Convert the binding to use the controller

Ease Time series DB abstraction layer by using
Dyn API that implemente the API defined by the JSON
schema.

Change-Id: I67de4fbca10048201fdd2da683732a5f4f5b5368
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

11 files changed, 368 insertions, 222 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 7c8c2b4..a016c14 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -22,12 +22,7 @@ PROJECT_TARGET_ADD(harvester)
 
 	# Define project Targets
 	add_library(${TARGET_NAME} MODULE
-		${TARGET_NAME}.c
-		plugins/tsdb.c
-		plugins/influxdb.c
-		plugins/influxdb-writer.c
-		plugins/influxdb-reader.c
-		utils/list.c
+		${TARGET_NAME}-binding.c
 	)
 
 	set(OPENAPI_DEF "harvester-apidef" CACHE STRING "name and path to the JSON API definition without extension")
@@ -43,5 +38,7 @@ PROJECT_TARGET_ADD(harvester)
 	# Library dependencies (include updates automatically)
 	TARGET_LINK_LIBRARIES(${TARGET_NAME}
 		afb-helpers
+		ctl-utilities
 		${link_libraries})
 
+add_subdirectory("plugins")
diff --git a/src/harvester-binding.c b/src/harvester-binding.c
new file mode 100644
index 0000000..c5d0602
--- /dev/null
+++ b/src/harvester-binding.c
@@ -0,0 +1,156 @@
+/*
+* Copyright (C) 2016 "IoT.bzh"
+* Author Fulup Ar Foll <fulup@iot.bzh>
+* Author Romain Forlot <romain@iot.bzh>
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+#include "harvester-binding.h"
+
+// default api to print log when apihandle not avaliable
+afb_dynapi *AFB_default;
+
+// Config Section definition (note: controls section index should match handle
+// retrieval in HalConfigExec)
+static CtlSectionT ctrlSections[] = {
+	{.key = "plugins" , .loadCB = PluginConfig},
+	{.key = "onload"  , .loadCB = OnloadConfig},
+	{.key = "controls", .loadCB = ControlConfig},
+	{.key = "events"  , .loadCB = EventConfig},
+	{.key = NULL}
+};
+
+static void ctrlapi_ping(AFB_ReqT request) {
+	static int count = 0;
+
+	count++;
+	AFB_ReqNotice(request, "Controller:ping count=%d", count);
+	AFB_ReqSucess(request, json_object_new_int(count), NULL);
+
+	return;
+}
+
+void ctrlapi_auth(AFB_ReqT request)
+{
+	AFB_ReqSetLOA(request, 1);
+	AFB_ReqSucess(request, NULL, NULL);
+}
+
+static AFB_ApiVerbs CtrlApiVerbs[] = {
+	/* VERB'S NAME         FUNCTION TO CALL         SHORT DESCRIPTION */
+	{.verb = "ping", .callback = ctrlapi_ping, .info = "ping test for API"},
+	{.verb = "auth", .callback = ctrlapi_auth, .info = "Authenticate session to raise Level Of Assurance of the session"},
+	{.verb = NULL} /* marker for end of the array */
+};
+
+static int CtrlLoadStaticVerbs(afb_dynapi *apiHandle, AFB_ApiVerbs *verbs) {
+	int errcount = 0;
+
+	for (int idx = 0; verbs[idx].verb; idx++) {
+		errcount += afb_dynapi_add_verb(
+				apiHandle, CtrlApiVerbs[idx].verb, NULL, CtrlApiVerbs[idx].callback,
+				(void *)&CtrlApiVerbs[idx], CtrlApiVerbs[idx].auth, 0);
+	}
+
+	return errcount;
+};
+
+static int CtrlInitOneApi(AFB_ApiT apiHandle) {
+	int err = 0;
+	AFB_default = apiHandle; // hugely hack to make all V2 AFB_DEBUG to work in fileutils
+
+	// retrieve section config from api handle
+	CtlConfigT *ctrlConfig = (CtlConfigT *)afb_dynapi_get_userdata(apiHandle);
