/** Closes and deletes the input files. */
private void close() {
str.close();
dat.close();
files.delete();
filed.delete();
sizes.delete();
}
/**
* Returns a list of all databases.
*
* @param ctx database context
* @return list of databases
*/
public static StringList list(final Context ctx) {
final StringList db = new StringList();
for (final IOFile f : ctx.mprop.dbpath().children()) {
final String name = f.name();
if (f.isDir() && !name.startsWith(".")) db.add(name);
}
return db.sort(false);
}
@Override
public void startUpdate(final MainOptions opts) throws IOException {
if (!table.lock(true)) throw new BaseXException(Text.DB_PINNED_X, meta.name);
if (opts.get(MainOptions.AUTOFLUSH)) {
final IOFile uf = meta.updateFile();
if (uf.exists()) throw new BaseXException(Text.DB_UPDATED_X, meta.name);
if (!uf.touch()) throw Util.notExpected("%: could not create lock file.", meta.name);
}
}
/**
* Checks if the table of the specified database is locked.
*
* @param db name of database
* @param ctx database context
* @return result of check
*/
public static boolean locked(final String db, final Context ctx) {
final IOFile table = MetaData.file(ctx.globalopts.dbpath(db), DATATBL);
if (!table.exists()) return false;
try (final RandomAccessFile file = new RandomAccessFile(table.file(), "rw")) {
return file.getChannel().tryLock() == null;
} catch (final ClosedChannelException ex) {
return false;
} catch (final OverlappingFileLockException | IOException ex) {
return true;
}
}
@Override
public synchronized void finishUpdate(final MainOptions opts) {
// remove updating file
final boolean auto = opts.get(MainOptions.AUTOFLUSH);
if (auto) {
final IOFile uf = meta.updateFile();
if (!uf.exists()) throw Util.notExpected("%: lock file does not exist.", meta.name);
if (!uf.delete()) throw Util.notExpected("%: could not delete lock file.", meta.name);
}
// db:optimize(..., true) will close the database before this function is called
if (!closed) {
flush(auto);
if (!table.lock(false)) throw Util.notExpected("Database '%': could not unlock.", meta.name);
}
}
/**
* Lists all databases.
*
* @return success flag
* @throws IOException I/O exception
*/
private boolean list() throws IOException {
final Table table = new Table();
table.description = DATABASES_X;
final boolean create = context.user.has(Perm.CREATE);
table.header.add(T_NAME);
table.header.add(RESOURCES);
table.header.add(SIZE);
if (create) table.header.add(INPUT_PATH);
for (final String name : context.databases.listDBs()) {
String file = null;
long size = 0;
int docs = 0;
final MetaData meta = new MetaData(name, context);
try {
meta.read();
size = meta.dbsize();
docs = meta.ndocs;
if (context.perm(Perm.READ, meta)) file = meta.original;
} catch (final IOException ex) {
file = ERROR;
}
// count number of raw files
final IOFile dir = new IOFile(mprop.dbpath(name), M_RAW);
final int bin = dir.descendants().size();
// create entry
if (file != null) {
final TokenList tl = new TokenList(4);
tl.add(name);
tl.add(docs + bin);
tl.add(size);
if (create) tl.add(file);
table.contents.add(tl);
}
}
out.println(table.sort().finish());
return true;
}