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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
/*
* 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.ReadPreference;
import com.mongodb.connection.ClusterConnectionMode;
import com.mongodb.connection.ConnectionDescription;
import com.mongodb.internal.async.SingleResultCallback;
import com.mongodb.internal.binding.BindingContext;
import com.mongodb.internal.diagnostics.logging.Logger;
import com.mongodb.internal.diagnostics.logging.Loggers;
import com.mongodb.internal.session.SessionContext;
import com.mongodb.lang.Nullable;
import org.bson.BsonDocument;
import org.bson.FieldNameValidator;
import org.bson.codecs.Decoder;
import static com.mongodb.internal.async.ErrorHandlingResultCallback.errorHandlingCallback;
/**
* This class is not part of the public API and may be removed or changed at any time
*/
public class DefaultServerConnection extends AbstractReferenceCounted implements Connection, AsyncConnection {
private static final Logger LOGGER = Loggers.getLogger("connection");
private final InternalConnection wrapped;
private final ProtocolExecutor protocolExecutor;
private final ClusterConnectionMode clusterConnectionMode;
public DefaultServerConnection(final InternalConnection wrapped, final ProtocolExecutor protocolExecutor,
final ClusterConnectionMode clusterConnectionMode) {
this.wrapped = wrapped;
this.protocolExecutor = protocolExecutor;
this.clusterConnectionMode = clusterConnectionMode;
}
@Override
public DefaultServerConnection retain() {
super.retain();
return this;
}
@Override
public int release() {
int count = super.release();
if (count == 0) {
wrapped.close();
}
return count;
}
@Override
public ConnectionDescription getDescription() {
return wrapped.getDescription();
}
@Nullable
@Override
public T command(final String database, final BsonDocument command, final FieldNameValidator fieldNameValidator,
@Nullable final ReadPreference readPreference, final Decoder commandResultDecoder, final BindingContext context) {
return command(database, command, fieldNameValidator, readPreference, commandResultDecoder, context, true, null, null);
}
@Nullable
@Override
public T command(final String database, final BsonDocument command, final FieldNameValidator commandFieldNameValidator,
@Nullable final ReadPreference readPreference, final Decoder commandResultDecoder,
final BindingContext context, final boolean responseExpected,
@Nullable final SplittablePayload payload, @Nullable final FieldNameValidator payloadFieldNameValidator) {
return executeProtocol(new CommandProtocolImpl<>(database, command, commandFieldNameValidator, readPreference,
commandResultDecoder, responseExpected, payload, payloadFieldNameValidator, clusterConnectionMode,
context.getServerApi(), context.getRequestContext(), context.getOperationContext()),
context.getSessionContext());
}
@Override
public void commandAsync(final String database, final BsonDocument command, final FieldNameValidator fieldNameValidator,
@Nullable final ReadPreference readPreference, final Decoder commandResultDecoder, final BindingContext context,
final SingleResultCallback callback) {
commandAsync(database, command, fieldNameValidator, readPreference, commandResultDecoder,
context, true, null, null, callback);
}
@Override
public void commandAsync(final String database, final BsonDocument command, final FieldNameValidator commandFieldNameValidator,
@Nullable final ReadPreference readPreference, final Decoder commandResultDecoder, final BindingContext context,
final boolean responseExpected, @Nullable final SplittablePayload payload,
@Nullable final FieldNameValidator payloadFieldNameValidator, final SingleResultCallback callback) {
executeProtocolAsync(new CommandProtocolImpl<>(database, command, commandFieldNameValidator, readPreference,
commandResultDecoder, responseExpected, payload, payloadFieldNameValidator, clusterConnectionMode,
context.getServerApi(), context.getRequestContext(), context.getOperationContext()),
context.getSessionContext(), callback);
}
@Override
public void markAsPinned(final PinningMode pinningMode) {
wrapped.markAsPinned(pinningMode);
}
@Nullable
private T executeProtocol(final CommandProtocol protocol, final SessionContext sessionContext) {
return protocolExecutor.execute(protocol, this.wrapped, sessionContext);
}
private void executeProtocolAsync(final CommandProtocol protocol, final SessionContext sessionContext,
final SingleResultCallback callback) {
SingleResultCallback errHandlingCallback = errorHandlingCallback(callback, LOGGER);
try {
protocolExecutor.executeAsync(protocol, this.wrapped, sessionContext, errHandlingCallback);
} catch (Throwable t) {
errHandlingCallback.onResult(null, t);
}
}
}
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