hazelcast-master/hazelcast-sql/src/main/java/com/hazelcast/jet/sql/impl/schema/AbstractSchemaStorage.java
/*
 * Copyright 2023 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.jet.sql.impl.schema;

import com.hazelcast.core.EntryEvent;
import com.hazelcast.core.EntryListener;
import com.hazelcast.map.IMap;
import com.hazelcast.map.MapEvent;
import com.hazelcast.spi.impl.NodeEngine;

import java.util.Collection;

import static com.hazelcast.jet.impl.JetServiceBackend.SQL_CATALOG_MAP_NAME;

public abstract class AbstractSchemaStorage {
    protected final NodeEngine nodeEngine;

    AbstractSchemaStorage(NodeEngine nodeEngine) {
        this.nodeEngine = nodeEngine;
    }

    void initializeWithListener(EntryListener<String, Object> listener) {
        if (!nodeEngine.getLocalMember().isLiteMember()) {
            storage().addEntryListener(listener, false);
        }
    }

    Collection<Object> allObjects() {
        return storage().values();
    }

    IMap<String, Object> storage() {
        return nodeEngine.getHazelcastInstance().getMap(SQL_CATALOG_MAP_NAME);
    }

    abstract static class EntryListenerAdapter implements EntryListener<String, Object> {

        @Override
        public final void entryAdded(EntryEvent<String, Object> event) {
        }

        @Override
        public abstract void entryUpdated(EntryEvent<String, Object> event);

        @Override
        public abstract void entryRemoved(EntryEvent<String, Object> event);

        @Override
        public final void entryEvicted(EntryEvent<String, Object> event) {
            throw new UnsupportedOperationException("SQL catalog entries must never be evicted - " + event);
        }

        @Override
        public void entryExpired(EntryEvent<String, Object> event) {
            throw new UnsupportedOperationException("SQL catalog entries must never be expired - " + event);
        }

        @Override
        public final void mapCleared(MapEvent event) {
            throw new UnsupportedOperationException("SQL catalog must never be cleared - " + event);
        }

        @Override
        public final void mapEvicted(MapEvent event) {
            throw new UnsupportedOperationException("SQL catalog must never be evicted - " + event);
        }
    }
}
