本文整理汇总了Java中org.apache.hadoop.mapred.JobConf.setMapperClass方法的典型用法代码示例。如果您正苦于以下问题:Java JobConf.setMapperClass方法的具体用法?Java JobConf.setMapperClass怎么用?Java JobConf.setMapperClass使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.mapred.JobConf
的用法示例。
在下文中一共展示了JobConf.setMapperClass方法的15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: runTests
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
/**
* Run the test
*
* @throws IOException on error
*/
public static void runTests() throws IOException {
config.setLong("io.bytes.per.checksum", bytesPerChecksum);
JobConf job = new JobConf(config, NNBench.class);
job.setJobName("NNBench-" + operation);
FileInputFormat.setInputPaths(job, new Path(baseDir, CONTROL_DIR_NAME));
job.setInputFormat(SequenceFileInputFormat.class);
// Explicitly set number of max map attempts to 1.
job.setMaxMapAttempts(1);
// Explicitly turn off speculative execution
job.setSpeculativeExecution(false);
job.setMapperClass(NNBenchMapper.class);
job.setReducerClass(NNBenchReducer.class);
FileOutputFormat.setOutputPath(job, new Path(baseDir, OUTPUT_DIR_NAME));
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(Text.class);
job.setNumReduceTasks((int) numberOfReduces);
JobClient.runJob(job);
}
示例2: testInputFormat
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
void testInputFormat(Class<? extends InputFormat> clazz) throws IOException {
final JobConf job = MapreduceTestingShim.getJobConf(mrCluster);
job.setInputFormat(clazz);
job.setOutputFormat(NullOutputFormat.class);
job.setMapperClass(ExampleVerifier.class);
job.setNumReduceTasks(0);
LOG.debug("submitting job.");
final RunningJob run = JobClient.runJob(job);
assertTrue("job failed!", run.isSuccessful());
assertEquals("Saw the wrong number of instances of the filtered-for row.", 2, run.getCounters()
.findCounter(TestTableInputFormat.class.getName() + ":row", "aaa").getCounter());
assertEquals("Saw any instances of the filtered out row.", 0, run.getCounters()
.findCounter(TestTableInputFormat.class.getName() + ":row", "bbb").getCounter());
assertEquals("Saw the wrong number of instances of columnA.", 1, run.getCounters()
.findCounter(TestTableInputFormat.class.getName() + ":family", "columnA").getCounter());
assertEquals("Saw the wrong number of instances of columnB.", 1, run.getCounters()
.findCounter(TestTableInputFormat.class.getName() + ":family", "columnB").getCounter());
assertEquals("Saw the wrong count of values for the filtered-for row.", 2, run.getCounters()
.findCounter(TestTableInputFormat.class.getName() + ":value", "value aaa").getCounter());
assertEquals("Saw the wrong count of values for the filtered-out row.", 0, run.getCounters()
.findCounter(TestTableInputFormat.class.getName() + ":value", "value bbb").getCounter());
}
示例3: runIOTest
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
private void runIOTest(
Class<? extends Mapper<Text, LongWritable, Text, Text>> mapperClass,
Path outputDir) throws IOException {
JobConf job = new JobConf(config, TestDFSIO.class);
FileInputFormat.setInputPaths(job, getControlDir(config));
job.setInputFormat(SequenceFileInputFormat.class);
job.setMapperClass(mapperClass);
job.setReducerClass(AccumulatingReducer.class);
FileOutputFormat.setOutputPath(job, outputDir);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(Text.class);
job.setNumReduceTasks(1);
JobClient.runJob(job);
}
示例4: getJob
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
/**
* Sets up a job conf for the given job using the given config object. Ensures
* that the correct input format is set, the mapper and and reducer class and
* the input and output keys and value classes along with any other job
* configuration.
*
* @param config
* @return JobConf representing the job to be ran
* @throws IOException
*/
private JobConf getJob(ConfigExtractor config) throws IOException {
JobConf job = new JobConf(config.getConfig(), SliveTest.class);
job.setInputFormat(DummyInputFormat.class);
FileOutputFormat.setOutputPath(job, config.getOutputPath());
job.setMapperClass(SliveMapper.class);
job.setPartitionerClass(SlivePartitioner.class);
job.setReducerClass(SliveReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(Text.class);
job.setOutputFormat(TextOutputFormat.class);
TextOutputFormat.setCompressOutput(job, false);
job.setNumReduceTasks(config.getReducerAmount());
job.setNumMapTasks(config.getMapAmount());
return job;
}
示例5: joinAs
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
private static void joinAs(String jointype,
Class<? extends SimpleCheckerBase> c) throws Exception {
final int srcs = 4;
Configuration conf = new Configuration();
JobConf job = new JobConf(conf, c);
Path base = cluster.getFileSystem().makeQualified(new Path("/"+jointype));
Path[] src = writeSimpleSrc(base, conf, srcs);
job.set("mapreduce.join.expr", CompositeInputFormat.compose(jointype,
SequenceFileInputFormat.class, src));
job.setInt("testdatamerge.sources", srcs);
job.setInputFormat(CompositeInputFormat.class);
FileOutputFormat.setOutputPath(job, new Path(base, "out"));
job.setMapperClass(c);
job.setReducerClass(c);
job.setOutputKeyClass(IntWritable.class);
job.setOutputValueClass(IntWritable.class);
JobClient.runJob(job);
base.getFileSystem(job).delete(base, true);
}
示例6: testEmptyJoin
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
public void testEmptyJoin() throws Exception {
JobConf job = new JobConf();
Path base = cluster.getFileSystem().makeQualified(new Path("/empty"));
Path[] src = { new Path(base,"i0"), new Path("i1"), new Path("i2") };
job.set("mapreduce.join.expr", CompositeInputFormat.compose("outer",
Fake_IF.class, src));
job.setInputFormat(CompositeInputFormat.class);
FileOutputFormat.setOutputPath(job, new Path(base, "out"));
job.setMapperClass(IdentityMapper.class);
job.setReducerClass(IdentityReducer.class);
job.setOutputKeyClass(IncomparableKey.class);
job.setOutputValueClass(NullWritable.class);
JobClient.runJob(job);
base.getFileSystem(job).delete(base, true);
}
示例7: createCopyJob
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
/**
* Creates a simple copy job.
