Examples with DeleteTxn org.apache.zookeeper_voltpatches.txn.DeleteTxn used on opensource projects

Example 1 with DeleteTxn

use of org.apache.zookeeper_voltpatches.txn.DeleteTxn in project voltdb by VoltDB.

the class DataTree method processTxn.

public ProcessTxnResult processTxn(TxnHeader header, Record txn) {
    ProcessTxnResult rc = new ProcessTxnResult();
    String debug = "";
    try {
        rc.clientId = header.getClientId();
        rc.cxid = header.getCxid();
        rc.zxid = header.getZxid();
        rc.type = header.getType();
        rc.err = 0;
        if (rc.zxid > lastProcessedZxid) {
            lastProcessedZxid = rc.zxid;
        }
        switch(header.getType()) {
            case OpCode.create:
                CreateTxn createTxn = (CreateTxn) txn;
                debug = "Create transaction for " + createTxn.getPath();
                createNode(createTxn.getPath(), createTxn.getData(), createTxn.getAcl(), createTxn.getEphemeral() ? header.getClientId() : 0, header.getZxid(), header.getTime());
                rc.path = createTxn.getPath();
                break;
            case OpCode.delete:
                DeleteTxn deleteTxn = (DeleteTxn) txn;
                debug = "Delete transaction for " + deleteTxn.getPath();
                deleteNode(deleteTxn.getPath(), header.getZxid());
                break;
            case OpCode.setData:
                SetDataTxn setDataTxn = (SetDataTxn) txn;
                debug = "Set data for  transaction for " + setDataTxn.getPath();
                rc.stat = setData(setDataTxn.getPath(), setDataTxn.getData(), setDataTxn.getVersion(), header.getZxid(), header.getTime());
                break;
            case OpCode.setACL:
                SetACLTxn setACLTxn = (SetACLTxn) txn;
                debug = "Set ACL for  transaction for " + setACLTxn.getPath();
                rc.stat = setACL(setACLTxn.getPath(), setACLTxn.getAcl(), setACLTxn.getVersion());
                break;
            case OpCode.closeSession:
                killSession(header.getClientId(), header.getZxid());
                break;
            case OpCode.error:
                ErrorTxn errTxn = (ErrorTxn) txn;
                rc.err = errTxn.getErr();
                break;
        }
    } catch (KeeperException e) {
        // These are expected errors since we take a lazy snapshot
        if (initialized || (e.code() != Code.NONODE && e.code() != Code.NODEEXISTS)) {
            LOG.warn("Failed:" + debug, e);
        }
    }
    return rc;
}

Example 2 with DeleteTxn

use of org.apache.zookeeper_voltpatches.txn.DeleteTxn in project voltdb by VoltDB.

the class ZooKeeperServer method prepRequest.