+	err = CtlConfigExec(apiHandle, ctrlConfig);
+	if(err) {
+		AFB_ApiError(apiHandle, "Error at CtlConfigExec step");
+		return err;
+	}
+
+	return err;
+}
+
+// next generation dynamic API-V3 mode
+#include <signal.h>
+
+static int CtrlLoadOneApi(void *cbdata, AFB_ApiT apiHandle) {
+	CtlConfigT *ctrlConfig = (CtlConfigT *)cbdata;
+
+	// save closure as api's data context
+	afb_dynapi_set_userdata(apiHandle, ctrlConfig);
+
+	// add static controls verbs
+	int err = CtrlLoadStaticVerbs(apiHandle, CtrlApiVerbs);
+	if (err) {
+		AFB_ApiError(apiHandle, "CtrlLoadSection fail to register static V2 verbs");
+		return ERROR;
+	}
+
+	// load section for corresponding API
+	err = CtlLoadSections(apiHandle, ctrlConfig, ctrlSections);
+
+	// declare an event event manager for this API;
+	afb_dynapi_on_event(apiHandle, CtrlDispatchApiEvent);
+
+	// init API function (does not receive user closure ???
+	afb_dynapi_on_init(apiHandle, CtrlInitOneApi);
+
+	afb_dynapi_seal(apiHandle);
+	return err;
+}
+
+int afbBindingVdyn(afb_dynapi *apiHandle) {
+
+	AFB_default = apiHandle;
+	AFB_ApiNotice(apiHandle, "Controller in afbBindingVdyn");
+
+	const char *dirList = getenv("CONTROL_CONFIG_PATH");
+	if (!dirList)
+		dirList = CONTROL_CONFIG_PATH;
+
+	const char *configPath = CtlConfigSearch(apiHandle, dirList, "");
+	if (!configPath) {
+		AFB_ApiError(apiHandle, "CtlPreInit: No %s* config found in %s ", GetBinderName(), dirList);
+		return ERROR;
+	}
+
+	// load config file and create API
+	CtlConfigT *ctrlConfig = CtlLoadMetaData(apiHandle, configPath);
+	if (!ctrlConfig) {
+		AFB_ApiError(apiHandle,
+			"CtrlBindingDyn No valid control config file in:\n-- %s",
+			configPath);
+		return ERROR;
+	}
+
+	if (!ctrlConfig->api) {
+		AFB_ApiError(apiHandle,
+			"CtrlBindingDyn API Missing from metadata in:\n-- %s",
+			configPath);
+		return ERROR;
+	}
+
+	AFB_ApiNotice(apiHandle, "Controller API='%s' info='%s'", ctrlConfig->api,
+			ctrlConfig->info);
+
+	// create one API per config file (Pre-V3 return code ToBeChanged)
+	int status = afb_dynapi_new_api(apiHandle, ctrlConfig->api, ctrlConfig->info, 1, CtrlLoadOneApi, ctrlConfig);
+
+	return status;
+}
diff --git a/src/harvester.h b/src/harvester-binding.h
index b11fffe..7ac00a0 100644
--- a/src/harvester.h
+++ b/src/harvester-binding.h
@@ -1,12 +1,13 @@
 /*
- * Copyright (C) 2018 "IoT.bzh"
- * Author "Romain Forlot" <romain.forlot@iot.bzh>
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author Fulup Ar Foll <fulup@iot.bzh>
+ * Author Romain Forlot <romain@iot.bzh>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *	 http://www.apache.org/licenses/LICENSE-2.0
+ *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -14,20 +15,18 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#ifndef _HARVESTER_H_
-#define _HARVESTER_H_
 
-#define AFB_BINDING_VERSION 2
-#include <afb/afb-binding.h>
 
-enum metric_type {b = 0, i, d, str} type;
-union metric_value {
-	int b_value;
-	int i_value;
-	double d_value;
-	char *str_value;
-};
+#ifndef _CTL_BINDING_INCLUDE_
+#define _CTL_BINDING_INCLUDE_
 
-int init();
+#include <stdio.h>
+#include <ctl-config.h>
+#include <filescan-utils.h>
+#include <wrap-json.h>
 