*
* @param indirs List of input directories.
* @param outdir Output directory.
* @return JobConf initialised for a simple copy job.
* @throws Exception If an error occurs creating job configuration.
*/
static JobConf createCopyJob(List<Path> indirs, Path outdir) throws Exception {
Configuration defaults = new Configuration();
JobConf theJob = new JobConf(defaults, TestJobControl.class);
theJob.setJobName("DataMoveJob");
FileInputFormat.setInputPaths(theJob, indirs.toArray(new Path[0]));
theJob.setMapperClass(DataCopy.class);
FileOutputFormat.setOutputPath(theJob, outdir);
theJob.setOutputKeyClass(Text.class);
theJob.setOutputValueClass(Text.class);
theJob.setReducerClass(DataCopy.class);
theJob.setNumMapTasks(12);
theJob.setNumReduceTasks(4);
return theJob;
}
示例8: initMultiTableSnapshotMapperJob
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
/**
* Sets up the job for reading from one or more multiple table snapshots, with one or more scans
* per snapshot.
* It bypasses hbase servers and read directly from snapshot files.
*
* @param snapshotScans map of snapshot name to scans on that snapshot.
* @param mapper The mapper class to use.
* @param outputKeyClass The class of the output key.
* @param outputValueClass The class of the output value.
* @param job The current job to adjust. Make sure the passed job is
* carrying all necessary HBase configuration.
* @param addDependencyJars upload HBase jars and jars for any of the configured
* job classes via the distributed cache (tmpjars).
*/
public static void initMultiTableSnapshotMapperJob(Map<String, Collection<Scan>> snapshotScans,
Class<? extends TableMap> mapper, Class<?> outputKeyClass, Class<?> outputValueClass,
JobConf job, boolean addDependencyJars, Path tmpRestoreDir) throws IOException {
MultiTableSnapshotInputFormat.setInput(job, snapshotScans, tmpRestoreDir);
job.setInputFormat(MultiTableSnapshotInputFormat.class);
if (outputValueClass != null) {
job.setMapOutputValueClass(outputValueClass);
}
if (outputKeyClass != null) {
job.setMapOutputKeyClass(outputKeyClass);
}
job.setMapperClass(mapper);
if (addDependencyJars) {
addDependencyJars(job);
}
org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil.resetCacheConfig(job);
}
示例9: runJob
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
@Override
protected void runJob(String jobName, Configuration c, List<Scan> scans)
throws IOException, InterruptedException, ClassNotFoundException {
JobConf job = new JobConf(TEST_UTIL.getConfiguration());
job.setJobName(jobName);
job.setMapperClass(Mapper.class);
job.setReducerClass(Reducer.class);
TableMapReduceUtil.initMultiTableSnapshotMapperJob(getSnapshotScanMapping(scans), Mapper.class,
ImmutableBytesWritable.class, ImmutableBytesWritable.class, job, true, restoreDir);
TableMapReduceUtil.addDependencyJars(job);
job.setReducerClass(Reducer.class);
job.setNumReduceTasks(1); // one to get final "first" and "last" key
FileOutputFormat.setOutputPath(job, new Path(job.getJobName()));
LOG.info("Started " + job.getJobName());
RunningJob runningJob = JobClient.runJob(job);
runningJob.waitForCompletion();
assertTrue(runningJob.isSuccessful());
LOG.info("After map/reduce completion - job " + jobName);
}
示例10: run
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
public int run(String[] argv) throws IOException {
if (argv.length < 2) {
System.out.println("ExternalMapReduce <input> <output>");
return -1;
}
Path outDir = new Path(argv[1]);
Path input = new Path(argv[0]);
JobConf testConf = new JobConf(getConf(), ExternalMapReduce.class);
//try to load a class from libjar
try {
testConf.getClassByName("testjar.ClassWordCount");
} catch (ClassNotFoundException e) {
System.out.println("Could not find class from libjar");
return -1;
}
testConf.setJobName("external job");
FileInputFormat.setInputPaths(testConf, input);
FileOutputFormat.setOutputPath(testConf, outDir);
testConf.setMapperClass(MapClass.class);
testConf.setReducerClass(Reduce.class);
testConf.setNumReduceTasks(1);
JobClient.runJob(testConf);
return 0;
}
示例11: runJobFail
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
public static void runJobFail(JobConf conf, Path inDir, Path outDir)
throws IOException, InterruptedException {
conf.setJobName("test-job-fail");
conf.setMapperClass(FailMapper.class);