/**
     * This method will be called inside the ProcessRequestThread, which is a
     * singleton, so there will be a single thread calling this code.
     *
     * @param request
     */
public void prepRequest(Request request, long txnId) {
    // LOG.info("Prep>>> cxid = " + request.cxid + " type = " +
    // request.type + " id = 0x" + Long.toHexString(request.sessionId));
    TxnHeader txnHeader = null;
    Record txn = null;
    try {
        switch(request.type) {
            case OpCode.create:
                txnHeader = new TxnHeader(request.sessionId, request.cxid, txnId, getTime(), OpCode.create);
                CreateRequest createRequest = new CreateRequest();
                ZooKeeperServer.byteBuffer2Record(request.request, createRequest);
                String path = createRequest.getPath();
                int lastSlash = path.lastIndexOf('/');
                if (lastSlash == -1 || path.indexOf('\0') != -1) {
                    LOG.info("Invalid path " + path + " with session 0x" + Long.toHexString(request.sessionId));
                    throw new KeeperException.BadArgumentsException(path);
                }
                if (!fixupACL(request.authInfo, createRequest.getAcl())) {
                    throw new KeeperException.InvalidACLException(path);
                }
                String parentPath = path.substring(0, lastSlash);
                ChangeRecord parentRecord = getRecordForPath(parentPath);
                checkACL(parentRecord.acl, ZooDefs.Perms.CREATE, request.authInfo);
                int parentCVersion = parentRecord.stat.getCversion();
                CreateMode createMode = CreateMode.fromFlag(createRequest.getFlags());
                if (createMode.isSequential()) {
                    path = path + String.format("%010d", parentCVersion);
                }
                try {
                    PathUtils.validatePath(path);
                } catch (IllegalArgumentException ie) {
                    LOG.info("Invalid path " + path + " with session 0x" + Long.toHexString(request.sessionId));
                    throw new KeeperException.BadArgumentsException(path);
                }
                try {
                    if (getRecordForPath(path) != null) {
                        throw new KeeperException.NodeExistsException(path);
                    }
                } catch (KeeperException.NoNodeException e) {
                // ignore this one
                }
                boolean ephemeralParent = parentRecord.stat.getEphemeralOwner() != 0;
                if (ephemeralParent) {
                    throw new KeeperException.NoChildrenForEphemeralsException(path);
                }
                txn = new CreateTxn(path, createRequest.getData(), createRequest.getAcl(), createMode.isEphemeral());
                StatPersisted s = new StatPersisted();
                if (createMode.isEphemeral()) {
                    s.setEphemeralOwner(request.sessionId);
                }
                parentRecord = parentRecord.duplicate(txnHeader.getZxid());
                parentRecord.childCount++;
                parentRecord.stat.setCversion(parentRecord.stat.getCversion() + 1);
                addChangeRecord(parentRecord);
                addChangeRecord(new ChangeRecord(txnHeader.getZxid(), path, s, 0, createRequest.getAcl()));
                break;
            case OpCode.delete:
                txnHeader = new TxnHeader(request.sessionId, request.cxid, txnId, getTime(), OpCode.delete);
                DeleteRequest deleteRequest = new DeleteRequest();
                ZooKeeperServer.byteBuffer2Record(request.request, deleteRequest);
                path = deleteRequest.getPath();
                lastSlash = path.lastIndexOf('/');
                if (lastSlash == -1 || path.indexOf('\0') != -1 || getZKDatabase().isSpecialPath(path)) {
                    throw new KeeperException.BadArgumentsException(path);
                }
                parentPath = path.substring(0, lastSlash);
                parentRecord = getRecordForPath(parentPath);
                ChangeRecord nodeRecord = getRecordForPath(path);
                checkACL(parentRecord.acl, ZooDefs.Perms.DELETE, request.authInfo);
                int version = deleteRequest.getVersion();
                if (version != -1 && nodeRecord.stat.getVersion() != version) {
                    throw new KeeperException.BadVersionException(path);
                }
                if (nodeRecord.childCount > 0) {
                    throw new KeeperException.NotEmptyException(path);
                }
                txn = new DeleteTxn(path);
                parentRecord = parentRecord.duplicate(txnHeader.getZxid());
                parentRecord.childCount--;
                parentRecord.stat.setCversion(parentRecord.stat.getCversion() + 1);
                addChangeRecord(parentRecord);
                addChangeRecord(new ChangeRecord(txnHeader.getZxid(), path, null, -1, null));
                break;
            case OpCode.setData:
                txnHeader = new TxnHeader(request.sessionId, request.cxid, txnId, getTime(), OpCode.setData);
                SetDataRequest setDataRequest = new SetDataRequest();
                ZooKeeperServer.byteBuffer2Record(request.request, setDataRequest);
                path = setDataRequest.getPath();
                nodeRecord = getRecordForPath(path);
                checkACL(nodeRecord.acl, ZooDefs.Perms.WRITE, request.authInfo);
                version = setDataRequest.getVersion();
                int currentVersion = nodeRecord.stat.getVersion();
                if (version != -1 && version != currentVersion) {
                    throw new KeeperException.BadVersionException(path);
                }
                version = currentVersion + 1;
                txn = new SetDataTxn(path, setDataRequest.getData(), version);
                nodeRecord = nodeRecord.duplicate(txnHeader.getZxid());
                nodeRecord.stat.setVersion(version);
                addChangeRecord(nodeRecord);
                break;
            case OpCode.setACL:
                txnHeader = new TxnHeader(request.sessionId, request.cxid, txnId, getTime(), OpCode.setACL);
                SetACLRequest setAclRequest = new SetACLRequest();
                ZooKeeperServer.byteBuffer2Record(request.request, setAclRequest);
                path = setAclRequest.getPath();
                if (!fixupACL(request.authInfo, setAclRequest.getAcl())) {
                    throw new KeeperException.InvalidACLException(path);
                }
                nodeRecord = getRecordForPath(path);
                checkACL(nodeRecord.acl, ZooDefs.Perms.ADMIN, request.authInfo);
                version = setAclRequest.getVersion();
                currentVersion = nodeRecord.stat.getAversion();
                if (version != -1 && version != currentVersion) {
                    throw new KeeperException.BadVersionException(path);
                }
                version = currentVersion + 1;
                txn = new SetACLTxn(path, setAclRequest.getAcl(), version);
                nodeRecord = nodeRecord.duplicate(txnHeader.getZxid());
                nodeRecord.stat.setAversion(version);
                addChangeRecord(nodeRecord);
                break;
            case OpCode.createSession:
                txnHeader = new TxnHeader(request.sessionId, request.cxid, txnId, getTime(), OpCode.createSession);
                request.request.rewind();
                int to = request.request.getInt();
                txn = new CreateSessionTxn((Long) request.getOwner());
                request.request.rewind();
                sessionTracker.addSession(request.sessionId, (Long) request.getOwner());
                break;
            case OpCode.closeSession:
                txnHeader = new TxnHeader(request.sessionId, request.cxid, txnId, getTime(), OpCode.closeSession);
                // We don't want to do this check since the session expiration
                // thread
                // queues up this operation without being the session owner.
                // this request is the last of the session so it should be ok
                // zks.sessionTracker.checkSession(request.sessionId,
                // request.getOwner());
                HashSet<String> es = getZKDatabase().getEphemerals(request.sessionId);
                synchronized (outstandingChanges) {
                    for (ChangeRecord c : outstandingChanges) {
                        if (c.stat == null) {
                            // Doing a delete
                            es.remove(c.path);
                        } else if (c.stat.getEphemeralOwner() == request.sessionId) {
                            es.add(c.path);
                        }
                    }
                    for (String path2Delete : es) {
                        addChangeRecord(new ChangeRecord(txnHeader.getZxid(), path2Delete, null, 0, null));
                    }
                }
                sessionTracker.removeSession(request.sessionId);
                LOG.info("Processed session termination for sessionid: 0x" + Long.toHexString(request.sessionId));
                break;
            case OpCode.sync:
            case OpCode.exists:
            case OpCode.getData:
            case OpCode.getACL:
            case OpCode.getChildren:
            case OpCode.getChildren2:
            case OpCode.ping:
            case OpCode.setWatches:
            default:
        }
    } catch (KeeperException e) {
        if (txnHeader != null) {
            txnHeader.setType(OpCode.error);
            txn = new ErrorTxn(e.code().intValue());
        }
        LOG.debug("Got user-level KeeperException when processing " + request.toString() + " Error Path:" + e.getPath() + " Error:" + e.getMessage());
        request.setException(e);
    } catch (Exception e) {
        // log at error level as we are returning a marshalling
        // error to the user
        LOG.error("Failed to process " + request, e);
        StringBuilder sb = new StringBuilder();
        ByteBuffer bb = request.request;
        if (bb != null) {
            bb.rewind();
            while (bb.hasRemaining()) {
                sb.append(Integer.toHexString(bb.get() & 0xff));
            }
        } else {
            sb.append("request buffer is null");
        }
        LOG.error("Dumping request buffer: 0x" + sb.toString());
        if (txnHeader != null) {
            txnHeader.setType(OpCode.error);
            txn = new ErrorTxn(Code.MARSHALLINGERROR.intValue());
        }
    }
    request.hdr = txnHeader;
    request.txn = txn;
    request.zxid = txnId;
    executeRequest(request);
}

