本文整理汇总了Java中org.apache.hadoop.mapred.lib.db.DBInputFormat.NullDBWritable类的典型用法代码示例。如果您正苦于以下问题：Java NullDBWritable类的具体用法？Java NullDBWritable怎么用？Java NullDBWritable使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
NullDBWritable类属于org.apache.hadoop.mapred.lib.db.DBInputFormat包，在下文中一共展示了NullDBWritable类的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testDBInputFormat
import org.apache.hadoop.mapred.lib.db.DBInputFormat.NullDBWritable; //导入依赖的package包/类
/**
* test DBInputFormat class. Class should split result for chunks
* @throws Exception
*/
@Test(timeout = 10000)
public void testDBInputFormat() throws Exception {
JobConf configuration = new JobConf();
setupDriver(configuration);
DBInputFormat<NullDBWritable> format = new DBInputFormat<NullDBWritable>();
format.setConf(configuration);
format.setConf(configuration);
DBInputFormat.DBInputSplit splitter = new DBInputFormat.DBInputSplit(1, 10);
Reporter reporter = mock(Reporter.class);
RecordReader<LongWritable, NullDBWritable> reader = format.getRecordReader(
splitter, configuration, reporter);
configuration.setInt(MRJobConfig.NUM_MAPS, 3);
InputSplit[] lSplits = format.getSplits(configuration, 3);
assertEquals(5, lSplits[0].getLength());
assertEquals(3, lSplits.length);
// test reader .Some simple tests
assertEquals(LongWritable.class, reader.createKey().getClass());
assertEquals(0, reader.getPos());
assertEquals(0, reader.getProgress(), 0.001);
reader.close();
}
示例2: testDBRecordReader
import org.apache.hadoop.mapred.lib.db.DBInputFormat.NullDBWritable; //导入依赖的package包/类
/**
*
* test DBRecordReader. This reader should creates keys, values, know about position..
*/
@SuppressWarnings("unchecked")
@Test (timeout = 5000)
public void testDBRecordReader() throws Exception {
JobConf job = mock(JobConf.class);
DBConfiguration dbConfig = mock(DBConfiguration.class);
String[] fields = { "field1", "filed2" };
@SuppressWarnings("rawtypes")
DBRecordReader reader = new DBInputFormat<NullDBWritable>().new DBRecordReader(
new DBInputSplit(), NullDBWritable.class, job,
DriverForTest.getConnection(), dbConfig, "condition", fields, "table");
LongWritable key = reader.createKey();
assertEquals(0, key.get());
DBWritable value = reader.createValue();
assertEquals(
"org.apache.hadoop.mapred.lib.db.DBInputFormat$NullDBWritable", value
.getClass().getName());
assertEquals(0, reader.getPos());
assertFalse(reader.next(key, value));
}
示例3: testSetInput
import org.apache.hadoop.mapred.lib.db.DBInputFormat.NullDBWritable; //导入依赖的package包/类
/**
* test configuration for db. should works DBConfiguration.* parameters.
*/
@Test (timeout = 5000)
public void testSetInput() {
JobConf configuration = new JobConf();
String[] fieldNames = { "field1", "field2" };
DBInputFormat.setInput(configuration, NullDBWritable.class, "table",
"conditions", "orderBy", fieldNames);
assertEquals(
"org.apache.hadoop.mapred.lib.db.DBInputFormat$NullDBWritable",
configuration.getClass(DBConfiguration.INPUT_CLASS_PROPERTY, null)
.getName());
assertEquals("table",
configuration.get(DBConfiguration.INPUT_TABLE_NAME_PROPERTY, null));
String[] fields = configuration
.getStrings(DBConfiguration.INPUT_FIELD_NAMES_PROPERTY);
assertEquals("field1", fields[0]);
assertEquals("field2", fields[1]);
assertEquals("conditions",
configuration.get(DBConfiguration.INPUT_CONDITIONS_PROPERTY, null));
assertEquals("orderBy",
configuration.get(DBConfiguration.INPUT_ORDER_BY_PROPERTY, null));
configuration = new JobConf();
DBInputFormat.setInput(configuration, NullDBWritable.class, "query",
"countQuery");
assertEquals("query", configuration.get(DBConfiguration.INPUT_QUERY, null));
assertEquals("countQuery",
configuration.get(DBConfiguration.INPUT_COUNT_QUERY, null));
JobConf jConfiguration = new JobConf();
DBConfiguration.configureDB(jConfiguration, "driverClass", "dbUrl", "user",
"password");
assertEquals("driverClass",
jConfiguration.get(DBConfiguration.DRIVER_CLASS_PROPERTY));
assertEquals("dbUrl", jConfiguration.get(DBConfiguration.URL_PROPERTY));
assertEquals("user", jConfiguration.get(DBConfiguration.USERNAME_PROPERTY));
assertEquals("password",
jConfiguration.get(DBConfiguration.PASSWORD_PROPERTY));
jConfiguration = new JobConf();
DBConfiguration.configureDB(jConfiguration, "driverClass", "dbUrl");
assertEquals("driverClass",
jConfiguration.get(DBConfiguration.DRIVER_CLASS_PROPERTY));
assertEquals("dbUrl", jConfiguration.get(DBConfiguration.URL_PROPERTY));
assertNull(jConfiguration.get(DBConfiguration.USERNAME_PROPERTY));
assertNull(jConfiguration.get(DBConfiguration.PASSWORD_PROPERTY));
}
示例4: getInputClass
import org.apache.hadoop.mapred.lib.db.DBInputFormat.NullDBWritable; //导入依赖的package包/类
Class<?> getInputClass() {
return job.getClass(DBConfiguration.INPUT_CLASS_PROPERTY, NullDBWritable.class);
}