proguard configuration that we use to shrink a spring-mvc project that is deployed on appengine. our goal was to reduce startup time and improve the issues with cold startup. we used spring-mvc, velocity and JDO

gistfile1.yml

##---------------Begin: proguard configuration common for all Android apps ----------
-optimizationpasses 1
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-dontpreverify
-verbose
#-dump class_files.txt
#-printseeds seeds.txt
#-printusage unused.txt
#-printmapping mapping.txt
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

-allowaccessmodification
#-keepattributes *Annotation*

# Preserve the special static methods that are required in all enumeration classes.
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

#-keep public class * extends android.app.Activity

##---------------Begin: proguard configuration for allthecooks ----------
-ignorewarnings
-keepdirectories
#-dontshrink
#-dontoptimize

-keepattributes *Annotation*
-keep class com.yumyumlabs.** { *; }

-keepclassmembers class com.yumyumlabs.** { java.lang.Long id; }
-keepnames class com.yumyumlabs.** implements java.io.Serializable
-keep class com.mufumbo.server.**
-keep class org.machino.**

-keep class org.slf4j.Logger { *; }
-keep class * implements org.slf4j.Logger { *; }
-keep class org.slf4j.spi.LocationAwareLogger { *; }
-keep class org.slf4j.spi.LoggerFactoryBinder { *; }
-keep class * implements org.slf4j.spi.LocationAwareLogger { *; }
-keep class * implements org.slf4j.spi.LoggerFactoryBinder { *; }
-keep class org.slf4j.impl.Log4jLoggerAdapter { *; }
-keep class org.apache.log4j.Logger { *; }
-keep class org.apache.log4j.ConsoleAppender { *; }
-keep class org.apache.log4j.PatternLayout
-keep class org.apache.commons.logging.LogFactory { *; }



-keep class com.google.api.client.util.**
-keep class com.google.apphosting.utils.jetty.AppEngineWebAppContext { *; }
-keep class com.google.appengine.tools.development.DevAppEngineWebAppContext { *; }
-keep class org.mortbay.jetty.handler.ContextHandler { *; }
-keep class com.google.api.client.auth.**
-keep class com.google.api.client.auth.oauth2.TokenResponseException { *; }
-keep class com.google.api.client.http.** { *; }
-keep class com.google.api.client.json.** { *; }
-keep class com.google.api.client.util.** { *; }
-keep class com.google.api.server.spi.SystemServiceServlet
-keep class com.google.appengine.tools.mapreduce.MapReduceServlet
-keep class * extends com.google.api.server.spi.SystemServiceServlet
-keep class * extends javax.servlet.http.HttpServlet
-keep class * implements javax.servlet.ServletContext { *; }

-keepclassmembers class * implements java.io.Serializable {
    static final long serialVersionUID;
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    !static !transient <fields>;
    private void writeObject(java.io.ObjectOutputStream);
    private void readObject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}

-keep class com.google.common.base.** { *; }
-keep class com.google.common.collect.Lists { *; }
-keep class com.google.common.collect.Sets { *; }
-keep class com.google.common.collect.Multimap { *; }
-keep class com.google.common.collect.Multimaps { *; }
-keep class com.google.common.collect.Iterables { *; }



-keep class com.google.appengine.datanucleus.** { *; }
-keep class org.dom4j.**  { *; }
-keep class javax.jdo.datastore.DataStoreCache


-keep class javax.jdo.spi.JDOImplHelper { *; }
-keep class javax.jdo.annotations.** { *; }
-keep class java.util.BitSet { *; }
-keep class javax.jdo.**

-keep class org.datanucleus.api.jdo.** { *; }
-keep class org.datanucleus.api.jdo.JDOAdapter
-keep class org.datanucleus.api.jdo.metadata.JDOMetaDataManager { *; }
-keep class org.datanucleus.api.jdo.JDOPersistenceManagerFactory { *; }
-keep class org.datanucleus.util.NucleusLogger
-keep class org.datanucleus.util.Log4JLogger { *; }
-keep class org.datanucleus.cache.** { *; }
-keep class org.datanucleus.query.** { *; }
-keep class org.datanucleus.store.types.sco.simple.** { *; }
-keep class org.datanucleus.store.types.sco.backed.** { *; }
-keep class org.datanucleus.store.mapped.mapping.**
-keep class org.datanucleus.store.mapped.identifier.DN2IdentifierFactory { *; }
-keep class org.datanucleus.store.query.cache.SoftQueryDatastoreCompilationCache { *; }
-keep class org.datanucleus.store.query.cache.SoftQueryResultsCache { *; }

