public void writeChecksums() throws IOException {
String checksumName = CHECKSUMS_PREFIX + System.currentTimeMillis();
ImmutableMap<String, StoreFileMetaData> files = list();
synchronized (mutex) {
Map<String, String> checksums = new HashMap<String, String>();
for (StoreFileMetaData metaData : files.values()) {
if (metaData.checksum() != null) {
checksums.put(metaData.name(), metaData.checksum());
}
}
IndexOutput output = directory.createOutput(checksumName, IOContext.DEFAULT, true);
output.writeInt(0); // version
output.writeStringStringMap(checksums);
output.close();
}
for (StoreFileMetaData metaData : files.values()) {
if (metaData.name().startsWith(CHECKSUMS_PREFIX) && !checksumName.equals(metaData.name())) {
try {
directory.deleteFileChecksum(metaData.name());
} catch (Exception e) {
// ignore
}
}
}
}
/** Deletes the content of a shard store. Be careful calling this!. */
public void deleteContent() throws IOException {
ensureOpen();
String[] files = directory.listAll();
IOException lastException = null;
for (String file : files) {
if (isChecksum(file)) {
try {
directory.deleteFileChecksum(file);
} catch (IOException e) {
lastException = e;
}
} else {
try {
directory.deleteFile(file);
} catch (NoSuchFileException | FileNotFoundException e) {
// ignore
} catch (IOException e) {
lastException = e;
}
}
}
if (lastException != null) {
throw lastException;
}
}
private void closeInternal() {
synchronized (mutex) { // if we close the dir we need to make sure nobody writes checksums
try {
directory.closeInternal(); // don't call close here we throw an exception there!
} catch (IOException e) {
logger.debug("failed to close directory", e);
}
}
}
/** Creates a raw output, no checksum is computed, and no compression if enabled. */
public IndexOutput createOutputRaw(String name) throws IOException {
return directory.createOutput(name, IOContext.DEFAULT, true);
}
public void close() throws IOException {
directory.close();
}
public void fullDelete() throws IOException {
deleteContent();
for (Directory delegate : directory.delegates()) {
directoryService.fullDelete(delegate);
}
}
