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-.. This work is licensed under a Creative Commons Attribution 4.0 International License.
-.. http://creativecommons.org/licenses/by/4.0
-
-.. _cdap-requirements:
-
-CDAP Component Requirements
-===========================
-
-This page contains information about CDAP app development in DCAE.
-
-Uploading your Jar File
------------------------
-
-The DCAE component specification has you input your ``jar_url``, the URL
-on Nexus to your Jar file. This DCAE controller deploys out of Nexus.
-You can upload your jar(s) using the following command, replacing NAME:
-
-::
-
- curl -v --user 'user:password' http://YOUR_NEXUS_RAW_REPO/NAME.jar --upload-file NAME.jar
-
-During the CLI Tool Usage, in your spec, supply
-``http://YOUR_NEXUS_RAW_REPO/NAME.jar`` as the JAR artifact URL.
-
-Policy Reconfiguration
-----------------------
-
-We support reconfiguration of both AppConfig and AppPreferences.
-
-For AppConfig, we support CDAPs “update” API to `reconfigure an application <http://docs.cask.co/cdap/current/en/reference-manual/http-restful-api/lifecycle.html#update-an-application%7D%7D>`_.
-
-For AppPreferences, we:
-
-1. Stop your programs
-
-2. Set the new preferences
-
-3. Start your programs
-
-At the time of writing, there is no way to update a CDAP application’s
-AppConfig or AppPreferences, without a restart, *and notify* the
-application. The latter is a future promised feature by CASK—the ability
-to update preferences and inform the application that something is
-changed (so it repulls). As CDAP currently stands however, given the
-above, if you are building a stateful application, you must persist your
-state often (e.g., to a CDAP dataset), as you may be restarted at any
-time with an updated configuration, or stopped&started at any time with
-updated preferences.
-
-Metrics
--------
-
-Metrics are pulled from your CDAP application on a periodic basis and
-(in the future: pushed to a central DCAE metric store, currently: just
-dropped). For this to be useful, your application should provide `metrics <http://docs.cask.co/cdap/current/en/admin-manual/operations/metrics.html>`_.
-While nothing in the DCAE runtime enforces that your CDAP application
-tracks metrics, your metrics (or lack thereof) will be visible in the
-DCAE dashboard and to operations.
-
-.. _dmaap-abstraction:
-
-Future DMaaP abstraction
-------------------------
-
-Shown below is our *vision* for how DMaaP is abstracted from component
-developers:
-
-.. figure:: ./images/dmdvision.png
-
-Today, this is a vision; it is not in place. Today, each CDAP app is
-built with built in assumptions about where they are getting their data
-from. Some CDAP apps have the built in assumption of a UEB feed. Some
-MR. Some DR. This becomes very difficult to orchestrate when each app in
-the catalog has built in data assumptions.
-
-The goal of this vision is to *decouple* the data plane from the
-analytics plane. Analytics should be agnostic to *how* they are
-receiving their data beyond “filesystem” or “HTTP”. Analytics developers
-shouldn’t have to worry about the data plane, that should be taken care
-of by the platform. They should be spending their time on the problem at
-hand—the analytic.
-
-This also allows each CDAP application to have a standard set of
-interfaces: HTTP and HDFS:
-
-.. figure:: ./images/io.png
-