io.druid.metadata.DerbyMetadataStorageActionHandler.java Source code

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Here is the source code for io.druid.metadata.DerbyMetadataStorageActionHandler.java

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.metadata;

import com.fasterxml.jackson.databind.ObjectMapper;
import io.druid.java.util.common.StringUtils;
import org.joda.time.DateTime;
import org.skife.jdbi.v2.Handle;
import org.skife.jdbi.v2.Query;

import javax.annotation.Nullable;
import java.util.Map;

public class DerbyMetadataStorageActionHandler<EntryType, StatusType, LogType, LockType>
        extends SQLMetadataStorageActionHandler<EntryType, StatusType, LogType, LockType> {
    DerbyMetadataStorageActionHandler(SQLMetadataConnector connector, ObjectMapper jsonMapper,
            MetadataStorageActionHandlerTypes<EntryType, StatusType, LogType, LockType> types, String entryTypeName,
            String entryTable, String logTable, String lockTable) {
        super(connector, jsonMapper, types, entryTypeName, entryTable, logTable, lockTable);
    }

    @Override
    protected Query<Map<String, Object>> createInactiveStatusesSinceQuery(Handle handle, DateTime timestamp,
            @Nullable Integer maxNumStatuses) {
        String sql = StringUtils.format(
                "SELECT " + "  id, " + "  status_payload " + "FROM " + "  %s " + "WHERE "
                        + "  active = FALSE AND created_date >= :start " + "ORDER BY created_date DESC",
                getEntryTable());

        if (maxNumStatuses != null) {
            sql += " FETCH FIRST :n ROWS ONLY";
        }

        Query<Map<String, Object>> query = handle.createQuery(sql).bind("start", timestamp.toString());

        if (maxNumStatuses != null) {
            query = query.bind("n", maxNumStatuses);
        }
        return query;
    }
}