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ProjectionsClient.cs
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using System;
using System.Net;
using System.Threading.Tasks;
using EventStore.ClientAPI.Exceptions;
using EventStore.ClientAPI.SystemData;
using EventStore.ClientAPI.Transport.Http;
using HttpStatusCode = EventStore.ClientAPI.Transport.Http.HttpStatusCode;
namespace EventStore.ClientAPI
{
internal class ProjectionsClient
{
private readonly HttpAsyncClient _client;
private readonly TimeSpan _operationTimeout;
public ProjectionsClient(ILogger log, TimeSpan operationTimeout)
{
_operationTimeout = operationTimeout;
_client = new HttpAsyncClient(log);
}
public Task Enable(IPEndPoint endPoint, string name, UserCredentials userCredentials = null)
{
return SendPost(endPoint.ToHttpUrl("/projection/{0}/command/enable", name), string.Empty, userCredentials, HttpStatusCode.OK);
}
public Task Disable(IPEndPoint endPoint, string name, UserCredentials userCredentials = null)
{
return SendPost(endPoint.ToHttpUrl("/projection/{0}/command/disable", name), string.Empty, userCredentials, HttpStatusCode.OK);
}
public Task Abort(IPEndPoint endPoint, string name, UserCredentials userCredentials = null)
{
return SendPost(endPoint.ToHttpUrl("/projection/{0}/command/abort", name), string.Empty, userCredentials, HttpStatusCode.OK);
}
public Task CreateOneTime(IPEndPoint endPoint, string query, UserCredentials userCredentials = null)
{
return SendPost(endPoint.ToHttpUrl("/projections/onetime?type=JS"), query, userCredentials, HttpStatusCode.Created);
}
public Task CreateTransient(IPEndPoint endPoint, string name, string query, UserCredentials userCredentials = null)
{
return SendPost(
endPoint.ToHttpUrl("/projections/transient?name={0}&type=JS", name),
query,
userCredentials,
HttpStatusCode.Created);
}
public Task CreateContinuous(IPEndPoint endPoint, string name, string query, UserCredentials userCredentials = null)
{
return SendPost(endPoint.ToHttpUrl("/projections/continuous?name={0}&type=JS&emit=1", name),
query, userCredentials, HttpStatusCode.Created);
}
public Task<string> ListAll(IPEndPoint endPoint, UserCredentials userCredentials = null)
{
return SendGet(endPoint.ToHttpUrl("/projections/any"), userCredentials, HttpStatusCode.OK);
}
public Task<string> ListOneTime(IPEndPoint endPoint, UserCredentials userCredentials = null)
{
return SendGet(endPoint.ToHttpUrl("/projections/onetime"), userCredentials, HttpStatusCode.OK);
}
public Task<string> ListContinuous(IPEndPoint endPoint, UserCredentials userCredentials = null)
{
return SendGet(endPoint.ToHttpUrl("/projections/continuous"), userCredentials, HttpStatusCode.OK);
}
public Task<string> GetStatus(IPEndPoint endPoint, string name, UserCredentials userCredentials = null)
{
return SendGet(endPoint.ToHttpUrl("/projection/{0}", name), userCredentials, HttpStatusCode.OK);
}
public Task<string> GetState(IPEndPoint endPoint, string name, UserCredentials userCredentials = null)
{
return SendGet(endPoint.ToHttpUrl("/projection/{0}/state", name), userCredentials, HttpStatusCode.OK);
}
public Task<string> GetStatistics(IPEndPoint endPoint, string name, UserCredentials userCredentials = null)
{
return SendGet(endPoint.ToHttpUrl("/projection/{0}/statistics", name), userCredentials, HttpStatusCode.OK);
}
public Task<string> GetQuery(IPEndPoint endPoint, string name, UserCredentials userCredentials = null)
{
return SendGet(endPoint.ToHttpUrl("/projection/{0}/query", name), userCredentials, HttpStatusCode.OK);
}
public Task UpdateQuery(IPEndPoint endPoint, string name, string query, UserCredentials userCredentials = null)
{
return SendPut(endPoint.ToHttpUrl("/projection/{0}/query?type=JS", name), query, userCredentials, HttpStatusCode.OK);
}
public Task Delete(IPEndPoint endPoint, string name, UserCredentials userCredentials = null)
{
return SendDelete(endPoint.ToHttpUrl("/projection/{0}", name), userCredentials, HttpStatusCode.OK);
}
private Task<string> SendGet(string url, UserCredentials userCredentials, int expectedCode)
{
var source = new TaskCompletionSource<string>();
_client.Get(url,
userCredentials,
_operationTimeout,
response =>
{
if (response.HttpStatusCode == expectedCode)
source.SetResult(response.Body);
else
source.SetException(new ProjectionCommandFailedException(
response.HttpStatusCode,
string.Format("Server returned {0} ({1}) for GET on {2}",
response.HttpStatusCode,
response.StatusDescription,
url)));
},
source.SetException);
return source.Task;
}
private Task<string> SendDelete(string url, UserCredentials userCredentials, int expectedCode)
{
var source = new TaskCompletionSource<string>();
_client.Delete(url,
userCredentials,
_operationTimeout,
response =>
{
if (response.HttpStatusCode == expectedCode)
source.SetResult(response.Body);
else
source.SetException(new ProjectionCommandFailedException(
response.HttpStatusCode,
string.Format("Server returned {0} ({1}) for DELETE on {2}",
response.HttpStatusCode,
response.StatusDescription,
url)));
},
source.SetException);
return source.Task;
}
private Task SendPut(string url, string content, UserCredentials userCredentials, int expectedCode)
{
var source = new TaskCompletionSource<object>();
_client.Put(url,
content,
"application/json",
userCredentials,
_operationTimeout,
response =>
{
if (response.HttpStatusCode == expectedCode)
source.SetResult(null);
else
source.SetException(new ProjectionCommandFailedException(
response.HttpStatusCode,
string.Format("Server returned {0} ({1}) for PUT on {2}",
response.HttpStatusCode,
response.StatusDescription,
url)));
},
source.SetException);
return source.Task;
}
private Task SendPost(string url, string content, UserCredentials userCredentials, int expectedCode)
{
var source = new TaskCompletionSource<object>();
_client.Post(url,
content,
"application/json",
_operationTimeout,
userCredentials,
response =>
{
if (response.HttpStatusCode == expectedCode)
source.SetResult(null);
else if (response.HttpStatusCode == 409)
source.SetException(new ProjectionCommandConflictException(response.HttpStatusCode,
response.StatusDescription));
else
source.SetException(new ProjectionCommandFailedException(response.HttpStatusCode,
string.Format("Server returned {0} ({1}) for POST on {2}",
response.HttpStatusCode,
response.StatusDescription,
url)));
},
source.SetException);
return source.Task;
}
}
}