilder.ConnectionCoordinatesStep,
DittoMongoClientBuilder.DatabaseNameStep,
DittoMongoClientBuilder.GeneralPropertiesStep {
private final MongoClientSettings.Builder mongoClientSettingsBuilder;
private final DittoMongoClientSettings.Builder dittoMongoClientSettingsBuilder;
@Nullable private ConnectionString connectionString;
private String defaultDatabaseName;
private boolean sslEnabled;
@Nullable private EventLoopGroup eventLoopGroup;
private MongoClientWrapperBuilder() {
mongoClientSettingsBuilder = MongoClientSettings.builder();
mongoClientSettingsBuilder.readPreference(ReadPreference.primaryPreferred());
dittoMongoClientSettingsBuilder = DittoMongoClientSettings.getBuilder();
connectionString = null;
defaultDatabaseName = null;
sslEnabled = false;
eventLoopGroup = null;
}
/**
* Returns a new instance of {@code MongoClientWrapperBuilder}
*
* @return the new builder.
*/
static ConnectionCoordinatesStep newInstance() {
return new MongoClientWrapperBuilder();
}
/**
* Returns a new instance of {@code MongoClientWrapperBuilder} at the step for adding general properties or
* building the client instance.
*
* @param mongoDbConfig the config which provides settings for MongoDB.
* @return the new builder.
* @throws NullPointerException if {@code mongoConfig} is {@code null}.
*/
static GeneralPropertiesStep newInstance(final MongoDbConfig mongoDbConfig) {
checkNotNull(mongoDbConfig, "MongoDB config");
final MongoClientWrapperBuilder builder = new MongoClientWrapperBuilder();
builder.maxQueryTime(mongoDbConfig.getMaxQueryTime());
builder.documentDbCompatibilityMode(mongoDbConfig.isDocumentDBCompatibilityMode());
builder.connectionString(mongoDbConfig.getMongoDbUri());
final MongoDbConfig.ConnectionPoolConfig connectionPoolConfig = mongoDbConfig.getConnectionPoolConfig();
builder.connectionPoolMinSize(connectionPoolConfig.getMinSize());
builder.connectionPoolMaxSize(connectionPoolConfig.getMaxSize());
if (!connectionPoolConfig.getMaxIdleTime().isNegative()) {
builder.connectionPoolMaxIdleTime(connectionPoolConfig.getMaxIdleTime());
}
builder.connectionPoolMaxWaitTime(connectionPoolConfig.getMaxWaitTime());
builder.enableJmxListener(connectionPoolConfig.isJmxListenerEnabled());
final MongoDbConfig.OptionsConfig optionsConfig = mongoDbConfig.getOptionsConfig();
builder.enableSsl(optionsConfig.isSslEnabled());
builder.setReadPreference(optionsConfig.readPreference().getMongoReadPreference());
builder.setReadConcern(optionsConfig.readConcern().getMongoReadConcern());
builder.setWriteConcern(optionsConfig.writeConcern());
builder.setRetryWrites(optionsConfig.isRetryWrites());
return builder;
}
@Override
public GeneralPropertiesStep connectionString(final String string) {
connectionString = new ConnectionString(checkNotNull(string, "connection string"));
mongoClientSettingsBuilder.applyConnectionString(connectionString);
defaultDatabaseName = connectionString.getDatabase();
return this;
}
@Override
public MongoClientWrapperBuilder enableSsl(final boolean enabled) {
sslEnabled = enabled;
return this;
}
@Override
public GeneralPropertiesStep maxQueryTime(@Nullable final Duration maxQueryTime) {
dittoMongoClientSettingsBuilder.maxQueryTime(maxQueryTime);
return this;
}
@Override
public GeneralPropertiesStep documentDbCompatibilityMode(final boolean documentDbCompatibilityMode) {
dittoMongoClientSettingsBuilder.documentDbCompatibilityMode(documentDbCompatibilityMode);
return this;
}
@Override
public DatabaseNameStep hostnameAndPort(final CharSequence hostname, final int portNumber) {
checkNotNull(hostname, "hostname");
mongoClientSettingsBuilder.applyToClusterSettings(builder -> builder
.hosts(Collections.singletonList(new ServerAddress(hostname.toString(), portNumber)))
.build());
return this;
}
@Override
public GeneralPropertiesStep defaultDatabaseName(final CharSequence databaseName) {