+#ifndef ERROR
+  #define ERROR -1
 #endif
+
+#endif /* _CTL_BINDING_INCLUDE_ */
diff --git a/src/harvester.c b/src/harvester.c
deleted file mode 100644
index 1d4d9a6..0000000
--- a/src/harvester.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 2018 "IoT.bzh"
- * Author "Romain Forlot" <romain.forlot@iot.bzh>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *	 http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define _GNU_SOURCE
-#include "harvester.h"
-#include "harvester-apidef.h"
-
-#include "plugins/tsdb.h"
-#include "curl-wrap.h"
-#include "wrap-json.h"
-
-CURL* (*tsdb_write)(const char* host, const char *port, json_object *metric);
-void (*write_curl_cb)(void *closure, int status, CURL *curl, const char *result, size_t size);
-
-struct reader_args r_args = {NULL, NULL, 1000000};
-
-int do_write(struct afb_req req, const char* host, const char *port, json_object *metric)
-{
-	CURL *curl_request;
-
-	curl_request = tsdb_write(host, port, metric);
-	curl_wrap_do(curl_request, write_curl_cb, &req);
-
-	return 0;
-}
-
-void afv_write(struct afb_req req)
-{
-	const char *port = NULL;
-	const char *host = NULL;
-
-	json_object *req_args = afb_req_json(req),
-				*portJ = NULL,
-				*metric = NULL;
-
-	if(wrap_json_unpack(req_args, "{s?s,s?o,so!}",
-			"host", &host,
-			"port", &portJ,
-			"metric", &metric) || ! metric)
-		afb_req_fail(req, "Failed", "Error processing arguments. Miss metric\
-JSON object or malformed");
-	else {
-		port = json_object_is_type(portJ, json_type_null) ?
-				NULL : json_object_to_json_string(portJ);
-		if(do_write(req, host, port, metric))
-			afb_req_fail(req, "Failed", "Error processing metric JSON object.\
-Malformed !");
-	}
-}
-
-void afv_auth(struct afb_req request)
-{
-	afb_req_session_set_LOA(request, 1);
-	afb_req_success(request, NULL, NULL);
-}
-
-int init()
-{
-	int tsdb_available = 0;
-
-	if(curl_global_init(CURL_GLOBAL_DEFAULT) != 0) {
-		AFB_ERROR("Something went wrong initiliazing libcurl. Abort");
-		return ERROR;
-	}
-
-	tsdb_available = db_ping();
-	switch (tsdb_available) {
-		case INFLUX:
-			tsdb_write = influxdb_write;
-			write_curl_cb = influxdb_write_curl_cb;
-			/*if(influxdb_reader(&r_args) != 0) {
-				AFB_ERROR("Problem initiating reader timer. Abort");
-				return ERROR;
-			}*/
-			break;
-		default:
-			AFB_ERROR("No Time Series Database found. Abort");
-			return ERROR;
-			break;
-	}
-	/* TODO:*/
-	return 0;
-}
diff --git a/src/plugins/CMakeLists.txt b/src/plugins/CMakeLists.txt
new file mode 100644
index 0000000..e366685
--- /dev/null
+++ b/src/plugins/CMakeLists.txt
@@ -0,0 +1,44 @@
+###########################################################################
+# Copyright 2015, 2016, 2017 IoT.bzh
+#
+# author: Romain Forlot <romain.forlot@iot.bzh>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#	http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+###########################################################################
+
+PROJECT_TARGET_ADD(influxdb)
+
+		# Define targets
+		ADD_LIBRARY(${TARGET_NAME} MODULE
+			${TARGET_NAME}.c
+			${TARGET_NAME}-writer.c
+			${TARGET_NAME}-reader.c
+			tsdb.c
+			../utils/list.c)
+
+		# Alsa Plugin properties
+		SET_TARGET_PROPERTIES(${TARGET_NAME} PROPERTIES
+				LABELS "PLUGIN"
+				PREFIX ""
+				SUFFIX ".ctlso"
+				OUTPUT_NAME ${TARGET_NAME}
+		)
+
+		# Library dependencies (include updates automatically)
+		TARGET_LINK_LIBRARIES(${TARGET_NAME}
+				afb-helpers
+				${link_libraries}
+		)
+
+		target_include_directories(${TARGET_NAME}
+		PRIVATE "${CMAKE_SOURCE_DIR}/app-controller-submodule/ctl-lib")
diff --git a/src/plugins/influxdb-reader.c b/src/plugins/influxdb-reader.c
index a1fa3a0..052a3da 100644
--- a/src/plugins/influxdb-reader.c
+++ b/src/plugins/influxdb-reader.c
@@ -29,6 +29,7 @@
 struct metrics_list {
 	struct series_t serie;
 	json_object *metricsJ;
+	AFB_ApiT api;
 };
 
