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were erroneously converting too many to FileNotFound, which was confusing. Also,
changes a couple of places where blob writes were non-fatal to make them fatal.

Log better error messages when we get exceptions from Blobstore. Previously we
were erroneously converting too many to FileNotFound, which was confusing. Also,
changes a couple of places where blob writes were non-fatal to make them fatal.

components/build.xml
Improved the dependency checking for the ai.apt task. This solves the problem
where changing a Java file in the annotations, common, or scripts package, or
changing a .txt file in scripts/templates did not cause the annotation
processor targets to be re-built.

build-common.xml:
Improved the dependency checking for the ai.javac task. This solves the problem
where changing a "public static final" variable in one Java file did not cause
another Java file that uses the variable to be recompiled.
Changed the ai.javac presetdef to a macrodef so it can run a <depend> task
before the <javac> task.

appengine/build.xml:
In the AiServerLib ai.javac task, exclude AiServerLib.jar from the classpath
to prevent the dependency checking from thinking that the code always needs to
be recompiled.

buildserver/build.xml:
In the BuildServer ai.javac task, exclude BuildServer.jar from the classpath
to prevent the dependency checking from thinking that the code always needs to
be recompiled.

JSONUtilTest.java:
Encoded all non-ascii characters as \uXXXX so that this file can be compiled
with javac option encoding=utf-8.

presumably compilation) more efficient.

The default limit is 10, but this can be overridden with the command line
option --maxSimultaneousBuilds. When the build server is at maximum capacity,
it will respond immediately to any additional build-all-from-zip-async requests
with response code 503 (service unavailable). According to rfc2616, section 10,
503 means "The server is currently unable to handle the request due to a
temporary overloading or maintenance of the server. The implication is that
this is a temporary condition which will be alleviated after some delay."

Added NonQueuingExecutor.java and NonQueuingExecutorTest.java

Modified YoungAndroidProjectService (appengine server code) so that if the
response code for a build-all-from-zip-async request is not 200 (OK), it will
include the response code in the RpcResult that it sends back to the client
code.

Modified BuildCommand (appengine client code) so that if the RpcResult from the
server contains the response code 503, it shows the message "The build server
is currently busy. Please try again in a few minutes." in yellow at the top of
the page.

Modified WaitForBuildResultCommand (appengine client code) so that it doesn't
print a different date/time each time it updates the debugger messages.

Other changes to BuildServer.java:
The command line options are now processed in the main method.
Added --maxSimultaneousBuilds command line option.
Added support for two new requests: buildserver/health and buildserver/vars.
buildserver/health simply returns "ok" if the build server is alive.
buildserver/vars returns a list of helpful values related to runtime, OS,
memory, build requests, and build tasks.

Enable all GWT client permuations to be built by commenting out the lines that specify specific clients.

build.xml
Added YailGenerator target to appinventor/buildserver/build.xml.
In BuildServer target, added task to copy YailGenerate.jar to the build/classes/files
directory so it can be loaded as a resource at runtime.
In CopyToRunLibDir, removed fileset entry that copied OpenBlocks.jar to the
build/run/lib directory. The buildserver no longer needs it there.

BuildServer.java:
Fixed problems where temp files were not being deleted.
Fixed problem in buildAllFromZipFileAsync where the FileInputStream for the
outputZip was never closed.
Added code to print out the amount of memory being used after each build.

ProjectBuilder.java:
Launch the YailGenerator as a separate process. The YailGenerator has a memory
leak and by launching it as a separate process, the buildserver process doesn't
leak memory. Added static inner class YailGenerationException.java.

Result.java:
Added constant int GENERAL_FAILURE with value 1 and use it instead of ~SUCCESS.
This matches what the appengine client code (in WaitForBuildResultCommand.java)
expects for a general build failure value.

YailGenerator.java:
Moved YailGenerator.java from
appinventor/buildserver/src/com/google/appinventor/buildserver to
appinventor/buildserver/src/com/google/appinventor/yailgenerator.
Updated package statement.

YailGenerationException.java:
Removed unneeded formName field, getFormName method, and constructor with
formName argument from the blockslib exception class YailGenerationException.
(appinventor/blockslib/src/openblocks/yacodeblocks/YailGenerationException.java)

fixing issue 26: warning users if they are running a version of App Engine
earlier than 1.6.2, which will have the fix for the problem with blobs on
local dev servers.

Also converted tab to space in appengine-web.xml

build server (stdout).

Include the Mercurial build id in the CrashReport extra info.

Added java class MercurialBuildId, which is generated during the ant
build from a template file called MercurialBuildId.template and the
results of executing "hg id -n -i".

Made a new target in common/build.xml called CommonVersion, which
builds CommonVersion.jar and CommonVersion-gwt.jar. These jars contain
classes named AppInventorFeatures and MercurialBuildId. These jars
have no external dependencies and can be used on Java 5.

Moved AppInventorFeatures from CommonUtils.jar (which contains some
other classes that require Java 6) to CommonVersion.jar so that it
can be used by any part of App Inventor, including the blocks editor
running on Java 5.

Specifically, instead of being non-cacheable (no-store), they can be
privately cached but must be revalidated by comparing server-side the
date of the prior response with the date of the last build.

Changed behavior so that if build date cannot be determined, the
response payload cannot be cached at all.

Removed unneeded session-id cookie code (http://code.google.com/p/app-inventor/issues/detail?id=50).

Removed unneeded session-id cookie code (http://code.google.com/p/app-inventor/issues/detail?id=50).

MockNonVisibleComponent.  This is external issue 53:
http://code.google.com/p/app-inventor/issues/detail?id=53

Specifically, I corrected directory names, improved formatting, and
added links, including adding the public GWT Javadoc link to the
ant javadoc task.

While making the changes, I fixed an unrelated Javadoc warning
in WorkspaceController.java.