defaultDatabaseName = checkNotNull(databaseName, "name of the default database").toString();
return this;
}
@Override
public GeneralPropertiesStep connectionPoolMinSize(final int minSize) {
mongoClientSettingsBuilder.applyToConnectionPoolSettings(builder -> builder.minSize(minSize));
return this;
}
@Override
public MongoClientWrapperBuilder connectionPoolMaxSize(final int maxSize) {
mongoClientSettingsBuilder.applyToConnectionPoolSettings(builder -> builder.maxSize(maxSize));
return this;
}
@Override
public MongoClientWrapperBuilder connectionPoolMaxIdleTime(final Duration maxConnectionIdleTime) {
mongoClientSettingsBuilder.applyToConnectionPoolSettings(builder -> builder.maxConnectionIdleTime(maxConnectionIdleTime.toMillis(), TimeUnit.MILLISECONDS));
return this;
}
@Override
public MongoClientWrapperBuilder connectionPoolMaxWaitTime(final Duration maxPoolWaitTime) {
checkNotNull(maxPoolWaitTime, "maxPoolWaitTime");
mongoClientSettingsBuilder.applyToConnectionPoolSettings(
builder -> builder.maxWaitTime(maxPoolWaitTime.toMillis(), TimeUnit.MILLISECONDS));
return this;
}
@Override
public MongoClientWrapperBuilder addCommandListener(@Nullable final CommandListener commandListener) {
if (null != commandListener) {
mongoClientSettingsBuilder.addCommandListener(commandListener);
}
return this;
}
@Override
public MongoClientWrapperBuilder enableJmxListener(final boolean enabled) {
if (enabled) {
mongoClientSettingsBuilder.applyToConnectionPoolSettings(
builder -> builder.addConnectionPoolListener(new JMXConnectionPoolListener()));
}
return this;
}
@Override
public MongoClientWrapperBuilder addConnectionPoolListener(
@Nullable final ConnectionPoolListener connectionPoolListener) {
if (null != connectionPoolListener) {
mongoClientSettingsBuilder.applyToConnectionPoolSettings(
builder -> builder.addConnectionPoolListener(connectionPoolListener));
}
return this;
}
@Override
public GeneralPropertiesStep setReadPreference(final ReadPreference readPreference) {
mongoClientSettingsBuilder.readPreference(readPreference);
return this;
}
@Override
public GeneralPropertiesStep setReadConcern(final ReadConcern readConcern) {
mongoClientSettingsBuilder.readConcern(readConcern);
return this;
}
@Override
public GeneralPropertiesStep setWriteConcern(final WriteConcern writeConcern) {
mongoClientSettingsBuilder.writeConcern(writeConcern);
return this;
}
@Override
public GeneralPropertiesStep setRetryWrites(final boolean retryWrites) {
mongoClientSettingsBuilder.retryWrites(retryWrites);
return this;
}
@Override
public MongoClientWrapper build() {
buildAndApplySslSettings();
return new MongoClientWrapper(mongoClientSettingsBuilder.build(), defaultDatabaseName,
dittoMongoClientSettingsBuilder.build(), eventLoopGroup);
}
private void buildAndApplySslSettings() {
if (sslEnabled) {
eventLoopGroup = new NioEventLoopGroup();
mongoClientSettingsBuilder
.streamFactoryFactory(NettyStreamFactoryFactory.builder().eventLoopGroup(eventLoopGroup).build())
.applyToSslSettings(builder -> builder
.context(tryToCreateAndInitSslContext())
.enabled(sslEnabled));
} else if (null != connectionString) {
eventLoopGroup = null;
mongoClientSettingsBuilder
.applyToSslSettings(builder -> builder
.enabled(sslEnabled));
}
}
private static SSLContext tryToCreateAndInitSslContext() {
try {
return createAndInitSslContext();
} catch (final NoSuchAlgorithmException e) {
throw new IllegalArgumentException("No such Algorithm is supported!", e);
} catch (final KeyManagementException e) {
throw new IllegalStateException("KeyManagementException!", e);
}
}
private static SSLContext createAndInitSslContext() throws NoSuchAlgorithmException, KeyManagementException {
final SSLContext result = SSLContext.getInstance("TLSv1.2");
result.init(null, null, null);
return result;
}
}
}