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Began work on exporting code snippets from docs
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‎dump/LogFilterImpl.java

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package mysite.server;
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import java.io.IOException;
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import java.util.logging.Logger;
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import javax.servlet.Filter;
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import javax.servlet.FilterChain;
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import javax.servlet.FilterConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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public class LogFilterImpl implements Filter {
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private FilterConfig filterConfig;
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private static final Logger log = Logger.getLogger(LogFilterImpl.class.getName());
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public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain)
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throws IOException, ServletException {
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log.warning("Log filter processed a " + getFilterConfig().getInitParameter("logType")
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+ " request");
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filterChain.doFilter(request, response);
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}
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public FilterConfig getFilterConfig() {
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return filterConfig;
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}
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public void init(FilterConfig filterConfig) {
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this.filterConfig = filterConfig;
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}
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public void destroy() {}
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}

‎dump/appconfig.xml

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// [START pagespeed_example]
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<pagespeed>
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<domain-to-rewrite>*.cdn.myapp.com</domain-to-rewrite>
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<domain-to-rewrite>www.flickr.com</domain-to-rewrite>
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<url-blacklist>http://*/*.svg</url-blacklist>
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<url-blacklist>http://secure.foo.com/*</url-blacklist>
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<enabled-rewriter>CollapseWhitespace</enabled-rewriter>
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<disabled-rewriter>CombineJs</disabled-rewriter>
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<disabled-rewriter>ProxyImages</disabled-rewriter>
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</pagespeed>
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</appengine-web-app>
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// [END pagespeed_example]
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// [START custom_error_example]
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<static-error-handlers>
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<handler file="default_error.html" />
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<handler file="over_quota.html" error-code="over_quota" />
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</static-error-handlers>
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// [END custom_error_example]
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// [START expiration_example]
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<static-files>
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<include path="/**.png" expiration="4d 5h" />
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</static-files>
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// [END expiration_example]
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// [START expiration_example_yaml]
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static_files:
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- include: /**.png
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expiration: 4d 5h
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// [END expiration_example_yaml]
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// [START static_codesample_xml]
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<static-files>
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<include path="/**.png" />
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<exclude path="/data/**.png" />
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// [END static_codesample_xml]
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// [START static_codesample_yaml]
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static_files:
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- include: /**.png
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- exclude: /data/**.png
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// [END static_codesample_yaml]
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// [START resource_codesample_xml]
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<resource-files>
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<include path="/**.xml" />
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<exclude path="/feeds/**.xml" />
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// [END resource_codesample_xml]
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// [START resource_codesample_yaml]
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resource_files:
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- include: /**.xml
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- exclude: /feeds/**.xml
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// [END resource_codesample_yaml]
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//[START header_codesample_xml]
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<static-files>
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<include path="/my_static-files" >
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<http-header name="Access-Control-Allow-Origin" value="http://example.org" />
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</include>
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</static-files>
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//[END header_codesample_xml]
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//[START header_codesample_yaml]
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static_files:
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- include: /static/*
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http_headers:
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Access-Control-Allow-Origin: http://example.org
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//[END header_codesample_yaml]
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//[START mapper_codesample_yaml]
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handlers:
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- url: /red/*
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servlet: mysite.server.TeamServlet
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init_params:
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teamColor: red
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bgColor: "#CC0000"
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name: redteam
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- url: /blue/*
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servlet: mysite.server.TeamServlet
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init_params:
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teamColor: blue
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bgColor: "#0000CC"
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name: blueteam
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- url: /register/*
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jsp: /register/start.jsp
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- url: /*.special
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filter: mysite.server.LogFilterImpl
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init_params:
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logType: special
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//[END mapper_codesample_yaml]
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//[START environment_variables]
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<system-properties>