conf.setJarByClass(FailMapper.class);
conf.setReducerClass(IdentityReducer.class);
conf.setMaxMapAttempts(1);
boolean success = runJob(conf, inDir, outDir, 1, 0);
Assert.assertFalse("Job expected to fail succeeded", success);
}
示例12: runJobSucceed
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
public static void runJobSucceed(JobConf conf, Path inDir, Path outDir)
throws IOException, InterruptedException {
conf.setJobName("test-job-succeed");
conf.setMapperClass(IdentityMapper.class);
//conf.setJar(new File(MiniMRYarnCluster.APPJAR).getAbsolutePath());
conf.setReducerClass(IdentityReducer.class);
boolean success = runJob(conf, inDir, outDir, 1 , 1);
Assert.assertTrue("Job expected to succeed failed", success);
}
示例13: testCombinerShouldUpdateTheReporter
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
@Test
public void testCombinerShouldUpdateTheReporter() throws Exception {
JobConf conf = new JobConf(mrCluster.getConfig());
int numMaps = 5;
int numReds = 2;
Path in = new Path(mrCluster.getTestWorkDir().getAbsolutePath(),
"testCombinerShouldUpdateTheReporter-in");
Path out = new Path(mrCluster.getTestWorkDir().getAbsolutePath(),
"testCombinerShouldUpdateTheReporter-out");
createInputOutPutFolder(in, out, numMaps);
conf.setJobName("test-job-with-combiner");
conf.setMapperClass(IdentityMapper.class);
conf.setCombinerClass(MyCombinerToCheckReporter.class);
//conf.setJarByClass(MyCombinerToCheckReporter.class);
conf.setReducerClass(IdentityReducer.class);
DistributedCache.addFileToClassPath(TestMRJobs.APP_JAR, conf);
conf.setOutputCommitter(CustomOutputCommitter.class);
conf.setInputFormat(TextInputFormat.class);
conf.setOutputKeyClass(LongWritable.class);
conf.setOutputValueClass(Text.class);
FileInputFormat.setInputPaths(conf, in);
FileOutputFormat.setOutputPath(conf, out);
conf.setNumMapTasks(numMaps);
conf.setNumReduceTasks(numReds);
runJob(conf);
}
示例14: addInputPath
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
/**
* Add a {@link Path} with a custom {@link InputFormat} and
* {@link Mapper} to the list of inputs for the map-reduce job.
*
* @param conf The configuration of the job
* @param path {@link Path} to be added to the list of inputs for the job
* @param inputFormatClass {@link InputFormat} class to use for this path
* @param mapperClass {@link Mapper} class to use for this path
*/
public static void addInputPath(JobConf conf, Path path,
Class<? extends InputFormat> inputFormatClass,
Class<? extends Mapper> mapperClass) {
addInputPath(conf, path, inputFormatClass);
String mapperMapping = path.toString() + ";" + mapperClass.getName();
String mappers = conf.get("mapreduce.input.multipleinputs.dir.mappers");
conf.set("mapreduce.input.multipleinputs.dir.mappers", mappers == null ? mapperMapping
: mappers + "," + mapperMapping);
conf.setMapperClass(DelegatingMapper.class);
}
示例15: initTableMapJob
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
/**
* Use this before submitting a TableMap job. It will
* appropriately set up the JobConf.
*
* @param table The table name to read from.
* @param columns The columns to scan.
* @param mapper The mapper class to use.
* @param outputKeyClass The class of the output key.
* @param outputValueClass The class of the output value.
* @param job The current job configuration to adjust.
* @param addDependencyJars upload HBase jars and jars for any of the configured
* job classes via the distributed cache (tmpjars).
*/
public static void initTableMapJob(String table, String columns,
Class<? extends TableMap> mapper,
Class<?> outputKeyClass,
Class<?> outputValueClass, JobConf job, boolean addDependencyJars,
Class<? extends InputFormat> inputFormat) {
job.setInputFormat(inputFormat);
job.setMapOutputValueClass(outputValueClass);
job.setMapOutputKeyClass(outputKeyClass);
job.setMapperClass(mapper);
job.setStrings("io.serializations", job.get("io.serializations"),
MutationSerialization.class.getName(), ResultSerialization.class.getName());
FileInputFormat.addInputPaths(job, table);
job.set(TableInputFormat.COLUMN_LIST, columns);
if (addDependencyJars) {
try {
addDependencyJars(job);
} catch (IOException e) {
e.printStackTrace();
}
}
try {
initCredentials(job);
} catch (IOException ioe) {
// just spit out the stack trace? really?
ioe.printStackTrace();
}
}