/**
* Dump a Log File (Map or Sequence) to stdout. Will read from HDFS or local file system.
*
* @param args - first argument is the file to print
*/
public static void main(String[] args) throws IOException {
Opts opts = new Opts();
opts.parseArgs(LogReader.class.getName(), args);
VolumeManager fs = VolumeManagerImpl.get();
Matcher rowMatcher = null;
KeyExtent ke = null;
Text row = null;
if (opts.files.isEmpty()) {
new JCommander(opts).usage();
return;
}
if (opts.row != null) row = new Text(opts.row);
if (opts.extent != null) {
String sa[] = opts.extent.split(";");
ke = new KeyExtent(new Text(sa[0]), new Text(sa[1]), new Text(sa[2]));
}
if (opts.regexp != null) {
Pattern pattern = Pattern.compile(opts.regexp);
rowMatcher = pattern.matcher("");
}
Set<Integer> tabletIds = new HashSet<Integer>();
for (String file : opts.files) {
Path path = new Path(file);
LogFileKey key = new LogFileKey();
LogFileValue value = new LogFileValue();
if (fs.isFile(path)) {
// read log entries from a simple hdfs file
DFSLoggerInputStreams streams =
DfsLogger.readHeaderAndReturnStream(fs, path, SiteConfiguration.getInstance());
DataInputStream input = streams.getDecryptingInputStream();
try {
while (true) {
try {
key.readFields(input);
value.readFields(input);
} catch (EOFException ex) {
break;
}
printLogEvent(key, value, row, rowMatcher, ke, tabletIds, opts.maxMutations);
}
} finally {
input.close();
}
} else {
// read the log entries sorted in a map file
MultiReader input = new MultiReader(fs, path);
while (input.next(key, value)) {
printLogEvent(key, value, row, rowMatcher, ke, tabletIds, opts.maxMutations);
}
}
}
}
public static void printLogEvent(
LogFileKey key,
LogFileValue value,
Text row,
Matcher rowMatcher,
KeyExtent ke,
Set<Integer> tabletIds,
int maxMutations) {
if (ke != null) {
if (key.event == LogEvents.DEFINE_TABLET) {
if (key.tablet.equals(ke)) {
tabletIds.add(key.tid);
} else {
return;
}
} else if (!tabletIds.contains(key.tid)) {
return;
}
}
if (row != null || rowMatcher != null) {
if (key.event == LogEvents.MUTATION || key.event == LogEvents.MANY_MUTATIONS) {
boolean found = false;
for (Mutation m : value.mutations) {
if (row != null && new Text(m.getRow()).equals(row)) {
found = true;
break;
}
if (rowMatcher != null) {
rowMatcher.reset(new String(m.getRow(), StandardCharsets.UTF_8));
if (rowMatcher.matches()) {
found = true;
break;
}
}
}
if (!found) return;
} else {
return;
}
}
System.out.println(key);
System.out.println(LogFileValue.format(value, maxMutations));
}
