io.mantisrx.sourcejob.kafka.sink.MQLQueryManager Maven / Gradle / Ivy
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/*
* Copyright 2019 Netflix, Inc.
*
* 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 io.mantisrx.sourcejob.kafka.sink;
import io.mantisrx.mql.jvm.core.Query;
import java.util.Collection;
import java.util.concurrent.ConcurrentHashMap;
public class MQLQueryManager {
static class LazyHolder {
private static final MQLQueryManager INSTANCE = new MQLQueryManager();
}
private ConcurrentHashMap queries = new ConcurrentHashMap<>();
public static MQLQueryManager getInstance() {
return LazyHolder.INSTANCE;
}
private MQLQueryManager() { }
public void registerQuery(String id, String query) {
query = MQL.transformLegacyQuery(query);
Query q = MQL.makeQuery(id, query);
queries.put(id, q);
}
public void deregisterQuery(String id) {
queries.remove(id);
}
public Collection getRegisteredQueries() {
return queries.values();
}
public void clear() {
queries.clear();
}
public static void main(String[] args) throws Exception {
MQLQueryManager qm = getInstance();
String query = "SELECT * WHERE true SAMPLE {\"strategy\":\"RANDOM\",\"threshold\":1}";
qm.registerQuery("fake2", query);
System.out.println(MQL.parses(MQL.transformLegacyQuery(query)));
System.out.println(MQL.getParseError(MQL.transformLegacyQuery(query)));
System.out.println(qm.getRegisteredQueries());
}
}