 static void fill_n_send_values(void *c, json_object *valuesJ)
@@ -44,7 +45,7 @@ static void fill_n_send_values(void *c, json_object *valuesJ)
 		else {
 			if(set_value(m_list->serie.serie_columns.tags, valuesJ, i)) {
 				if(set_value(m_list->serie.serie_columns.fields, valuesJ, j)) {
-					AFB_ERROR("No tags nor fields fits.");
+					AFB_ApiError(m_list->api, "No tags nor fields fits.");
 				}
 				j++;
 			}
@@ -85,7 +86,7 @@ static void unpack_metric_from_db(void *ml, json_object *metricJ)
 					 "name", &m_list->serie.name,
 					 "columns", &columnsJ,
 					 "values", &valuesJ)) {
-		AFB_ERROR("Unpacking metric goes wrong");
+		AFB_ApiError(m_list->api, "Unpacking metric goes wrong");
 		return;
 	 }
 
@@ -93,7 +94,7 @@ static void unpack_metric_from_db(void *ml, json_object *metricJ)
 	wrap_json_array_for_all(valuesJ, fill_n_send_values, m_list);
 }
 
-static json_object *unpack_series(json_object *seriesJ)
+static json_object *unpack_series(AFB_ApiT apiHandle, json_object *seriesJ)
 {
 	struct metrics_list m_list = {
 		.serie = {
@@ -104,7 +105,8 @@ static json_object *unpack_series(json_object *seriesJ)
 			},
 			.timestamp = 0
 		},
-		.metricsJ = json_object_new_array()
+		.metricsJ = json_object_new_array(),
+		.api = apiHandle
 	};
 
 	wrap_json_array_for_all(seriesJ, unpack_metric_from_db, (void*)&m_list);
@@ -112,7 +114,7 @@ static json_object *unpack_series(json_object *seriesJ)
 	return m_list.metricsJ;
 }
 
-static void forward_to_garner(const char *result, size_t size)
+static void forward_to_garner(AFB_ApiT apiHandle, const char *result, size_t size)
 {
 	int id = 0;
 	json_object *resultsJ = NULL,
@@ -131,39 +133,42 @@ static void forward_to_garner(const char *result, size_t size)
 	}
 
 	if(seriesJ) {
-		metrics2send = unpack_series(seriesJ);
+		metrics2send = unpack_series(apiHandle, seriesJ);
 		if(json_object_array_length(metrics2send)) {
-			if(afb_service_call_sync("garner", "write", metrics2send, &call_resultJ)) {
-				AFB_ERROR("Metrics were sent but not done, an error happens. Details: %s", json_object_to_json_string(call_resultJ));
+			if(AFB_ServiceSync(apiHandle, "garner", "write", metrics2send, &call_resultJ)) {
+				AFB_ApiError(apiHandle, "Metrics were sent but not done, an error happens. Details: %s", json_object_to_json_string(call_resultJ));
 			}
 		}
 	}
 	else {
-		AFB_ERROR("Empty response. Request results was:\n%s", result);
+		AFB_ApiError(apiHandle, "Empty response. Request results was:\n%s", result);
 	}
 }
 
