Add RetentionPolicy support

src/InfluxDB.Collector/Configuration/CollectorEmitConfiguration.cs

@@ -5,11 +5,11 @@ namespace InfluxDB.Collector.Configuration
 {
     public abstract class CollectorEmitConfiguration
     {
-        public abstract CollectorConfiguration InfluxDB(Uri serverBaseAddress, string database, string username = null, string password = null);
+        public abstract CollectorConfiguration InfluxDB(Uri serverBaseAddress, string database, string username = null, string password = null, string retentionPolicy = null);
 
-        public CollectorConfiguration InfluxDB(string serverBaseAddress, string database, string username = null, string password = null)
+        public CollectorConfiguration InfluxDB(string serverBaseAddress, string database, string username = null, string password = null, string retentionPolicy = null)
         {
-            return InfluxDB(new Uri(serverBaseAddress), database, username, password);
+            return InfluxDB(new Uri(serverBaseAddress), database, username, password, retentionPolicy);
         }
 
         public abstract CollectorConfiguration Emitter(Action<PointData[]> emitter);

src/InfluxDB.Collector/Configuration/PipelinedCollectorEmitConfiguration.cs

@@ -20,12 +20,12 @@ public PipelinedCollectorEmitConfiguration(
             _configuration = configuration;
         }
 
-        public override CollectorConfiguration InfluxDB(Uri serverBaseAddress, string database, string username = null, string password = null)
+        public override CollectorConfiguration InfluxDB(Uri serverBaseAddress, string database, string username = null, string password = null, string retentionPolicy = null)
         {
             if (string.Compare(serverBaseAddress.Scheme, "udp", ignoreCase: true) == 0)
-                _client = new LineProtocolUdpClient(serverBaseAddress, database, username, password);
+                _client = new LineProtocolUdpClient(serverBaseAddress, database, username, password, retentionPolicy);
             else
-                _client = new LineProtocolClient(serverBaseAddress, database, username, password);
+                _client = new LineProtocolClient(serverBaseAddress, database, username, password, retentionPolicy);
             return _configuration;
         }
 

src/InfluxDB.LineProtocol/Client/LineProtocolClient.cs

@@ -14,8 +14,8 @@ public class LineProtocolClient : LineProtocolClientBase
     {
         private readonly HttpClient _httpClient;
 
-        public LineProtocolClient(Uri serverBaseAddress, string database, string username = null, string password = null)
-            : this(new HttpClientHandler(), serverBaseAddress, database, username, password)
+        public LineProtocolClient(Uri serverBaseAddress, string database, string username = null, string password = null, string retentionPolicy = null)
+            : this(new HttpClientHandler(), serverBaseAddress, database, username, password, retentionPolicy)
         {
         }
 
@@ -24,8 +24,9 @@ protected LineProtocolClient(
                 Uri serverBaseAddress,
                 string database,
                 string username,
-                string password)
-            :base(serverBaseAddress, database, username, password)
+                string password,
+                string retentionPolicy)
+            :base(serverBaseAddress, database, username, password, retentionPolicy)
         {
             if (serverBaseAddress == null)
                 throw new ArgumentNullException(nameof(serverBaseAddress));
@@ -42,6 +43,8 @@ protected override async Task<LineProtocolWriteResult> OnSendAsync(
             CancellationToken cancellationToken = default(CancellationToken))
         {
             var endpoint = $"write?db={Uri.EscapeDataString(_database)}";
+            if (!string.IsNullOrWhiteSpace(_retentionPolicy))
+                endpoint += $"&rp={Uri.EscapeDataString(_retentionPolicy)}";
             if (!string.IsNullOrEmpty(_username))
                 endpoint += $"&u={Uri.EscapeDataString(_username)}&p={Uri.EscapeDataString(_password)}";
 

src/InfluxDB.LineProtocol/Client/LineProtocolClientBase.cs

@@ -12,9 +12,9 @@ namespace InfluxDB.LineProtocol.Client
 {
     public abstract class LineProtocolClientBase : ILineProtocolClient
     {
-        protected readonly string _database, _username, _password;
+        protected readonly string _database, _username, _password, _retentionPolicy;
 
-        protected LineProtocolClientBase(Uri serverBaseAddress, string database, string username, string password)
+        protected LineProtocolClientBase(Uri serverBaseAddress, string database, string username, string password, string retentionPolicy)
         {
             if (serverBaseAddress == null)
                 throw new ArgumentNullException(nameof(serverBaseAddress));
@@ -25,6 +25,7 @@ protected LineProtocolClientBase(Uri serverBaseAddress, string database, string
             _database = database;
             _username = username;
             _password = password;
+            _retentionPolicy = retentionPolicy;
         }
 
         public Task<LineProtocolWriteResult> WriteAsync(LineProtocolPayload payload, CancellationToken cancellationToken = default(CancellationToken))

src/InfluxDB.LineProtocol/Client/LineProtocolUdpClient.cs

@@ -20,8 +20,9 @@ public LineProtocolUdpClient(
                         Uri serverBaseAddress,
                         string database,
                         string username = null,
-                        string password = null)
-            :base(serverBaseAddress, database, username, password)
+                        string password = null,
+                        string retentionPolicy = null)
+            :base(serverBaseAddress, database, username, password, retentionPolicy)
         {
             if (serverBaseAddress == null)
                 throw new ArgumentNullException(nameof(serverBaseAddress));

test/InfluxDB.LineProtocol.Tests/Client/MockLineProtocolClient.cs

@@ -11,7 +11,7 @@ public class MockLineProtocolClient : LineProtocolClient
         {
         }
 
-        private MockLineProtocolClient(MockHttpMessageHandler handler, Uri serverBaseAddress, string database) : base(handler, serverBaseAddress, database, null, null)
+        private MockLineProtocolClient(MockHttpMessageHandler handler, Uri serverBaseAddress, string database) : base(handler, serverBaseAddress, database, null, null, null)
         {
             Handler = handler;
             BaseAddress = serverBaseAddress;