modules/catalog/src/main/java/org/apache/ignite/internal/catalog/events/CatalogEvent.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.ignite.internal.catalog.events;

import org.apache.ignite.internal.catalog.descriptors.CatalogIndexStatus;
import org.apache.ignite.internal.event.Event;

/**
 * Catalog management events.
 */
public enum CatalogEvent implements Event {
    /** This event is fired, when a table was created in Catalog. */
    TABLE_CREATE,

    /** This event is fired, when a table was dropped in Catalog. */
    TABLE_DROP,

    /** This event is fired when a table has been renamed or a column has been modified, added to, or removed from a table. */
    TABLE_ALTER,

    /** This event is fired, when an index was created in Catalog. */
    INDEX_CREATE,

    /** This event is fired when the index is ready to start building. */
    INDEX_BUILDING,

    /** This event is fired when the index becomes available, i.e. the index has been built. */
    INDEX_AVAILABLE,

    /**
     * This event is fired when an {@link CatalogIndexStatus#AVAILABLE} index was dropped in the Catalog (so it's switched to
     * the {@link CatalogIndexStatus#STOPPING} state), but not its table.
     */
    INDEX_STOPPING,

    /**
     *  Fired when an index is removed from the Catalog. This happens when an index that never was {@link CatalogIndexStatus#AVAILABLE}
     *  gets dropped, or when an index that is {@link CatalogIndexStatus#STOPPING} is finished with and we don't need to keep it in
     *  the Catalog anymore, or when an index gets dropped because its table gets dropped.
     */
    INDEX_REMOVED,

    /** This event is fired, when a distribution zone was created in Catalog. */
    ZONE_CREATE,

    /** This event is fired, when a distribution zone was dropped in Catalog. */
    ZONE_DROP,

    /** This event is fired, when a distribution zone was changed in Catalog. */
    ZONE_ALTER,

    /** This event is fired, when a system view was created in Catalog. */
    SYSTEM_VIEW_CREATE,

    /** This event is fired, when a zone is marked as the default zone. */
    SET_DEFAULT_ZONE;
}