QuerySystemTable.java
/*
* 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.connector.system;
import com.facebook.presto.common.block.Block;
import com.facebook.presto.common.block.BlockBuilder;
import com.facebook.presto.common.predicate.TupleDomain;
import com.facebook.presto.common.type.ArrayType;
import com.facebook.presto.execution.QueryInfo;
import com.facebook.presto.execution.QueryManager;
import com.facebook.presto.execution.QueryStats;
import com.facebook.presto.server.BasicQueryInfo;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.ConnectorTableMetadata;
import com.facebook.presto.spi.InMemoryRecordSet;
import com.facebook.presto.spi.InMemoryRecordSet.Builder;
import com.facebook.presto.spi.RecordCursor;
import com.facebook.presto.spi.SchemaTableName;
import com.facebook.presto.spi.SystemTable;
import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
import com.facebook.presto.spi.resourceGroups.ResourceGroupId;
import io.airlift.units.Duration;
import javax.inject.Inject;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Objects;
import static com.facebook.presto.common.type.BigintType.BIGINT;
import static com.facebook.presto.common.type.TimestampType.TIMESTAMP;
import static com.facebook.presto.common.type.VarcharType.createUnboundedVarcharType;
import static com.facebook.presto.metadata.MetadataUtil.TableMetadataBuilder.tableMetadataBuilder;
import static com.facebook.presto.spi.SystemTable.Distribution.ALL_COORDINATORS;
import static com.facebook.presto.util.DateTimeUtils.toTimeStampInMillis;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static io.airlift.slice.Slices.utf8Slice;
import static java.util.Objects.requireNonNull;
public class QuerySystemTable
implements SystemTable
{
public static final SchemaTableName QUERY_TABLE_NAME = new SchemaTableName("runtime", "queries");
public static final ConnectorTableMetadata QUERY_TABLE = tableMetadataBuilder(QUERY_TABLE_NAME)
.column("query_id", createUnboundedVarcharType())
.column("state", createUnboundedVarcharType())
.column("user", createUnboundedVarcharType())
.column("source", createUnboundedVarcharType())
.column("query", createUnboundedVarcharType())
.column("resource_group_id", new ArrayType(createUnboundedVarcharType()))
.column("queued_time_ms", BIGINT)
.column("analysis_time_ms", BIGINT)
.column("created", TIMESTAMP)
.column("started", TIMESTAMP)
.column("last_heartbeat", TIMESTAMP)
.column("end", TIMESTAMP)
.build();
private final QueryManager queryManager;
@Inject
public QuerySystemTable(QueryManager queryManager)
{
this.queryManager = queryManager;
}
@Override
public Distribution getDistribution()
{
return ALL_COORDINATORS;
}
@Override
public ConnectorTableMetadata getTableMetadata()
{
return QUERY_TABLE;
}
@Override
public RecordCursor cursor(ConnectorTransactionHandle transactionHandle, ConnectorSession session, TupleDomain<Integer> constraint)
{
Builder table = InMemoryRecordSet.builder(QUERY_TABLE);
List<QueryInfo> queryInfos = queryManager.getQueries().stream()
.map(BasicQueryInfo::getQueryId)
.map(queryId -> {
try {
return queryManager.getFullQueryInfo(queryId);
}
catch (NoSuchElementException e) {
return null;
}
})
.filter(Objects::nonNull)
.collect(toImmutableList());
for (QueryInfo queryInfo : queryInfos) {
QueryStats queryStats = queryInfo.getQueryStats();
table.addRow(
queryInfo.getQueryId().toString(),
queryInfo.getState().toString(),
queryInfo.getSession().getUser(),
queryInfo.getSession().getSource().orElse(null),
queryInfo.getQuery(),
queryInfo.getResourceGroupId().map(QuerySystemTable::resourceGroupIdToBlock).orElse(null),
toMillis(queryStats.getQueuedTime()),
toMillis(queryStats.getAnalysisTime()),
toTimeStampInMillis(queryStats.getCreateTime()),
toTimeStampInMillis(queryStats.getExecutionStartTime()),
toTimeStampInMillis(queryStats.getLastHeartbeat()),
toTimeStampInMillis(queryStats.getEndTime()));
}
return table.build().cursor();
}
private static Block resourceGroupIdToBlock(ResourceGroupId resourceGroupId)
{
requireNonNull(resourceGroupId, "resourceGroupId is null");
List<String> segments = resourceGroupId.getSegments();
BlockBuilder blockBuilder = createUnboundedVarcharType().createBlockBuilder(null, segments.size());
for (String segment : segments) {
createUnboundedVarcharType().writeSlice(blockBuilder, utf8Slice(segment));
}
return blockBuilder.build();
}
private static Long toMillis(Duration duration)
{
if (duration == null) {
return null;
}
return duration.toMillis();
}
}