synchronized TxLog getTxLog() throws IOException {
if (txLog.getRecordCount() > maxTxLogRecordCount) {
if (txLog.getName().endsWith(txLog1FileName)) {
txLog.switchToLogFile(txLogDir + separator + txLog2FileName);
changeActiveLog(txLog2FileName);
} else if (txLog.getName().endsWith(txLog2FileName)) {
txLog.switchToLogFile(txLogDir + separator + txLog1FileName);
changeActiveLog(txLog1FileName);
} else {
setTmNotOk(
new Exception(
"Unknown active tx log file[" + txLog.getName() + "], unable to switch."));
log.severe("Unknown active tx log file[" + txLog.getName() + "], unable to switch.");
final IOException ex =
new IOException(
"Unknown txLogFile["
+ txLog.getName()
+ "] not equals to either ["
+ txLog1FileName
+ "] or ["
+ txLog2FileName
+ "]");
throw logAndReturn("TM error accessing log file", ex);
}
}
return txLog;
}
void doCommit() throws XAException, SystemException {
boolean onePhase = isOnePhase();
boolean readOnly = true;
if (!onePhase) {
// prepare
status = Status.STATUS_PREPARING;
LinkedList<Xid> preparedXids = new LinkedList<Xid>();
Iterator<ResourceElement> itr = resourceList.iterator();
while (itr.hasNext()) {
ResourceElement re = itr.next();
if (!preparedXids.contains(re.getXid())) {
preparedXids.add(re.getXid());
int vote = re.getResource().prepare(re.getXid());
if (vote == XAResource.XA_OK) {
readOnly = false;
} else if (vote == XAResource.XA_RDONLY) {
re.setStatus(RS_READONLY);
} else {
// rollback tx
status = Status.STATUS_MARKED_ROLLBACK;
return;
}
} else {
// set it to readonly, only need to commit once
re.setStatus(RS_READONLY);
}
}
status = Status.STATUS_PREPARED;
}
// commit
if (!onePhase && readOnly) {
status = Status.STATUS_COMMITTED;
return;
}
if (!onePhase) {
try {
txManager.getTxLog().markAsCommitting(getGlobalId());
} catch (IOException e) {
log.log(Level.SEVERE, "Error writing transaction log", e);
txManager.setTmNotOk();
throw Exceptions.withCause(
new SystemException("TM encountered a problem, " + " error writing transaction log"),
e);
}
}
status = Status.STATUS_COMMITTING;
Iterator<ResourceElement> itr = resourceList.iterator();
while (itr.hasNext()) {
ResourceElement re = itr.next();
if (re.getStatus() != RS_READONLY) {
re.getResource().commit(re.getXid(), onePhase);
}
}
status = Status.STATUS_COMMITTED;
}
private void rollbackCommit(Thread thread, TransactionImpl tx)
throws HeuristicMixedException, RollbackException, SystemException {
try {
tx.doRollback();
} catch (XAException e) {
log.log(
Level.SEVERE,
"Unable to rollback marked transaction. "
+ "Some resources may be commited others not. "
+ "Neo4j kernel should be SHUTDOWN for "
+ "resource maintance and transaction recovery ---->",
e);
setTmNotOk(e);
throw logAndReturn(
"TM error tx rollback commit",
Exceptions.withCause(
new HeuristicMixedException(
"Unable to rollback " + " ---> error code for rollback: " + e.errorCode),
e));
}
tx.doAfterCompletion();
txThreadMap.remove(thread);
try {
if (tx.isGlobalStartRecordWritten()) {
getTxLog().txDone(tx.getGlobalId());
}
} catch (IOException e) {
log.log(Level.SEVERE, "Error writing transaction log", e);
setTmNotOk(e);
throw logAndReturn(
"TM error tx rollback commit",
Exceptions.withCause(
new SystemException("TM encountered a problem, " + " error writing transaction log"),
e));
}
tx.setStatus(Status.STATUS_NO_TRANSACTION);
RollbackException rollbackException =
new RollbackException("Failed to commit, transaction rolledback");
ExceptionCauseSetter.setCause(rollbackException, tx.getRollbackCause());
throw rollbackException;
