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The MongoDB Java Driver uber-artifact, containing mongodb-driver, mongodb-driver-core, and bson
/*
* Copyright (c) 2008-2014 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.operation;
import com.mongodb.MongoClientException;
import com.mongodb.MongoNamespace;
import com.mongodb.ReadConcern;
import com.mongodb.ServerAddress;
import com.mongodb.WriteConcern;
import com.mongodb.async.AsyncBatchCursor;
import com.mongodb.async.SingleResultCallback;
import com.mongodb.binding.AsyncConnectionSource;
import com.mongodb.binding.AsyncReadBinding;
import com.mongodb.binding.AsyncWriteBinding;
import com.mongodb.binding.ConnectionSource;
import com.mongodb.binding.ReadBinding;
import com.mongodb.binding.ReferenceCounted;
import com.mongodb.binding.WriteBinding;
import com.mongodb.connection.AsyncConnection;
import com.mongodb.connection.Connection;
import com.mongodb.connection.ConnectionDescription;
import com.mongodb.connection.QueryResult;
import com.mongodb.connection.ServerVersion;
import org.bson.BsonDocument;
import org.bson.BsonInt64;
import org.bson.codecs.Decoder;
import java.util.Collections;
import java.util.List;
import static com.mongodb.assertions.Assertions.notNull;
import static com.mongodb.internal.async.ErrorHandlingResultCallback.errorHandlingCallback;
import static java.lang.String.format;
import static java.util.Arrays.asList;
import static java.util.Collections.singletonList;
final class OperationHelper {
interface CallableWithConnection {
T call(Connection connection);
}
interface CallableWithConnectionAndSource {
T call(ConnectionSource source, Connection connection);
}
interface AsyncCallableWithConnection {
void call(AsyncConnection connection, Throwable t);
}
interface AsyncCallableWithConnectionAndSource {
void call(AsyncConnectionSource source, AsyncConnection connection, Throwable t);
}
static void checkValidReadConcern(final Connection connection, final ReadConcern readConcern) {
if (!serverIsAtLeastVersionThreeDotTwo(connection.getDescription()) && !readConcern.isServerDefault()) {
throw new IllegalArgumentException(format("Unsupported ReadConcern : '%s'", readConcern.asDocument().toJson()));
}
}
static void checkValidReadConcern(final AsyncConnection connection, final ReadConcern readConcern,
final AsyncCallableWithConnection callable) {
Throwable throwable = null;
if (!serverIsAtLeastVersionThreeDotTwo(connection.getDescription()) && !readConcern.isServerDefault()) {
throwable = new IllegalArgumentException(format("Unsupported ReadConcern : '%s'", readConcern.asDocument().toJson()));
}
callable.call(connection, throwable);
}
static void checkValidReadConcern(final AsyncConnectionSource source, final AsyncConnection connection, final ReadConcern readConcern,
final AsyncCallableWithConnectionAndSource callable) {
Throwable throwable = null;
if (!serverIsAtLeastVersionThreeDotTwo(connection.getDescription()) && !readConcern.isServerDefault()) {
throwable = new IllegalArgumentException(format("Unsupported ReadConcern : '%s'", readConcern.asDocument().toJson()));
}
callable.call(source, connection, throwable);
}
static boolean bypassDocumentValidationNotSupported(final Boolean bypassDocumentValidation, final WriteConcern writeConcern,
final ConnectionDescription description) {
return bypassDocumentValidation != null && serverIsAtLeastVersionThreeDotTwo(description) && !writeConcern.isAcknowledged();
}
static MongoClientException getBypassDocumentValidationException() {
return new MongoClientException("Specifying bypassDocumentValidation with an unacknowledged WriteConcern "
+ "is not supported");
}
static QueryBatchCursor createEmptyBatchCursor(final MongoNamespace namespace, final Decoder decoder,
final ServerAddress serverAddress, final int batchSize) {
return new QueryBatchCursor(new QueryResult(namespace, Collections.emptyList(), 0L,
serverAddress),
0, batchSize, decoder);
}
static AsyncBatchCursor createEmptyAsyncBatchCursor(final MongoNamespace namespace, final Decoder decoder,
final ServerAddress serverAddress, final int batchSize) {
return new AsyncQueryBatchCursor(new QueryResult(namespace, Collections.emptyList(), 0L, serverAddress), 0, batchSize,
decoder);
}
static BatchCursor cursorDocumentToBatchCursor(final BsonDocument cursorDocument, final Decoder decoder,
final ConnectionSource source, final int batchSize) {
return new QueryBatchCursor(OperationHelper.cursorDocumentToQueryResult(cursorDocument,
source.getServerDescription().getAddress()),
0, batchSize, decoder, source);
}
static AsyncBatchCursor cursorDocumentToAsyncBatchCursor(final BsonDocument cursorDocument, final Decoder decoder,
final AsyncConnectionSource source, final AsyncConnection connection,
final int batchSize) {
return new AsyncQueryBatchCursor(OperationHelper.cursorDocumentToQueryResult(cursorDocument,
source.getServerDescription().getAddress()),
0, batchSize, 0, decoder, source, connection);
}
static QueryResult cursorDocumentToQueryResult(final BsonDocument cursorDocument, final ServerAddress serverAddress) {
return cursorDocumentToQueryResult(cursorDocument, serverAddress, "firstBatch");
}
static QueryResult getMoreCursorDocumentToQueryResult(final BsonDocument cursorDocument, final ServerAddress serverAddress) {
return cursorDocumentToQueryResult(cursorDocument, serverAddress, "nextBatch");
}
private static QueryResult cursorDocumentToQueryResult(final BsonDocument cursorDocument, final ServerAddress serverAddress,
final String fieldNameContainingBatch) {
long cursorId = ((BsonInt64) cursorDocument.get("id")).getValue();
MongoNamespace queryResultNamespace = new MongoNamespace(cursorDocument.getString("ns").getValue());
