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README
Apache-2.0

Welcome to Apache Edgent!

Build Status

Apache Edgent is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Incubator PMC. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.

Apache Edgent is an open source programming model and runtime for edge devices that enables you to analyze data and events at the device.

Please join us by subscribing to the developer mailing list dev at edgent.incubator.apache.org. To subscribe, send an email to dev-subscribe at edgent.incubator.apache.org.

We want to build a community around Edgent for analytics at the edge, so welcome contributions to any aspect of Edgent including:

  • Feedback from use in IoT and other device environments.
  • Support for more device environments
  • Additional connectors to edge sensors or new message hubs
  • Analytics to be executed at the edge
  • Sample applications
  • Documentation
  • Testing
  • Bug fixing
  • ...

Please Get Involved!

Edgent is released under the Apache License Version 2.0

Edgent

Devices and sensors are everywhere. And more are coming online every day. You need a way to analyze all of the data coming from your devices, but it can be expensive to transmit all of the data from a sensor to your central analytics engine.

Edgent is an open source programming model and runtime for edge devices that enables you to analyze data and events at the device. When you analyze on the edge, you can:

  • Reduce the amount of data that you transmit to your analytics server
  • Reduce the amount of data that you store

An Edgent application uses analytics to determine when data needs to be sent to a back-end system for further analysis, action, or storage. For example, you can use Edgent to determine whether a system is running outside of normal parameters, such as an engine that is running too hot.

If the system is running normally, you don’t need to send this data to your back-end system; it’s an added cost and an additional load on your system to process and store. However, if Edgent detects an issue, you can transmit that data to your back-end system to determine why the issue is occurring or how to resolve the issue.

Edgent enables you to shift from a continuous flow of trivial data to an intermittent trickle of meaningful data. This is especially important when the cost of communication is high, such as when using a cellular network to transmit data, or when bandwidth is limited.

The following use cases describe the primary situations in which you would use Edgent:

  • Internet of Things (IoT): Analyze data on distributed edge devices and mobile devices to:
    • Reduce the cost of transmitting data
    • Provide local feedback at the devices
  • Embedded in an application server instance: Analyze application server error logs in real time without impacting network traffic
  • Server rooms and machine rooms: Analyze machine health in real time without impacting network traffic or when bandwidth is limited

Edge devices and back-end systems

You can send data from an Edgent application to your back-end system when you need to perform analysis that cannot be performed on the edge device, such as:

  • Running a complex analytic algorithm that requires more resources, such as CPU or memory, than are available on the edge device.
  • Maintaining large amounts of state information about a device, such as several hours worth of state information for a patient’s medical device.
  • Correlating data from the device with data from other sources, such as:
    • Weather data
    • Social media data
    • Data of record, such as a patient’s medical history or trucking manifests
    • Data from other devices

Edgent communicates with your back-end systems through the following message hubs:

  • MQTT – The messaging standard for IoT
  • IBM Watson IoT Platform – A cloud-based services that provides a device model on top of MQTT
  • Apache Kafka – An enterprise-level message bus
  • Custom message hubs

Your back-end systems can also use analytics to interact with and control edge devices. For example:

  • A traffic alert system can send an alert to vehicles that are heading towards an area where an accident occurred
  • A vehicle monitoring system can reduce the maximum engine revs to reduce the chance of failure before the next scheduled service if it detects patterns that indicate a potential problem

Runtime environments

Edgent has a language binding for Java. See JAVA SUPPORT for information about the supported Java environments.

Getting Started

See the Edgent website for more information on all aspects of Edgent including Getting Started.

For details about the Edgent sources and contributing to Edgent runtime development see DEVELOPMENT.md

Renamed from Apache Quarks

Apache Quarks was renamed to Apache Edgent.

See the [RELEASE_NOTES](RELEASE_NOTES] for change information if you are converting from "Apache Quarks".

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License. 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The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License. You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License. 5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions. 6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file. 7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License. 8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages. 9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS APPENDIX: How to apply the Apache License to your work. To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "{}" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright {yyyy} {name of copyright owner} 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. ====================================== APACHE EDGENT SUBCOMPONENTS: Apache Edgent source a includes one or more subcomponents with separate copyright notices and license terms. Your use of the source code for these components is subject to the terms and conditions of the following licenses. This product bundles d3-legend which is available under a separate license. console/servlets/src/main/webapp/js/ext/d3-legend/d3.legend.js https://gist.githubusercontent.com/ZJONSSON/3918369/raw/bf9bce6b68a3b70f87450f155436ca4a84af1ba4/d3.legend.js With Edgent specific modifications. License type: MIT Copyright (c) 2012 ziggy.jonsson.nyc@gmail.com Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ======================================

简介

Apache Edgent 是一种编程模型和具有微内核风格的运行时,可嵌入到网关和小型的物联网设备中 展开 收起
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