文章地址：http://www.haha174.top/article/details/251331
一.构建上下文
再生产环境和开发环境使用的spark 上下文肯定是不一样的比如说sqlContext 在生产用的hivecontext 在开发的时候就用的sqlcontext.
/** * 用户访问session分析Spark作业 * @author Administrator * */
public class UserVisitSessionAnalyzeSpark {
public static void main(String[] args) {
// 构建Spark上下文
SparkConf conf = new SparkConf()
.setAppName(Constants.SPARK.SPARK_APP_NAME_SESSION)
.setMaster("local");
JavaSparkContext sc = new JavaSparkContext(conf);
SQLContext sqlContext = getSQLContext(sc.sc());
// 生成模拟测试数据
mockData(sc, sqlContext);
// 关闭Spark上下文
sc.close();
}
/** * 获取SQLContext * 如果是在本地测试环境的话，那么就生成SQLContext对象 * 如果是在生产环境运行的话，那么就生成HiveContext对象 * @param sc SparkContext * @return SQLContext */
private static SQLContext getSQLContext(SparkContext sc) {
boolean local =GetValueUtils.getBoolean( ConfigurationManager.getProperty(Constants.SPARK.SPARK_LOCAL));
if(local) {
return new SQLContext(sc);
} else {
return new HiveContext(sc);
}
}
/** * 生成模拟数据（只有本地模式，才会去生成模拟数据） * @param sc * @param sqlContext */
private static void mockData(JavaSparkContext sc, SQLContext sqlContext) {
boolean local =GetValueUtils.getBoolean( ConfigurationManager.getProperty(Constants.SPARK.SPARK_LOCAL));
if(local) {
MockData.mock(sc, sqlContext);
}
}
}
二.构建模拟数据
下面构造一些开发用的测试数据
public class MockData {
/** * 弄你数据 * @param sc * @param sqlContext */
public static void mock(JavaSparkContext sc,
SQLContext sqlContext) {
List<Row> rows = new ArrayList<Row>();
String[] searchKeywords = new String[] {"火锅", "蛋糕", "重庆辣子鸡", "重庆小面",
"呷哺呷哺", "新辣道鱼火锅", "国贸大厦", "太古商场", "日本料理", "温泉"};
String date = DateUtils.dateToString(DateUtils.getNowDate());
String[] actions = new String[]{"search", "click", "order", "pay"};
Random random = new Random();
for(int i = 0; i < 100; i++) {
long userid = random.nextInt(100);
for(int j = 0; j < 10; j++) {
String sessionid = UUID.randomUUID().toString().replace("-", "");
String baseActionTime = date + " " + DateUtils.fullZero(random.nextInt(23));
for(int k = 0; k < random.nextInt(100); k++) {
long pageid = random.nextInt(10);
String actionTime = baseActionTime + ":" + DateUtils.fullZero(random.nextInt(59)) + ":" + DateUtils.fullZero(random.nextInt(59));
String searchKeyword = null;
Long clickCategoryId = null;
Long clickProductId = null;
String orderCategoryIds = null;
String orderProductIds = null;
String payCategoryIds = null;
String payProductIds = null;
String action = actions[random.nextInt(4)];
if("search".equals(action)) {
searchKeyword = searchKeywords[random.nextInt(10)];
} else if("click".equals(action)) {
clickCategoryId = Long.valueOf(String.valueOf(random.nextInt(100)));
clickProductId = Long.valueOf(String.valueOf(random.nextInt(100)));
} else if("order".equals(action)) {
orderCategoryIds = String.valueOf(random.nextInt(100));
orderProductIds = String.valueOf(random.nextInt(100));
} else if("pay".equals(action)) {
payCategoryIds = String.valueOf(random.nextInt(100));
payProductIds = String.valueOf(random.nextInt(100));
}
Row row = RowFactory.create(date, userid, sessionid,
pageid, actionTime, searchKeyword,
clickCategoryId, clickProductId,
orderCategoryIds, orderProductIds,
payCategoryIds, payProductIds);
rows.add(row);
}
}
}
JavaRDD<Row> rowsRDD = sc.parallelize(rows);
StructType schema = DataTypes.createStructType(Arrays.asList(
DataTypes.createStructField("date", DataTypes.StringType, true),
DataTypes.createStructField("user_id", DataTypes.LongType, true),
DataTypes.createStructField("session_id", DataTypes.StringType, true),
DataTypes.createStructField("page_id", DataTypes.LongType, true),
DataTypes.createStructField("action_time", DataTypes.StringType, true),
DataTypes.createStructField("search_keyword", DataTypes.StringType, true),
DataTypes.createStructField("click_category_id", DataTypes.LongType, true),
DataTypes.createStructField("click_product_id", DataTypes.LongType, true),
DataTypes.createStructField("order_category_ids", DataTypes.StringType, true),
DataTypes.createStructField("order_product_ids", DataTypes.StringType, true),
DataTypes.createStructField("pay_category_ids", DataTypes.StringType, true),
DataTypes.createStructField("pay_product_ids", DataTypes.StringType, true)));
Dataset df = sqlContext.createDataFrame(rowsRDD, schema);
df.registerTempTable("user_visit_action");
df.show();
for(Row row:(Row[])df.take(1)){
System.out.println(row);
}
/** * ================================================================== */
rows.clear();
String[] sexes = new String[]{"male", "female"};
for(int i = 0; i < 100; i ++) {
long userid = i;
String username = "user" + i;
String name = "name" + i;
int age = random.nextInt(60);
String professional = "professional" + random.nextInt(100);
String city = "city" + random.nextInt(100);
String sex = sexes[random.nextInt(2)];
Row row = RowFactory.create(userid, username, name, age,
professional, city, sex);
rows.add(row);
}
rowsRDD = sc.parallelize(rows);
StructType schema2 = DataTypes.createStructType(Arrays.asList(
DataTypes.createStructField("user_id", DataTypes.LongType, true),
DataTypes.createStructField("username", DataTypes.StringType, true),
DataTypes.createStructField("name", DataTypes.StringType, true),
DataTypes.createStructField("age", DataTypes.IntegerType, true),
DataTypes.createStructField("professional", DataTypes.StringType, true),
DataTypes.createStructField("city", DataTypes.StringType, true),
DataTypes.createStructField("sex", DataTypes.StringType, true)));
Dataset df2 = sqlContext.createDataFrame(rowsRDD, schema2);
df.show();
for(Row row:(Row[])df.take(1)){
System.out.println(row);
}
df2.registerTempTable("user_info");
}
}