}
// called when a resource gets enlisted
void writeStartRecord(byte globalId[]) throws SystemException {
try {
getTxLog().txStart(globalId);
} catch (IOException e) {
log.log(Level.SEVERE, "Error writing transaction log", e);
setTmNotOk(e);
throw logAndReturn(
"TM error write start record",
Exceptions.withCause(
new SystemException("TM encountered a problem, " + " error writing transaction log,"),
e));
}
}
public synchronized boolean enlistResource(XAResource xaRes)
throws RollbackException, IllegalStateException, SystemException {
if (xaRes == null) {
throw new IllegalArgumentException("Null xa resource");
}
if (status == Status.STATUS_ACTIVE || status == Status.STATUS_PREPARING) {
try {
if (resourceList.size() == 0) {
if (!globalStartRecordWritten) {
txManager.writeStartRecord(globalId);
globalStartRecordWritten = true;
}
//
byte branchId[] = txManager.getBranchId(xaRes);
Xid xid = new XidImpl(globalId, branchId);
resourceList.add(new ResourceElement(xid, xaRes));
xaRes.start(xid, XAResource.TMNOFLAGS);
try {
txManager.getTxLog().addBranch(globalId, branchId);
} catch (IOException e) {
log.log(Level.SEVERE, "Error writing transaction log", e);
txManager.setTmNotOk();
throw Exceptions.withCause(
new SystemException(
"TM encountered a problem, " + " error writing transaction log"),
e);
}
return true;
}
Xid sameRmXid = null;
Iterator<ResourceElement> itr = resourceList.iterator();
while (itr.hasNext()) {
ResourceElement re = itr.next();
if (sameRmXid == null && re.getResource().isSameRM(xaRes)) {
sameRmXid = re.getXid();
}
if (xaRes == re.getResource()) {
if (re.getStatus() == RS_SUSPENDED) {
xaRes.start(re.getXid(), XAResource.TMRESUME);
} else {
// either enlisted or delisted
// is TMJOIN correct then?
xaRes.start(re.getXid(), XAResource.TMJOIN);
}
re.setStatus(RS_ENLISTED);
return true;
}
}
if (sameRmXid != null) // should we join?
{
addResourceToList(sameRmXid, xaRes);
xaRes.start(sameRmXid, XAResource.TMJOIN);
} else
// new branch
{
// ResourceElement re = resourceList.getFirst();
byte branchId[] = txManager.getBranchId(xaRes);
Xid xid = new XidImpl(globalId, branchId);
addResourceToList(xid, xaRes);
xaRes.start(xid, XAResource.TMNOFLAGS);
try {
txManager.getTxLog().addBranch(globalId, branchId);
} catch (IOException e) {
log.log(Level.SEVERE, "Error writing transaction log", e);
txManager.setTmNotOk();
throw Exceptions.withCause(
new SystemException(
"TM encountered a problem, " + " error writing transaction log"),
e);
}
}
return true;
} catch (XAException e) {
log.log(Level.SEVERE, "Unable to enlist resource[" + xaRes + "]", e);
status = Status.STATUS_MARKED_ROLLBACK;
return false;
}
} else if (status == Status.STATUS_ROLLING_BACK
|| status == Status.STATUS_ROLLEDBACK
|| status == Status.STATUS_MARKED_ROLLBACK) {
throw new RollbackException("Tx status is: " + txManager.getTxStatusAsString(status));
}
throw new IllegalStateException("Tx status is: " + txManager.getTxStatusAsString(status));
}
public void rollback() throws IllegalStateException, SystemException {
assertTmOk("tx rollback");
Thread thread = Thread.currentThread();
TransactionImpl tx = txThreadMap.get(thread);
if (tx == null) {
throw new IllegalStateException("Not in transaction");
}
boolean hasAnyLocks = false;
try {
hasAnyLocks = finishHook.hasAnyLocks(tx);
if (tx.getStatus() == Status.STATUS_ACTIVE
|| tx.getStatus() == Status.STATUS_MARKED_ROLLBACK
|| tx.getStatus() == Status.STATUS_PREPARING) {
tx.setStatus(Status.STATUS_MARKED_ROLLBACK);
tx.doBeforeCompletion();
// delist resources?
