org.apache.impala.yarn.server.resourcemanager.scheduler.fair.FairSchedulerConfiguration.java Source code

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Here is the source code for org.apache.impala.yarn.server.resourcemanager.scheduler.fair.FairSchedulerConfiguration.java

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/**
 * 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.impala.yarn.server.resourcemanager.scheduler.fair;
//YARNUTIL: MODIFIED

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.impala.yarn.server.utils.BuilderUtils;

public class FairSchedulerConfiguration extends Configuration {

    private static final String CONF_PREFIX = "yarn.scheduler.fair.";

    public static final String ALLOCATION_FILE = CONF_PREFIX + "allocation.file";
    protected static final String DEFAULT_ALLOCATION_FILE = "fair-scheduler.xml";

    /** Whether pools can be created that were not specified in the FS configuration file
     */
    protected static final String ALLOW_UNDECLARED_POOLS = CONF_PREFIX + "allow-undeclared-pools";
    protected static final boolean DEFAULT_ALLOW_UNDECLARED_POOLS = true;

    /**
     * Whether to use the user name as the queue name (instead of "default") if
     * the request does not specify a queue.
     */
    protected static final String USER_AS_DEFAULT_QUEUE = CONF_PREFIX + "user-as-default-queue";
    protected static final boolean DEFAULT_USER_AS_DEFAULT_QUEUE = true;

    /**
     * Parses a resource config value of a form like "1024", "1024 mb",
     * or "1024 mb, 3 vcores". If no units are given, megabytes are assumed.
     *
     * @throws AllocationConfigurationException
     */
    public static Resource parseResourceConfigValue(String val) throws AllocationConfigurationException {
        try {
            val = val.toLowerCase();
            int memory = findResource(val, "mb");
            int vcores = findResource(val, "vcores");
            return BuilderUtils.newResource(memory, vcores);
        } catch (AllocationConfigurationException ex) {
            throw ex;
        } catch (Exception ex) {
            throw new AllocationConfigurationException("Error reading resource config", ex);
        }
    }

    private static int findResource(String val, String units) throws AllocationConfigurationException {
        Pattern pattern = Pattern.compile("(\\d+)(\\.\\d*)?\\s*" + units);
        Matcher matcher = pattern.matcher(val);
        if (!matcher.find()) {
            throw new AllocationConfigurationException("Missing resource: " + units);
        }
        return Integer.parseInt(matcher.group(1));
    }
}