| | | 1 | | // Copyright (c) Microsoft. All rights reserved. |
| | | 2 | | // Licensed under the MIT license. See LICENSE file in the project root for full license information.using System; |
| | | 3 | | |
| | | 4 | | namespace Microsoft.Azure.EventHubs.ServiceFabricProcessor |
| | | 5 | | { |
| | | 6 | | using System; |
| | | 7 | | using System.Collections.Generic; |
| | | 8 | | using System.Threading; |
| | | 9 | | using System.Threading.Tasks; |
| | | 10 | | |
| | | 11 | | /// <summary> |
| | | 12 | | /// Interface for processing events. |
| | | 13 | | /// </summary> |
| | | 14 | | public abstract class IEventProcessor |
| | | 15 | | { |
| | | 16 | | /// <summary> |
| | | 17 | | /// Called on startup. |
| | | 18 | | /// </summary> |
| | | 19 | | /// <param name="cancellationToken"></param> |
| | | 20 | | /// <param name="context"></param> |
| | | 21 | | /// <returns></returns> |
| | | 22 | | abstract public Task OpenAsync(CancellationToken cancellationToken, PartitionContext context); |
| | | 23 | | |
| | | 24 | | /// <summary> |
| | | 25 | | /// Called on shutdown. |
| | | 26 | | /// </summary> |
| | | 27 | | /// <param name="context"></param> |
| | | 28 | | /// <param name="reason"></param> |
| | | 29 | | /// <returns></returns> |
| | | 30 | | abstract public Task CloseAsync(PartitionContext context, CloseReason reason); |
| | | 31 | | |
| | | 32 | | /// <summary> |
| | | 33 | | /// Called when events are available. |
| | | 34 | | /// </summary> |
| | | 35 | | /// <param name="cancellationToken"></param> |
| | | 36 | | /// <param name="context"></param> |
| | | 37 | | /// <param name="events"></param> |
| | | 38 | | /// <returns></returns> |
| | | 39 | | abstract public Task ProcessEventsAsync(CancellationToken cancellationToken, PartitionContext context, IEnumerab |
| | | 40 | | |
| | | 41 | | /// <summary> |
| | | 42 | | /// Called when an error occurs. |
| | | 43 | | /// </summary> |
| | | 44 | | /// <param name="context"></param> |
| | | 45 | | /// <param name="error"></param> |
| | | 46 | | /// <returns></returns> |
| | | 47 | | abstract public Task ProcessErrorAsync(PartitionContext context, Exception error); |
| | | 48 | | |
| | | 49 | | /// <summary> |
| | | 50 | | /// Called periodically to get user-supplied load metrics. |
| | | 51 | | /// </summary> |
| | | 52 | | /// <param name="cancellationToken"></param> |
| | | 53 | | /// <param name="context"></param> |
| | | 54 | | /// <returns></returns> |
| | | 55 | | virtual public Dictionary<string, int> GetLoadMetric(CancellationToken cancellationToken, PartitionContext conte |
| | | 56 | | { |
| | | 57 | | // By default all partitions have a metric of named CountOfPartitions with value 1. If Service Fabric is con |
| | | 58 | | // it will balance primaries across nodes simply by the number of primaries on a node. This can be overridde |
| | | 59 | | // more sophisticated metrics like number of events processed or CPU usage. |
| | 8 | 60 | | Dictionary<string, int> defaultMetric = new Dictionary<string, int>(); |
| | 8 | 61 | | defaultMetric.Add(Constants.DefaultUserLoadMetricName, 1); |
| | 8 | 62 | | return defaultMetric; |
| | | 63 | | } |
| | | 64 | | } |
| | | 65 | | } |