网格计算

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Java

JythonAbacus.py：源码内容

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from org.apache.hadoop.fs import Path
from org.apache.hadoop.io import *
from org.apache.hadoop.mapred import *
from org.apache.hadoop.abacus import *
from java.util import *;
import sys
class AbacusMapper(ValueAggregatorMapper):
    def map(self, key, value, output, reporter):
        ValueAggregatorMapper.map(self, key, value, output, reporter);
class AbacusReducer(ValueAggregatorReducer):
    def reduce(self, key, values, output, reporter):
        ValueAggregatorReducer.reduce(self, key, values, output, reporter);
class AbacusCombiner(ValueAggregatorCombiner):
    def reduce(self, key, values, output, reporter):
        ValueAggregatorCombiner.reduce(self, key, values, output, reporter);
def printUsage(code):
    print "Abacus <input> <output> <numOfReducers> <inputformat> <specfile>"
    sys.exit(code)
def main(args):
    if len(args) < 6:
        printUsage(1);
    inDir = args[1];
    outDir = args[2];
    numOfReducers = int(args[3]);
    theInputFormat = args[4];
    specFile = args[5];
                                        
    print "numOfReducers: ", numOfReducers, "theInputFormat: ", theInputFormat, "specFile: ", specFile
    conf = JobConf(AbacusMapper);
    conf.setJobName("recordcount");
    conf.addDefaultResource(Path(specFile));
 
    if theInputFormat=="textinputformat":
        conf.setInputFormat(TextInputFormat);
    else:
        conf.setInputFormat(SequenceFileInputFormat);
    conf.setOutputFormat(TextOutputFormat);
    conf.setMapOutputKeyClass(Text);
    conf.setMapOutputValueClass(Text);
    conf.setOutputKeyClass(Text);
    conf.setOutputValueClass(Text);
    conf.setNumMapTasks(1);
    conf.setNumReduceTasks(numOfReducers);
    conf.setMapperClass(AbacusMapper);        
    conf.setCombinerClass(AbacusCombiner);
    conf.setReducerClass(AbacusReducer);
    conf.setInputPath(Path(args[1]))
    conf.setOutputPath(Path(args[2]))
    JobClient.runJob(conf);
if __name__ == "__main__":
    main(sys.argv)

						