org.springframework.yarn.support.compat.ResourceCompat.java Source code

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Here is the source code for org.springframework.yarn.support.compat.ResourceCompat.java

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/*
 * Copyright 2013 the original author or authors.
 *
 * 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 org.springframework.yarn.support.compat;

import java.lang.reflect.Method;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.yarn.api.records.Resource;
import org.springframework.util.ReflectionUtils;

/**
 * Compat class for {@link Resource}.
 *
 * @author Janne Valkealahti
 *
 */
public class ResourceCompat {

    private final static Log log = LogFactory.getLog(ResourceCompat.class);

    /** Method for {@link Resource#setVirtualCores(int)}*/
    private static Method setVirtualCores;

    /**
     * Invokes {@link Resource#setVirtualCores(int)}.
     *
     * @param resource the target object
     * @param vCores the vCores
     */
    public static void setVirtualCores(Resource resource, int vCores) {
        if (setVirtualCores == null) {
            setVirtualCores = ReflectionUtils.findMethod(Resource.class, "setVirtualCores", int.class);
        }
        if (setVirtualCores != null) {
            ReflectionUtils.invokeMethod(setVirtualCores, resource, vCores);
        } else {
            log.warn("Method setVirtualCores(int) is not implemented");
        }
    }

}