/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.
*/
package org.apache.drill.exec.rpc.user;
import org.apache.drill.exec.proto.GeneralRPCProtos.Ack;
import org.apache.drill.exec.proto.UserBitShared.QueryId;
import org.apache.drill.exec.proto.UserProtos.CreatePreparedStatementReq;
import org.apache.drill.exec.proto.UserProtos.GetCatalogsReq;
import org.apache.drill.exec.proto.UserProtos.GetColumnsReq;
import org.apache.drill.exec.proto.UserProtos.GetQueryPlanFragments;
import org.apache.drill.exec.proto.UserProtos.GetSchemasReq;
import org.apache.drill.exec.proto.UserProtos.GetServerMetaReq;
import org.apache.drill.exec.proto.UserProtos.GetTablesReq;
import org.apache.drill.exec.proto.UserProtos.RpcType;
import org.apache.drill.exec.proto.UserProtos.RunQuery;
import org.apache.drill.exec.rpc.RequestHandler;
import org.apache.drill.exec.rpc.Response;
import org.apache.drill.exec.rpc.ResponseSender;
import org.apache.drill.exec.rpc.RpcException;
import org.apache.drill.exec.rpc.user.UserServer.BitToUserConnection;
import org.apache.drill.exec.work.user.UserWorker;
import com.google.protobuf.InvalidProtocolBufferException;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufInputStream;
/**
* Should create only one instance of this class per Drillbit service.
*/
// package private
class UserServerRequestHandler implements RequestHandler<BitToUserConnection> {
private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(UserServerRequestHandler.class);
private final UserWorker worker;
public UserServerRequestHandler(final UserWorker worker) {
this.worker = worker;
}
@Override
public void handle(BitToUserConnection connection, int rpcType, ByteBuf pBody, ByteBuf dBody,
ResponseSender responseSender)
throws RpcException {
switch (rpcType) {
case RpcType.RUN_QUERY_VALUE:
logger.debug("Received query to run. Returning query handle.");
try {
final RunQuery query = RunQuery.PARSER.parseFrom(new ByteBufInputStream(pBody));
final QueryId queryId = worker.submitWork(connection, query);
responseSender.send(new Response(RpcType.QUERY_HANDLE, queryId));
break;
} catch (InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding RunQuery body.", e);
}
case RpcType.CANCEL_QUERY_VALUE:
try {
final QueryId queryId = QueryId.PARSER.parseFrom(new ByteBufInputStream(pBody));
final Ack ack = worker.cancelQuery(queryId);
responseSender.send(new Response(RpcType.ACK, ack));
break;
} catch (InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding QueryId body.", e);
}
case RpcType.RESUME_PAUSED_QUERY_VALUE:
try {
final QueryId queryId = QueryId.PARSER.parseFrom(new ByteBufInputStream(pBody));
final Ack ack = worker.resumeQuery(queryId);
responseSender.send(new Response(RpcType.ACK, ack));
break;
} catch (final InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding QueryId body.", e);
}
case RpcType.GET_QUERY_PLAN_FRAGMENTS_VALUE:
try {
final GetQueryPlanFragments req = GetQueryPlanFragments.PARSER.parseFrom(new ByteBufInputStream(pBody));
responseSender.send(new Response(RpcType.QUERY_PLAN_FRAGMENTS, worker.getQueryPlan(connection, req)));
break;
} catch(final InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding GetQueryPlanFragments body.", e);
}
case RpcType.GET_CATALOGS_VALUE:
try {
final GetCatalogsReq req = GetCatalogsReq.PARSER.parseFrom(new ByteBufInputStream(pBody));
worker.submitCatalogMetadataWork(connection.getSession(), req, responseSender);
break;
} catch (final InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding GetCatalogsReq body.", e);
}
case RpcType.GET_SCHEMAS_VALUE:
try {
final GetSchemasReq req = GetSchemasReq.PARSER.parseFrom(new ByteBufInputStream(pBody));
worker.submitSchemasMetadataWork(connection.getSession(), req, responseSender);
break;
} catch (final InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding GetSchemasReq body.", e);
}
case RpcType.GET_TABLES_VALUE:
try {
final GetTablesReq req = GetTablesReq.PARSER.parseFrom(new ByteBufInputStream(pBody));
worker.submitTablesMetadataWork(connection.getSession(), req, responseSender);
break;
} catch (final InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding GetTablesReq body.", e);
}
case RpcType.GET_COLUMNS_VALUE:
try {
final GetColumnsReq req = GetColumnsReq.PARSER.parseFrom(new ByteBufInputStream(pBody));
worker.submitColumnsMetadataWork(connection.getSession(), req, responseSender);
break;
} catch (final InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding GetColumnsReq body.", e);
}
case RpcType.CREATE_PREPARED_STATEMENT_VALUE:
try {
final CreatePreparedStatementReq req =
CreatePreparedStatementReq.PARSER.parseFrom(new ByteBufInputStream(pBody));
worker.submitPreparedStatementWork(connection, req, responseSender);
break;
} catch (final InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding CreatePreparedStatementReq body.", e);
}
case RpcType.GET_SERVER_META_VALUE:
try {
final GetServerMetaReq req =
GetServerMetaReq.PARSER.parseFrom(new ByteBufInputStream(pBody));
worker.submitServerMetadataWork(connection.getSession(), req, responseSender);
break;
} catch (final InvalidProtocolBufferException e) {
throw new RpcException("Failure while decoding CreatePreparedStatementReq body.", e);
}
default:
throw new UnsupportedOperationException(
String.format("UserServerRequestHandler received rpc of unknown type. Type was %d.", rpcType));
}
}
}