private static void checkNotChanged(
String what, @Nullable Object existing, @Nullable Object test) {
ValidationException.check(
(existing == test) || (existing != null && existing.equals(test)),
"Dataset %s is not compatible with existing: %s != %s",
what,
String.valueOf(existing),
String.valueOf(test));
}
@Override
public final void initialize() {
Preconditions.checkState(
state.equals(ReaderWriterState.NEW), "Unable to open a writer from state:%s", state);
ValidationException.check(
isSupportedFormat(descriptor), "Not a supported format: %s", descriptor.getFormat());
// ensure the directory exists
try {
fs.mkdirs(directory);
} catch (RuntimeException e) {
this.state = ReaderWriterState.ERROR;
throw new DatasetOperationException(e, "Failed to create path %s", directory);
} catch (IOException ex) {
this.state = ReaderWriterState.ERROR;
throw new DatasetIOException("Failed to create path " + directory, ex);
}
// initialize paths
try {
this.finalPath = new Path(directory, uniqueFilename(descriptor.getFormat()));
this.tempPath = tempFilename(finalPath);
} catch (RuntimeException e) {
this.state = ReaderWriterState.ERROR;
throw new DatasetOperationException(e, "Failed to initialize file paths under %s", directory);
}
try {
this.appender = newAppender(tempPath);
appender.open();
} catch (RuntimeException e) {
this.state = ReaderWriterState.ERROR;
throw new DatasetOperationException(e, "Failed to open appender %s", appender);
} catch (IOException e) {
this.state = ReaderWriterState.ERROR;
throw new DatasetIOException("Failed to open appender " + appender, e);
}
this.count = 0;
LOG.info("Opened output appender {} for {}", appender, finalPath);
this.state = ReaderWriterState.OPEN;
}
@Override
public void initialize() {
Preconditions.checkState(
state.equals(ReaderWriterState.NEW), "Unable to open a writer from state:%s", state);
DatasetDescriptor descriptor = view.getDataset().getDescriptor();
ValidationException.check(
FileSystemWriter.isSupportedFormat(descriptor),
"Not a supported format: %s",
descriptor.getFormat());
LOG.debug("Opening partitioned dataset writer w/strategy:{}", partitionStrategy);
cachedWriters =
CacheBuilder.newBuilder()
.maximumSize(maxWriters)
.removalListener(new DatasetWriterCloser<E>())
.build(createCacheLoader());
state = ReaderWriterState.OPEN;
}