public String toString() {
return "FSDir{"
+ "dir="
+ dir
+ ", children="
+ (children == null ? null : Arrays.asList(children))
+ "}";
}
public void configure(JobConf conf) {
try {
Path vInput;
FileSystem fs;
URI[] fvector;
nsize = conf.getInt("DIMENTION", 0);
sumVec = new double[nsize];
resVec = new double[nsize];
diaVec = new double[nsize];
Arrays.fill(sumVec, 0);
Arrays.fill(resVec, 0);
Arrays.fill(diaVec, 0);
fvector = DistributedCache.getCacheFiles(conf);
vInput = new Path(fvector[0].getPath());
fs = FileSystem.get(URI.create("hdfs://node17.cs.rochester.edu:9000"), conf);
FSDataInputStream fdis = fs.open(vInput);
String line;
while ((line = fdis.readLine()) != null) {
StringTokenizer tokenizer = new StringTokenizer(line);
int rowIdx = Integer.parseInt(tokenizer.nextToken());
int colIdx = Integer.parseInt(tokenizer.nextToken());
double matVar = Double.parseDouble(tokenizer.nextToken());
if (rowIdx == colIdx) {
diaVec[rowIdx] = matVar;
} else if (colIdx == nsize) {
resVec[rowIdx] = matVar;
} else {
sumVec[rowIdx] += matVar;
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
/** Find the corresponding meta data file from a given block file */
private static File findMetaFile(final File blockFile) throws IOException {
final String prefix = blockFile.getName() + "_";
final File parent = blockFile.getParentFile();
File[] matches =
parent.listFiles(
new FilenameFilter() {
public boolean accept(File dir, String name) {
return dir.equals(parent)
&& name.startsWith(prefix)
&& name.endsWith(METADATA_EXTENSION);
}
});
if (matches == null || matches.length == 0) {
throw new IOException("Meta file not found, blockFile=" + blockFile);
} else if (matches.length > 1) {
throw new IOException("Found more than one meta files: " + Arrays.asList(matches));
}
return matches[0];
}
