mantis-examples/mantis-examples-synthetic-sourcejob/src/main/java/io/mantisrx/sourcejob/synthetic/core/MQLQueryManager.java [24:63]:
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public class MQLQueryManager {

    static class LazyHolder {

        private static final MQLQueryManager INSTANCE = new MQLQueryManager();
    }

    private ConcurrentHashMap<String, Query> 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<Query> 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());
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mantis-source-jobs/mantis-source-job-kafka/src/main/java/io/mantisrx/sourcejob/kafka/sink/MQLQueryManager.java [24:63]:
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public class MQLQueryManager {

    static class LazyHolder {

        private static final MQLQueryManager INSTANCE = new MQLQueryManager();
    }

    private ConcurrentHashMap<String, Query> 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<Query> 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());
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