 static void influxdb_read_curl_cb(void *closure, int status, CURL *curl, const char *result, size_t size)
 {
+	if(!closure)
+		return;
+	AFB_ApiT apiHandle = (AFB_ApiT)closure;
 	long rep_code = curl_wrap_response_code_get(curl);
 	switch(rep_code) {
 		case 200:
-			AFB_DEBUG("Read correctly done");
-			forward_to_garner(result, size);
+			AFB_ApiDebug(apiHandle, "Read correctly done");
+			forward_to_garner(apiHandle, result, size);
 			break;
 		case 400:
-			AFB_ERROR("Unacceptable request. %s", result);
+			AFB_ApiError(apiHandle, "Unacceptable request. %s", result);
 			break;
 		case 401:
-			AFB_ERROR("Invalid authentication. %s", result);
+			AFB_ApiError(apiHandle, "Invalid authentication. %s", result);
 			break;
 		default:
-			AFB_ERROR("Unexptected behavior. %s", result);
+			AFB_ApiError(apiHandle, "Unexptected behavior. %s", result);
 			break;
 	}
 }
 
-static CURL *make_curl_query_get(const char *url)
+static CURL *make_curl_query_get(AFB_ApiT apiHandle, const char *url)
 {
 	CURL *curl;
 	char *args[5];
@@ -179,7 +184,7 @@ static CURL *make_curl_query_get(const char *url)
 	args[4] = NULL;
 	length_now = asprintf(&now, "%lu", get_ts());
 
-	int rootdir_fd = afb_daemon_rootdir_get_fd();
+	int rootdir_fd = AFB_RootDirGetFD(apiHandle);
 	int fd_last_read = openat(rootdir_fd, "last_db_read", O_CREAT | O_RDWR, S_IRWXU);
 	if (fd_last_read < 0)
 		return NULL;
@@ -188,7 +193,7 @@ static CURL *make_curl_query_get(const char *url)
 	   else write the last timestamp */
 	if(read(fd_last_read, last_ts, sizeof(last_ts)) == 0) {
 		if(write(fd_last_read, now, length_now) != length_now)
-			AFB_ERROR("Error writing last_db_read file: %s\n", strerror( errno ));
+			AFB_ApiError(apiHandle, "Error writing last_db_read file: %s\n", strerror( errno ));
 	}
 	else {
 		strcat(query, " WHERE time >= ");
@@ -196,7 +201,7 @@ static CURL *make_curl_query_get(const char *url)
 		close(fd_last_read);
 		fd_last_read = openat(rootdir_fd, "last_db_read", O_TRUNC | O_RDWR);
 		if (write(fd_last_read, now, length_now) != length_now)
-			AFB_ERROR("Error writing last_db_read file: %s", strerror( errno ));
+			AFB_ApiError(apiHandle, "Error writing last_db_read file: %s", strerror( errno ));
 	}
 
 	args[3] = query;
@@ -208,33 +213,37 @@ static CURL *make_curl_query_get(const char *url)
 static int influxdb_read(sd_event_source *s, uint64_t usec, void *userdata)
 {
 	CURL *curl;
-	struct reader_args *a = NULL;
-	if(userdata)
-		a = (struct reader_args*)userdata;
-	else
+	struct reader_args *r_args = NULL;
+	CtlSourceT *source = NULL;
+	if(userdata) {
+		source = (CtlSourceT*)userdata;
+		r_args = (struct reader_args*)source->context;
+	}
+	else {
 		return ERROR;
+	}
 
 	char url[URL_MAXIMUM_LENGTH]; /* Safe limit for most popular web browser */
 
-	make_url(url, sizeof(url), a->host, a->port, "query");
-	curl = make_curl_query_get(url);
-	curl_wrap_do(curl, influxdb_read_curl_cb, NULL);
+	make_url(url, sizeof(url), r_args->host, r_args->port, "query");
+	curl = make_curl_query_get(source->api, url);
+	curl_wrap_do(curl, influxdb_read_curl_cb, (void*)source->api);
 
 	/* Reschedule next run */
-	sd_event_source_set_time(s, usec + a->delay);
+	sd_event_source_set_time(s, usec + r_args->delay);
 
 	return 0;
 }
 
-int influxdb_reader(void *args)
+CTLP_CAPI(read_from_influxdb, source, argsJ, eventJ)
 {
 	int err = 0;
 	uint64_t usec;
 	struct sd_event_source *evtSource = NULL;
 
