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/*
* 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.operation;
import com.mongodb.WriteConcern;
import com.mongodb.async.SingleResultCallback;
import com.mongodb.binding.AsyncWriteBinding;
import com.mongodb.binding.WriteBinding;
import com.mongodb.connection.AsyncConnection;
import com.mongodb.connection.Connection;
import com.mongodb.connection.ConnectionDescription;
import org.bson.BsonDocument;
import org.bson.BsonInt32;
import static com.mongodb.assertions.Assertions.notNull;
import static com.mongodb.internal.async.ErrorHandlingResultCallback.errorHandlingCallback;
import static com.mongodb.operation.CommandOperationHelper.executeCommand;
import static com.mongodb.operation.CommandOperationHelper.executeCommandAsync;
import static com.mongodb.operation.CommandOperationHelper.writeConcernErrorWriteTransformer;
import static com.mongodb.operation.OperationHelper.LOGGER;
import static com.mongodb.operation.OperationHelper.releasingCallback;
import static com.mongodb.operation.OperationHelper.withConnection;
import static com.mongodb.internal.operation.WriteConcernHelper.appendWriteConcernToCommand;
import static com.mongodb.operation.CommandOperationHelper.writeConcernErrorTransformer;
import static com.mongodb.operation.OperationHelper.AsyncCallableWithConnection;
import static com.mongodb.operation.OperationHelper.CallableWithConnection;
import static com.mongodb.operation.OperationHelper.withAsyncConnection;
/**
* Operation to drop a database in MongoDB. The {@code execute} method throws MongoCommandFailureException if something goes wrong, but
* it will not throw an Exception if the collection does not exist before trying to drop it.
*
* @since 3.0
*/
@Deprecated
public class DropDatabaseOperation implements AsyncWriteOperation, WriteOperation {
private final String databaseName;
private final WriteConcern writeConcern;
/**
* Construct a new instance.
*
* @param databaseName the name of the database for the operation.
*/
@Deprecated
public DropDatabaseOperation(final String databaseName) {
this(databaseName, null);
}
/**
* Construct a new instance.
*
* @param databaseName the name of the database for the operation.
* @param writeConcern the write concern
*
* @since 3.4
*/
public DropDatabaseOperation(final String databaseName, final WriteConcern writeConcern) {
this.databaseName = notNull("databaseName", databaseName);
this.writeConcern = writeConcern;
}
/**
* Gets the write concern.
*
* @return the write concern, which may be null
*
* @since 3.4
*/
public WriteConcern getWriteConcern() {
return writeConcern;
}
@Override
public Void execute(final WriteBinding binding) {
return withConnection(binding, new CallableWithConnection() {
@Override
public Void call(final Connection connection) {
executeCommand(binding, databaseName, getCommand(connection.getDescription()), connection, writeConcernErrorTransformer());
return null;
}
});
}
@Override
public void executeAsync(final AsyncWriteBinding binding, final SingleResultCallback callback) {
withAsyncConnection(binding, new AsyncCallableWithConnection() {
@Override
public void call(final AsyncConnection connection, final Throwable t) {
SingleResultCallback errHandlingCallback = errorHandlingCallback(callback, LOGGER);
if (t != null) {
errHandlingCallback.onResult(null, t);
} else {
executeCommandAsync(binding, databaseName, getCommand(connection.getDescription()), connection,
writeConcernErrorWriteTransformer(), releasingCallback(errHandlingCallback, connection));
}
}
});
}
private BsonDocument getCommand(final ConnectionDescription description) {
BsonDocument commandDocument = new BsonDocument("dropDatabase", new BsonInt32(1));
appendWriteConcernToCommand(writeConcern, commandDocument, description);
return commandDocument;
}
}