/*
* 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.atop;
import com.facebook.presto.atop.AtopTable.AtopColumn;
import com.facebook.presto.spi.ColumnHandle;
import com.facebook.presto.spi.ColumnMetadata;
import com.facebook.presto.spi.ColumnNotFoundException;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.ConnectorTableHandle;
import com.facebook.presto.spi.ConnectorTableLayout;
import com.facebook.presto.spi.ConnectorTableLayoutHandle;
import com.facebook.presto.spi.ConnectorTableLayoutResult;
import com.facebook.presto.spi.ConnectorTableMetadata;
import com.facebook.presto.spi.Constraint;
import com.facebook.presto.spi.SchemaTableName;
import com.facebook.presto.spi.SchemaTablePrefix;
import com.facebook.presto.spi.connector.ConnectorMetadata;
import com.facebook.presto.spi.predicate.Domain;
import com.facebook.presto.spi.type.TypeManager;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import javax.inject.Inject;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static com.facebook.presto.atop.AtopTable.AtopColumn.END_TIME;
import static com.facebook.presto.atop.AtopTable.AtopColumn.START_TIME;
import static com.facebook.presto.spi.type.TimestampWithTimeZoneType.TIMESTAMP_WITH_TIME_ZONE;
import static java.util.Objects.requireNonNull;
public class AtopMetadata
implements ConnectorMetadata
{
private static final AtopColumnHandle START_TIME_HANDLE = new AtopColumnHandle(START_TIME.getName());
private static final AtopColumnHandle END_TIME_HANDLE = new AtopColumnHandle(END_TIME.getName());
private final TypeManager typeManager;
private final String environment;
@Inject
public AtopMetadata(TypeManager typeManager, Environment environment)
{
this.typeManager = requireNonNull(typeManager, "typeManager is null");
this.environment = requireNonNull(environment, "environment is null").toString();
}
@Override
public List<String> listSchemaNames(ConnectorSession session)
{
return ImmutableList.of("default", environment);
}
@Override
public ConnectorTableHandle getTableHandle(ConnectorSession session, SchemaTableName tableName)
{
requireNonNull(tableName, "tableName is null");
String schemaName = tableName.getSchemaName();
if (!listSchemaNames(session).contains(schemaName)) {
return null;
}
try {
AtopTable table = AtopTable.valueOf(tableName.getTableName().toUpperCase());
return new AtopTableHandle(schemaName, table);
}
catch (IllegalArgumentException e) {
return null;
}
}
@Override
public List<ConnectorTableLayoutResult> getTableLayouts(ConnectorSession session,
ConnectorTableHandle table,
Constraint<ColumnHandle> constraint,
Optional<Set<ColumnHandle>> desiredColumns)
{
AtopTableHandle tableHandle = (AtopTableHandle) table;
Optional<Map<ColumnHandle, Domain>> domains = constraint.getSummary().getDomains();
Domain endTimeDomain = Domain.all(TIMESTAMP_WITH_TIME_ZONE);
Domain startTimeDomain = Domain.all(TIMESTAMP_WITH_TIME_ZONE);
if (domains.isPresent()) {
if (domains.get().containsKey(START_TIME_HANDLE)) {
startTimeDomain = domains.get().get(START_TIME_HANDLE);
}
if (domains.get().containsKey(END_TIME_HANDLE)) {
endTimeDomain = domains.get().get(END_TIME_HANDLE);
}
}
AtopTableLayoutHandle layoutHandle = new AtopTableLayoutHandle(tableHandle, startTimeDomain, endTimeDomain);
ConnectorTableLayout tableLayout = getTableLayout(session, layoutHandle);
return ImmutableList.of(new ConnectorTableLayoutResult(tableLayout, constraint.getSummary()));
}
@Override
public ConnectorTableLayout getTableLayout(ConnectorSession session, ConnectorTableLayoutHandle tableLayoutHandle)
{
return new ConnectorTableLayout(tableLayoutHandle);
}
@Override
public ConnectorTableMetadata getTableMetadata(ConnectorSession session, ConnectorTableHandle tableHandle)
{
AtopTableHandle atopTableHandle = (AtopTableHandle) tableHandle;
ImmutableList.Builder<ColumnMetadata> columns = ImmutableList.builder();
for (AtopColumn column : atopTableHandle.getTable().getColumns()) {
columns.add(new ColumnMetadata(column.getName(), typeManager.getType(column.getType())));
}
SchemaTableName schemaTableName = new SchemaTableName(atopTableHandle.getSchema(), atopTableHandle.getTable().getName());
return new ConnectorTableMetadata(schemaTableName, columns.build());
}
@Override
public List<SchemaTableName> listTables(ConnectorSession session, String schemaNameOrNull)
{
if (schemaNameOrNull == null) {
return Stream.of(AtopTable.values())
.map(table -> new SchemaTableName(environment, table.getName()))
.collect(Collectors.toList());
}
if (!listSchemaNames(session).contains(schemaNameOrNull)) {
return ImmutableList.of();
}
return Stream.of(AtopTable.values())
.map(table -> new SchemaTableName(schemaNameOrNull, table.getName()))
.collect(Collectors.toList());
}
@Override
public Map<String, ColumnHandle> getColumnHandles(ConnectorSession session, ConnectorTableHandle tableHandle)
{
AtopTableHandle atopTableHandle = (AtopTableHandle) tableHandle;
ImmutableMap.Builder<String, ColumnHandle> columnHandles = ImmutableMap.builder();
for (AtopColumn column : atopTableHandle.getTable().getColumns()) {
columnHandles.put(column.getName(), new AtopColumnHandle(column.getName()));
}
return columnHandles.build();
}
@Override
public Map<SchemaTableName, List<ColumnMetadata>> listTableColumns(ConnectorSession session, SchemaTablePrefix prefix)
{
ImmutableMap.Builder<SchemaTableName, List<ColumnMetadata>> columns = ImmutableMap.builder();
for (SchemaTableName tableName : listTables(session, prefix.getSchemaName())) {
ConnectorTableMetadata tableMetadata = getTableMetadata(session, getTableHandle(session, tableName));
columns.put(tableName, tableMetadata.getColumns());
}
return columns.build();
}
@Override
public ColumnMetadata getColumnMetadata(ConnectorSession session, ConnectorTableHandle tableHandle, ColumnHandle columnHandle)
{
String columnName = ((AtopColumnHandle) columnHandle).getName();
for (ColumnMetadata column : getTableMetadata(session, tableHandle).getColumns()) {
if (column.getName().equals(columnName)) {
return column;
}
}
AtopTableHandle atopTableHandle = (AtopTableHandle) tableHandle;
SchemaTableName tableName = new SchemaTableName(atopTableHandle.getSchema(), atopTableHandle.getTable().getName());
throw new ColumnNotFoundException(tableName, columnName);
}
}