/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate licenses
* this file to you 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.action.sql;
import com.google.common.base.Objects;
import io.crate.analyze.Analysis;
import io.crate.analyze.Analyzer;
import io.crate.executor.BytesRefUtils;
import io.crate.executor.Executor;
import io.crate.executor.QueryResult;
import io.crate.executor.TaskResult;
import io.crate.executor.transport.ResponseForwarder;
import io.crate.operation.collect.StatsTables;
import io.crate.planner.Plan;
import io.crate.planner.Planner;
import io.crate.sql.tree.Statement;
import io.crate.types.DataType;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.Provider;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.BaseTransportRequestHandler;
import org.elasticsearch.transport.TransportChannel;
import org.elasticsearch.transport.TransportService;
import javax.annotation.Nullable;
import java.util.List;
public class TransportSQLAction extends TransportBaseSQLAction<SQLRequest, SQLResponse> {
@Inject
protected TransportSQLAction(
ClusterService clusterService,
Settings settings,
ThreadPool threadPool,
Analyzer analyzer,
Planner planner,
Provider<Executor> executor,
Provider<DDLAnalysisDispatcher> dispatcher,
TransportService transportService,
StatsTables statsTables) {
super(clusterService, settings, SQLAction.NAME, threadPool, analyzer, planner, executor, dispatcher, statsTables);
transportService.registerHandler(SQLAction.NAME, new TransportHandler());
}
@Override
public Analysis getAnalysis(Statement statement, SQLRequest request) {
return analyzer.analyze(statement, request.args(), SQLBulkRequest.EMPTY_BULK_ARGS);
}
@Override
public SQLResponse emptyResponse(SQLRequest request,
String[] outputNames,
@Nullable DataType[] types) {
return new SQLResponse(outputNames,
TaskResult.EMPTY_RESULT.rows(),
types,
0L,
request.creationTime(),
request.includeTypesOnResponse());
}
@Override
protected SQLResponse emptyResponse(SQLRequest request, Plan plan, String[] outputNames) {
return new SQLResponse(
outputNames,
TaskResult.EMPTY_RESULT.rows(),
plan.outputTypes().toArray(new DataType[plan.outputTypes().size()]),
0L,
request.creationTime,
request.includeTypesOnResponse());
}
@Override
protected SQLResponse createResponseFromResult(SQLRequest request,
String[] outputNames,
Long rowCount,
@Nullable DataType[] types) {
return new SQLResponse(
outputNames,
TaskResult.EMPTY_RESULT.rows(),
types,
Objects.firstNonNull(rowCount, SQLResponse.NO_ROW_COUNT),
request.creationTime(),
request.includeTypesOnResponse()
);
}
@Override
protected SQLResponse createResponseFromResult(Plan plan,
String[] outputNames,
List<TaskResult> result,
long requestCreationTime,
boolean includeTypesOnResponse) {
assert result.size() == 1;
TaskResult taskResult = result.get(0);
Object[][] rows = taskResult.rows();
long rowCount = 0;
if (plan.expectsAffectedRows() && taskResult instanceof QueryResult) {
if (rows.length >= 1 && rows[0].length >= 1) {
rowCount = ((Number) rows[0][0]).longValue();
}
} else {
rowCount = taskResult.rowCount();
}
DataType[] dataTypes = plan.outputTypes().toArray(new DataType[plan.outputTypes().size()]);
BytesRefUtils.ensureStringTypesAreStrings(dataTypes, rows);
return new SQLResponse(
outputNames,
rows,
dataTypes,
rowCount,
requestCreationTime,
includeTypesOnResponse
);
}
private class TransportHandler extends BaseTransportRequestHandler<SQLRequest> {
@Override
public SQLRequest newInstance() {
return new SQLRequest();
}
@Override
public void messageReceived(SQLRequest request, final TransportChannel channel) throws Exception {
// no need for a threaded listener
request.listenerThreaded(false);
ActionListener<SQLResponse> listener = ResponseForwarder.forwardTo(channel);
execute(request, listener);
}
@Override
public String executor() {
return ThreadPool.Names.SAME;
}
}
}