83 lines
3.8 KiB
JavaScript
83 lines
3.8 KiB
JavaScript
var util = require('util');
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var uuid = require('uuid');
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var TcpCommand = require('../systemData/tcpCommand');
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var InspectionDecision = require('../systemData/inspectionDecision');
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var InspectionResult = require('./../systemData/inspectionResult');
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var ClientMessage = require('../messages/clientMessage');
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var WriteResult = require('../results').WriteResult;
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var Position = require('../results').Position;
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var WrongExpectedVersionError = require('../errors/wrongExpectedVersionError');
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var StreamDeletedError = require('../errors/streamDeletedError');
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var AccessDeniedError = require('../errors/accessDeniedError');
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var OperationBase = require('../clientOperations/operationBase');
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function AppendToStreamOperation(log, cb, requireMaster, stream, expectedVersion, events, userCredentials) {
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OperationBase.call(this, log, cb, TcpCommand.WriteEvents, TcpCommand.WriteEventsCompleted, userCredentials);
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this._responseType = ClientMessage.WriteEventsCompleted;
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this._requireMaster = requireMaster;
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this._stream = stream;
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this._expectedVersion = expectedVersion;
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this._events = events;
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}
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util.inherits(AppendToStreamOperation, OperationBase);
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AppendToStreamOperation.prototype._createRequestDto = function() {
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var dtos = this._events.map(function(ev) {
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var eventId = new Buffer(uuid.parse(ev.eventId));
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return new ClientMessage.NewEvent({
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event_id: eventId, event_type: ev.type,
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data_content_type: ev.isJson ? 1 : 0, metadata_content_type: 0,
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data: ev.data, metadata: ev.metadata});
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});
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return new ClientMessage.WriteEvents({
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event_stream_id: this._stream,
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expected_version: this._expectedVersion,
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events: dtos,
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require_master: this._requireMaster});
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};
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AppendToStreamOperation.prototype._inspectResponse = function(response) {
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switch (response.result)
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{
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case ClientMessage.OperationResult.Success:
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if (this._wasCommitTimeout)
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this.log.debug("IDEMPOTENT WRITE SUCCEEDED FOR %s.", this);
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this._succeed();
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return new InspectionResult(InspectionDecision.EndOperation, "Success");
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case ClientMessage.OperationResult.PrepareTimeout:
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return new InspectionResult(InspectionDecision.Retry, "PrepareTimeout");
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case ClientMessage.OperationResult.ForwardTimeout:
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return new InspectionResult(InspectionDecision.Retry, "ForwardTimeout");
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case ClientMessage.OperationResult.CommitTimeout:
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this._wasCommitTimeout = true;
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return new InspectionResult(InspectionDecision.Retry, "CommitTimeout");
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case ClientMessage.OperationResult.WrongExpectedVersion:
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this.fail(new WrongExpectedVersionError("Append", this._stream, this._expectedVersion));
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return new InspectionResult(InspectionDecision.EndOperation, "WrongExpectedVersion");
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case ClientMessage.OperationResult.StreamDeleted:
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this.fail(new StreamDeletedError(this._stream));
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return new InspectionResult(InspectionDecision.EndOperation, "StreamDeleted");
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case ClientMessage.OperationResult.InvalidTransaction:
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this.fail(new Error("Invalid transaction."));
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return new InspectionResult(InspectionDecision.EndOperation, "InvalidTransaction");
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case ClientMessage.OperationResult.AccessDenied:
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this.fail(new AccessDeniedError("Write", this._stream));
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return new InspectionResult(InspectionDecision.EndOperation, "AccessDenied");
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default:
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throw new Error("Unexpected OperationResult: " + response.result);
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}
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};
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AppendToStreamOperation.prototype._transformResponse = function(response) {
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return new WriteResult(response.last_event_number, new Position(response.prepare_position || -1, response.commit_position || -1));
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};
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AppendToStreamOperation.prototype.toString = function() {
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return util.format("Stream: %s, ExpectedVersion: %d", this._stream, this._expectedVersion);
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};
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module.exports = AppendToStreamOperation;
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