try {
rolledBackTxCount.incrementAndGet();
tx.doRollback();
} catch (XAException e) {
log.log(
Level.SEVERE,
"Unable to rollback marked or active transaction. "
+ "Some resources may be commited others not. "
+ "Neo4j kernel should be SHUTDOWN for "
+ "resource maintance and transaction recovery ---->",
e);
setTmNotOk(e);
throw logAndReturn(
"TM error tx rollback",
Exceptions.withCause(
new SystemException(
"Unable to rollback " + " ---> error code for rollback: " + e.errorCode),
e));
}
tx.doAfterCompletion();
txThreadMap.remove(thread);
try {
if (tx.isGlobalStartRecordWritten()) {
getTxLog().txDone(tx.getGlobalId());
}
} catch (IOException e) {
log.log(Level.SEVERE, "Error writing transaction log", e);
setTmNotOk(e);
throw logAndReturn(
"TM error tx rollback",
Exceptions.withCause(
new SystemException(
"TM encountered a problem, " + " error writing transaction log"),
e));
}
tx.setStatus(Status.STATUS_NO_TRANSACTION);
} else {
throw new IllegalStateException("Tx status is: " + getTxStatusAsString(tx.getStatus()));
}
} finally {
if (hasAnyLocks) {
finishHook.finishTransaction(tx.getEventIdentifier(), false);
}
}
}
private void commit(Thread thread, TransactionImpl tx)
throws SystemException, HeuristicMixedException, HeuristicRollbackException {
// mark as commit in log done TxImpl.doCommit()
Throwable commitFailureCause = null;
int xaErrorCode = -1;
if (tx.getResourceCount() == 0) {
tx.setStatus(Status.STATUS_COMMITTED);
} else {
try {
tx.doCommit();
} catch (XAException e) {
xaErrorCode = e.errorCode;
log.log(
Level.SEVERE,
"Commit failed, status="
+ getTxStatusAsString(tx.getStatus())
+ ", errorCode="
+ xaErrorCode,
e);
if (tx.getStatus() == Status.STATUS_COMMITTED) {
// this should never be
setTmNotOk(e);
throw logAndReturn(
"TM error tx commit",
new TransactionFailureException(
"commit threw exception but status is committed?", e));
}
} catch (Throwable t) {
log.log(Level.SEVERE, "Commit failed", t);
commitFailureCause = t;
}
}
if (tx.getStatus() != Status.STATUS_COMMITTED) {
try {
tx.doRollback();
} catch (Throwable e) {
log.log(
Level.SEVERE,
"Unable to rollback transaction. "
+ "Some resources may be commited others not. "
+ "Neo4j kernel should be SHUTDOWN for "
+ "resource maintance and transaction recovery ---->",
e);
setTmNotOk(e);
String commitError;
if (commitFailureCause != null) {
commitError = "error in commit: " + commitFailureCause;
} else {
commitError = "error code in commit: " + xaErrorCode;
}
String rollbackErrorCode = "Uknown error code";
if (e instanceof XAException) {
rollbackErrorCode = Integer.toString(((XAException) e).errorCode);
}
throw logAndReturn(
"TM error tx commit",
Exceptions.withCause(
new HeuristicMixedException(
"Unable to rollback ---> "
+ commitError
+ " ---> error code for rollback: "
+ rollbackErrorCode),
e));
}
tx.doAfterCompletion();
txThreadMap.remove(thread);
try {
if (tx.isGlobalStartRecordWritten()) {
getTxLog().txDone(tx.getGlobalId());
}
} catch (IOException e) {
log.log(Level.SEVERE, "Error writing transaction log", e);
setTmNotOk(e);
throw logAndReturn(
"TM error tx commit",
Exceptions.withCause(
new SystemException(
"TM encountered a problem, " + " error writing transaction log"),
e));
}
tx.setStatus(Status.STATUS_NO_TRANSACTION);
if (commitFailureCause == null) {
throw logAndReturn(
"TM error tx commit",
new HeuristicRollbackException(
"Failed to commit, transaction rolledback ---> "
+ "error code was: "
+ xaErrorCode));
} else {
throw logAndReturn(
"TM error tx commit",
Exceptions.withCause(
new HeuristicRollbackException(
"Failed to commit, transaction rolledback ---> " + commitFailureCause),
commitFailureCause));
}
}
tx.doAfterCompletion();
txThreadMap.remove(thread);
try {
if (tx.isGlobalStartRecordWritten()) {
getTxLog().txDone(tx.getGlobalId());
}
} catch (IOException e) {
log.log(Level.SEVERE, "Error writing transaction log", e);
setTmNotOk(e);
throw logAndReturn(
"TM error tx commit",
Exceptions.withCause(
new SystemException("TM encountered a problem, " + " error writing transaction log"),
e));
}
tx.setStatus(Status.STATUS_NO_TRANSACTION);
}