 	/* Set a cyclic cb call each 1s to call the read callback */
-	sd_event_now(afb_daemon_get_event_loop(), CLOCK_MONOTONIC, &usec);
-	err = sd_event_add_time(afb_daemon_get_event_loop(), &evtSource, CLOCK_MONOTONIC, usec+1000000, 250, influxdb_read, args);
+	sd_event_now(AFB_GetEventLoop(source->api), CLOCK_MONOTONIC, &usec);
+	err = sd_event_add_time(AFB_GetEventLoop(source->api), &evtSource, CLOCK_MONOTONIC, usec+1000000, 250, influxdb_read, (void*)source);
 	if(!err)
 		err = sd_event_source_set_enabled(evtSource, SD_EVENT_ON);
 
diff --git a/src/plugins/influxdb-writer.c b/src/plugins/influxdb-writer.c
index c21f4fd..677bfd0 100644
--- a/src/plugins/influxdb-writer.c
+++ b/src/plugins/influxdb-writer.c
@@ -21,6 +21,35 @@
 
 #include "influxdb.h"
 
+void influxdb_write_curl_cb(void *closure, int status, CURL *curl, const char *result, size_t size)
+{
+	AFB_ReqT request = (AFB_ReqT)closure;
+	long rep_code = curl_wrap_response_code_get(curl);
+	switch(rep_code) {
+		case 204:
+			AFB_ReqDebug(request, "Request correctly written");
+			AFB_ReqSucess(request, NULL, "Request has been successfully writen");
+			break;
+		case 400:
+			AFB_ReqFail(request, "Bad request", result);
+			break;
+		case 401:
+			AFB_ReqFail(request, "Unauthorized access", result);
+			break;
+		case 404:
+			AFB_ReqFail(request, "Not found", result);
+			AFB_ReqNotice(request, "Attempt to create the DB '"DEFAULT_DB"'");
+			create_database(request);
+			break;
+		case 500:
+			AFB_ReqFailF(request, "Timeout", "Overloaded server: %s", result);
+			break;
+		default:
+			AFB_ReqFail(request, "Failure", "Unexpected behavior.");
+			break;
+	}
+}
+
 static size_t format_write_args(char *query, struct series_t *serie)
 {
 	char *ts;
@@ -59,36 +88,7 @@ static size_t format_write_args(char *query, struct series_t *serie)
 	return strlen(query);
 }
 
-void influxdb_write_curl_cb(void *closure, int status, CURL *curl, const char *result, size_t size)
-{
-	struct afb_req *req = (struct afb_req*)closure;
-	long rep_code = curl_wrap_response_code_get(curl);
-	switch(rep_code) {
-		case 204:
-			AFB_DEBUG("Request correctly written");
-			afb_req_success(*req, NULL, "Request has been successfully writen");
-			break;
-		case 400:
-			afb_req_fail(*req, "Bad request", result);
-			break;
-		case 401:
-			afb_req_fail(*req, "Unauthorized access", result);
-			break;
-		case 404:
-			afb_req_fail(*req, "Not found", result);
-			AFB_NOTICE("Attempt to create the DB '"DEFAULT_DB"'");
-			create_database();
-			break;
-		case 500:
-			afb_req_fail_f(*req, "Timeout", "Overloaded server: %s", result);
-			break;
-		default:
-			afb_req_fail(*req, "Failure", "Unexpected behavior.");
-			break;
-	}
-}
-
-CURL *make_curl_write_post(const char *url, json_object *metricsJ)
+CURL *make_curl_write_post(AFB_ApiT apiHandle, const char *url, json_object *metricsJ)
 {
 	CURL *curl = NULL;
 	size_t lpd = 0, len_write = 0, i = 0;
@@ -114,7 +114,7 @@ CURL *make_curl_write_post(const char *url, json_object *metricsJ)
 		memset(serie, 0, sizeof(struct series_t));
 
 		if(unpack_metric_from_api(json_object_array_get_idx(metricsArrayJ, i), serie)) {
-			AFB_ERROR("ERROR unpacking metric. %s", json_object_to_json_string(metricsArrayJ));
+			AFB_ApiError(apiHandle, "ERROR unpacking metric. %s", json_object_to_json_string(metricsArrayJ));
 			break;
 		}
 		else {
@@ -144,9 +144,36 @@ CURL *make_curl_write_post(const char *url, json_object *metricsJ)
 	return curl;
 }
 
