[GitHub] [flink-statefun] tzulitai commented on a change in pull request #87: Document and Cleanup State Bootstrap API

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tzulitai commented on a change in pull request #87: Document and Cleanup State Bootstrap API 
URL: https://github.com/apache/flink-statefun/pull/87#discussion_r401380362
 
 

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 File path: docs/deployment-and-operations/state-bootstrap.md
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+---
+title: State Bootstrapping
+nav-id: bootstrapping
+nav-pos: 4
+nav-title: State Bootstrapping
+nav-parent_id: deployment-and-ops
+---
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you 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.
+-->
+
+Often times applications require some intial state provided by historical data in a file, database, or other system.
+Because state is managed by Apache Flink's snapshotting mechanism, writing the intial state into a [savepoint](https://ci.apache.org/projects/flink/flink-docs-stable/ops/state/savepoints.html) that can be used to start the Job.
+Users can bootstrap initial state for Stateful Functions applications using Flink's [state processor api](https://ci.apache.org/projects/flink/flink-docs-release-1.10/dev/libs/state_processor_api.html) and a ``StatefulFunctionSavepointCreator``.
+
+To get started with the state processor api, include the following library in your application.
+
+{% highlight xml %}
+<dependency>
+  <groupId>org.apache.flink</groupId>
+  <artifactId>statefun-flink-state-processor</artifactId>
+  <version>{{ site.version }}</version>
+</dependency>
+<dependency>
+  <groupId>org.apache.flink</groupId>
+  <artifactId>flink-state-processor-api_{{ site.scala_version }}</artifactId>
+  <version>{{ site.flink_version }}</version>
+</dependency>
+{% endhighlight %}
+
+<div class="alert alert-info">
+  <strong>Attention:</strong> The savepoint creator currently only supports initializing the state for Java modules.
+</div>
+
+* This will be replaced by the TOC
+{:toc}
+
+## State Bootstrap Function
+
+A ``StateBootstrapFunction`` defines how to bootstrap state for a ``StatefulFunction`` instance with a given input.
+
+Each bootstrap functions instance directly corresponds to a ``StatefulFunction`` type.
+Likewise, each instance is uniquely identified by an address, represented by the type and id of the function being bootstrapped.
+Any state that is persisted by a bootstrap functions instance will be available to the corresponding live StatefulFunction instance having the same address.
 
 Review comment:
   ```suggestion
   Any state that is persisted by a bootstrap functions instance will be available to the corresponding live ``StatefulFunction`` instance having the same address.
   ```

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