R: getting chatty Java processes to STFU

I'm using rJava to speak to the Amazon Web Services Java API from inside of R. After some initial pain I have it working. But the API is VERY chatty and feedbacks to R a huge amount of info that is great for debugging, but now that my code works, I'd like to silence this info chatter. How would I go about getting rid of this chatter? I'm not even sure where to look. The API? rJava? A switch in R?

Any help in where to look would be appreciated. Here's an example of the info chatter:

R> result <- uploadS3File(clusterObject$s3TempDir, streamFile)
Dec 17, 2010 12:12:52 PM com.amazonaws.http.HttpClient execute
INFO: Sending Request: PUT https://rtmphgdfkoughcboh8kl.s3.amazonaws.com /stream.txt Headers: (Authorization: AWS AKIAIC2FRTLFVNIOTMAQ:E++Z54SQsgoAntZ7JAd6aWJ2ZVs=, Date: Fri, 17 Dec 2010 18:12:52 GMT, Content-Length: 255579, Content-MD5: pMFNOWPJswXpAEULjfOclw==, Content-Type: text/plain, ) 
Dec 17, 2010 12:12:53 PM com.amazonaws.http.HttpClient handleResponse
INFO: Received successful response: 200, AWS Request ID: FC4113F003FCF631
R>

Solution

Jeffrey Breen's answer pointed me in the right direction. I did some digging around on log4j and discovered, thanks to the AWS forum, that the Java AWS API does not come with log4j set up, but it's really really easy to add. All I had to do was add the file log4j-1.2.16.jar to my class path. Then I created a log4J.properties file using the examples in the API docs. Then I added the directory where I put my log4j.properties file to my classpath and it worked!

so my the first bit of my .onLoad() function looks like this:

.onLoad <- function(lib, pkg) {
    pathToSdk <- paste(system.file(package = "segue") , "/aws-java-sdk/", sep="")

    jarPaths <- c(paste(pathToSdk, "lib/aws-java-sdk-1.1.0.jar", sep=""),
                  paste(pathToSdk, "third-party/commons-logging-1.1.1/commons-logging-1.1.1.jar", sep=""),
                  paste(pathToSdk, "third-party/commons-httpclient-3.0.1/commons-httpclient-3.0.1.jar", sep=""),
                  paste(pathToSdk, "third-party/commons-codec-1.3/commons-codec-1.3.jar", sep=""),
                  paste(pathToSdk, "third-party/log4j-1.2.16.jar", sep=""),
                  paste(pathToSdk, "third-party/", sep="")
                  )
    .jpackage(pkg, morePaths=jarPaths)

  ## other stuff edited out

 }

and my log4j.properties file has this in it:

log4j.rootLogger=WARN, A1
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d [%t] %-5p %c -  %m%n

and my log4j.properties file is located in the third-party/ directory which you can see is in the classpath.