Example 3 with DeleteTxn

use of org.apache.zookeeper_voltpatches.txn.DeleteTxn in project voltdb by VoltDB.

the class SerializeUtils method deserializeTxn.

public static Record deserializeTxn(InputArchive ia, TxnHeader hdr) throws IOException {
    hdr.deserialize(ia, "hdr");
    Record txn = null;
    switch(hdr.getType()) {
        case OpCode.createSession:
            // This isn't really an error txn; it just has the same
            // format. The error represents the timeout
            txn = new CreateSessionTxn();
            break;
        case OpCode.closeSession:
            return null;
        case OpCode.create:
            txn = new CreateTxn();
            break;
        case OpCode.delete:
            txn = new DeleteTxn();
            break;
        case OpCode.setData:
            txn = new SetDataTxn();
            break;
        case OpCode.setACL:
            txn = new SetACLTxn();
            break;
        case OpCode.error:
            txn = new ErrorTxn();
            break;
    }
    if (txn != null) {
        txn.deserialize(ia, "txn");
    }
    return txn;
}

Example 4 with DeleteTxn

use of org.apache.zookeeper_voltpatches.txn.DeleteTxn in project voltdb by VoltDB.

the class DeleteTxn method equals.

@Override
public boolean equals(Object peer_) {
    if (!(peer_ instanceof DeleteTxn)) {
        return false;
    }
    if (peer_ == this) {
        return true;
    }
    DeleteTxn peer = (DeleteTxn) peer_;
    boolean ret = false;
    ret = path.equals(peer.path);
    if (!ret)
        return ret;
    return ret;
}

Example 5 with DeleteTxn

use of org.apache.zookeeper_voltpatches.txn.DeleteTxn in project voltdb by VoltDB.

the class DeleteTxn method compareTo.

public int compareTo(Object peer_) throws ClassCastException {
    if (!(peer_ instanceof DeleteTxn)) {
        throw new ClassCastException("Comparing different types of records.");
    }
    DeleteTxn peer = (DeleteTxn) peer_;
    int ret = 0;
    ret = path.compareTo(peer.path);
    if (ret != 0)
        return ret;
    return ret;
}