mjsax commented on code in PR #18488:
URL: https://github.com/apache/kafka/pull/18488#discussion_r1911784754
##########
docs/streams/developer-guide/processor-api.html:
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@@ -67,42 +67,40 @@ <h2><a class="toc-backref" href="#id1">Overview</a><a
class="headerlink" href="#
<p><b>Tip</b></p>
<p class="last"><strong>Combining the DSL and the Processor
API:</strong>
You can combine the convenience of the DSL with the power
and flexibility of the Processor API as described in the
- section <a class="reference internal"
href="dsl-api.html#streams-developer-guide-dsl-process"><span class="std
std-ref">Applying processors and transformers (Processor API
integration)</span></a>.</p>
+ section <a class="reference internal"
href="dsl-api.html#streams-developer-guide-dsl-process"><span class="std
std-ref">Applying processors (Processor API integration)</span></a>.</p>
</div>
<p>For a complete list of available API functionality, see the <a
href="/{{version}}/javadoc/org/apache/kafka/streams/package-summary.html">Streams</a>
API docs.</p>
</div>
<div class="section" id="defining-a-stream-processor">
<span id="streams-developer-guide-stream-processor"></span><h2><a
class="toc-backref" href="#id2">Defining a Stream Processor</a><a
class="headerlink" href="#defining-a-stream-processor" title="Permalink to this
headline"></a></h2>
- <p>A <a class="reference internal"
href="../core-concepts.html#streams_processor_node"><span class="std
std-ref">stream processor</span></a> is a node in the processor topology that
represents a single processing step.
- With the Processor API, you can define arbitrary stream
processors that processes one received record at a time, and connect
- these processors with their associated state stores to compose
the processor topology.</p>
- <p>You can define a customized stream processor by implementing
the <code class="docutils literal"><span class="pre">Processor</span></code>
interface, which provides the <code class="docutils literal"><span
class="pre">process()</span></code> API method.
- The <code class="docutils literal"><span
class="pre">process()</span></code> method is called on each of the received
records.</p>
- <p>The <code class="docutils literal"><span
class="pre">Processor</span></code> interface also has an <code class="docutils
literal"><span class="pre">init()</span></code> method, which is called by the
Kafka Streams library during task construction
- phase. Processor instances should perform any required
initialization in this method. The <code class="docutils literal"><span
class="pre">init()</span></code> method passes in a <code class="docutils
literal"><span class="pre">ProcessorContext</span></code>
- instance, which provides access to the metadata of the
currently processed record, including its source Kafka topic and partition,
- its corresponding message offset, and further such
information. You can also use this context instance to schedule a punctuation
- function (via <code class="docutils literal"><span
class="pre">ProcessorContext#schedule()</span></code>), to forward a new record
as a key-value pair to the downstream processors (via <code class="docutils
literal"><span class="pre">ProcessorContext#forward()</span></code>),
- and to commit the current processing progress (via <code
class="docutils literal"><span
class="pre">ProcessorContext#commit()</span></code>).
- Any resources you set up in <code class="docutils literal"><span
class="pre">init()</span></code> can be cleaned up in the
- <code class="docutils literal"><span
class="pre">close()</span></code> method. Note that Kafka Streams may re-use a
single
- <code class="docutils literal"><span
class="pre">Processor</span></code> object by calling
- <code class="docutils literal"><span
class="pre">init()</span></code> on it again after <code class="docutils
literal"><span class="pre">close()</span></code>.</p>
- <p>
- The <code class="docutils literal"><span
class="pre">Processor</span></code> interface takes two sets of generic
parameters:
+ <p>A <a class="reference internal"
href="../core-concepts.html#streams_processor_node"><span class="std
std-ref">stream processor</span></a> is a node in the processor topology that
represents a single processing step.
Review Comment:
Just some whitespace formatting...
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