本文整理汇总了Java中org.apache.hadoop.mapred.JobConf.setMapRunnerClass方法的典型用法代码示例。如果您正苦于以下问题：Java JobConf.setMapRunnerClass方法的具体用法？Java JobConf.setMapRunnerClass怎么用？Java JobConf.setMapRunnerClass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.setMapRunnerClass方法的1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: setupPipesJob
import org.apache.hadoop.mapred.JobConf; //导入方法依赖的package包/类
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);
}