CreateDatabaseEvent.java

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package org.apache.doris.datasource.hive.event;

import org.apache.doris.catalog.Env;
import org.apache.doris.common.DdlException;
import org.apache.doris.datasource.ExternalMetaIdMgr;
import org.apache.doris.datasource.MetaIdMappingsLog;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import org.apache.hadoop.hive.metastore.api.NotificationEvent;

import java.util.List;

/**
 * MetastoreEvent for CREATE_DATABASE event type
 */
public class CreateDatabaseEvent extends MetastoreEvent {

    // for test
    public CreateDatabaseEvent(long eventId, String catalogName, String dbName) {
        super(eventId, catalogName, dbName, null, MetastoreEventType.CREATE_DATABASE);
    }

    private CreateDatabaseEvent(NotificationEvent event,
            String catalogName) {
        super(event, catalogName);
        Preconditions.checkArgument(getEventType().equals(MetastoreEventType.CREATE_DATABASE));
    }

    protected static List<MetastoreEvent> getEvents(NotificationEvent event,
            String catalogName) {
        return Lists.newArrayList(new CreateDatabaseEvent(event, catalogName));
    }

    @Override
    protected void process() throws MetastoreNotificationException {
        try {
            logInfo("catalogName:[{}],dbName:[{}]", catalogName, dbName);
            Env.getCurrentEnv().getCatalogMgr().registerExternalDatabaseFromEvent(dbName, catalogName);
        } catch (DdlException e) {
            throw new MetastoreNotificationException(
                    getMsgWithEventInfo("Failed to process event"), e);
        }
    }

    @Override
    protected List<MetaIdMappingsLog.MetaIdMapping> transferToMetaIdMappings() {
        MetaIdMappingsLog.MetaIdMapping metaIdMapping = new MetaIdMappingsLog.MetaIdMapping(
                    MetaIdMappingsLog.OPERATION_TYPE_ADD,
                    MetaIdMappingsLog.META_OBJECT_TYPE_DATABASE,
                    dbName, ExternalMetaIdMgr.nextMetaId());
        return ImmutableList.of(metaIdMapping);
    }
}