User guide

These samples demonstrate how to use AWS Flow
Framework. The following samples are included:
• HelloWorld – this sample includes a simple
workflow that calls an activity to print hello
world to the console. It shows the basic usage
of AWS Flow Framework, including defining
contracts, implementation of activities and work-
flow coordination logic and worker programs to
host them.
• Booking – shows an example workflow for mak-
ing a reservation, including flight and rental car.
• FileProcessing – shows a workflow for media
processing use case.The sample workflow
downloads a file from an S3 bucket, creates a
.zip file, and uploads that .zip file back to Amazon
S3. The sample uses the task routing feature.
• PeriodicWorkflow – shows how to create a
workflow that periodically executes an activity.
The workflow can run for extended periods;
hence, it uses the continue as new execution
feature.
• SplitMerge – the workflow in this sample pro-
cesses a large data set by splitting it up into
smaller data sets.The sample calculates the
average of a large set of numbers stored in a file
in Amazon S3.The smaller data sets are as-
signed to workers, and the results of processing
are merged to produce the final result.
• Deployment – the workflow in this sample shows
deployment of interdependent components.
• Cron – the workflow in this sample starts an
activity periodically based on a cron schedule.
• CronWithRetry – this is an enhanced version of
the Cron sample that uses the exponential retry
feature to retry the activity if it fails.
AwsFlowFramework
Building and Running the Samples using the
Command Line
The samples include Ant build scripts so that you can easily build and run them from the command line.
Each sample also contains a README file in HTML format that contains information specific to each
sample.
Tip
If you are browsing the sample code on GitHub, click the Raw button in the source code display
when viewing the README.html file for a sample. In raw mode, the HTML will render as intended
in your browser.
Prerequisites
Version v1.0.0
69
AWS SDK for Java Developer Guide
Building and Running the Samples using the Command
Line