/*
* 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.metadata;
import com.facebook.presto.connector.ConnectorId;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.SchemaTableName;
import com.facebook.presto.spi.procedure.Procedure;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.spi.type.TypeManager;
import com.google.common.collect.Maps;
import com.google.common.primitives.Primitives;
import javax.annotation.concurrent.ThreadSafe;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static com.facebook.presto.spi.StandardErrorCode.PROCEDURE_NOT_FOUND;
import static com.facebook.presto.spi.procedure.Procedure.Argument;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.BooleanType.BOOLEAN;
import static com.facebook.presto.spi.type.DoubleType.DOUBLE;
import static com.facebook.presto.spi.type.StandardTypes.ARRAY;
import static com.facebook.presto.spi.type.StandardTypes.MAP;
import static com.facebook.presto.spi.type.VarcharType.VARCHAR;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
import static java.util.stream.Collectors.toList;
@ThreadSafe
public class ProcedureRegistry
{
private final Map<ConnectorId, Map<SchemaTableName, Procedure>> connectorProcedures = new ConcurrentHashMap<>();
private final TypeManager typeManager;
public ProcedureRegistry(TypeManager typeManager)
{
this.typeManager = requireNonNull(typeManager, "typeManager is null");
}
public void addProcedures(ConnectorId connectorId, Collection<Procedure> procedures)
{
requireNonNull(connectorId, "connectorId is null");
requireNonNull(procedures, "procedures is null");
procedures.forEach(this::validateProcedure);
Map<SchemaTableName, Procedure> proceduresByName = Maps.uniqueIndex(
procedures,
procedure -> new SchemaTableName(procedure.getSchema(), procedure.getName()));
checkState(connectorProcedures.putIfAbsent(connectorId, proceduresByName) == null, "Procedures already registered for connector: %s", connectorId);
}
public void removeProcedures(ConnectorId connectorId)
{
connectorProcedures.remove(connectorId);
}
public Procedure resolve(ConnectorId connectorId, SchemaTableName name)
{
Map<SchemaTableName, Procedure> procedures = connectorProcedures.get(connectorId);
if (procedures != null) {
Procedure procedure = procedures.get(name);
if (procedure != null) {
return procedure;
}
}
throw new PrestoException(PROCEDURE_NOT_FOUND, "Procedure not registered: " + name);
}
private void validateProcedure(Procedure procedure)
{
List<Class<?>> parameters = procedure.getMethodHandle().type().parameterList().stream()
.filter(type -> !ConnectorSession.class.isAssignableFrom(type))
.collect(toList());
for (int i = 0; i < procedure.getArguments().size(); i++) {
Argument argument = procedure.getArguments().get(i);
Type type = typeManager.getType(argument.getType());
checkArgument(type != null, "Unknown argument type: %s", argument.getType());
Class<?> argumentType = Primitives.unwrap(parameters.get(i));
Class<?> expectedType = getObjectType(type);
checkArgument(expectedType.equals(argumentType),
"Argument '%s' has invalid type %s (expected %s)",
argument.getName(),
argumentType.getName(),
expectedType.getName());
}
}
private static Class<?> getObjectType(Type type)
{
if (type.equals(BOOLEAN)) {
return boolean.class;
}
if (type.equals(BIGINT)) {
return long.class;
}
if (type.equals(DOUBLE)) {
return double.class;
}
if (type.equals(VARCHAR)) {
return String.class;
}
if (type.getTypeSignature().getBase().equals(ARRAY)) {
getObjectType(type.getTypeParameters().get(0));
return List.class;
}
if (type.getTypeSignature().getBase().equals(MAP)) {
getObjectType(type.getTypeParameters().get(0));
getObjectType(type.getTypeParameters().get(1));
return Map.class;
}
throw new IllegalArgumentException("Unsupported argument type: " + type.getDisplayName());
}
}