com.conversantmedia.mapreduce.mrunit.UnitTestDistributedResourceManager.java Source code

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Here is the source code for com.conversantmedia.mapreduce.mrunit.UnitTestDistributedResourceManager.java

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package com.conversantmedia.mapreduce.mrunit;

/*
 * #%L
 * Mara Unit Test Framework
 * ~~
 * Copyright (C) 2015 Conversant
 * ~~
 * 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.
 * #L%
 */

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;

import org.apache.commons.lang3.StringUtils;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.log4j.Logger;
import org.springframework.core.annotation.AnnotationUtils;

import com.conversantmedia.mapreduce.tool.DistributedResourceManager;
import com.conversantmedia.mapreduce.tool.annotation.Distribute;
import com.conversantmedia.mapreduce.tool.annotation.handler.MaraAnnotationUtil;

/**
 *
 *
 */
public class UnitTestDistributedResourceManager {

    @SuppressWarnings("rawtypes")
    public void setupDistributedResources(String testName, Class<?> clazz, Object testBean, Mapper mapper,
            Reducer reducer) throws Exception {
        // Search for annotated resources to distribute
        List<String> properties = new ArrayList<>();
        addDistributedProperties(clazz, properties);

        // Now retrieve property values from unit test bean
        Map<String, Object> values = new HashMap<>();
        for (String property : properties) {
            // First look for test-specific getter suffix'd by the test name:
            String testProperty = property + "_" + testName;
            Object value = getBeanValue(testProperty, testBean);
            if (value == null) {
                value = getBeanValue(property, testBean);
            }
            if (value != null) {
                values.put(property, value);
            }
        }

        if (values.size() > 0) {
            if (mapper != null) {
                distributeValue(values, mapper);
            }
            if (reducer != null) {
                distributeValue(values, reducer);
            }
        }
    }

    protected Object getBeanValue(String property, Object bean) {
        Object value = null;
        String methodName = "get" + StringUtils.capitalize(property);
        try {
            Method method = bean.getClass().getDeclaredMethod(methodName);
            method.setAccessible(true);
            value = method.invoke(bean);
        } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException
                | InvocationTargetException e) {
            logger().info("Unable to find method [" + methodName + "] for distributed resource.");
        }

        return value;
    }

    protected void distributeValue(Map<String, Object> values, Object bean)
            throws IllegalArgumentException, IllegalAccessException {
        @SuppressWarnings("unchecked")
        List<Field> fields = MaraAnnotationUtil.INSTANCE.findAnnotatedFields(bean.getClass(), Resource.class);
        for (Field field : fields) {
            Resource resAnnotation = field.getAnnotation(Resource.class);
            String property = StringUtils.isEmpty(resAnnotation.name()) ? field.getName() : resAnnotation.name();
            Object value = values.get(property);
            if (value != null) {
                DistributedResourceManager.setFieldValue(field, bean, value);
            }
        }
    }

    @SuppressWarnings("unchecked")
    protected void addDistributedProperties(Class<?> clazz, List<String> properties) {
        Distribute distribute;
        MaraAnnotationUtil util = MaraAnnotationUtil.INSTANCE;
        List<Field> fields = util.findAnnotatedFields(clazz, Distribute.class);
        for (Field field : fields) {
            distribute = field.getAnnotation(Distribute.class);
            String prop = StringUtils.isBlank(distribute.name()) ? field.getName() : distribute.name();
            properties.add(prop);
        }

        List<Method> methods = util.findAnnotatedMethods(clazz, Distribute.class);
        for (Method method : methods) {
            distribute = AnnotationUtils.findAnnotation(method, Distribute.class);
            String defaultName = StringUtils.uncapitalize(StringUtils.removeStart(method.getName(), "get"));
            String prop = StringUtils.isBlank(distribute.name()) ? defaultName : distribute.name();
            properties.add(prop);
        }
    }

    protected Logger logger() {
        return Logger.getLogger(this.getClass());
    }
}