/*
* 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.execution;
import com.facebook.presto.SessionRepresentation;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import javax.annotation.Nullable;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.regex.Pattern;
import static com.google.common.base.Preconditions.checkArgument;
import static java.lang.String.format;
import static java.util.Objects.requireNonNull;
public class QueryQueueRule
{
@Nullable
private final Pattern userRegex;
@Nullable
private final Pattern sourceRegex;
private final Map<String, Pattern> sessionPropertyRegexes;
private final List<QueryQueueDefinition> queues;
QueryQueueRule(@Nullable Pattern userRegex, @Nullable Pattern sourceRegex, Map<String, Pattern> sessionPropertyRegexes, List<QueryQueueDefinition> queues)
{
this.userRegex = userRegex;
this.sourceRegex = sourceRegex;
this.sessionPropertyRegexes = ImmutableMap.copyOf(requireNonNull(sessionPropertyRegexes, "sessionPropertyRegexes is null"));
requireNonNull(queues, "queues is null");
checkArgument(!queues.isEmpty(), "queues is empty");
this.queues = ImmutableList.copyOf(queues);
}
public static QueryQueueRule createRule(@Nullable Pattern userRegex, @Nullable Pattern sourceRegex, Map<String, Pattern> sessionPropertyRegexes, List<String> queueKeys, Map<String, QueryQueueDefinition> definedQueues)
{
ImmutableList.Builder<QueryQueueDefinition> queues = ImmutableList.builder();
for (String key : queueKeys) {
if (!definedQueues.containsKey(key)) {
throw new IllegalArgumentException(format("Undefined queue %s. Defined queues are %s", key, definedQueues.keySet()));
}
queues.add(definedQueues.get(key));
}
return new QueryQueueRule(userRegex, sourceRegex, sessionPropertyRegexes, queues.build());
}
public Optional<List<QueryQueueDefinition>> match(SessionRepresentation session)
{
if (userRegex != null && !userRegex.matcher(session.getUser()).matches()) {
return Optional.empty();
}
if (sourceRegex != null) {
String source = session.getSource().orElse("");
if (!sourceRegex.matcher(source).matches()) {
return Optional.empty();
}
}
for (Map.Entry<String, Pattern> entry : sessionPropertyRegexes.entrySet()) {
String value = session.getSystemProperties().getOrDefault(entry.getKey(), "");
if (!entry.getValue().matcher(value).matches()) {
return Optional.empty();
}
}
return Optional.of(queues);
}
List<QueryQueueDefinition> getQueues()
{
return queues;
}
}