return new QueryResult(queryResultNamespace, BsonDocumentWrapperHelper.toList(cursorDocument, fieldNameContainingBatch),
cursorId, serverAddress);
}
static SingleResultCallback releasingCallback(final SingleResultCallback wrapped, final AsyncConnection connection) {
return new ReferenceCountedReleasingWrappedCallback(wrapped, singletonList(connection));
}
static SingleResultCallback releasingCallback(final SingleResultCallback wrapped, final AsyncConnectionSource source,
final AsyncConnection connection) {
return new ReferenceCountedReleasingWrappedCallback(wrapped, asList(connection, source));
}
static SingleResultCallback releasingCallback(final SingleResultCallback wrapped,
final AsyncReadBinding readBinding,
final AsyncConnectionSource source,
final AsyncConnection connection) {
return new ReferenceCountedReleasingWrappedCallback(wrapped, asList(readBinding, connection, source));
}
private static class ReferenceCountedReleasingWrappedCallback implements SingleResultCallback {
private final SingleResultCallback wrapped;
private final List referenceCounted;
ReferenceCountedReleasingWrappedCallback(final SingleResultCallback wrapped,
final List referenceCounted) {
this.wrapped = wrapped;
this.referenceCounted = notNull("referenceCounted", referenceCounted);
}
@Override
public void onResult(final T result, final Throwable t) {
for (ReferenceCounted cur : referenceCounted) {
cur.release();
}
wrapped.onResult(result, t);
}
}
static boolean serverIsAtLeastVersionTwoDotSix(final ConnectionDescription description) {
return serverIsAtLeastVersion(description, new ServerVersion(2, 6));
}
static boolean serverIsAtLeastVersionThreeDotZero(final ConnectionDescription description) {
return serverIsAtLeastVersion(description, new ServerVersion(asList(3, 0, 0)));
}
static boolean serverIsAtLeastVersionThreeDotTwo(final ConnectionDescription description) {
return serverIsAtLeastVersion(description, new ServerVersion(asList(3, 1, 9)));
}
static boolean serverIsAtLeastVersion(final ConnectionDescription description, final ServerVersion serverVersion) {
return description.getServerVersion().compareTo(serverVersion) >= 0;
}
static T withConnection(final ReadBinding binding, final CallableWithConnection callable) {
ConnectionSource source = binding.getReadConnectionSource();
try {
return withConnectionSource(source, callable);
} finally {
source.release();
}
}
static T withConnection(final ReadBinding binding, final CallableWithConnectionAndSource callable) {
ConnectionSource source = binding.getReadConnectionSource();
try {
return withConnectionSource(source, callable);
} finally {
source.release();
}
}
static T withConnection(final WriteBinding binding, final CallableWithConnection callable) {
ConnectionSource source = binding.getWriteConnectionSource();
try {
return withConnectionSource(source, callable);
} finally {
source.release();
}
}
static T withConnectionSource(final ConnectionSource source, final CallableWithConnection callable) {
Connection connection = source.getConnection();
try {
return callable.call(connection);
} finally {
connection.release();
}
}
static T withConnectionSource(final ConnectionSource source, final CallableWithConnectionAndSource callable) {
Connection connection = source.getConnection();
try {
return callable.call(source, connection);
} finally {
connection.release();
}
}
static void withConnection(final AsyncWriteBinding binding, final AsyncCallableWithConnection callable) {
binding.getWriteConnectionSource(errorHandlingCallback(new AsyncCallableWithConnectionCallback(callable)));
}
static void withConnection(final AsyncReadBinding binding, final AsyncCallableWithConnection callable) {
binding.getReadConnectionSource(errorHandlingCallback(new AsyncCallableWithConnectionCallback(callable)));
}
static void withConnection(final AsyncReadBinding binding, final AsyncCallableWithConnectionAndSource callable) {
binding.getReadConnectionSource(errorHandlingCallback(new AsyncCallableWithConnectionAndSourceCallback(callable)));
}
private static class AsyncCallableWithConnectionCallback implements SingleResultCallback {
private final AsyncCallableWithConnection callable;
public AsyncCallableWithConnectionCallback(final AsyncCallableWithConnection callable) {
this.callable = callable;
}
@Override
public void onResult(final AsyncConnectionSource source, final Throwable t) {
if (t != null) {
callable.call(null, t);
} else {
withConnectionSource(source, callable);
}
}
}
private static void withConnectionSource(final AsyncConnectionSource source, final AsyncCallableWithConnection callable) {
source.getConnection(new SingleResultCallback() {
@Override
public void onResult(final AsyncConnection connection, final Throwable t) {
source.release();
if (t != null) {
callable.call(null, t);
} else {
callable.call(connection, null);
}
}
});
}
private static void withConnectionSource(final AsyncConnectionSource source, final AsyncCallableWithConnectionAndSource callable) {
source.getConnection(new SingleResultCallback() {
@Override
public void onResult(final AsyncConnection result, final Throwable t) {
callable.call(source, result, t);
}
});
}
private static class AsyncCallableWithConnectionAndSourceCallback implements SingleResultCallback {
private final AsyncCallableWithConnectionAndSource callable;
public AsyncCallableWithConnectionAndSourceCallback(final AsyncCallableWithConnectionAndSource callable) {
this.callable = callable;
}
@Override
public void onResult(final AsyncConnectionSource source, final Throwable t) {
if (t != null) {
callable.call(null, null, t);
} else {
withConnectionSource(source, callable);
}
}
}
private OperationHelper() {
}
}
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