本文整理匯總了Java中org.apache.hadoop.mapred.JobConf.setMapRunnerClass方法的典型用法代碼示例。如果您正苦於以下問題：Java JobConf.setMapRunnerClass方法的具體用法？Java JobConf.setMapRunnerClass怎麽用？Java JobConf.setMapRunnerClass使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.hadoop.mapred.JobConf的用法示例。
在下文中一共展示了JobConf.setMapRunnerClass方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: setupPipesJob
import org.apache.hadoop.mapred.JobConf; //導入方法依賴的package包/類
private static void setupPipesJob(JobConf conf) throws IOException {
// default map output types to Text
if (!getIsJavaMapper(conf)) {
conf.setMapRunnerClass(PipesMapRunner.class);
// Save the user's partitioner and hook in our's.
setJavaPartitioner(conf, conf.getPartitionerClass());
conf.setPartitionerClass(PipesPartitioner.class);
}
if (!getIsJavaReducer(conf)) {
conf.setReducerClass(PipesReducer.class);
if (!getIsJavaRecordWriter(conf)) {
conf.setOutputFormat(NullOutputFormat.class);
}
}
String textClassname = Text.class.getName();
setIfUnset(conf, MRJobConfig.MAP_OUTPUT_KEY_CLASS, textClassname);
setIfUnset(conf, MRJobConfig.MAP_OUTPUT_VALUE_CLASS, textClassname);
setIfUnset(conf, MRJobConfig.OUTPUT_KEY_CLASS, textClassname);
setIfUnset(conf, MRJobConfig.OUTPUT_VALUE_CLASS, textClassname);
// Use PipesNonJavaInputFormat if necessary to handle progress reporting
// from C++ RecordReaders ...
if (!getIsJavaRecordReader(conf) && !getIsJavaMapper(conf)) {
conf.setClass(Submitter.INPUT_FORMAT,
conf.getInputFormat().getClass(), InputFormat.class);
conf.setInputFormat(PipesNonJavaInputFormat.class);
}
String exec = getExecutable(conf);
if (exec == null) {
throw new IllegalArgumentException("No application program defined.");
}
// add default debug script only when executable is expressed as
// <path>#<executable>
if (exec.contains("#")) {
// set default gdb commands for map and reduce task
String defScript = "$HADOOP_PREFIX/src/c++/pipes/debug/pipes-default-script";
setIfUnset(conf, MRJobConfig.MAP_DEBUG_SCRIPT,defScript);
setIfUnset(conf, MRJobConfig.REDUCE_DEBUG_SCRIPT,defScript);
}
URI[] fileCache = DistributedCache.getCacheFiles(conf);
if (fileCache == null) {
fileCache = new URI[1];
} else {
URI[] tmp = new URI[fileCache.length+1];
System.arraycopy(fileCache, 0, tmp, 1, fileCache.length);
fileCache = tmp;
}
try {
fileCache[0] = new URI(exec);
} catch (URISyntaxException e) {
IOException ie = new IOException("Problem parsing execable URI " + exec);
ie.initCause(e);
throw ie;
}
DistributedCache.setCacheFiles(fileCache, conf);
}