100 lines
2.8 KiB
JavaScript
100 lines
2.8 KiB
JavaScript
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// Copyright (c) 2024, Oracle and/or its affiliates.
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//-----------------------------------------------------------------------------
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//
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// This software is dual-licensed to you under the Universal Permissive License
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// (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
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// 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
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// either license.
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//
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// If you elect to accept the software under the Apache License, Version 2.0,
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// the following applies:
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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//-----------------------------------------------------------------------------
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'use strict';
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const Message = require("./base.js");
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const constants = require("../constants.js");
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/**
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* Used for two-phase commit (TPC) transaction change state: commit, rollback,
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* forget, etc.
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*
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* @class TransactionChangeStateMessage
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* @extends {Message}
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*/
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class TransactionChangeStateMessage extends Message {
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constructor(connImpl) {
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super(connImpl);
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this.functionCode = constants.TNS_FUNC_TPC_TXN_CHANGE_STATE;
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}
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processReturnParameter(buf) {
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// process the parameters returned by the datatabase
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this.state = buf.readUB4();
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}
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encode(buf) {
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// writes the message to the database
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// acquire data to send to the server
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let xidBytes;
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if (this.xid) {
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xidBytes = Buffer.alloc(128);
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this.xid.globalTransactionId.copy(xidBytes);
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this.xid.branchQualifier.copy(xidBytes,
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this.xid.globalTransactionId.length);
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}
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this.writeFunctionHeader(buf);
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buf.writeUB4(this.operation);
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if (this.context) {
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buf.writeUInt8(1);
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buf.writeUB4(this.context.length);
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} else {
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buf.writeUInt8(0);
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buf.writeUB4(0);
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}
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if (this.xid) {
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buf.writeUB4(this.xid.formatId);
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buf.writeUB4(this.xid.globalTransactionId.length);
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buf.writeUB4(this.xid.branchQualifier.length);
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buf.writeUInt8(1);
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buf.writeUB4(xidBytes.length);
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} else {
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buf.writeUB4(0);
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buf.writeUB4(0);
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buf.writeUB4(0);
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buf.writeUInt8(0);
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buf.writeUB4(0);
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}
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buf.writeUB4(0);
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buf.writeUB4(this.state);
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buf.writeUInt8(1);
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buf.writeUB4(this.flags);
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if (this.context) {
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buf.writeBytes(this.context);
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}
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if (this.xid) {
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buf.writeBytes(xidBytes);
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}
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}
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}
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module.exports = TransactionChangeStateMessage;
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