public static void checkSanity() {
long t = System.currentTimeMillis();
try {
r.lock();
final int fileLength = (int) getRecords().length();
assert fileLength % RECORD_SIZE == 0;
int recordCount = fileLength / RECORD_SIZE;
IntArrayList usedAttributeRecordIds = new IntArrayList();
IntArrayList validAttributeIds = new IntArrayList();
for (int id = 2; id < recordCount; id++) {
int flags = getFlags(id);
LOG.assertTrue(
(flags & ~ALL_VALID_FLAGS) == 0,
"Invalid flags: 0x" + Integer.toHexString(flags) + ", id: " + id);
if ((flags & FREE_RECORD_FLAG) != 0) {
LOG.assertTrue(
DbConnection.myFreeRecords.contains(id),
"Record, marked free, not in free list: " + id);
} else {
LOG.assertTrue(
!DbConnection.myFreeRecords.contains(id),
"Record, not marked free, in free list: " + id);
checkRecordSanity(id, recordCount, usedAttributeRecordIds, validAttributeIds);
}
}
} finally {
r.unlock();
}
t = System.currentTimeMillis() - t;
LOG.info("Sanity check took " + t + " ms");
}
public static Pair<String[], int[]> listAll(int parentId) {
try {
r.lock();
try {
final DataInputStream input = readAttribute(parentId, CHILDREN_ATT);
if (input == null)
return Pair.create(ArrayUtil.EMPTY_STRING_ARRAY, ArrayUtil.EMPTY_INT_ARRAY);
final int count = DataInputOutputUtil.readINT(input);
final int[] ids = ArrayUtil.newIntArray(count);
final String[] names = ArrayUtil.newStringArray(count);
for (int i = 0; i < count; i++) {
int id = DataInputOutputUtil.readINT(input);
id = id >= 0 ? id + parentId : -id;
ids[i] = id;
names[i] = getName(id);
}
input.close();
return Pair.create(names, ids);
} finally {
r.unlock();
}
} catch (Throwable e) {
throw DbConnection.handleError(e);
}
}
public static long getCreationTimestamp() {
try {
r.lock();
return DbConnection.getTimestamp();
} finally {
r.unlock();
}
}
public static int getModCount() {
try {
r.lock();
return getRecords().getInt(HEADER_GLOBAL_MOD_COUNT_OFFSET);
} finally {
r.unlock();
}
}
public static int getFlags(int id) {
try {
r.lock();
return getRecordInt(id, FLAGS_OFFSET);
} finally {
r.unlock();
}
}
public static long getLength(int id) {
try {
r.lock();
return getRecords().getLong(getOffset(id, LENGTH_OFFSET));
} finally {
r.unlock();
}
}
public static long getTimestamp(int id) {
try {
r.lock();
return getRecords().getLong(getOffset(id, TIMESTAMP_OFFSET));
} finally {
r.unlock();
}
}
public static int getModCount(int id) {
try {
r.lock();
return getRecordInt(id, MOD_COUNT_OFFSET);
} finally {
r.unlock();
}
}
public static void setTimestamp(int id, long value) {
try {
w.lock();
incModCount(id);
getRecords().putLong(getOffset(id, TIMESTAMP_OFFSET), value);
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}
public static void setLength(int id, long len) {
try {
w.lock();
incModCount(id);
getRecords().putLong(getOffset(id, LENGTH_OFFSET), len);
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}
public static void setName(int id, String name) {
try {
w.lock();
incModCount(id);
putRecordInt(id, NAME_OFFSET, getNames().enumerate(name));
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}
public static void deleteRecordRecursively(int id) {
try {
w.lock();
incModCount(id);
doDeleteRecursively(id);
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}
public static int acquireFileContent(int fileId) {
try {
w.lock();
int record = getContentRecordId(fileId);
if (record > 0) getContentStorage().acquireRecord(record);
return record;
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}
public static boolean wereChildrenAccessed(int id) {
try {
r.lock();
try {
return findAttributePage(id, CHILDREN_ATT, false) != 0;
} finally {
r.unlock();
}
} catch (Throwable e) {
throw DbConnection.handleError(e);
}
}
public void writeBytes(ByteSequence bytes, int fileId) throws IOException {
final int page;
try {
w.lock();
incModCount(fileId);
page = findOrCreatePage();
} finally {
w.unlock();
}
getStorage().writeBytes(page, bytes, myFixedSize);
}
public static void dispose() {
try {
w.lock();
DbConnection.force();
DbConnection.closeFiles();
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
ourIsDisposed = true;
w.unlock();
}
}
public static int getContentId(int fileId) {
try {
r.lock();
try {
return getContentRecordId(fileId);
} finally {
r.unlock();
}
} catch (Throwable e) {
throw DbConnection.handleError(e);
}
}
public static void connect() {
try {
w.lock();
if (!ourInitialized) {
init();
setupFlushing();
ourInitialized = true;
}
} finally {
w.unlock();
}
}
public static String getName(int id) {
try {
r.lock();
try {
final int nameId = getRecordInt(id, NAME_OFFSET);
return nameId != 0 ? getNames().valueOf(nameId) : "";
} finally {
r.unlock();
}
} catch (Throwable e) {
throw DbConnection.handleError(e);
}
}
public static void setFlags(int id, int flags, final boolean markAsChange) {
try {
w.lock();
if (markAsChange) {
incModCount(id);
}
