コード例 #1
0
//
// DatabaseExists is a server-level command, so must be preceded by calling
// ConnectToServer, otherwise an authorization error will be returned.
// The storageType param must be either PersistentStorageType or VolatileStorageType.
//
func DatabaseExists(dbc *DBClient, dbname string, storageType constants.StorageType) (bool, error) {
	dbc.buf.Reset()

	if dbc.sessionId == NoSessionID {
		return false, oerror.SessionNotInitialized{}
	}

	// cmd
	err := rw.WriteByte(dbc.buf, REQUEST_DB_EXIST)
	if err != nil {
		return false, err
	}

	// session id
	err = rw.WriteInt(dbc.buf, dbc.sessionId)
	if err != nil {
		return false, err
	}

	// database name, storage-type
	err = rw.WriteStrings(dbc.buf, dbname, string(storageType))
	if err != nil {
		return false, err
	}

	// send to the OrientDB server
	_, err = dbc.conx.Write(dbc.buf.Bytes())
	if err != nil {
		return false, err
	}

	/* ---[ Read Response From Server ]--- */

	status, err := rw.ReadByte(dbc.conx)
	if err != nil {
		return false, err
	}

	err = readAndValidateSessionId(dbc.conx, dbc.sessionId)
	if err != nil {
		return false, err
	}

	if status == RESPONSE_STATUS_ERROR {
		serverExceptions, err := rw.ReadErrorResponse(dbc.conx)
		if err != nil {
			return false, err
		}
		return false, fmt.Errorf("Server Error(s): %v", serverExceptions)
	}

	// the answer to the query
	dbexists, err := rw.ReadBool(dbc.conx)
	if err != nil {
		return false, err
	}

	return dbexists, nil
}
コード例 #2
0
ファイル: binserde.go プロジェクト: harveymonster/ogonori
//
// readDataValue reads the next data section from `buf` according
// to the type of the property (property.Typ) and updates the OField object
// to have the value.
//
func (serde ORecordSerializerV0) readDataValue(buf *obuf.ReadBuf, datatype oschema.ODataType) (interface{}, error) {
	var (
		val interface{}
		err error
	)
	switch datatype {
	case oschema.BOOLEAN:
		val, err = rw.ReadBool(buf)
		ogl.Debugf("DEBUG BOOL: +readDataVal val: %v\n", val) // DEBUG

	case oschema.INTEGER:
		var i64 int64
		i64, err = varint.ReadVarIntAndDecode64(buf)
		if err == nil {
			val = int32(i64)
		}
		ogl.Debugf("DEBUG INT: +readDataVal val: %v\n", val) // DEBUG

	case oschema.SHORT:
		var i32 int32
		i32, err = varint.ReadVarIntAndDecode32(buf)
		if err == nil {
			val = int16(i32)
		}
		ogl.Debugf("DEBUG SHORT: +readDataVal val: %v\n", val) // DEBUG

	case oschema.LONG:
		val, err = varint.ReadVarIntAndDecode64(buf)
		ogl.Debugf("DEBUG LONG: +readDataVal val: %v\n", val) // DEBUG

	case oschema.FLOAT:
		val, err = rw.ReadFloat(buf)
		ogl.Debugf("DEBUG FLOAT: +readDataVal val: %v\n", val) // DEBUG

	case oschema.DOUBLE:
		val, err = rw.ReadDouble(buf)
		ogl.Debugf("DEBUG DOUBLE: +readDataVal val: %v\n", val) // DEBUG

	case oschema.DATETIME:
		// OrientDB DATETIME is precise to the second
		val, err = serde.readDateTime(buf)
		ogl.Debugf("DEBUG DATEIME: +readDataVal val: %v\n", val) // DEBUG

	case oschema.DATE:
		// OrientDB DATE is precise to the day
		val, err = serde.readDate(buf)
		ogl.Debugf("DEBUG DATE: +readDataVal val: %v\n", val) // DEBUG

	case oschema.STRING:
		val, err = varint.ReadString(buf)
		ogl.Debugf("DEBUG STR: +readDataVal val: %v\n", val) // DEBUG

	case oschema.BINARY:
		val, err = varint.ReadBytes(buf)
		ogl.Debugf("DEBUG BINARY: +readDataVal val: %v\n", val) // DEBUG

	case oschema.EMBEDDED:
		doc := oschema.NewDocument("")
		err = serde.Deserialize(nil, doc, buf)
		val = interface{}(doc)
		// ogl.Debugf("DEBUG EMBEDDEDREC: +readDataVal val: %v\n", val) // DEBUG

	case oschema.EMBEDDEDLIST:
		val, err = serde.readEmbeddedCollection(buf)
		// ogl.Debugf("DEBUG EMBD-LIST: +readDataVal val: %v\n", val) // DEBUG

	case oschema.EMBEDDEDSET:
		val, err = serde.readEmbeddedCollection(buf) // TODO: may need to create a set type as well
		// ogl.Debugf("DEBUG EMBD-SET: +readDataVal val: %v\n", val) // DEBUG

	case oschema.EMBEDDEDMAP:
		val, err = serde.readEmbeddedMap(buf)
		// ogl.Debugf("DEBUG EMBD-MAP: +readDataVal val: %v\n", val) // DEBUG

	case oschema.LINK:
		// a link is two int64's (cluster:record) - we translate it here to a string RID
		val, err = serde.readLink(buf)
		ogl.Debugf("DEBUG LINK: +readDataVal val: %v\n", val) // DEBUG

	case oschema.LINKLIST, oschema.LINKSET:
		val, err = serde.readLinkList(buf)
		ogl.Debugf("DEBUG LINK LIST/SET: +readDataVal val: %v\n", val) // DEBUG

	case oschema.LINKMAP:
		val, err = serde.readLinkMap(buf)
		ogl.Debugf("DEBUG LINKMap: +readDataVal val: %v\n", val) // DEBUG

	case oschema.BYTE:
		val, err = rw.ReadByte(buf)
		ogl.Debugf("DEBUG BYTE: +readDataVal val: %v\n", val) // DEBUG

	case oschema.LINKBAG:
		val, err = serde.readLinkBag(buf)
		ogl.Debugf("DEBUG LINKBAG: +readDataVal val: %v\n", val) // DEBUG

	case oschema.CUSTOM:
		// TODO: impl me -> how? when is this used?
		panic("ORecordSerializerV0#readDataValue CUSTOM NOT YET IMPLEMENTED")
	case oschema.DECIMAL:
		// TODO: impl me -> Java client uses BigDecimal for this
		panic("ORecordSerializerV0#readDataValue DECIMAL NOT YET IMPLEMENTED")
	default:
		// ANY and TRANSIENT are do nothing ops
	}

	return val, err
}