55 lines
2.6 KiB
JavaScript
55 lines
2.6 KiB
JavaScript
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var util = require('util');
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var SubscriptionOperation = require('./subscriptionOperation');
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var ClientMessage = require('../messages/clientMessage');
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var TcpPackage = require('../systemData/tcpPackage');
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var TcpCommand = require('../systemData/tcpCommand');
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var TcpFlags = require('../systemData/tcpFlags');
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var BufferSegment = require('../common/bufferSegment');
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var InspectionDecision = require('../systemData/inspectionDecision');
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var InspectionResult = require('./../systemData/inspectionResult');
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var results = require('../results');
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var VolatileEventStoreSubscription = require('../volatileEventStoreConnection');
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function VolatileSubscriptionOperation(
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log, cb, streamId, resolveLinkTos, userCredentials, eventAppeared,
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subscriptionDropped, verboseLogging, getConnection
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) {
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SubscriptionOperation.call(this, log, cb, streamId, resolveLinkTos, userCredentials, eventAppeared, subscriptionDropped, verboseLogging, getConnection);
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}
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util.inherits(VolatileSubscriptionOperation, SubscriptionOperation);
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VolatileSubscriptionOperation.prototype._createSubscriptionPackage = function() {
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var dto = new ClientMessage.SubscribeToStream(this._streamId, this._resolveLinkTos);
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return new TcpPackage(TcpCommand.SubscribeToStream,
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this._userCredentials != null ? TcpFlags.Authenticated : TcpFlags.None,
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this._correlationId,
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this._userCredentials != null ? this._userCredentials.username : null,
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this._userCredentials != null ? this._userCredentials.password : null,
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new BufferSegment(dto.encode().toBuffer()));
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};
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VolatileSubscriptionOperation.prototype._inspectPackage = function(pkg) {
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try {
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if (pkg.command == TcpCommand.SubscriptionConfirmation) {
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var dto = ClientMessage.SubscriptionConfirmation.decode(pkg.data.toBuffer());
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this._confirmSubscription(dto.last_commit_position, dto.last_event_number);
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return new InspectionResult(InspectionDecision.Subscribed, "SubscriptionConfirmation");
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}
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if (pkg.command == TcpCommand.StreamEventAppeared) {
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var dto = ClientMessage.StreamEventAppeared.decode(pkg.data.toBuffer());
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this._onEventAppeared(new results.ResolvedEvent(dto.event));
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return new InspectionResult(InspectionDecision.DoNothing, "StreamEventAppeared");
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}
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return null;
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} catch(e) {
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console.log(e.stack);
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return null;
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}
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};
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VolatileSubscriptionOperation.prototype._createSubscriptionObject = function(lastCommitPosition, lastEventNumber) {
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return new VolatileEventStoreSubscription(this, this._streamId, lastCommitPosition, lastEventNumber);
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};
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module.exports = VolatileSubscriptionOperation;
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