putRecordInt(id, FLAGS_OFFSET, flags);
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}
public static int findRootRecord(String rootUrl) throws IOException {
try {
w.lock();
DbConnection.markDirty();
final int root = getNames().enumerate(rootUrl);
final DataInputStream input = readAttribute(1, CHILDREN_ATT);
int[] names = ArrayUtil.EMPTY_INT_ARRAY;
int[] ids = ArrayUtil.EMPTY_INT_ARRAY;
if (input != null) {
try {
final int count = DataInputOutputUtil.readINT(input);
names = ArrayUtil.newIntArray(count);
ids = ArrayUtil.newIntArray(count);
for (int i = 0; i < count; i++) {
final int name = DataInputOutputUtil.readINT(input);
final int id = DataInputOutputUtil.readINT(input);
if (name == root) {
return id;
}
names[i] = name;
ids[i] = id;
}
} finally {
input.close();
}
}
final DataOutputStream output = writeAttribute(1, CHILDREN_ATT, false);
int id;
try {
id = createRecord();
DataInputOutputUtil.writeINT(output, names.length + 1);
for (int i = 0; i < names.length; i++) {
DataInputOutputUtil.writeINT(output, names[i]);
DataInputOutputUtil.writeINT(output, ids[i]);
}
DataInputOutputUtil.writeINT(output, root);
DataInputOutputUtil.writeINT(output, id);
} finally {
output.close();
}
return id;
} finally {
w.unlock();
}
}
private static void deleteRecord(final int id) {
try {
w.lock();
DbConnection.markDirty();
deleteContentAndAttributes(id);
DbConnection.cleanRecord(id);
addToFreeRecordsList(id);
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}
public static void setParent(int id, int parent) {
if (id == parent) {
LOG.error("Cyclic parent/child relations");
return;
}
try {
w.lock();
incModCount(id);
putRecordInt(id, PARENT_OFFSET, parent);
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}
@Nullable
public static DataInputStream readContent(int fileId) {
try {
int page;
try {
r.lock();
page = findContentPage(fileId, false);
if (page == 0) return null;
} finally {
r.unlock();
}
return getContentStorage().readStream(page);
} catch (Throwable e) {
throw DbConnection.handleError(e);
}
}
public static void force() {
try {
w.lock();
if (myRecords != null) {
markClean();
}
if (myNames != null) {
myNames.force();
myAttributes.force();
myContents.force();
myRecords.force();
}
} finally {
w.unlock();
}
}
@Nullable
public static DataInputStream readAttribute(int fileId, String attId) {
try {
synchronized (attId) {
int page;
try {
r.lock();
page = findAttributePage(fileId, attId, false);
if (page == 0) return null;
} finally {
r.unlock();
}
return getAttributesStorage().readStream(page);
}
} catch (Throwable e) {
throw DbConnection.handleError(e);
}
}
public static int getParent(int id) {
try {
r.lock();
try {
final int parentId = getRecordInt(id, PARENT_OFFSET);
if (parentId == id) {
LOG.error("Cyclic parent child relations in the database. id = " + id);
return 0;
}
return parentId;
} finally {
r.unlock();
}
} catch (Throwable e) {
throw DbConnection.handleError(e);
}
}
public static void deleteRootRecord(int id) throws IOException {
try {
w.lock();
DbConnection.markDirty();
final DataInputStream input = readAttribute(1, CHILDREN_ATT);
assert input != null;
int count;
int[] names;
int[] ids;
try {
count = DataInputOutputUtil.readINT(input);
names = ArrayUtil.newIntArray(count);
ids = ArrayUtil.newIntArray(count);
for (int i = 0; i < count; i++) {
names[i] = DataInputOutputUtil.readINT(input);
ids[i] = DataInputOutputUtil.readINT(input);
}
} finally {
input.close();
}
final int index = ArrayUtil.find(ids, id);
assert index >= 0;
names = ArrayUtil.remove(names, index);
ids = ArrayUtil.remove(ids, index);
final DataOutputStream output = writeAttribute(1, CHILDREN_ATT, false);
try {
DataInputOutputUtil.writeINT(output, count - 1);
for (int i = 0; i < names.length; i++) {
DataInputOutputUtil.writeINT(output, names[i]);
DataInputOutputUtil.writeINT(output, ids[i]);
}
} finally {
output.close();
}
} finally {
w.unlock();
}
}
public static void flushSome() {
if (!isDirty() || HeavyProcessLatch.INSTANCE.isRunning()) return;
try {
w.lock();
if (myFlushingFuture == null) {
return; // avoid NPE when close has already taken place
}
myNames.force();
final boolean attribsFlushed = myAttributes.flushSome();
final boolean contentsFlushed = myContents.flushSome();
if (attribsFlushed && contentsFlushed) {
markClean();
myRecords.force();
}
} finally {
w.unlock();
}
}
public static void updateList(int id, @NotNull int[] children) {
try {
w.lock();
DbConnection.markDirty();
final DataOutputStream record = writeAttribute(id, CHILDREN_ATT, false);
DataInputOutputUtil.writeINT(record, children.length);
for (int child : children) {
if (child == id) {
LOG.error("Cyclic parent child relations");
} else {
child = child > id ? child - id : -child;
DataInputOutputUtil.writeINT(record, child);
}
}
record.close();
} catch (Throwable e) {
throw DbConnection.handleError(e);
} finally {
w.unlock();
}
}