-CURL *influxdb_write(const char* host, const char *port, json_object *metricJ)
+CURL *influxdb_write(AFB_ApiT apiHandle, const char* host, const char *port, json_object *metricJ)
 {
 	char url[URL_MAXIMUM_LENGTH]; /* Safe limit for most popular web browser */
 	make_url(url, sizeof(url), host, port, "write");
-	return make_curl_write_post(url, metricJ);
+	return make_curl_write_post(apiHandle, url, metricJ);
+}
+
+CTLP_CAPI(write_to_influxdb, source, argsJ, eventJ)
+{
+	AFB_ReqT request = source->request;
+	const char *port = NULL;
+	const char *host = NULL;
+	CURL *curl_request;
+
+	json_object *req_args = AFB_ReqJson(request),
+				*portJ = NULL,
+				*metric = NULL;
+
+	if(wrap_json_unpack(req_args, "{s?s,s?o,so!}",
+			"host", &host,
+			"port", &portJ,
+			"metric", &metric) || ! metric)
+		AFB_ReqFail(request, "Failed", "Error processing arguments. Miss metric\
+JSON object or malformed");
+	else
+		port = json_object_is_type(portJ, json_type_null) ?
+			NULL : json_object_to_json_string(portJ);
+
+	curl_request = influxdb_write(source->api, host, port, metric);
+	curl_wrap_do(curl_request, influxdb_write_curl_cb, request);
+
+	return 0;
 }
diff --git a/src/plugins/influxdb.c b/src/plugins/influxdb.c
index a98bd2b..3c94a1b 100644
--- a/src/plugins/influxdb.c
+++ b/src/plugins/influxdb.c
@@ -26,6 +26,50 @@
 #include "wrap-json.h"
 #include "../utils/list.h"
 
+CTLP_CAPI_REGISTER("influxdb");
+
+CTLP_ONLOAD(plugin, ret)
+{
+	int err = 0;
+	char *result;
+	size_t result_size;
+	CURL *request = curl_wrap_prepare_get("localhost:"DEFAULT_DBPORT"/ping",NULL, NULL);
+
+	struct reader_args r_args = {NULL, NULL, 1000000};
+	plugin->context = (void*)&r_args;
+
+	curl_wrap_perform(request, &result, &result_size);
+
+	if(curl_wrap_response_code_get(request) != 204) {
+		AFB_ApiError(plugin->api, "InfluxDB not reachable, please start it");
+		err = ERROR;
+	}
+
+	curl_easy_cleanup(request);
+	return err;
+}
+
+CTLP_CAPI(influxdb_ping, source, argsJ, eventJ)
+{
+	int ret = 0;
+	char *result;
+	size_t result_size;
+
+	CURL *curl_req = curl_wrap_prepare_get("localhost:"DEFAULT_DBPORT"/ping",NULL, NULL);
+
+	curl_wrap_perform(curl_req, &result, &result_size);
+
+	if(curl_wrap_response_code_get(curl_req) != 204) {
+		AFB_ApiError(source->api, "InfluxDB is offline.");
+		ret = ERROR;
+	}
+
+	curl_easy_cleanup(curl_req);
+
+	AFB_ApiNotice(source->api, "InfluxDB is up and running.");
+	return ret;
+}
+
 void concatenate(char* dest, const char* source, const char *sep)
 {
 	strncat(dest, sep, strlen(sep));
@@ -51,7 +95,7 @@ size_t make_url(char *url, size_t l_url, const char *host, const char *port, con
 }
 
