io.druid.cli.convert.DatabasePropertiesConverter.java Source code

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Here is the source code for io.druid.cli.convert.DatabasePropertiesConverter.java

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * Licensed 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.cli.convert;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicBoolean;

/**
 */
public class DatabasePropertiesConverter implements PropertyConverter {

    private final List<String> tableProperties = Lists.newArrayList("druid.database.segmentTable",
            "druid.database.configTable", "druid.database.ruleTable", "druid.database.taskLockTable",
            "druid.database.taskLogTable", "druid.database.taskTable");
    private AtomicBoolean ran = new AtomicBoolean(false);

    @Override
    public boolean canHandle(String property) {
        return tableProperties.contains(property) && !ran.get();
    }

    @Override
    public Map<String, String> convert(Properties properties) {
        if (!ran.getAndSet(true)) {
            String tablePrefix = properties.getProperty("druid.database.segmentTable");

            if (tablePrefix == null) {
                tablePrefix = "druid";
            } else {
                tablePrefix = tablePrefix.split("_")[0];
            }

            Map<String, String> retVal = Maps.newLinkedHashMap();

            retVal.put("druid.db.tables.base", tablePrefix);

            addIfNotDefault(properties, tablePrefix, retVal, "druid.database.segmentTable", "segments");
            addIfNotDefault(properties, tablePrefix, retVal, "druid.database.configTable", "config");
            addIfNotDefault(properties, tablePrefix, retVal, "druid.database.ruleTable", "rules");
            addIfNotDefault(properties, tablePrefix, retVal, "druid.database.taskTable", "tasks");
            addIfNotDefault(properties, tablePrefix, retVal, "druid.database.taskLockTable", "taskLock");
            addIfNotDefault(properties, tablePrefix, retVal, "druid.database.taskLogTable", "taskLog");

            return retVal;
        }
        return ImmutableMap.of();
    }

    private void addIfNotDefault(Properties properties, String tablePrefix, Map<String, String> retVal,
            String property, String tablename) {
        final String value = properties.getProperty(property);
        if (value != null) {
            if (!value.equals(String.format("%s_%s", tablePrefix, tablename))) {
                retVal.put(String.format("druid.db.tables.%s", tablename), value);
            }
        }
    }
}