data

README

EdgeX Foundry Core Data Service

Core Data provides a centralized persistence facility for data readings collected by devices and sensors. Device services for devices and sensors that collect data, call on the Core Data service to store the device and sensor data on the edge system (such as in a gateway) until the data can be moved "north" and then exported to Enterprise and cloud systems.

Install and Deploy Native

Prerequisites

Serveral EdgeX Foundry services depend on ZeroMQ for communications by default. The easiest way to get and install ZeroMQ is to use or follow the following setup script: https://gist.github.com/katopz/8b766a5cb0ca96c816658e9407e83d00.

Note: Setup of the ZeroMQ library is not supported on Windows plaforms.

Installation and Execution

To fetch the code and build the microservice execute the following:

cd $GOPATH/src
go get github.com/edgexfoundry/edgex-go
cd $GOPATH/src/github.com/edgexfoundry/edgex-go
# pull the 3rd party / vendor packages
make prepare
# build the microservice
make cmd/core-data/core-data
# get to the core data microservice executable
cd cmd/core-data
# run the microservice (may require other dependent services to run correctly)
./core-data

Install and Deploy via Docker Container

This project has facilities to create and run Docker containers. A Dockerfile is included in the repo. Make sure you have already run make prepare to update the dependecies. To do a Docker build using the included Docker file, run the following:

Prerequisites

See https://docs.docker.com/install/ to learn how to obtain and install Docker.

Installation and Execution

cd $GOPATH/src
go get github.com/edgexfoundry/edgex-go
cd $GOPATH/src/github.com/edgexfoundry/edgex-go
# To create the Docker image
sudo make docker_core_data
# To create a containter from the image
sudo docker create --name "[DOCKER_CONTAINER_NAME]" --network "[DOCKER_NETWORK]" [DOCKER_IMAGE_NAME]
# To run the container
sudo docker start [DOCKER_CONTAINER_NAME]

Note - creating and running the container above requires Docker network setup, may require dependent containers to be setup on that network, and appropriate port access configuration (among other start up parameters). For this reason, EdgeX recommends use of Docker Compose for pulling, building, and running containers. See The Getting Started Guides for more detail.

Community

• Chat: https://edgexfoundry.slack.com
• Mainling lists: https://lists.edgexfoundry.org/mailman/listinfo

License

Apache-2.0

Documentation

Overview

******************************************************************************

• Copyright 2019 VMware Inc. *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2018 Dell Inc. *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2018 Dell Inc. *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2017 Dell Inc.
• Copyright (c) 2019 Intel Corporation *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2017 Dell Inc.
• Copyright (c) 2019 Intel Corporation *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2017 Dell Inc.
• Copyright (c) 2019 Intel Corporation *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2017 Dell Inc. *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2017 Dell Inc. *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2017 Dell Inc. *
• 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. ******************************************************************************

******************************************************************************

• Copyright 2017 Dell Inc. *
• 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. ******************************************************************************

Index

• Constants
• Variables
• func Main(ctx context.Context, cancel context.CancelFunc, router *mux.Router, ...)
• func NewCborReader(configuration *config.ConfigurationStruct) cborReader
• func NewJsonReader() jsonReader
• type Bootstrap
  • func NewBootstrap(router *mux.Router) *Bootstrap
  • func (b *Bootstrap) BootstrapHandler(ctx context.Context, wg *sync.WaitGroup, startupTimer startup.Timer, ...) bool
• type DeviceLastReported
• type DeviceServiceLastReported
• type ErrUnsupportedContentType
  • func (e ErrUnsupportedContentType) Error() string
• type EventReader
  • func NewRequestReader(request *http.Request, configuration *config.ConfigurationStruct) EventReader

Constants

const (
	SCRUB          = "scrub"
	SCRUBALL       = "scruball"
	COUNT          = "count"
	CHECKSUM       = "checksum"
	LABEL          = "label"
	DEVICEID_PARAM = "deviceId"
	UOMLABEL       = "uomlabel"
	UOMLABEL_PARAM = "uomLabel"
	LIMIT          = "limit"
	REMOVEOLD      = "removeold"
	AGE            = "age"
	START          = "start"
	END            = "end"
	TYPE           = "type"
	DEVICENAME     = "devicename"
	DEVICEID       = "deviceid"
	ID             = "id"
	NAME           = "name"
	NAMES          = "names"
	DEVICE         = "device"
	USAGE          = "usage"
)

const (
	ChecksumAlgoMD5    = "md5"
	ChecksumAlgoxxHash = "xxHash"
)

Variables

var ValueDescriptorUsageReadLimit = 1

ValueDescriptorUsageReadLimit limit of readings obtained for a given value descriptor to determine if the value descriptor is in use.

Functions

func Main

func Main(ctx context.Context, cancel context.CancelFunc, router *mux.Router, readyStream chan<- bool)

func NewCborReader

func NewCborReader(configuration *config.ConfigurationStruct) cborReader

NewCborReader creates a new instance of cborReader.

func NewJsonReader

func NewJsonReader() jsonReader

NewJsonReader creates a new instance of cborReader.

Types

type Bootstrap

type Bootstrap struct {
	// contains filtered or unexported fields
}

Bootstrap contains references to dependencies required by the BootstrapHandler.

func NewBootstrap

func NewBootstrap(router *mux.Router) *Bootstrap

NewBootstrap is a factory method that returns an initialized Bootstrap receiver struct.

func (*Bootstrap) BootstrapHandler

func (b *Bootstrap) BootstrapHandler(ctx context.Context, wg *sync.WaitGroup, startupTimer startup.Timer, dic *di.Container) bool

BootstrapHandler fulfills the BootstrapHandler contract and performs initialization needed by the data service.

type DeviceLastReported

type DeviceLastReported struct {
	DeviceName string
}

An event indicating that a given device has just reported some data

type DeviceServiceLastReported

type DeviceServiceLastReported struct {
	DeviceName string
}

An event indicating that the service associated with the device that just reported data is alive.

type ErrUnsupportedContentType

type ErrUnsupportedContentType struct {
	ContentType string
}

ErrUnsupportedContentType an error used when a request is received with an unsupported content type

func (ErrUnsupportedContentType) Error

func (e ErrUnsupportedContentType) Error() string

type EventReader

type EventReader interface {
	Read(reader io.Reader, ctx *context.Context) (models.Event, error)
}

EventReader unmarshals a request body into an Event type

func NewRequestReader

func NewRequestReader(request *http.Request, configuration *config.ConfigurationStruct) EventReader

NewRequestReader returns a BodyReader capable of processing the request body