Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>You can achieve these goals using App Engine backends (long-running, configurable, addressable, persistent servers):</p> <ul> <li><a href="https://developers.google.com/appengine/docs/python/backends/" rel="noreferrer">https://developers.google.com/appengine/docs/python/backends/</a></li> <li><a href="https://developers.google.com/appengine/docs/java/backends/" rel="noreferrer">https://developers.google.com/appengine/docs/java/backends/</a></li> </ul> <h3>Python implementation</h3> <ol> <li><p>Configure a backend to be both <em>public</em> and <em>dynamic</em></p> <pre><code># backends.yaml backends: - name: foo instances: 20 options: public, dynamic </code></pre></li> <li><p>In addition to deploying your app in usual way:</p> <pre><code>appcfg.py update . </code></pre> <p>remember to deploy you backend:</p> <pre><code>appcfg.py backends . update </code></pre></li> <li><p>For the initial connection, have your client use the non-instance specific backend hostname, e.g.:</p> <pre><code>foo.your_app_id.appspot.com </code></pre> <p>App Engine will route your request to available backend instance, after optionally starting a new backend instance.</p></li> <li><p>In the request handling code on the server, use the backends API to determine which instance is handling the request and return to the client a instance specific URL.</p> <pre><code>from google.appengine.api import backends import webapp2 class GetPersistentUrlHandler(webapp2.RequestHandler): def get(self): """Return the current backend's instance-specific URL.""" my_url = backends.get_url(instance=backends.get_instance()) self.response.write(my_url) app = webapp2.WSGIApplication([ ('/get_peristent_url', GetPersistentUrlHandler), ], debug=True) </code></pre></li> <li><p>Client makes subsequent connections to the instance specific backend URL:</p> <pre><code>http://3.foo.your_app_id.appspot.com </code></pre> <p><em>Note: when using https be sure to replace subdomain dots with <code>-dot-</code> in order to avoid SSL certificate issues.</em></p> <pre><code>https://3-dot-foo.your_app_id.appspot.com </code></pre></li> </ol> <h3>Limitations</h3> <ol> <li>Backends do not live forever and may be shutdown unexpectedly and without notice</li> <li>The number of backends your application can have is currently limited</li> </ol>
    singulars
    1. This table or related slice is empty.
    1. POHow do I implement server affinity or sticky sessions on App Engine?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USFred Sauer
    1. USFred Sauer
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow do I implement server affinity or sticky sessions on App Engine?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload