/*
* 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.facebook.presto.server;
import com.facebook.presto.Session;
import com.facebook.presto.execution.QueryId;
import com.facebook.presto.execution.QueryInfo;
import com.facebook.presto.execution.QueryManager;
import com.facebook.presto.execution.StageId;
import com.google.common.collect.ImmutableList;
import javax.inject.Inject;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.UriInfo;
import java.net.URI;
import java.util.List;
import java.util.NoSuchElementException;
import static com.facebook.presto.server.ResourceUtil.assertRequest;
import static com.facebook.presto.server.ResourceUtil.createSessionForRequest;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Strings.isNullOrEmpty;
import static io.airlift.http.client.HttpUriBuilder.uriBuilderFrom;
/**
* Manage queries scheduled on this node
*/
@Path("/v1/query")
public class QueryResource
{
private final QueryManager queryManager;
@Inject
public QueryResource(QueryManager queryManager)
{
this.queryManager = checkNotNull(queryManager, "queryManager is null");
}
@GET
public List<BasicQueryInfo> getAllQueryInfo()
{
return extractBasicQueryInfo(queryManager.getAllQueryInfo());
}
private static List<BasicQueryInfo> extractBasicQueryInfo(List<QueryInfo> allQueryInfo)
{
ImmutableList.Builder<BasicQueryInfo> basicQueryInfo = ImmutableList.builder();
for (QueryInfo queryInfo : allQueryInfo) {
basicQueryInfo.add(new BasicQueryInfo(queryInfo));
}
return basicQueryInfo.build();
}
@GET
@Path("{queryId}")
public Response getQueryInfo(@PathParam("queryId") QueryId queryId)
{
checkNotNull(queryId, "queryId is null");
try {
QueryInfo queryInfo = queryManager.getQueryInfo(queryId);
return Response.ok(queryInfo).build();
}
catch (NoSuchElementException e) {
return Response.status(Status.GONE).build();
}
}
@POST
@Produces(MediaType.APPLICATION_JSON)
public Response createQuery(
String statement,
@Context HttpServletRequest servletRequest,
@Context UriInfo uriInfo)
{
assertRequest(!isNullOrEmpty(statement), "SQL statement is empty");
Session session = createSessionForRequest(servletRequest);
QueryInfo queryInfo = queryManager.createQuery(session, statement);
URI pagesUri = uriBuilderFrom(uriInfo.getRequestUri()).appendPath(queryInfo.getQueryId().toString()).build();
return Response.created(pagesUri).entity(queryInfo).build();
}
@DELETE
@Path("{queryId}")
public void cancelQuery(@PathParam("queryId") QueryId queryId)
{
checkNotNull(queryId, "queryId is null");
queryManager.cancelQuery(queryId);
}
@DELETE
@Path("stage/{stageId}")
public void cancelStage(@PathParam("stageId") StageId stageId)
{
checkNotNull(stageId, "stageId is null");
queryManager.cancelStage(stageId);
}
}