Money Transfer

Demonstrates a simple Money Transfer in Temporal implemented in different languages.

The workflow is designed so that the "Happy Path" is one workflow and all other scenarios are implemented using a Dyanmic Workflow.

Scenarios currently implemented include

• Happy Path - everything works as intended
• Advanced Visibility - updates a Search Attribute (Step) as it progesses through the workflow
• Require Human in the Loop - Shows how to use a signal with timeouts if not approved in time
• API Downtime - Demonstrates an unreliable API (recovers after the 5th attempt)
• Bug in Workflow - Purposefully throws/raises an error (fix and redeploy the worker)
• Invalid Account - How to exit a workflow for business purposes (fail the workflow)

Running the Demo locally

Start Temporal Locally

temporal server start-dev

Create a Search Attribute

temporal operator search-attribute create --name Step --type Keyword

Start the UX

Next, start the UX which is written using the Java SDK

cd ui
./startlocalwebui.sh

Navigate to http://localhost:7000 in a web browser to interact with the UX

Start a worker

Now start a worker. You can choose to use the Java, Go or .NET Worker below

Java Worker

In a new terminal, start the Java Worker

cd java
./startlocalworker.sh

Golang Worker

In a new terminal, start the Golang Worker

cd go
./startlocalworker.sh

.NET Worker

In a new terminal, start the .NET Worker

cd dotnet
./startlocalworker.sh

Python Worker

In a new terminal, start the Python Worker

cd python
# if you haven't done this yet, install the dependencies
poetry install
./startlocalworker.sh

Running the Demo on Temporal Cloud

Set up a search attribute in your namespace using the following command

tcld login
tcld namespace search-attributes add --namespace <namespace>.<accountId> --search-attribute "Step=Keyword"

Copy the setcloundenv.example to setcloudenv.sh

cp setcloudenv.example setcloudenv.sh

Edit setcloudenv.sh to match your Temporal Cloud account:

export TEMPORAL_ADDRESS=<namespace>.<accountID>.tmprl.cloud:7233
export TEMPORAL_NAMESPACE=<namespace>.<accountID>
export TEMPORAL_CERT_PATH="/path/to/cert.pem"
export TEMPORAL_KEY_PATH="/path/to/key.key"

Start the UX

Next, start the UX which is written using the Java SDK

cd ui
./startcloudwebui.sh

Start a Worker

Now start a worker. You can choose to use the Java, Go or .NET Worker below

Java Worker

In a new terminal, start the Java Worker

cd java
./startcloudworker.sh

Golang Worker

In a new terminal, start the Golang Worker

cd go
./startcloudworker.sh

.NET Worker

In a new terminal, start the .NET Worker

cd dotnet
./startcloudworker.sh

Python Worker

In a new terminal, start the Python Worker

cd python
# if you haven't done this yet, install the dependencies
poetry install
./startcloudworker.sh

Using Encryption

This demo supports encyrption by setting the environment variable ENCRYPT_PAYLOADS to true. To make this easier, each of the start*.sh files will use the first parameter to set this variable. If you want to use encryption, be sure to set this for the UI and the worker that you choose. For example:

Start the UX

Next, start the UX which is written using the Java SDK

cd ui
./startcloudwebui.sh true

Java Worker Example -- works for other SDKs as well

In a new terminal, start the Java Worker

cd java
./startcloudworker.sh true

To view the decrypted data in your browser, you can set the Codec Server to use https://codec.tmprl-demo.cloud. Be sure to enable the "Pass the user access token" slider. This will work as long as you do not change the encryption key.