Add InfluxDB backend (#47)

Cargo.toml

@@ -22,6 +22,7 @@ members = [
   "plugins/zenoh-http",
   "plugins/zenoh-storages",
   "backends/traits",
+  "backends/influxdb",
 ]
 
 exclude = [

backends/influxdb/Cargo.toml

@@ -0,0 +1,44 @@
+#
+# Copyright (c) 2017, 2020 ADLINK Technology Inc.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Eclipse Public License 2.0 which is available at
+# http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
+# which is available at https://www.apache.org/licenses/LICENSE-2.0.
+#
+# SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+#
+# Contributors:
+#   ADLINK zenoh team, <[email protected]>
+#
+[package]
+name = "zenoh_backend_influxdb"
+version = "0.5.0-beta.5"
+authors = ["kydos <[email protected]>",
+           "Julien Enoch <[email protected]>",
+           "Olivier Hécart <[email protected]>",
+		   "Luca Cominardi <[email protected]>"]
+edition = "2018"
+
+[lib]
+name = "zbackend_influxdb"
+crate-type = ["cdylib"]
+
+[dependencies]
+zenoh_backend_traits = { version = "0.5.0-beta.5", path = "../traits" }
+zenoh = { version = "0.5.0-beta.5", path = "../../zenoh" }
+zenoh-util = { version = "0.5.0-beta.5", path = "../../zenoh-util" }
+async-trait = "0.1"
+lazy_static = "1.4.0"
+regex = "1"
+env_logger = "0.7.1"
+log = "0.4"
+uuid = { version = "0.8", features = ["v4"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = { version = "1.0" }
+# TODO: set a version when influxdb-rust is release with its #72 PR
+influxdb = { git = "https://github.com/Empty2k12/influxdb-rust.git", rev = "cc8750a5", features = ["curl-client"] }
+
+[dependencies.async-std]
+version = "=1.6.5"
+features = ["unstable"]