-keep class org.springframework.jndi.JndiPropertySource
-keep class org.springframework.jndi.JndiLocatorDelegate { *; }
-keep class org.springframework.context.** { *; }
-keep class org.springframework.format.support.** { *; }
-keep class org.springframework.ui.context.support.** { *; }
-keep class org.springframework.validation.** { *; }
-keep class org.springframework.http.**  { *; }
-keep class org.springframework.ui.velocity.** { *; }
-keep class org.springframework.web.bind.** { *; }
-keep class org.springframework.web.context.** { *; }
-keep class org.springframework.web.context.ContextLoaderListener { *; }
-keep class org.springframework.web.context.support.XmlWebApplicationContext { *; }
-keep class org.springframework.web.context.support.GenericWebApplicationContext { *; }
-keep class org.springframework.web.context.support.StaticWebApplicationContext { *; }
-keep class org.springframework.web.context.support.AbstractRefreshableWebApplicationContext { *; }
-keep class org.springframework.web.context.WebApplicationContext { *; }
-keep class org.springframework.web.filter.** { *; }
-keep class org.springframework.web.servlet.i18n.**
-keep class org.springframework.web.method.** { *; }
-keep class org.springframework.web.servlet.DispatcherServlet { *; }
-keep class org.springframework.web.servlet.config.**
-keep class org.springframework.web.servlet.support.*
-keep class org.springframework.web.servlet.theme.**
-keep class org.springframework.web.servlet.view.*
-keep class org.springframework.web.servlet.view.x**
-keep class org.springframework.web.servlet.view.velocity.**  { *; }
-keep class org.springframework.web.util.** { *; }
-keep class org.springframework.web.view.*
-keep class * implements org.springframework.web.context.ConfigurableWebApplicationContext { *; }
-keep class * implements org.springframework.context.ApplicationListener { *; } 
-keep class * extends org.springframework.web.context.support.XmlWebApplicationContext { *; }

-keep class * extends org.springframework.web.servlet.DispatcherServlet { *; }
-keep class org.springframework.beans.factory.** { *; }
-keep class org.apache.velocity.runtime.directive.** { *; }
-keep class org.apache.velocity.runtime.ParserPoolImpl
-keep class org.reflections.spring.**
-keep class * implements javax.servlet.FilterChain { *; }


-keepclassmembers class * { 
    @org.springframework.beans.factory.annotation.Autowired *; 
    @org.springframework.beans.factory.annotation.Qualifier *; 
    @org.springframework.beans.factory.annotation.Value *; 
    @org.springframework.beans.factory.annotation.Required *;
    @org.springframework.context.annotation.Bean *;
    @javax.annotation.PostConstruct *;
    @javax.annotation.PreDestroy *;
    @org.aspectj.lang.annotation.AfterReturning *;
    @org.aspectj.lang.annotation.Pointcut *;
    @org.aspectj.lang.annotation.AfterThrowing *;
    @org.aspectj.lang.annotation.Around *;
}
-keep @org.springframework.stereotype.Service class *
-keep @org.springframework.stereotype.Controller class *
-keep @org.springframework.stereotype.Component class *
-keep @org.springframework.stereotype.Repository class *
-keep @org.springframework.cache.annotation.EnableCaching class *
-keep @org.springframework.context.annotation.Configuration class *
             


-keep class org.apache.commons.collections.ExtendedProperties { *; }
-keep class org.apache.commons.collections.map.LRUMap { *; }
-keep class org.apache.commons.lang.StringUtils { *; }
-keep class org.apache.commons.lang.text.StrBuilder { *; }
-keep class org.apache.commons.logging.Log { *; }
-keep class org.apache.commons.lang.StringEscapeUtils { *; }

-keep class org.apache.velocity.runtime.RuntimeInstance { *; }
-keep class org.apache.velocity.tools.generic.NumberTool { *; }
-keep class org.apache.velocity.tools.generic.DateTool { *; }
-keep class org.apache.velocity.tools.generic.FieldTool { *; }
-keep class org.apache.velocity.tools.generic.MathTool { *; }
-keep class org.apache.velocity.tools.generic.EscapeTool { *; }
-keep class org.apache.velocity.runtime.log.CommonsLogLogChute
-keep class org.apache.velocity.runtime.resource.ResourceManagerImpl
-keep class org.apache.velocity.runtime.resource.ResourceCacheImpl
-keep class org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
-keep class org.apache.velocity.tools.view.WebappResourceLoader
-keep class org.apache.velocity.app.VelocityEngine { *; }
-keep class org.apache.velocity.runtime.directive.Stop { *; }
-keep class org.apache.velocity.runtime.directive.Define { *; }

-keep class com.googlecode.htmlcompressor.** { *; }

-keep class org.apache.lucene.index.IndexWriterConfig
-keep class org.apache.lucene.index.IndexReader { *; }
-keep class org.apache.lucene.analysis.tokenattributes.**

-dontwarn com.yumyumlabs.web.controllers.auth.AuthController

-keep class org.apache.lucene.util.RamUsageEstimator

-dontwarn com.google.apphosting.api.ReflectionUtils
-dontwarn sun.misc.Unsafe

-keep class com.google.gson.internal.UnsafeAllocator
-keep class com.google.gson.internal.UnsafeAllocator { java.lang.Object theUnsafe; }

-dontwarn org.tartarus.snowball.**
-dontnote

-keepattributes Signature,RuntimeVisibleAnnotations,AnnotationDefault

##---------------Begin: proguard configuration for Gson  ----------
# Gson uses generic type information stored in a class file when working with fields. Proguard
# removes such information by default, so configure it to keep all of it.
-keepattributes Signature

# For using GSON @Expose annotation
#-keepattributes *Annotation*

# Gson specific classes
-keep class sun.misc.Unsafe { *; }
-keep class com.google.gson.stream.** { *; }

-keep class com.google.gson.internal.**

# Application classes that will be serialized/deserialized over Gson
# -keep class com.google.gson.examples.android.model.** { *; }

##---------------End: proguard configuration for Gson  ----------