Began work on exporting code snippets from docs

dump/LogFilterImpl.java

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

dump/appconfig.xml

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

dump/appidentity.java

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

dump/backends.java

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

dump/backends.xml

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