---
layout: base
---
<!--
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or more contributor license agreements.  See the NOTICE file
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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.
-->

{%- assign active_pages = site.array -%}
{%- assign active = page -%}

{%- for i in (1..10) -%}
  {%- assign active_pages = active_pages | push: active -%}
  {%- if active.nav-parent_id -%}
    {%- assign next = site.pages_by_language[page.language] | where: "nav-id" , active.nav-parent_id -%}
    {%- if next.size > 0 -%}
      {%- assign active = next[0] -%}
    {%- else -%}
      {%- break -%}
    {%- endif -%}
  {%- else -%}
    {%- break -%}
  {%- endif -%}
{%- endfor -%}

{% assign active_pages = active_pages | reverse %}

<ol class="breadcrumb">
{%- for p in active_pages %}
  {% capture title %}{% if p.nav-title %}{{ p.nav-title }}{% else %}{{ p.title }}{% endif %}{% endcapture -%}
  {%- if forloop.last == true %}
    <li class="active">{{ title }}</li>
  {%- elsif p.nav-show_overview %}
    <li><a href="{{ site.baseurl }}{{ p.url }}">{{ title }}</a></li>
  {%- else %}
    <li>{{ title }}</li>
  {%- endif -%}
{%- endfor %}
</ol>

<h1>{{ page.title }}{% if page.is_beta %} <span class="beta">Beta</span>{% endif %}</h1>
{% if site.show_outdated_warning %}
<div class="alert alert-danger" role="alert">
  {%- if page.language == "en" %}
    <strong>This documentation is for an out-of-date version of Apache Flink. We recommend you use <a href="https://ci.apache.org/projects/flink/flink-docs-stable/">the latest stable version</a>.</strong>
  {%- else if page.language == "zh" %}
    <strong>本文档是 Apache Flink 的旧版本。建议访问 <a href="https://ci.apache.org/projects/flink/flink-docs-stable/zh">最新的稳定版本</a>。</strong>
  {%- endif %}
</div>
{%- endif %}

{{ content }}

<div class="footer">
  <!--
  <a href="https://cwiki.apache.org/confluence/display/FLINK/Flink+Translation+Specifications" target="_blank">
    {% if page.language == "zh" %}
      想参与贡献翻译？
    {% else if page.language == "en" %}
      Want to contribute translation?
    {% endif %}
  </a>
  -->
</div>