<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!--NewPage--> <HTML> <HEAD> <!-- Generated by javadoc (build 1.6.0-google-v4) on Fri Oct 07 18:15:14 PDT 2011 --> <TITLE> Overview </TITLE> <META NAME="date" CONTENT="2011-10-07"> <LINK REL ="stylesheet" TYPE="text/css" HREF="dev_javadoc.css" TITLE="Style"> <SCRIPT type="text/javascript"> function windowTitle() { if (location.href.indexOf('is-external=true') == -1) { parent.document.title="Overview"; } } </SCRIPT> <NOSCRIPT> </NOSCRIPT> </HEAD> <BODY BGCOLOR="white" onload="windowTitle();"> <HR> <!-- ========= START OF TOP NAVBAR ======= --> <A NAME="navbar_top"><!-- --></A> <A HREF="#skip-navbar_top" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_top_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Overview</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Package</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="overview-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR> </TABLE> </TD> <TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> </EM> </TD> </TR> <TR> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> PREV NEXT</FONT></TD> <TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="index.html?overview-summary.html" target="_top"><B>FRAMES</B></A> <A HREF="overview-summary.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="allclasses-noframe.html"><B>All Classes</B></A>'); } //--> </SCRIPT> <NOSCRIPT> <A HREF="allclasses-noframe.html"><B>All Classes</B></A> </NOSCRIPT> </FONT></TD> </TR> </TABLE> <A NAME="skip-navbar_top"></A> <!-- ========= END OF TOP NAVBAR ========= --> <HR> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> <B>Packages</B></FONT></TH> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/package-summary.html">com.google.appengine.api</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/appidentity/package-summary.html">com.google.appengine.api.appidentity</A></B></TD> <TD>The app identity API allows an App Engine app to sign an arbitrary string blob using an internally-generated, rotated private key.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/backends/package-summary.html">com.google.appengine.api.backends</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/blobstore/package-summary.html">com.google.appengine.api.blobstore</A></B></TD> <TD>The blobstore API provides management and persistent storage of large, immutable blobs.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/capabilities/package-summary.html">com.google.appengine.api.capabilities</A></B></TD> <TD>The capabilities API.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/channel/package-summary.html">com.google.appengine.api.channel</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/datastore/package-summary.html">com.google.appengine.api.datastore</A></B></TD> <TD>The datastore provides persistent storage for App Engine applications, used either directly or via the provided JDO or JPA interfaces.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/files/package-summary.html">com.google.appengine.api.files</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/images/package-summary.html">com.google.appengine.api.images</A></B></TD> <TD>This package provides facilities for the creation and manipulation of images by Java code.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/mail/package-summary.html">com.google.appengine.api.mail</A></B></TD> <TD>App Engine applications can send email messages on behalf of the app's administrators, or of authenticated users, using the standard <code>javax.mail</code> interface over this low-level API.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/memcache/package-summary.html">com.google.appengine.api.memcache</A></B></TD> <TD>The memcache API provides access to fast but unreliable data storage, which may also be accessed via the <A href= "https://jsr-107-interest.dev.java.net/javadoc/javax/cache/package-summary.html"> JCache API</A>.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/oauth/package-summary.html">com.google.appengine.api.oauth</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/prospectivesearch/package-summary.html">com.google.appengine.api.prospectivesearch</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/quota/package-summary.html">com.google.appengine.api.quota</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/taskqueue/package-summary.html">com.google.appengine.api.taskqueue</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/urlfetch/package-summary.html">com.google.appengine.api.urlfetch</A></B></TD> <TD>The URL Fetch service can be used to make HTTP and HTTPS requests of other servers on the internet.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/users/package-summary.html">com.google.appengine.api.users</A></B></TD> <TD>The <CODE>UserService</CODE> provides facilities to check whether a user has authenticated using their Google Account, retrieve their email address, and check whether they are an administrator for this application.</TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/utils/package-summary.html">com.google.appengine.api.utils</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/appengine/api/xmpp/package-summary.html">com.google.appengine.api.xmpp</A></B></TD> <TD> </TD> </TR> <TR BGCOLOR="white" CLASS="TableRowColor"> <TD WIDTH="20%"><B><A HREF="com/google/apphosting/api/package-summary.html">com.google.apphosting.api</A></B></TD> <TD> </TD> </TR> </TABLE> <P> <HR> <!-- ======= START OF BOTTOM NAVBAR ====== --> <A NAME="navbar_bottom"><!-- --></A> <A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> <TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> <TR> <TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A NAME="navbar_bottom_firstrow"><!-- --></A> <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Overview</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Package</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="overview-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> 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