 
-int create_database()
+int create_database(AFB_ReqT request)
 {
 	int ret = 0;
 	char *result;
@@ -62,18 +106,18 @@ int create_database()
 	post_data[0] = "q=CREATE DATABASE \""DEFAULT_DB"\"";
 	post_data[1] = NULL;
 
-	CURL *request = curl_wrap_prepare_post_unescaped("localhost:"DEFAULT_DBPORT"/query",NULL, " ", post_data);
-	curl_wrap_perform(request, &result, &result_size);
+	CURL *curl_req = curl_wrap_prepare_post_unescaped("localhost:"DEFAULT_DBPORT"/query",NULL, " ", post_data);
+	curl_wrap_perform(curl_req, &result, &result_size);
 
 	if(curl_wrap_response_code_get(request) != 200) {
-		AFB_ERROR("Can't create database.");
+		AFB_ReqError(request, "Can't create database.");
 		ret = ERROR;
 	}
 
-	curl_easy_cleanup(request);
+	curl_easy_cleanup(curl_req);
 
 	if(ret == 0)
-		AFB_NOTICE("Database '"DEFAULT_DB"' created");
+		AFB_ReqNotice(request, "Database '"DEFAULT_DB"' created");
 
 	return ret;
 }
diff --git a/src/plugins/influxdb.h b/src/plugins/influxdb.h
index ae40e77..ed05f97 100644
--- a/src/plugins/influxdb.h
+++ b/src/plugins/influxdb.h
@@ -19,6 +19,7 @@
 #define _INFLUXDB_H_
 
 #define _GNU_SOURCE
+#include "ctl-plugin.h"
 #include "wrap-json.h"
 #include "tsdb.h"
 #include "../utils/list.h"
@@ -34,7 +35,7 @@ struct series_t {
 	uint64_t timestamp;
 };
 
-int create_database();
+int create_database(AFB_ReqT request);
 
 int unpack_metric_from_api(json_object *m, struct series_t *serie);
 
diff --git a/src/plugins/tsdb.c b/src/plugins/tsdb.c
index 7e10a74..27ae067 100644
--- a/src/plugins/tsdb.c
+++ b/src/plugins/tsdb.c
@@ -18,31 +18,6 @@
 #include <time.h>
 #include "tsdb.h"
 
-int influxdb_ping()
-{
-	int ret = 0;
-	char *result;
-	size_t result_size;
-	CURL *request = curl_wrap_prepare_get("localhost:"DEFAULT_DBPORT"/ping",NULL, NULL);
-	curl_wrap_perform(request, &result, &result_size);
-
-	if(curl_wrap_response_code_get(request) != 204) {
-		AFB_ERROR("TimeSeries DB not reachable");
-		ret = ERROR;
-	}
-
-	curl_easy_cleanup(request);
-	return ret;
-}
-
-int db_ping()
-{
-	int ret = 0;
-	if(influxdb_ping() == 0) ret = INFLUX;
-
-	return ret;
-}
-
 uint64_t get_ts()
 {
 	struct timespec ts;
diff --git a/src/plugins/tsdb.h b/src/plugins/tsdb.h
index 437c5dc..8469ac0 100644
--- a/src/plugins/tsdb.h
+++ b/src/plugins/tsdb.h
@@ -18,9 +18,6 @@
 #ifndef _TSDB_H
 #define _TSDB_H
 
-#define AFB_BINDING_VERSION 2
-#include <afb/afb-binding.h>
-
 #include <json-c/json.h>
 #include "curl-wrap.h"
 
@@ -32,6 +29,7 @@
 #define URL_MAXIMUM_LENGTH 2047
 
 enum db_available {
+	NODB = 0,
 	INFLUX = 1,
 	GRAPHITE = 2,
 	OPENTSDB = 4
@@ -43,13 +41,6 @@ struct reader_args {
 	u_int32_t delay;
 };
 
-CURL *influxdb_write(const char* host, const char *port, json_object *metric);
-void influxdb_write_curl_cb(void *closure, int status, CURL *curl, const char *result, size_t size);
-
-int influxdb_reader(void *args);
-
-int db_ping();
-
 u_int64_t get_ts();
 
 #endif