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<property name="myapp.maximum-message-length" value="140" />
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<property name="myapp.notify-every-n-signups" value="1000" />
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<property name="myapp.notify-url" value="http://www.example.com/signupnotify" />
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</system-properties>
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<env-variables>
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<env-var name="DEFAULT_ENCODING" value="UTF-8" />
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</env-variables>
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//[END environment_variables]
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//[START environment_variables_yaml]
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system_properties:
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myapp.maximum-message-length: 140
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myapp.notify-every-n-signups: 1000
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myapp.notify-url: http://www.example.com/signupnotify
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env_variables:
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DEFAULT_ENCODING: UTF-8
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context_params:
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rack.env: production
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//[END environment_variables_yaml]
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//[START inbound_services]
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<inbound-services>
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<service>mail</service>
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<service>warmup</service>
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</inbound-services>
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//[END inbound_services]
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//[START admin_console_custom_pages]
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<admin-console>
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<page name="Blog Comment Admin" url="/blog/admin/comments" />
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<page name="Create a Blog Post" url="/blog/admin/newentry" />
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</admin-console>
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//[END admin_console_custom_pages]
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//[START about_app_yaml_example]
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application: myapp
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version: alpha-001
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runtime: java
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api_version: 1
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handlers:
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- url: /admin/*
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login: admin
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//[END about_app_yaml_example]
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//[START minimal_appengine_web_xml]
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<?xml version="1.0" encoding="utf-8"?>
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<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
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<application>_your_app_id_</application>
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<version>alpha-001</version>
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<threadsafe>true</threadsafe>
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</appengine-web-app>
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//[END minimal_appengine_web_xml]
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//[START secure_handler_yaml]
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handlers:
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- url: /youraccount/*
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login: required
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secure: always
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//[END secure_handler_yaml]
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//[START servlet_listeners]
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listeners:
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- com.example.MyListener
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- com.example.MyOtherListener
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//[END servlet_listeners]
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//[START login_example_yaml]
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handlers:
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- url: /profile/*
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login: required
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- url: /admin/*
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servlet: com.example.AdminServlet
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login: admin
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//[END login_example_yaml]
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//[START welcome_files]
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welcome_files:
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- index.jsp
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- index.html
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//[END welcome_files]
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//[START load_on_startup]
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<servlet>
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<servlet-name>my-servlet</servlet-name>
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<servlet-class>com.company.MyServlet</servlet-class>
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<load-on-startup>1</load-on-startup>
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</servlet>
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//[END load_on_startup]
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//[START ServletContextListener]
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<listener>
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<listener-class>com.company.MyListener</listener-class>
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</listener>
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//[END ServletContextListener]
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//[START listener_filter]
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public class MyListener implements ServletContextListener {
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public void contextInitialized(ServletContextEvent event) {
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// This will be invoked as part of a warmup request, or the first user
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// request if no warmup request was invoked.
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}
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public void contextDestroyed(ServletContextEvent event) {
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// App Engine does not currently invoke this method.
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}
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}
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//[END listener_filter]
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//[START custom_warmup_servlet]
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<servlet>
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<servlet-name>_ah_warmup</servlet-name>
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<servlet-class>com.company.MyWarmupServlet</servlet-class>
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//[END custom_warmup_servlet]
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//[START warmup_yaml]
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inbound_services:
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- xmpp_message
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- mail
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//[END warmup_yaml]
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//[START custom_xml_output]
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web_xml: |
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<error-page>
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<error-code>500</error-code>
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<location>/errors/servererror.jsp</location>
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</error-page>
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//[END custom_xml_output]

‎dump/appidentity.java

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// [START versioned_hostnames]
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public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
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resp.setContentType("text/plain");
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Environment env = ApiProxy.getCurrentEnvironment();
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resp.getWriter().println("default_version_hostname: "
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+ env.getAttributes().get("com.google.appengine.runtime.default_version_hostname"));
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}
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// [END versioned_hostnames]
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// [START asserting_identity_to_Google_APIs]
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import com.google.appengine.api.appidentity.AppIdentityService;
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import com.google.appengine.api.appidentity.AppIdentityServiceFactory;
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import java.io.OutputStreamWriter;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.util.ArrayList;
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// Note that any JSON parser can be used; this one is used for illustrative purposes.
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import org.json.JSONObject;
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import org.json.JSONTokener;
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public String createShortUrl(String longUrl) throws Exception {
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try {
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ArrayList<String> scopes = new ArrayList<String>();
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scopes.add("https://www.googleapis.com/auth/urlshortener");
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AppIdentityService appIdentity = AppIdentityServiceFactory.getAppIdentityService();
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AppIdentityService.GetAccessTokenResult accessToken = appIdentity.getAccessToken(scopes);
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// The token asserts the identity reported by appIdentity.getServiceAccountName()
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JSONObject request = new JSONObject();
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request.put("longUrl", longUrl);
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URL url = new URL("https://www.googleapis.com/urlshortener/v1/url?pp=1");
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HttpURLConnection connection = (HttpURLConnection) url.openConnection();
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connection.setDoOutput(true);
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connection.setRequestMethod("POST");
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connection.addRequestProperty("Content-Type", "application/json");
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connection.addRequestProperty("Authorization", "Bearer " + accessToken.getAccessToken());
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OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
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request.write(writer);
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writer.close();
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if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
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// Note: Should check the content-encoding.
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JSONTokener response_tokens = new JSONTokener(connection.getInputStream());
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JSONObject response = new JSONObject(response_tokens);
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return (String) response.get("id");
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} else {
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throw new Exception();
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}
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} catch (Exception e) {
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// Error handling elided.
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throw e;
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}
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}
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// [END asserting_identity_to_Google_APIs]

‎dump/backends.java

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// [START shutdown_1]
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LifecycleManager.getInstance().setShutdownHook(new ShutdownHook() {
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public void shutdown() {
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LifecycleManager.getInstance().interruptAllRequests();
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}
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});
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// [END shutdown_1]
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// [START shutdown_2]
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while (haveMoreWork() &&
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!LifecycleManager.getInstance().isShuttingDown()) {
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doSomeWork();
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saveState();
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}
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// [END shutdown_2]
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// [START addressing_backends]
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import com.google.appengine.api.backends.BackendService;
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import com.google.appengine.api.backends.BackendServiceFactory;
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BackendService backendsApi = BackendServiceFactory.getBackendService();
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// Get the backend handling the current request.
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String currentBackendName = backendsApi.getCurrentBackend();
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// Get the backend instance handling the current request.
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int currentInstance = backendsApi.getCurrentInstance();
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// [END addressing_backends]
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// [START background_threads]
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import com.google.appengine.api.ThreadManager;
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import java.util.concurrent.AtomicLong;
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AtomicLong counter = new AtomicLong();
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Thread thread = ThreadManager.createBackgroundThread(new Runnable() {
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public void run() {
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try {
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while (true) {
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counter.incrementAndGet();
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Thread.sleep(10);
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}
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} catch (InterruptedException ex) {
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throw new RuntimeException("Interrupted in loop:", ex);
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}
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}
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});
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thread.start();
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// [END background_threads]

‎dump/backends.xml

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<!-- [START backends] -->
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<backends>
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<backend name="memdb">
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<class>B8</class>
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<instances>5</instances>
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</backend>
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<backend name="worker">
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<options>
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<fail-fast>true</fail-fast>
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</options>
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</backend>
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<backend name="cmdline">
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<options>
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<dynamic>true</dynamic>
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</options>
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</backend>
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</backends>
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<!-- [END backends] -->
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<!-- Since this page does not have executable code, this section is separate
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rather than nested, as nesting would have significantly complicated the
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include regions. -->
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<!-- [START class-example] -->
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<backends>
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<backend name="cmdline">
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<class>B4</class>
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</backend>
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</backends>
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<!-- [END class-example] -->

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